/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp
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1 | | //===---- CGOpenMPRuntimeGPU.cpp - Interface to OpenMP GPU Runtimes ----===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // This provides a generalized class for OpenMP runtime code generation |
10 | | // specialized by GPU targets NVPTX and AMDGCN. |
11 | | // |
12 | | //===----------------------------------------------------------------------===// |
13 | | |
14 | | #include "CGOpenMPRuntimeGPU.h" |
15 | | #include "CGOpenMPRuntimeNVPTX.h" |
16 | | #include "CodeGenFunction.h" |
17 | | #include "clang/AST/Attr.h" |
18 | | #include "clang/AST/DeclOpenMP.h" |
19 | | #include "clang/AST/StmtOpenMP.h" |
20 | | #include "clang/AST/StmtVisitor.h" |
21 | | #include "clang/Basic/Cuda.h" |
22 | | #include "llvm/ADT/SmallPtrSet.h" |
23 | | #include "llvm/Frontend/OpenMP/OMPGridValues.h" |
24 | | #include "llvm/IR/IntrinsicsNVPTX.h" |
25 | | |
26 | | using namespace clang; |
27 | | using namespace CodeGen; |
28 | | using namespace llvm::omp; |
29 | | |
30 | | namespace { |
31 | | /// Pre(post)-action for different OpenMP constructs specialized for NVPTX. |
32 | | class NVPTXActionTy final : public PrePostActionTy { |
33 | | llvm::FunctionCallee EnterCallee = nullptr; |
34 | | ArrayRef<llvm::Value *> EnterArgs; |
35 | | llvm::FunctionCallee ExitCallee = nullptr; |
36 | | ArrayRef<llvm::Value *> ExitArgs; |
37 | | bool Conditional = false; |
38 | | llvm::BasicBlock *ContBlock = nullptr; |
39 | | |
40 | | public: |
41 | | NVPTXActionTy(llvm::FunctionCallee EnterCallee, |
42 | | ArrayRef<llvm::Value *> EnterArgs, |
43 | | llvm::FunctionCallee ExitCallee, |
44 | | ArrayRef<llvm::Value *> ExitArgs, bool Conditional = false) |
45 | | : EnterCallee(EnterCallee), EnterArgs(EnterArgs), ExitCallee(ExitCallee), |
46 | 58 | ExitArgs(ExitArgs), Conditional(Conditional) {} |
47 | 19 | void Enter(CodeGenFunction &CGF) override { |
48 | 19 | llvm::Value *EnterRes = CGF.EmitRuntimeCall(EnterCallee, EnterArgs); |
49 | 19 | if (Conditional) { |
50 | 0 | llvm::Value *CallBool = CGF.Builder.CreateIsNotNull(EnterRes); |
51 | 0 | auto *ThenBlock = CGF.createBasicBlock("omp_if.then"); |
52 | 0 | ContBlock = CGF.createBasicBlock("omp_if.end"); |
53 | | // Generate the branch (If-stmt) |
54 | 0 | CGF.Builder.CreateCondBr(CallBool, ThenBlock, ContBlock); |
55 | 0 | CGF.EmitBlock(ThenBlock); |
56 | 0 | } |
57 | 19 | } |
58 | 0 | void Done(CodeGenFunction &CGF) { |
59 | 0 | // Emit the rest of blocks/branches |
60 | 0 | CGF.EmitBranch(ContBlock); |
61 | 0 | CGF.EmitBlock(ContBlock, true); |
62 | 0 | } |
63 | 58 | void Exit(CodeGenFunction &CGF) override { |
64 | 58 | CGF.EmitRuntimeCall(ExitCallee, ExitArgs); |
65 | 58 | } |
66 | | }; |
67 | | |
68 | | /// A class to track the execution mode when codegening directives within |
69 | | /// a target region. The appropriate mode (SPMD|NON-SPMD) is set on entry |
70 | | /// to the target region and used by containing directives such as 'parallel' |
71 | | /// to emit optimized code. |
72 | | class ExecutionRuntimeModesRAII { |
73 | | private: |
74 | | CGOpenMPRuntimeGPU::ExecutionMode SavedExecMode = |
75 | | CGOpenMPRuntimeGPU::EM_Unknown; |
76 | | CGOpenMPRuntimeGPU::ExecutionMode &ExecMode; |
77 | | bool SavedRuntimeMode = false; |
78 | | bool *RuntimeMode = nullptr; |
79 | | |
80 | | public: |
81 | | /// Constructor for Non-SPMD mode. |
82 | | ExecutionRuntimeModesRAII(CGOpenMPRuntimeGPU::ExecutionMode &ExecMode) |
83 | 195 | : ExecMode(ExecMode) { |
84 | 195 | SavedExecMode = ExecMode; |
85 | 195 | ExecMode = CGOpenMPRuntimeGPU::EM_NonSPMD; |
86 | 195 | } |
87 | | /// Constructor for SPMD mode. |
88 | | ExecutionRuntimeModesRAII(CGOpenMPRuntimeGPU::ExecutionMode &ExecMode, |
89 | | bool &RuntimeMode, bool FullRuntimeMode) |
90 | 676 | : ExecMode(ExecMode), RuntimeMode(&RuntimeMode) { |
91 | 676 | SavedExecMode = ExecMode; |
92 | 676 | SavedRuntimeMode = RuntimeMode; |
93 | 676 | ExecMode = CGOpenMPRuntimeGPU::EM_SPMD; |
94 | 676 | RuntimeMode = FullRuntimeMode; |
95 | 676 | } |
96 | 871 | ~ExecutionRuntimeModesRAII() { |
97 | 871 | ExecMode = SavedExecMode; |
98 | 871 | if (RuntimeMode) |
99 | 676 | *RuntimeMode = SavedRuntimeMode; |
100 | 871 | } |
101 | | }; |
102 | | |
103 | | /// GPU Configuration: This information can be derived from cuda registers, |
104 | | /// however, providing compile time constants helps generate more efficient |
105 | | /// code. For all practical purposes this is fine because the configuration |
106 | | /// is the same for all known NVPTX architectures. |
107 | | enum MachineConfiguration : unsigned { |
108 | | /// See "llvm/Frontend/OpenMP/OMPGridValues.h" for various related target |
109 | | /// specific Grid Values like GV_Warp_Size, GV_Warp_Size_Log2, |
110 | | /// and GV_Warp_Size_Log2_Mask. |
111 | | |
112 | | /// Global memory alignment for performance. |
113 | | GlobalMemoryAlignment = 128, |
114 | | |
115 | | /// Maximal size of the shared memory buffer. |
116 | | SharedMemorySize = 128, |
117 | | }; |
118 | | |
119 | 70 | static const ValueDecl *getPrivateItem(const Expr *RefExpr) { |
120 | 70 | RefExpr = RefExpr->IgnoreParens(); |
121 | 70 | if (const auto *ASE = dyn_cast<ArraySubscriptExpr>(RefExpr)) { |
122 | 0 | const Expr *Base = ASE->getBase()->IgnoreParenImpCasts(); |
123 | 0 | while (const auto *TempASE = dyn_cast<ArraySubscriptExpr>(Base)) |
124 | 0 | Base = TempASE->getBase()->IgnoreParenImpCasts(); |
125 | 0 | RefExpr = Base; |
126 | 70 | } else if (auto *OASE = dyn_cast<OMPArraySectionExpr>(RefExpr)) { |
127 | 0 | const Expr *Base = OASE->getBase()->IgnoreParenImpCasts(); |
128 | 0 | while (const auto *TempOASE = dyn_cast<OMPArraySectionExpr>(Base)) |
129 | 0 | Base = TempOASE->getBase()->IgnoreParenImpCasts(); |
130 | 0 | while (const auto *TempASE = dyn_cast<ArraySubscriptExpr>(Base)) |
131 | 0 | Base = TempASE->getBase()->IgnoreParenImpCasts(); |
132 | 0 | RefExpr = Base; |
133 | 0 | } |
134 | 70 | RefExpr = RefExpr->IgnoreParenImpCasts(); |
135 | 70 | if (const auto *DE = dyn_cast<DeclRefExpr>(RefExpr)) |
136 | 70 | return cast<ValueDecl>(DE->getDecl()->getCanonicalDecl()); |
137 | 0 | const auto *ME = cast<MemberExpr>(RefExpr); |
138 | 0 | return cast<ValueDecl>(ME->getMemberDecl()->getCanonicalDecl()); |
139 | 0 | } |
140 | | |
141 | | |
142 | | static RecordDecl *buildRecordForGlobalizedVars( |
143 | | ASTContext &C, ArrayRef<const ValueDecl *> EscapedDecls, |
144 | | ArrayRef<const ValueDecl *> EscapedDeclsForTeams, |
145 | | llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
146 | 862 | &MappedDeclsFields, int BufSize) { |
147 | 862 | using VarsDataTy = std::pair<CharUnits /*Align*/, const ValueDecl *>; |
148 | 862 | if (EscapedDecls.empty() && EscapedDeclsForTeams.empty()830 ) |
149 | 695 | return nullptr; |
150 | 167 | SmallVector<VarsDataTy, 4> GlobalizedVars; |
151 | 167 | for (const ValueDecl *D : EscapedDecls) |
152 | 44 | GlobalizedVars.emplace_back( |
153 | 44 | CharUnits::fromQuantity(std::max( |
154 | 44 | C.getDeclAlign(D).getQuantity(), |
155 | 44 | static_cast<CharUnits::QuantityType>(GlobalMemoryAlignment))), |
156 | 44 | D); |
157 | 167 | for (const ValueDecl *D : EscapedDeclsForTeams) |
158 | 165 | GlobalizedVars.emplace_back(C.getDeclAlign(D), D); |
159 | 45 | llvm::stable_sort(GlobalizedVars, [](VarsDataTy L, VarsDataTy R) { |
160 | 45 | return L.first > R.first; |
161 | 45 | }); |
162 | | |
163 | | // Build struct _globalized_locals_ty { |
164 | | // /* globalized vars */[WarSize] align (max(decl_align, |
165 | | // GlobalMemoryAlignment)) |
166 | | // /* globalized vars */ for EscapedDeclsForTeams |
167 | | // }; |
168 | 167 | RecordDecl *GlobalizedRD = C.buildImplicitRecord("_globalized_locals_ty"); |
169 | 167 | GlobalizedRD->startDefinition(); |
170 | 167 | llvm::SmallPtrSet<const ValueDecl *, 16> SingleEscaped( |
171 | 167 | EscapedDeclsForTeams.begin(), EscapedDeclsForTeams.end()); |
172 | 209 | for (const auto &Pair : GlobalizedVars) { |
173 | 209 | const ValueDecl *VD = Pair.second; |
174 | 209 | QualType Type = VD->getType(); |
175 | 209 | if (Type->isLValueReferenceType()) |
176 | 0 | Type = C.getPointerType(Type.getNonReferenceType()); |
177 | 209 | else |
178 | 209 | Type = Type.getNonReferenceType(); |
179 | 209 | SourceLocation Loc = VD->getLocation(); |
180 | 209 | FieldDecl *Field; |
181 | 209 | if (SingleEscaped.count(VD)) { |
182 | 165 | Field = FieldDecl::Create( |
183 | 165 | C, GlobalizedRD, Loc, Loc, VD->getIdentifier(), Type, |
184 | 165 | C.getTrivialTypeSourceInfo(Type, SourceLocation()), |
185 | 165 | /*BW=*/nullptr, /*Mutable=*/false, |
186 | 165 | /*InitStyle=*/ICIS_NoInit); |
187 | 165 | Field->setAccess(AS_public); |
188 | 165 | if (VD->hasAttrs()) { |
189 | 18 | for (specific_attr_iterator<AlignedAttr> I(VD->getAttrs().begin()), |
190 | 18 | E(VD->getAttrs().end()); |
191 | 18 | I != E; ++I0 ) |
192 | 0 | Field->addAttr(*I); |
193 | 18 | } |
194 | 44 | } else { |
195 | 44 | llvm::APInt ArraySize(32, BufSize); |
196 | 44 | Type = C.getConstantArrayType(Type, ArraySize, nullptr, ArrayType::Normal, |
197 | 44 | 0); |
198 | 44 | Field = FieldDecl::Create( |
199 | 44 | C, GlobalizedRD, Loc, Loc, VD->getIdentifier(), Type, |
200 | 44 | C.getTrivialTypeSourceInfo(Type, SourceLocation()), |
201 | 44 | /*BW=*/nullptr, /*Mutable=*/false, |
202 | 44 | /*InitStyle=*/ICIS_NoInit); |
203 | 44 | Field->setAccess(AS_public); |
204 | 44 | llvm::APInt Align(32, std::max(C.getDeclAlign(VD).getQuantity(), |
205 | 44 | static_cast<CharUnits::QuantityType>( |
206 | 44 | GlobalMemoryAlignment))); |
207 | 44 | Field->addAttr(AlignedAttr::CreateImplicit( |
208 | 44 | C, /*IsAlignmentExpr=*/true, |
209 | 44 | IntegerLiteral::Create(C, Align, |
210 | 44 | C.getIntTypeForBitwidth(32, /*Signed=*/0), |
211 | 44 | SourceLocation()), |
212 | 44 | {}, AttributeCommonInfo::AS_GNU, AlignedAttr::GNU_aligned)); |
213 | 44 | } |
214 | 209 | GlobalizedRD->addDecl(Field); |
215 | 209 | MappedDeclsFields.try_emplace(VD, Field); |
216 | 209 | } |
217 | 167 | GlobalizedRD->completeDefinition(); |
218 | 167 | return GlobalizedRD; |
219 | 167 | } |
220 | | |
221 | | /// Get the list of variables that can escape their declaration context. |
222 | | class CheckVarsEscapingDeclContext final |
223 | | : public ConstStmtVisitor<CheckVarsEscapingDeclContext> { |
224 | | CodeGenFunction &CGF; |
225 | | llvm::SetVector<const ValueDecl *> EscapedDecls; |
226 | | llvm::SetVector<const ValueDecl *> EscapedVariableLengthDecls; |
227 | | llvm::SmallPtrSet<const Decl *, 4> EscapedParameters; |
228 | | RecordDecl *GlobalizedRD = nullptr; |
229 | | llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> MappedDeclsFields; |
230 | | bool AllEscaped = false; |
231 | | bool IsForCombinedParallelRegion = false; |
232 | | |
233 | 269 | void markAsEscaped(const ValueDecl *VD) { |
234 | | // Do not globalize declare target variables. |
235 | 269 | if (!isa<VarDecl>(VD) || |
236 | 269 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD)) |
237 | 0 | return; |
238 | 269 | VD = cast<ValueDecl>(VD->getCanonicalDecl()); |
239 | | // Use user-specified allocation. |
240 | 269 | if (VD->hasAttrs() && VD->hasAttr<OMPAllocateDeclAttr>()0 ) |
241 | 0 | return; |
242 | | // Variables captured by value must be globalized. |
243 | 269 | if (auto *CSI = CGF.CapturedStmtInfo) { |
244 | 230 | if (const FieldDecl *FD = CSI->lookup(cast<VarDecl>(VD))) { |
245 | | // Check if need to capture the variable that was already captured by |
246 | | // value in the outer region. |
247 | 171 | if (!IsForCombinedParallelRegion) { |
248 | 171 | if (!FD->hasAttrs()) |
249 | 2 | return; |
250 | 169 | const auto *Attr = FD->getAttr<OMPCaptureKindAttr>(); |
251 | 169 | if (!Attr) |
252 | 0 | return; |
253 | 169 | if (((Attr->getCaptureKind() != OMPC_map) && |
254 | 76 | !isOpenMPPrivate(Attr->getCaptureKind())) || |
255 | 169 | ((Attr->getCaptureKind() == OMPC_map) && |
256 | 93 | !FD->getType()->isAnyPointerType())) |
257 | 93 | return; |
258 | 76 | } |
259 | 76 | if (!FD->getType()->isReferenceType()) { |
260 | 50 | assert(!VD->getType()->isVariablyModifiedType() && |
261 | 50 | "Parameter captured by value with variably modified type"); |
262 | 50 | EscapedParameters.insert(VD); |
263 | 26 | } else if (!IsForCombinedParallelRegion) { |
264 | 26 | return; |
265 | 26 | } |
266 | 148 | } |
267 | 230 | } |
268 | 148 | if ((!CGF.CapturedStmtInfo || |
269 | 109 | (IsForCombinedParallelRegion && CGF.CapturedStmtInfo0 )) && |
270 | 39 | VD->getType()->isReferenceType()) |
271 | | // Do not globalize variables with reference type. |
272 | 18 | return; |
273 | 130 | if (VD->getType()->isVariablyModifiedType()) |
274 | 0 | EscapedVariableLengthDecls.insert(VD); |
275 | 130 | else |
276 | 130 | EscapedDecls.insert(VD); |
277 | 130 | } |
278 | | |
279 | 259 | void VisitValueDecl(const ValueDecl *VD) { |
280 | 259 | if (VD->getType()->isLValueReferenceType()) |
281 | 0 | markAsEscaped(VD); |
282 | 259 | if (const auto *VarD = dyn_cast<VarDecl>(VD)) { |
283 | 259 | if (!isa<ParmVarDecl>(VarD) && VarD->hasInit()) { |
284 | 224 | const bool SavedAllEscaped = AllEscaped; |
285 | 224 | AllEscaped = VD->getType()->isLValueReferenceType(); |
286 | 224 | Visit(VarD->getInit()); |
287 | 224 | AllEscaped = SavedAllEscaped; |
288 | 224 | } |
289 | 259 | } |
290 | 259 | } |
291 | | void VisitOpenMPCapturedStmt(const CapturedStmt *S, |
292 | | ArrayRef<OMPClause *> Clauses, |
293 | 105 | bool IsCombinedParallelRegion) { |
294 | 105 | if (!S) |
295 | 0 | return; |
296 | 105 | for (const CapturedStmt::Capture &C : S->captures()) { |
297 | 86 | if (C.capturesVariable() && !C.capturesVariableByCopy()) { |
298 | 86 | const ValueDecl *VD = C.getCapturedVar(); |
299 | 86 | bool SavedIsForCombinedParallelRegion = IsForCombinedParallelRegion; |
300 | 86 | if (IsCombinedParallelRegion) { |
301 | | // Check if the variable is privatized in the combined construct and |
302 | | // those private copies must be shared in the inner parallel |
303 | | // directive. |
304 | 0 | IsForCombinedParallelRegion = false; |
305 | 0 | for (const OMPClause *C : Clauses) { |
306 | 0 | if (!isOpenMPPrivate(C->getClauseKind()) || |
307 | 0 | C->getClauseKind() == OMPC_reduction || |
308 | 0 | C->getClauseKind() == OMPC_linear || |
309 | 0 | C->getClauseKind() == OMPC_private) |
310 | 0 | continue; |
311 | 0 | ArrayRef<const Expr *> Vars; |
312 | 0 | if (const auto *PC = dyn_cast<OMPFirstprivateClause>(C)) |
313 | 0 | Vars = PC->getVarRefs(); |
314 | 0 | else if (const auto *PC = dyn_cast<OMPLastprivateClause>(C)) |
315 | 0 | Vars = PC->getVarRefs(); |
316 | 0 | else |
317 | 0 | llvm_unreachable("Unexpected clause."); |
318 | 0 | for (const auto *E : Vars) { |
319 | 0 | const Decl *D = |
320 | 0 | cast<DeclRefExpr>(E)->getDecl()->getCanonicalDecl(); |
321 | 0 | if (D == VD->getCanonicalDecl()) { |
322 | 0 | IsForCombinedParallelRegion = true; |
323 | 0 | break; |
324 | 0 | } |
325 | 0 | } |
326 | 0 | if (IsForCombinedParallelRegion) |
327 | 0 | break; |
328 | 0 | } |
329 | 0 | } |
330 | 86 | markAsEscaped(VD); |
331 | 86 | if (isa<OMPCapturedExprDecl>(VD)) |
332 | 0 | VisitValueDecl(VD); |
333 | 86 | IsForCombinedParallelRegion = SavedIsForCombinedParallelRegion; |
334 | 86 | } |
335 | 86 | } |
336 | 105 | } |
337 | | |
338 | 792 | void buildRecordForGlobalizedVars(bool IsInTTDRegion) { |
339 | 792 | assert(!GlobalizedRD && |
340 | 792 | "Record for globalized variables is built already."); |
341 | 792 | ArrayRef<const ValueDecl *> EscapedDeclsForParallel, EscapedDeclsForTeams; |
342 | 792 | unsigned WarpSize = CGF.getTarget().getGridValue(llvm::omp::GV_Warp_Size); |
343 | 792 | if (IsInTTDRegion) |
344 | 306 | EscapedDeclsForTeams = EscapedDecls.getArrayRef(); |
345 | 486 | else |
346 | 486 | EscapedDeclsForParallel = EscapedDecls.getArrayRef(); |
347 | 792 | GlobalizedRD = ::buildRecordForGlobalizedVars( |
348 | 792 | CGF.getContext(), EscapedDeclsForParallel, EscapedDeclsForTeams, |
349 | 792 | MappedDeclsFields, WarpSize); |
350 | 792 | } |
351 | | |
352 | | public: |
353 | | CheckVarsEscapingDeclContext(CodeGenFunction &CGF, |
354 | | ArrayRef<const ValueDecl *> TeamsReductions) |
355 | 792 | : CGF(CGF), EscapedDecls(TeamsReductions.begin(), TeamsReductions.end()) { |
356 | 792 | } |
357 | 792 | virtual ~CheckVarsEscapingDeclContext() = default; |
358 | 258 | void VisitDeclStmt(const DeclStmt *S) { |
359 | 258 | if (!S) |
360 | 0 | return; |
361 | 258 | for (const Decl *D : S->decls()) |
362 | 264 | if (const auto *VD = dyn_cast_or_null<ValueDecl>(D)) |
363 | 259 | VisitValueDecl(VD); |
364 | 258 | } |
365 | 118 | void VisitOMPExecutableDirective(const OMPExecutableDirective *D) { |
366 | 118 | if (!D) |
367 | 0 | return; |
368 | 118 | if (!D->hasAssociatedStmt()) |
369 | 6 | return; |
370 | 112 | if (const auto *S = |
371 | 106 | dyn_cast_or_null<CapturedStmt>(D->getAssociatedStmt())) { |
372 | | // Do not analyze directives that do not actually require capturing, |
373 | | // like `omp for` or `omp simd` directives. |
374 | 106 | llvm::SmallVector<OpenMPDirectiveKind, 4> CaptureRegions; |
375 | 106 | getOpenMPCaptureRegions(CaptureRegions, D->getDirectiveKind()); |
376 | 106 | if (CaptureRegions.size() == 1 && CaptureRegions.back() == OMPD_unknown) { |
377 | 1 | VisitStmt(S->getCapturedStmt()); |
378 | 1 | return; |
379 | 1 | } |
380 | 105 | VisitOpenMPCapturedStmt( |
381 | 105 | S, D->clauses(), |
382 | 105 | CaptureRegions.back() == OMPD_parallel && |
383 | 77 | isOpenMPDistributeDirective(D->getDirectiveKind())); |
384 | 105 | } |
385 | 112 | } |
386 | 27 | void VisitCapturedStmt(const CapturedStmt *S) { |
387 | 27 | if (!S) |
388 | 0 | return; |
389 | 27 | for (const CapturedStmt::Capture &C : S->captures()) { |
390 | 7 | if (C.capturesVariable() && !C.capturesVariableByCopy()1 ) { |
391 | 1 | const ValueDecl *VD = C.getCapturedVar(); |
392 | 1 | markAsEscaped(VD); |
393 | 1 | if (isa<OMPCapturedExprDecl>(VD)) |
394 | 0 | VisitValueDecl(VD); |
395 | 1 | } |
396 | 7 | } |
397 | 27 | } |
398 | 1 | void VisitLambdaExpr(const LambdaExpr *E) { |
399 | 1 | if (!E) |
400 | 0 | return; |
401 | 1 | for (const LambdaCapture &C : E->captures()) { |
402 | 0 | if (C.capturesVariable()) { |
403 | 0 | if (C.getCaptureKind() == LCK_ByRef) { |
404 | 0 | const ValueDecl *VD = C.getCapturedVar(); |
405 | 0 | markAsEscaped(VD); |
406 | 0 | if (E->isInitCapture(&C) || isa<OMPCapturedExprDecl>(VD)) |
407 | 0 | VisitValueDecl(VD); |
408 | 0 | } |
409 | 0 | } |
410 | 0 | } |
411 | 1 | } |
412 | 0 | void VisitBlockExpr(const BlockExpr *E) { |
413 | 0 | if (!E) |
414 | 0 | return; |
415 | 0 | for (const BlockDecl::Capture &C : E->getBlockDecl()->captures()) { |
416 | 0 | if (C.isByRef()) { |
417 | 0 | const VarDecl *VD = C.getVariable(); |
418 | 0 | markAsEscaped(VD); |
419 | 0 | if (isa<OMPCapturedExprDecl>(VD) || VD->isInitCapture()) |
420 | 0 | VisitValueDecl(VD); |
421 | 0 | } |
422 | 0 | } |
423 | 0 | } |
424 | 1.24k | void VisitCallExpr(const CallExpr *E) { |
425 | 1.24k | if (!E) |
426 | 0 | return; |
427 | 1.36k | for (const Expr *Arg : E->arguments())1.24k { |
428 | 1.36k | if (!Arg) |
429 | 0 | continue; |
430 | 1.36k | if (Arg->isLValue()) { |
431 | 85 | const bool SavedAllEscaped = AllEscaped; |
432 | 85 | AllEscaped = true; |
433 | 85 | Visit(Arg); |
434 | 85 | AllEscaped = SavedAllEscaped; |
435 | 1.28k | } else { |
436 | 1.28k | Visit(Arg); |
437 | 1.28k | } |
438 | 1.36k | } |
439 | 1.24k | Visit(E->getCallee()); |
440 | 1.24k | } |
441 | 3.53k | void VisitDeclRefExpr(const DeclRefExpr *E) { |
442 | 3.53k | if (!E) |
443 | 0 | return; |
444 | 3.53k | const ValueDecl *VD = E->getDecl(); |
445 | 3.53k | if (AllEscaped) |
446 | 182 | markAsEscaped(VD); |
447 | 3.53k | if (isa<OMPCapturedExprDecl>(VD)) |
448 | 0 | VisitValueDecl(VD); |
449 | 3.53k | else if (const auto *VarD = dyn_cast<VarDecl>(VD)) |
450 | 2.36k | if (VarD->isInitCapture()) |
451 | 0 | VisitValueDecl(VD); |
452 | 3.53k | } |
453 | 271 | void VisitUnaryOperator(const UnaryOperator *E) { |
454 | 271 | if (!E) |
455 | 0 | return; |
456 | 271 | if (E->getOpcode() == UO_AddrOf) { |
457 | 52 | const bool SavedAllEscaped = AllEscaped; |
458 | 52 | AllEscaped = true; |
459 | 52 | Visit(E->getSubExpr()); |
460 | 52 | AllEscaped = SavedAllEscaped; |
461 | 219 | } else { |
462 | 219 | Visit(E->getSubExpr()); |
463 | 219 | } |
464 | 271 | } |
465 | 3.44k | void VisitImplicitCastExpr(const ImplicitCastExpr *E) { |
466 | 3.44k | if (!E) |
467 | 0 | return; |
468 | 3.44k | if (E->getCastKind() == CK_ArrayToPointerDecay) { |
469 | 76 | const bool SavedAllEscaped = AllEscaped; |
470 | 76 | AllEscaped = true; |
471 | 76 | Visit(E->getSubExpr()); |
472 | 76 | AllEscaped = SavedAllEscaped; |
473 | 3.36k | } else { |
474 | 3.36k | Visit(E->getSubExpr()); |
475 | 3.36k | } |
476 | 3.44k | } |
477 | 3.22k | void VisitExpr(const Expr *E) { |
478 | 3.22k | if (!E) |
479 | 0 | return; |
480 | 3.22k | bool SavedAllEscaped = AllEscaped; |
481 | 3.22k | if (!E->isLValue()) |
482 | 2.46k | AllEscaped = false; |
483 | 3.22k | for (const Stmt *Child : E->children()) |
484 | 3.92k | if (Child) |
485 | 3.92k | Visit(Child); |
486 | 3.22k | AllEscaped = SavedAllEscaped; |
487 | 3.22k | } |
488 | 1.33k | void VisitStmt(const Stmt *S) { |
489 | 1.33k | if (!S) |
490 | 0 | return; |
491 | 1.33k | for (const Stmt *Child : S->children()) |
492 | 2.20k | if (Child) |
493 | 2.18k | Visit(Child); |
494 | 1.33k | } |
495 | | |
496 | | /// Returns the record that handles all the escaped local variables and used |
497 | | /// instead of their original storage. |
498 | 792 | const RecordDecl *getGlobalizedRecord(bool IsInTTDRegion) { |
499 | 792 | if (!GlobalizedRD) |
500 | 792 | buildRecordForGlobalizedVars(IsInTTDRegion); |
501 | 792 | return GlobalizedRD; |
502 | 792 | } |
503 | | |
504 | | /// Returns the field in the globalized record for the escaped variable. |
505 | 127 | const FieldDecl *getFieldForGlobalizedVar(const ValueDecl *VD) const { |
506 | 127 | assert(GlobalizedRD && |
507 | 127 | "Record for globalized variables must be generated already."); |
508 | 127 | auto I = MappedDeclsFields.find(VD); |
509 | 127 | if (I == MappedDeclsFields.end()) |
510 | 0 | return nullptr; |
511 | 127 | return I->getSecond(); |
512 | 127 | } |
513 | | |
514 | | /// Returns the list of the escaped local variables/parameters. |
515 | 97 | ArrayRef<const ValueDecl *> getEscapedDecls() const { |
516 | 97 | return EscapedDecls.getArrayRef(); |
517 | 97 | } |
518 | | |
519 | | /// Checks if the escaped local variable is actually a parameter passed by |
520 | | /// value. |
521 | 174 | const llvm::SmallPtrSetImpl<const Decl *> &getEscapedParameters() const { |
522 | 174 | return EscapedParameters; |
523 | 174 | } |
524 | | |
525 | | /// Returns the list of the escaped variables with the variably modified |
526 | | /// types. |
527 | 782 | ArrayRef<const ValueDecl *> getEscapedVariableLengthDecls() const { |
528 | 782 | return EscapedVariableLengthDecls.getArrayRef(); |
529 | 782 | } |
530 | | }; |
531 | | } // anonymous namespace |
532 | | |
533 | | /// Get the id of the warp in the block. |
534 | | /// We assume that the warp size is 32, which is always the case |
535 | | /// on the NVPTX device, to generate more efficient code. |
536 | 39 | static llvm::Value *getNVPTXWarpID(CodeGenFunction &CGF) { |
537 | 39 | CGBuilderTy &Bld = CGF.Builder; |
538 | 39 | unsigned LaneIDBits = |
539 | 39 | CGF.getTarget().getGridValue(llvm::omp::GV_Warp_Size_Log2); |
540 | 39 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
541 | 39 | return Bld.CreateAShr(RT.getGPUThreadID(CGF), LaneIDBits, "nvptx_warp_id"); |
542 | 39 | } |
543 | | |
544 | | /// Get the id of the current lane in the Warp. |
545 | | /// We assume that the warp size is 32, which is always the case |
546 | | /// on the NVPTX device, to generate more efficient code. |
547 | 50 | static llvm::Value *getNVPTXLaneID(CodeGenFunction &CGF) { |
548 | 50 | CGBuilderTy &Bld = CGF.Builder; |
549 | 50 | unsigned LaneIDMask = CGF.getContext().getTargetInfo().getGridValue( |
550 | 50 | llvm::omp::GV_Warp_Size_Log2_Mask); |
551 | 50 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
552 | 50 | return Bld.CreateAnd(RT.getGPUThreadID(CGF), Bld.getInt32(LaneIDMask), |
553 | 50 | "nvptx_lane_id"); |
554 | 50 | } |
555 | | |
556 | | /// Get the value of the thread_limit clause in the teams directive. |
557 | | /// For the 'generic' execution mode, the runtime encodes thread_limit in |
558 | | /// the launch parameters, always starting thread_limit+warpSize threads per |
559 | | /// CTA. The threads in the last warp are reserved for master execution. |
560 | | /// For the 'spmd' execution mode, all threads in a CTA are part of the team. |
561 | | static llvm::Value *getThreadLimit(CodeGenFunction &CGF, |
562 | 1.06k | bool IsInSPMDExecutionMode = false) { |
563 | 1.06k | CGBuilderTy &Bld = CGF.Builder; |
564 | 1.06k | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
565 | 1.06k | return IsInSPMDExecutionMode |
566 | 676 | ? RT.getGPUNumThreads(CGF) |
567 | 390 | : Bld.CreateNUWSub(RT.getGPUNumThreads(CGF), |
568 | 390 | RT.getGPUWarpSize(CGF), "thread_limit"); |
569 | 1.06k | } |
570 | | |
571 | | /// Get the thread id of the OMP master thread. |
572 | | /// The master thread id is the first thread (lane) of the last warp in the |
573 | | /// GPU block. Warp size is assumed to be some power of 2. |
574 | | /// Thread id is 0 indexed. |
575 | | /// E.g: If NumThreads is 33, master id is 32. |
576 | | /// If NumThreads is 64, master id is 32. |
577 | | /// If NumThreads is 1024, master id is 992. |
578 | 195 | static llvm::Value *getMasterThreadID(CodeGenFunction &CGF) { |
579 | 195 | CGBuilderTy &Bld = CGF.Builder; |
580 | 195 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
581 | 195 | llvm::Value *NumThreads = RT.getGPUNumThreads(CGF); |
582 | | // We assume that the warp size is a power of 2. |
583 | 195 | llvm::Value *Mask = Bld.CreateNUWSub(RT.getGPUWarpSize(CGF), Bld.getInt32(1)); |
584 | | |
585 | 195 | return Bld.CreateAnd(Bld.CreateNUWSub(NumThreads, Bld.getInt32(1)), |
586 | 195 | Bld.CreateNot(Mask), "master_tid"); |
587 | 195 | } |
588 | | |
589 | | CGOpenMPRuntimeGPU::WorkerFunctionState::WorkerFunctionState( |
590 | | CodeGenModule &CGM, SourceLocation Loc) |
591 | | : WorkerFn(nullptr), CGFI(CGM.getTypes().arrangeNullaryFunction()), |
592 | 195 | Loc(Loc) { |
593 | 195 | createWorkerFunction(CGM); |
594 | 195 | } |
595 | | |
596 | | void CGOpenMPRuntimeGPU::WorkerFunctionState::createWorkerFunction( |
597 | 195 | CodeGenModule &CGM) { |
598 | | // Create an worker function with no arguments. |
599 | | |
600 | 195 | WorkerFn = llvm::Function::Create( |
601 | 195 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
602 | 195 | /*placeholder=*/"_worker", &CGM.getModule()); |
603 | 195 | CGM.SetInternalFunctionAttributes(GlobalDecl(), WorkerFn, CGFI); |
604 | 195 | WorkerFn->setDoesNotRecurse(); |
605 | 195 | } |
606 | | |
607 | | CGOpenMPRuntimeGPU::ExecutionMode |
608 | 7.92k | CGOpenMPRuntimeGPU::getExecutionMode() const { |
609 | 7.92k | return CurrentExecutionMode; |
610 | 7.92k | } |
611 | | |
612 | | static CGOpenMPRuntimeGPU::DataSharingMode |
613 | 17.4k | getDataSharingMode(CodeGenModule &CGM) { |
614 | 6.22k | return CGM.getLangOpts().OpenMPCUDAMode ? CGOpenMPRuntimeGPU::CUDA |
615 | 11.2k | : CGOpenMPRuntimeGPU::Generic; |
616 | 17.4k | } |
617 | | |
618 | | /// Check for inner (nested) SPMD construct, if any |
619 | | static bool hasNestedSPMDDirective(ASTContext &Ctx, |
620 | 687 | const OMPExecutableDirective &D) { |
621 | 687 | const auto *CS = D.getInnermostCapturedStmt(); |
622 | 687 | const auto *Body = |
623 | 687 | CS->getCapturedStmt()->IgnoreContainers(/*IgnoreCaptured=*/true); |
624 | 687 | const Stmt *ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
625 | | |
626 | 687 | if (const auto *NestedDir = |
627 | 533 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
628 | 533 | OpenMPDirectiveKind DKind = NestedDir->getDirectiveKind(); |
629 | 533 | switch (D.getDirectiveKind()) { |
630 | 308 | case OMPD_target: |
631 | 308 | if (isOpenMPParallelDirective(DKind)) |
632 | 177 | return true; |
633 | 131 | if (DKind == OMPD_teams) { |
634 | 130 | Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers( |
635 | 130 | /*IgnoreCaptured=*/true); |
636 | 130 | if (!Body) |
637 | 0 | return false; |
638 | 130 | ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
639 | 130 | if (const auto *NND = |
640 | 102 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
641 | 102 | DKind = NND->getDirectiveKind(); |
642 | 102 | if (isOpenMPParallelDirective(DKind)) |
643 | 102 | return true; |
644 | 29 | } |
645 | 130 | } |
646 | 29 | return false; |
647 | 225 | case OMPD_target_teams: |
648 | 225 | return isOpenMPParallelDirective(DKind); |
649 | 0 | case OMPD_target_simd: |
650 | 0 | case OMPD_target_parallel: |
651 | 0 | case OMPD_target_parallel_for: |
652 | 0 | case OMPD_target_parallel_for_simd: |
653 | 0 | case OMPD_target_teams_distribute: |
654 | 0 | case OMPD_target_teams_distribute_simd: |
655 | 0 | case OMPD_target_teams_distribute_parallel_for: |
656 | 0 | case OMPD_target_teams_distribute_parallel_for_simd: |
657 | 0 | case OMPD_parallel: |
658 | 0 | case OMPD_for: |
659 | 0 | case OMPD_parallel_for: |
660 | 0 | case OMPD_parallel_master: |
661 | 0 | case OMPD_parallel_sections: |
662 | 0 | case OMPD_for_simd: |
663 | 0 | case OMPD_parallel_for_simd: |
664 | 0 | case OMPD_cancel: |
665 | 0 | case OMPD_cancellation_point: |
666 | 0 | case OMPD_ordered: |
667 | 0 | case OMPD_threadprivate: |
668 | 0 | case OMPD_allocate: |
669 | 0 | case OMPD_task: |
670 | 0 | case OMPD_simd: |
671 | 0 | case OMPD_sections: |
672 | 0 | case OMPD_section: |
673 | 0 | case OMPD_single: |
674 | 0 | case OMPD_master: |
675 | 0 | case OMPD_critical: |
676 | 0 | case OMPD_taskyield: |
677 | 0 | case OMPD_barrier: |
678 | 0 | case OMPD_taskwait: |
679 | 0 | case OMPD_taskgroup: |
680 | 0 | case OMPD_atomic: |
681 | 0 | case OMPD_flush: |
682 | 0 | case OMPD_depobj: |
683 | 0 | case OMPD_scan: |
684 | 0 | case OMPD_teams: |
685 | 0 | case OMPD_target_data: |
686 | 0 | case OMPD_target_exit_data: |
687 | 0 | case OMPD_target_enter_data: |
688 | 0 | case OMPD_distribute: |
689 | 0 | case OMPD_distribute_simd: |
690 | 0 | case OMPD_distribute_parallel_for: |
691 | 0 | case OMPD_distribute_parallel_for_simd: |
692 | 0 | case OMPD_teams_distribute: |
693 | 0 | case OMPD_teams_distribute_simd: |
694 | 0 | case OMPD_teams_distribute_parallel_for: |
695 | 0 | case OMPD_teams_distribute_parallel_for_simd: |
696 | 0 | case OMPD_target_update: |
697 | 0 | case OMPD_declare_simd: |
698 | 0 | case OMPD_declare_variant: |
699 | 0 | case OMPD_begin_declare_variant: |
700 | 0 | case OMPD_end_declare_variant: |
701 | 0 | case OMPD_declare_target: |
702 | 0 | case OMPD_end_declare_target: |
703 | 0 | case OMPD_declare_reduction: |
704 | 0 | case OMPD_declare_mapper: |
705 | 0 | case OMPD_taskloop: |
706 | 0 | case OMPD_taskloop_simd: |
707 | 0 | case OMPD_master_taskloop: |
708 | 0 | case OMPD_master_taskloop_simd: |
709 | 0 | case OMPD_parallel_master_taskloop: |
710 | 0 | case OMPD_parallel_master_taskloop_simd: |
711 | 0 | case OMPD_requires: |
712 | 0 | case OMPD_unknown: |
713 | 0 | default: |
714 | 0 | llvm_unreachable("Unexpected directive."); |
715 | 154 | } |
716 | 154 | } |
717 | | |
718 | 154 | return false; |
719 | 154 | } |
720 | | |
721 | | static bool supportsSPMDExecutionMode(ASTContext &Ctx, |
722 | 1.57k | const OMPExecutableDirective &D) { |
723 | 1.57k | OpenMPDirectiveKind DirectiveKind = D.getDirectiveKind(); |
724 | 1.57k | switch (DirectiveKind) { |
725 | 448 | case OMPD_target: |
726 | 687 | case OMPD_target_teams: |
727 | 687 | return hasNestedSPMDDirective(Ctx, D); |
728 | 276 | case OMPD_target_parallel: |
729 | 345 | case OMPD_target_parallel_for: |
730 | 345 | case OMPD_target_parallel_for_simd: |
731 | 620 | case OMPD_target_teams_distribute_parallel_for: |
732 | 779 | case OMPD_target_teams_distribute_parallel_for_simd: |
733 | 829 | case OMPD_target_simd: |
734 | 877 | case OMPD_target_teams_distribute_simd: |
735 | 877 | return true; |
736 | 12 | case OMPD_target_teams_distribute: |
737 | 12 | return false; |
738 | 0 | case OMPD_parallel: |
739 | 0 | case OMPD_for: |
740 | 0 | case OMPD_parallel_for: |
741 | 0 | case OMPD_parallel_master: |
742 | 0 | case OMPD_parallel_sections: |
743 | 0 | case OMPD_for_simd: |
744 | 0 | case OMPD_parallel_for_simd: |
745 | 0 | case OMPD_cancel: |
746 | 0 | case OMPD_cancellation_point: |
747 | 0 | case OMPD_ordered: |
748 | 0 | case OMPD_threadprivate: |
749 | 0 | case OMPD_allocate: |
750 | 0 | case OMPD_task: |
751 | 0 | case OMPD_simd: |
752 | 0 | case OMPD_sections: |
753 | 0 | case OMPD_section: |
754 | 0 | case OMPD_single: |
755 | 0 | case OMPD_master: |
756 | 0 | case OMPD_critical: |
757 | 0 | case OMPD_taskyield: |
758 | 0 | case OMPD_barrier: |
759 | 0 | case OMPD_taskwait: |
760 | 0 | case OMPD_taskgroup: |
761 | 0 | case OMPD_atomic: |
762 | 0 | case OMPD_flush: |
763 | 0 | case OMPD_depobj: |
764 | 0 | case OMPD_scan: |
765 | 0 | case OMPD_teams: |
766 | 0 | case OMPD_target_data: |
767 | 0 | case OMPD_target_exit_data: |
768 | 0 | case OMPD_target_enter_data: |
769 | 0 | case OMPD_distribute: |
770 | 0 | case OMPD_distribute_simd: |
771 | 0 | case OMPD_distribute_parallel_for: |
772 | 0 | case OMPD_distribute_parallel_for_simd: |
773 | 0 | case OMPD_teams_distribute: |
774 | 0 | case OMPD_teams_distribute_simd: |
775 | 0 | case OMPD_teams_distribute_parallel_for: |
776 | 0 | case OMPD_teams_distribute_parallel_for_simd: |
777 | 0 | case OMPD_target_update: |
778 | 0 | case OMPD_declare_simd: |
779 | 0 | case OMPD_declare_variant: |
780 | 0 | case OMPD_begin_declare_variant: |
781 | 0 | case OMPD_end_declare_variant: |
782 | 0 | case OMPD_declare_target: |
783 | 0 | case OMPD_end_declare_target: |
784 | 0 | case OMPD_declare_reduction: |
785 | 0 | case OMPD_declare_mapper: |
786 | 0 | case OMPD_taskloop: |
787 | 0 | case OMPD_taskloop_simd: |
788 | 0 | case OMPD_master_taskloop: |
789 | 0 | case OMPD_master_taskloop_simd: |
790 | 0 | case OMPD_parallel_master_taskloop: |
791 | 0 | case OMPD_parallel_master_taskloop_simd: |
792 | 0 | case OMPD_requires: |
793 | 0 | case OMPD_unknown: |
794 | 0 | default: |
795 | 0 | break; |
796 | 0 | } |
797 | 0 | llvm_unreachable( |
798 | 0 | "Unknown programming model for OpenMP directive on NVPTX target."); |
799 | 0 | } |
800 | | |
801 | | /// Check if the directive is loops based and has schedule clause at all or has |
802 | | /// static scheduling. |
803 | 358 | static bool hasStaticScheduling(const OMPExecutableDirective &D) { |
804 | 358 | assert(isOpenMPWorksharingDirective(D.getDirectiveKind()) && |
805 | 358 | isOpenMPLoopDirective(D.getDirectiveKind()) && |
806 | 358 | "Expected loop-based directive."); |
807 | 358 | return !D.hasClausesOfKind<OMPOrderedClause>() && |
808 | 355 | (!D.hasClausesOfKind<OMPScheduleClause>() || |
809 | 196 | llvm::any_of(D.getClausesOfKind<OMPScheduleClause>(), |
810 | 196 | [](const OMPScheduleClause *C) { |
811 | 196 | return C->getScheduleKind() == OMPC_SCHEDULE_static; |
812 | 196 | })); |
813 | 358 | } |
814 | | |
815 | | /// Check for inner (nested) lightweight runtime construct, if any |
816 | | static bool hasNestedLightweightDirective(ASTContext &Ctx, |
817 | 218 | const OMPExecutableDirective &D) { |
818 | 218 | assert(supportsSPMDExecutionMode(Ctx, D) && "Expected SPMD mode directive."); |
819 | 218 | const auto *CS = D.getInnermostCapturedStmt(); |
820 | 218 | const auto *Body = |
821 | 218 | CS->getCapturedStmt()->IgnoreContainers(/*IgnoreCaptured=*/true); |
822 | 218 | const Stmt *ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
823 | | |
824 | 218 | if (const auto *NestedDir = |
825 | 154 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
826 | 154 | OpenMPDirectiveKind DKind = NestedDir->getDirectiveKind(); |
827 | 154 | switch (D.getDirectiveKind()) { |
828 | 72 | case OMPD_target: |
829 | 72 | if (isOpenMPParallelDirective(DKind) && |
830 | 45 | isOpenMPWorksharingDirective(DKind) && isOpenMPLoopDirective(DKind)21 && |
831 | 21 | hasStaticScheduling(*NestedDir)) |
832 | 9 | return true; |
833 | 63 | if (DKind == OMPD_teams_distribute_simd || DKind == OMPD_simd) |
834 | 0 | return true; |
835 | 63 | if (DKind == OMPD_parallel) { |
836 | 24 | Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers( |
837 | 24 | /*IgnoreCaptured=*/true); |
838 | 24 | if (!Body) |
839 | 0 | return false; |
840 | 24 | ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
841 | 24 | if (const auto *NND = |
842 | 21 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
843 | 21 | DKind = NND->getDirectiveKind(); |
844 | 21 | if (isOpenMPWorksharingDirective(DKind) && |
845 | 21 | isOpenMPLoopDirective(DKind) && hasStaticScheduling(*NND)) |
846 | 6 | return true; |
847 | 39 | } |
848 | 39 | } else if (DKind == OMPD_teams) { |
849 | 27 | Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers( |
850 | 27 | /*IgnoreCaptured=*/true); |
851 | 27 | if (!Body) |
852 | 0 | return false; |
853 | 27 | ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
854 | 27 | if (const auto *NND = |
855 | 27 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
856 | 27 | DKind = NND->getDirectiveKind(); |
857 | 27 | if (isOpenMPParallelDirective(DKind) && |
858 | 27 | isOpenMPWorksharingDirective(DKind) && |
859 | 21 | isOpenMPLoopDirective(DKind) && hasStaticScheduling(*NND)) |
860 | 9 | return true; |
861 | 18 | if (DKind == OMPD_parallel) { |
862 | 6 | Body = NND->getInnermostCapturedStmt()->IgnoreContainers( |
863 | 6 | /*IgnoreCaptured=*/true); |
864 | 6 | if (!Body) |
865 | 0 | return false; |
866 | 6 | ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
867 | 6 | if (const auto *NND = |
868 | 0 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
869 | 0 | DKind = NND->getDirectiveKind(); |
870 | 0 | if (isOpenMPWorksharingDirective(DKind) && |
871 | 0 | isOpenMPLoopDirective(DKind) && hasStaticScheduling(*NND)) |
872 | 0 | return true; |
873 | 48 | } |
874 | 6 | } |
875 | 18 | } |
876 | 27 | } |
877 | 48 | return false; |
878 | 61 | case OMPD_target_teams: |
879 | 61 | if (isOpenMPParallelDirective(DKind) && |
880 | 61 | isOpenMPWorksharingDirective(DKind) && isOpenMPLoopDirective(DKind)54 && |
881 | 54 | hasStaticScheduling(*NestedDir)) |
882 | 30 | return true; |
883 | 31 | if (DKind == OMPD_distribute_simd || DKind == OMPD_simd) |
884 | 0 | return true; |
885 | 31 | if (DKind == OMPD_parallel) { |
886 | 7 | Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers( |
887 | 7 | /*IgnoreCaptured=*/true); |
888 | 7 | if (!Body) |
889 | 0 | return false; |
890 | 7 | ChildStmt = CGOpenMPRuntime::getSingleCompoundChild(Ctx, Body); |
891 | 7 | if (const auto *NND = |
892 | 3 | dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) { |
893 | 3 | DKind = NND->getDirectiveKind(); |
894 | 3 | if (isOpenMPWorksharingDirective(DKind) && |
895 | 0 | isOpenMPLoopDirective(DKind) && hasStaticScheduling(*NND)) |
896 | 0 | return true; |
897 | 31 | } |
898 | 7 | } |
899 | 31 | return false; |
900 | 21 | case OMPD_target_parallel: |
901 | 21 | if (DKind == OMPD_simd) |
902 | 0 | return true; |
903 | 21 | return isOpenMPWorksharingDirective(DKind) && |
904 | 21 | isOpenMPLoopDirective(DKind) && hasStaticScheduling(*NestedDir); |
905 | 0 | case OMPD_target_teams_distribute: |
906 | 0 | case OMPD_target_simd: |
907 | 0 | case OMPD_target_parallel_for: |
908 | 0 | case OMPD_target_parallel_for_simd: |
909 | 0 | case OMPD_target_teams_distribute_simd: |
910 | 0 | case OMPD_target_teams_distribute_parallel_for: |
911 | 0 | case OMPD_target_teams_distribute_parallel_for_simd: |
912 | 0 | case OMPD_parallel: |
913 | 0 | case OMPD_for: |
914 | 0 | case OMPD_parallel_for: |
915 | 0 | case OMPD_parallel_master: |
916 | 0 | case OMPD_parallel_sections: |
917 | 0 | case OMPD_for_simd: |
918 | 0 | case OMPD_parallel_for_simd: |
919 | 0 | case OMPD_cancel: |
920 | 0 | case OMPD_cancellation_point: |
921 | 0 | case OMPD_ordered: |
922 | 0 | case OMPD_threadprivate: |
923 | 0 | case OMPD_allocate: |
924 | 0 | case OMPD_task: |
925 | 0 | case OMPD_simd: |
926 | 0 | case OMPD_sections: |
927 | 0 | case OMPD_section: |
928 | 0 | case OMPD_single: |
929 | 0 | case OMPD_master: |
930 | 0 | case OMPD_critical: |
931 | 0 | case OMPD_taskyield: |
932 | 0 | case OMPD_barrier: |
933 | 0 | case OMPD_taskwait: |
934 | 0 | case OMPD_taskgroup: |
935 | 0 | case OMPD_atomic: |
936 | 0 | case OMPD_flush: |
937 | 0 | case OMPD_depobj: |
938 | 0 | case OMPD_scan: |
939 | 0 | case OMPD_teams: |
940 | 0 | case OMPD_target_data: |
941 | 0 | case OMPD_target_exit_data: |
942 | 0 | case OMPD_target_enter_data: |
943 | 0 | case OMPD_distribute: |
944 | 0 | case OMPD_distribute_simd: |
945 | 0 | case OMPD_distribute_parallel_for: |
946 | 0 | case OMPD_distribute_parallel_for_simd: |
947 | 0 | case OMPD_teams_distribute: |
948 | 0 | case OMPD_teams_distribute_simd: |
949 | 0 | case OMPD_teams_distribute_parallel_for: |
950 | 0 | case OMPD_teams_distribute_parallel_for_simd: |
951 | 0 | case OMPD_target_update: |
952 | 0 | case OMPD_declare_simd: |
953 | 0 | case OMPD_declare_variant: |
954 | 0 | case OMPD_begin_declare_variant: |
955 | 0 | case OMPD_end_declare_variant: |
956 | 0 | case OMPD_declare_target: |
957 | 0 | case OMPD_end_declare_target: |
958 | 0 | case OMPD_declare_reduction: |
959 | 0 | case OMPD_declare_mapper: |
960 | 0 | case OMPD_taskloop: |
961 | 0 | case OMPD_taskloop_simd: |
962 | 0 | case OMPD_master_taskloop: |
963 | 0 | case OMPD_master_taskloop_simd: |
964 | 0 | case OMPD_parallel_master_taskloop: |
965 | 0 | case OMPD_parallel_master_taskloop_simd: |
966 | 0 | case OMPD_requires: |
967 | 0 | case OMPD_unknown: |
968 | 0 | default: |
969 | 0 | llvm_unreachable("Unexpected directive."); |
970 | 64 | } |
971 | 64 | } |
972 | | |
973 | 64 | return false; |
974 | 64 | } |
975 | | |
976 | | /// Checks if the construct supports lightweight runtime. It must be SPMD |
977 | | /// construct + inner loop-based construct with static scheduling. |
978 | | static bool supportsLightweightRuntime(ASTContext &Ctx, |
979 | 487 | const OMPExecutableDirective &D) { |
980 | 487 | if (!supportsSPMDExecutionMode(Ctx, D)) |
981 | 0 | return false; |
982 | 487 | OpenMPDirectiveKind DirectiveKind = D.getDirectiveKind(); |
983 | 487 | switch (DirectiveKind) { |
984 | 72 | case OMPD_target: |
985 | 133 | case OMPD_target_teams: |
986 | 218 | case OMPD_target_parallel: |
987 | 218 | return hasNestedLightweightDirective(Ctx, D); |
988 | 24 | case OMPD_target_parallel_for: |
989 | 24 | case OMPD_target_parallel_for_simd: |
990 | 151 | case OMPD_target_teams_distribute_parallel_for: |
991 | 220 | case OMPD_target_teams_distribute_parallel_for_simd: |
992 | | // (Last|First)-privates must be shared in parallel region. |
993 | 220 | return hasStaticScheduling(D); |
994 | 25 | case OMPD_target_simd: |
995 | 49 | case OMPD_target_teams_distribute_simd: |
996 | 49 | return true; |
997 | 0 | case OMPD_target_teams_distribute: |
998 | 0 | return false; |
999 | 0 | case OMPD_parallel: |
1000 | 0 | case OMPD_for: |
1001 | 0 | case OMPD_parallel_for: |
1002 | 0 | case OMPD_parallel_master: |
1003 | 0 | case OMPD_parallel_sections: |
1004 | 0 | case OMPD_for_simd: |
1005 | 0 | case OMPD_parallel_for_simd: |
1006 | 0 | case OMPD_cancel: |
1007 | 0 | case OMPD_cancellation_point: |
1008 | 0 | case OMPD_ordered: |
1009 | 0 | case OMPD_threadprivate: |
1010 | 0 | case OMPD_allocate: |
1011 | 0 | case OMPD_task: |
1012 | 0 | case OMPD_simd: |
1013 | 0 | case OMPD_sections: |
1014 | 0 | case OMPD_section: |
1015 | 0 | case OMPD_single: |
1016 | 0 | case OMPD_master: |
1017 | 0 | case OMPD_critical: |
1018 | 0 | case OMPD_taskyield: |
1019 | 0 | case OMPD_barrier: |
1020 | 0 | case OMPD_taskwait: |
1021 | 0 | case OMPD_taskgroup: |
1022 | 0 | case OMPD_atomic: |
1023 | 0 | case OMPD_flush: |
1024 | 0 | case OMPD_depobj: |
1025 | 0 | case OMPD_scan: |
1026 | 0 | case OMPD_teams: |
1027 | 0 | case OMPD_target_data: |
1028 | 0 | case OMPD_target_exit_data: |
1029 | 0 | case OMPD_target_enter_data: |
1030 | 0 | case OMPD_distribute: |
1031 | 0 | case OMPD_distribute_simd: |
1032 | 0 | case OMPD_distribute_parallel_for: |
1033 | 0 | case OMPD_distribute_parallel_for_simd: |
1034 | 0 | case OMPD_teams_distribute: |
1035 | 0 | case OMPD_teams_distribute_simd: |
1036 | 0 | case OMPD_teams_distribute_parallel_for: |
1037 | 0 | case OMPD_teams_distribute_parallel_for_simd: |
1038 | 0 | case OMPD_target_update: |
1039 | 0 | case OMPD_declare_simd: |
1040 | 0 | case OMPD_declare_variant: |
1041 | 0 | case OMPD_begin_declare_variant: |
1042 | 0 | case OMPD_end_declare_variant: |
1043 | 0 | case OMPD_declare_target: |
1044 | 0 | case OMPD_end_declare_target: |
1045 | 0 | case OMPD_declare_reduction: |
1046 | 0 | case OMPD_declare_mapper: |
1047 | 0 | case OMPD_taskloop: |
1048 | 0 | case OMPD_taskloop_simd: |
1049 | 0 | case OMPD_master_taskloop: |
1050 | 0 | case OMPD_master_taskloop_simd: |
1051 | 0 | case OMPD_parallel_master_taskloop: |
1052 | 0 | case OMPD_parallel_master_taskloop_simd: |
1053 | 0 | case OMPD_requires: |
1054 | 0 | case OMPD_unknown: |
1055 | 0 | default: |
1056 | 0 | break; |
1057 | 0 | } |
1058 | 0 | llvm_unreachable( |
1059 | 0 | "Unknown programming model for OpenMP directive on NVPTX target."); |
1060 | 0 | } |
1061 | | |
1062 | | void CGOpenMPRuntimeGPU::emitNonSPMDKernel(const OMPExecutableDirective &D, |
1063 | | StringRef ParentName, |
1064 | | llvm::Function *&OutlinedFn, |
1065 | | llvm::Constant *&OutlinedFnID, |
1066 | | bool IsOffloadEntry, |
1067 | 195 | const RegionCodeGenTy &CodeGen) { |
1068 | 195 | ExecutionRuntimeModesRAII ModeRAII(CurrentExecutionMode); |
1069 | 195 | EntryFunctionState EST; |
1070 | 195 | WorkerFunctionState WST(CGM, D.getBeginLoc()); |
1071 | 195 | Work.clear(); |
1072 | 195 | WrapperFunctionsMap.clear(); |
1073 | | |
1074 | | // Emit target region as a standalone region. |
1075 | 195 | class NVPTXPrePostActionTy : public PrePostActionTy { |
1076 | 195 | CGOpenMPRuntimeGPU::EntryFunctionState &EST; |
1077 | 195 | CGOpenMPRuntimeGPU::WorkerFunctionState &WST; |
1078 | | |
1079 | 195 | public: |
1080 | 195 | NVPTXPrePostActionTy(CGOpenMPRuntimeGPU::EntryFunctionState &EST, |
1081 | 195 | CGOpenMPRuntimeGPU::WorkerFunctionState &WST) |
1082 | 195 | : EST(EST), WST(WST) {} |
1083 | 195 | void Enter(CodeGenFunction &CGF) override { |
1084 | 195 | auto &RT = |
1085 | 195 | static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
1086 | 195 | RT.emitNonSPMDEntryHeader(CGF, EST, WST); |
1087 | | // Skip target region initialization. |
1088 | 195 | RT.setLocThreadIdInsertPt(CGF, /*AtCurrentPoint=*/true); |
1089 | 195 | } |
1090 | 195 | void Exit(CodeGenFunction &CGF) override { |
1091 | 195 | auto &RT = |
1092 | 195 | static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
1093 | 195 | RT.clearLocThreadIdInsertPt(CGF); |
1094 | 195 | RT.emitNonSPMDEntryFooter(CGF, EST); |
1095 | 195 | } |
1096 | 195 | } Action(EST, WST); |
1097 | 195 | CodeGen.setAction(Action); |
1098 | 195 | IsInTTDRegion = true; |
1099 | | // Reserve place for the globalized memory. |
1100 | 195 | GlobalizedRecords.emplace_back(); |
1101 | 195 | if (!KernelStaticGlobalized) { |
1102 | 102 | KernelStaticGlobalized = new llvm::GlobalVariable( |
1103 | 102 | CGM.getModule(), CGM.VoidPtrTy, /*isConstant=*/false, |
1104 | 102 | llvm::GlobalValue::InternalLinkage, |
1105 | 102 | llvm::UndefValue::get(CGM.VoidPtrTy), |
1106 | 102 | "_openmp_kernel_static_glob_rd$ptr", /*InsertBefore=*/nullptr, |
1107 | 102 | llvm::GlobalValue::NotThreadLocal, |
1108 | 102 | CGM.getContext().getTargetAddressSpace(LangAS::cuda_shared)); |
1109 | 102 | } |
1110 | 195 | emitTargetOutlinedFunctionHelper(D, ParentName, OutlinedFn, OutlinedFnID, |
1111 | 195 | IsOffloadEntry, CodeGen); |
1112 | 195 | IsInTTDRegion = false; |
1113 | | |
1114 | | // Now change the name of the worker function to correspond to this target |
1115 | | // region's entry function. |
1116 | 195 | WST.WorkerFn->setName(Twine(OutlinedFn->getName(), "_worker")); |
1117 | | |
1118 | | // Create the worker function |
1119 | 195 | emitWorkerFunction(WST); |
1120 | 195 | } |
1121 | | |
1122 | | // Setup NVPTX threads for master-worker OpenMP scheme. |
1123 | | void CGOpenMPRuntimeGPU::emitNonSPMDEntryHeader(CodeGenFunction &CGF, |
1124 | | EntryFunctionState &EST, |
1125 | 195 | WorkerFunctionState &WST) { |
1126 | 195 | CGBuilderTy &Bld = CGF.Builder; |
1127 | | |
1128 | 195 | llvm::BasicBlock *WorkerBB = CGF.createBasicBlock(".worker"); |
1129 | 195 | llvm::BasicBlock *MasterCheckBB = CGF.createBasicBlock(".mastercheck"); |
1130 | 195 | llvm::BasicBlock *MasterBB = CGF.createBasicBlock(".master"); |
1131 | 195 | EST.ExitBB = CGF.createBasicBlock(".exit"); |
1132 | | |
1133 | 195 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
1134 | 195 | llvm::Value *IsWorker = |
1135 | 195 | Bld.CreateICmpULT(RT.getGPUThreadID(CGF), getThreadLimit(CGF)); |
1136 | 195 | Bld.CreateCondBr(IsWorker, WorkerBB, MasterCheckBB); |
1137 | | |
1138 | 195 | CGF.EmitBlock(WorkerBB); |
1139 | 195 | emitCall(CGF, WST.Loc, WST.WorkerFn); |
1140 | 195 | CGF.EmitBranch(EST.ExitBB); |
1141 | | |
1142 | 195 | CGF.EmitBlock(MasterCheckBB); |
1143 | 195 | llvm::Value *IsMaster = |
1144 | 195 | Bld.CreateICmpEQ(RT.getGPUThreadID(CGF), getMasterThreadID(CGF)); |
1145 | 195 | Bld.CreateCondBr(IsMaster, MasterBB, EST.ExitBB); |
1146 | | |
1147 | 195 | CGF.EmitBlock(MasterBB); |
1148 | 195 | IsInTargetMasterThreadRegion = true; |
1149 | | // SEQUENTIAL (MASTER) REGION START |
1150 | | // First action in sequential region: |
1151 | | // Initialize the state of the OpenMP runtime library on the GPU. |
1152 | | // TODO: Optimize runtime initialization and pass in correct value. |
1153 | 195 | llvm::Value *Args[] = {getThreadLimit(CGF), |
1154 | 195 | Bld.getInt16(/*RequiresOMPRuntime=*/1)}; |
1155 | 195 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1156 | 195 | CGM.getModule(), OMPRTL___kmpc_kernel_init), |
1157 | 195 | Args); |
1158 | | |
1159 | | // For data sharing, we need to initialize the stack. |
1160 | 195 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1161 | 195 | CGM.getModule(), OMPRTL___kmpc_data_sharing_init_stack)); |
1162 | | |
1163 | 195 | emitGenericVarsProlog(CGF, WST.Loc); |
1164 | 195 | } |
1165 | | |
1166 | | void CGOpenMPRuntimeGPU::emitNonSPMDEntryFooter(CodeGenFunction &CGF, |
1167 | 195 | EntryFunctionState &EST) { |
1168 | 195 | IsInTargetMasterThreadRegion = false; |
1169 | 195 | if (!CGF.HaveInsertPoint()) |
1170 | 0 | return; |
1171 | | |
1172 | 195 | emitGenericVarsEpilog(CGF); |
1173 | | |
1174 | 195 | if (!EST.ExitBB) |
1175 | 0 | EST.ExitBB = CGF.createBasicBlock(".exit"); |
1176 | | |
1177 | 195 | llvm::BasicBlock *TerminateBB = CGF.createBasicBlock(".termination.notifier"); |
1178 | 195 | CGF.EmitBranch(TerminateBB); |
1179 | | |
1180 | 195 | CGF.EmitBlock(TerminateBB); |
1181 | | // Signal termination condition. |
1182 | | // TODO: Optimize runtime initialization and pass in correct value. |
1183 | 195 | llvm::Value *Args[] = {CGF.Builder.getInt16(/*IsOMPRuntimeInitialized=*/1)}; |
1184 | 195 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1185 | 195 | CGM.getModule(), OMPRTL___kmpc_kernel_deinit), |
1186 | 195 | Args); |
1187 | | // Barrier to terminate worker threads. |
1188 | 195 | syncCTAThreads(CGF); |
1189 | | // Master thread jumps to exit point. |
1190 | 195 | CGF.EmitBranch(EST.ExitBB); |
1191 | | |
1192 | 195 | CGF.EmitBlock(EST.ExitBB); |
1193 | 195 | EST.ExitBB = nullptr; |
1194 | 195 | } |
1195 | | |
1196 | | void CGOpenMPRuntimeGPU::emitSPMDKernel(const OMPExecutableDirective &D, |
1197 | | StringRef ParentName, |
1198 | | llvm::Function *&OutlinedFn, |
1199 | | llvm::Constant *&OutlinedFnID, |
1200 | | bool IsOffloadEntry, |
1201 | 676 | const RegionCodeGenTy &CodeGen) { |
1202 | 676 | ExecutionRuntimeModesRAII ModeRAII( |
1203 | 676 | CurrentExecutionMode, RequiresFullRuntime, |
1204 | 676 | CGM.getLangOpts().OpenMPCUDAForceFullRuntime || |
1205 | 487 | !supportsLightweightRuntime(CGM.getContext(), D)); |
1206 | 676 | EntryFunctionState EST; |
1207 | | |
1208 | | // Emit target region as a standalone region. |
1209 | 676 | class NVPTXPrePostActionTy : public PrePostActionTy { |
1210 | 676 | CGOpenMPRuntimeGPU &RT; |
1211 | 676 | CGOpenMPRuntimeGPU::EntryFunctionState &EST; |
1212 | 676 | const OMPExecutableDirective &D; |
1213 | | |
1214 | 676 | public: |
1215 | 676 | NVPTXPrePostActionTy(CGOpenMPRuntimeGPU &RT, |
1216 | 676 | CGOpenMPRuntimeGPU::EntryFunctionState &EST, |
1217 | 676 | const OMPExecutableDirective &D) |
1218 | 676 | : RT(RT), EST(EST), D(D) {} |
1219 | 676 | void Enter(CodeGenFunction &CGF) override { |
1220 | 676 | RT.emitSPMDEntryHeader(CGF, EST, D); |
1221 | | // Skip target region initialization. |
1222 | 676 | RT.setLocThreadIdInsertPt(CGF, /*AtCurrentPoint=*/true); |
1223 | 676 | } |
1224 | 676 | void Exit(CodeGenFunction &CGF) override { |
1225 | 676 | RT.clearLocThreadIdInsertPt(CGF); |
1226 | 676 | RT.emitSPMDEntryFooter(CGF, EST); |
1227 | 676 | } |
1228 | 676 | } Action(*this, EST, D); |
1229 | 676 | CodeGen.setAction(Action); |
1230 | 676 | IsInTTDRegion = true; |
1231 | | // Reserve place for the globalized memory. |
1232 | 676 | GlobalizedRecords.emplace_back(); |
1233 | 676 | if (!KernelStaticGlobalized) { |
1234 | 91 | KernelStaticGlobalized = new llvm::GlobalVariable( |
1235 | 91 | CGM.getModule(), CGM.VoidPtrTy, /*isConstant=*/false, |
1236 | 91 | llvm::GlobalValue::InternalLinkage, |
1237 | 91 | llvm::UndefValue::get(CGM.VoidPtrTy), |
1238 | 91 | "_openmp_kernel_static_glob_rd$ptr", /*InsertBefore=*/nullptr, |
1239 | 91 | llvm::GlobalValue::NotThreadLocal, |
1240 | 91 | CGM.getContext().getTargetAddressSpace(LangAS::cuda_shared)); |
1241 | 91 | } |
1242 | 676 | emitTargetOutlinedFunctionHelper(D, ParentName, OutlinedFn, OutlinedFnID, |
1243 | 676 | IsOffloadEntry, CodeGen); |
1244 | 676 | IsInTTDRegion = false; |
1245 | 676 | } |
1246 | | |
1247 | | void CGOpenMPRuntimeGPU::emitSPMDEntryHeader( |
1248 | | CodeGenFunction &CGF, EntryFunctionState &EST, |
1249 | 676 | const OMPExecutableDirective &D) { |
1250 | 676 | CGBuilderTy &Bld = CGF.Builder; |
1251 | | |
1252 | | // Setup BBs in entry function. |
1253 | 676 | llvm::BasicBlock *ExecuteBB = CGF.createBasicBlock(".execute"); |
1254 | 676 | EST.ExitBB = CGF.createBasicBlock(".exit"); |
1255 | | |
1256 | 676 | llvm::Value *Args[] = {getThreadLimit(CGF, /*IsInSPMDExecutionMode=*/true), |
1257 | | /*RequiresOMPRuntime=*/ |
1258 | 380 | Bld.getInt16(RequiresFullRuntime ? 1 : 0296 )}; |
1259 | 676 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1260 | 676 | CGM.getModule(), OMPRTL___kmpc_spmd_kernel_init), |
1261 | 676 | Args); |
1262 | | |
1263 | 676 | if (RequiresFullRuntime) { |
1264 | | // For data sharing, we need to initialize the stack. |
1265 | 380 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1266 | 380 | CGM.getModule(), OMPRTL___kmpc_data_sharing_init_stack_spmd)); |
1267 | 380 | } |
1268 | | |
1269 | 676 | CGF.EmitBranch(ExecuteBB); |
1270 | | |
1271 | 676 | CGF.EmitBlock(ExecuteBB); |
1272 | | |
1273 | 676 | IsInTargetMasterThreadRegion = true; |
1274 | 676 | } |
1275 | | |
1276 | | void CGOpenMPRuntimeGPU::emitSPMDEntryFooter(CodeGenFunction &CGF, |
1277 | 676 | EntryFunctionState &EST) { |
1278 | 676 | IsInTargetMasterThreadRegion = false; |
1279 | 676 | if (!CGF.HaveInsertPoint()) |
1280 | 0 | return; |
1281 | | |
1282 | 676 | if (!EST.ExitBB) |
1283 | 0 | EST.ExitBB = CGF.createBasicBlock(".exit"); |
1284 | | |
1285 | 676 | llvm::BasicBlock *OMPDeInitBB = CGF.createBasicBlock(".omp.deinit"); |
1286 | 676 | CGF.EmitBranch(OMPDeInitBB); |
1287 | | |
1288 | 676 | CGF.EmitBlock(OMPDeInitBB); |
1289 | | // DeInitialize the OMP state in the runtime; called by all active threads. |
1290 | 676 | llvm::Value *Args[] = {/*RequiresOMPRuntime=*/ |
1291 | 380 | CGF.Builder.getInt16(RequiresFullRuntime ? 1 : 0296 )}; |
1292 | 676 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1293 | 676 | CGM.getModule(), OMPRTL___kmpc_spmd_kernel_deinit_v2), |
1294 | 676 | Args); |
1295 | 676 | CGF.EmitBranch(EST.ExitBB); |
1296 | | |
1297 | 676 | CGF.EmitBlock(EST.ExitBB); |
1298 | 676 | EST.ExitBB = nullptr; |
1299 | 676 | } |
1300 | | |
1301 | | // Create a unique global variable to indicate the execution mode of this target |
1302 | | // region. The execution mode is either 'generic', or 'spmd' depending on the |
1303 | | // target directive. This variable is picked up by the offload library to setup |
1304 | | // the device appropriately before kernel launch. If the execution mode is |
1305 | | // 'generic', the runtime reserves one warp for the master, otherwise, all |
1306 | | // warps participate in parallel work. |
1307 | | static void setPropertyExecutionMode(CodeGenModule &CGM, StringRef Name, |
1308 | 871 | bool Mode) { |
1309 | 871 | auto *GVMode = |
1310 | 871 | new llvm::GlobalVariable(CGM.getModule(), CGM.Int8Ty, /*isConstant=*/true, |
1311 | 871 | llvm::GlobalValue::WeakAnyLinkage, |
1312 | 676 | llvm::ConstantInt::get(CGM.Int8Ty, Mode ? 0 : 1195 ), |
1313 | 871 | Twine(Name, "_exec_mode")); |
1314 | 871 | CGM.addCompilerUsedGlobal(GVMode); |
1315 | 871 | } |
1316 | | |
1317 | 195 | void CGOpenMPRuntimeGPU::emitWorkerFunction(WorkerFunctionState &WST) { |
1318 | 195 | ASTContext &Ctx = CGM.getContext(); |
1319 | | |
1320 | 195 | CodeGenFunction CGF(CGM, /*suppressNewContext=*/true); |
1321 | 195 | CGF.StartFunction(GlobalDecl(), Ctx.VoidTy, WST.WorkerFn, WST.CGFI, {}, |
1322 | 195 | WST.Loc, WST.Loc); |
1323 | 195 | emitWorkerLoop(CGF, WST); |
1324 | 195 | CGF.FinishFunction(); |
1325 | 195 | } |
1326 | | |
1327 | | void CGOpenMPRuntimeGPU::emitWorkerLoop(CodeGenFunction &CGF, |
1328 | 195 | WorkerFunctionState &WST) { |
1329 | | // |
1330 | | // The workers enter this loop and wait for parallel work from the master. |
1331 | | // When the master encounters a parallel region it sets up the work + variable |
1332 | | // arguments, and wakes up the workers. The workers first check to see if |
1333 | | // they are required for the parallel region, i.e., within the # of requested |
1334 | | // parallel threads. The activated workers load the variable arguments and |
1335 | | // execute the parallel work. |
1336 | | // |
1337 | | |
1338 | 195 | CGBuilderTy &Bld = CGF.Builder; |
1339 | | |
1340 | 195 | llvm::BasicBlock *AwaitBB = CGF.createBasicBlock(".await.work"); |
1341 | 195 | llvm::BasicBlock *SelectWorkersBB = CGF.createBasicBlock(".select.workers"); |
1342 | 195 | llvm::BasicBlock *ExecuteBB = CGF.createBasicBlock(".execute.parallel"); |
1343 | 195 | llvm::BasicBlock *TerminateBB = CGF.createBasicBlock(".terminate.parallel"); |
1344 | 195 | llvm::BasicBlock *BarrierBB = CGF.createBasicBlock(".barrier.parallel"); |
1345 | 195 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".exit"); |
1346 | | |
1347 | 195 | CGF.EmitBranch(AwaitBB); |
1348 | | |
1349 | | // Workers wait for work from master. |
1350 | 195 | CGF.EmitBlock(AwaitBB); |
1351 | | // Wait for parallel work |
1352 | 195 | syncCTAThreads(CGF); |
1353 | | |
1354 | 195 | Address WorkFn = |
1355 | 195 | CGF.CreateDefaultAlignTempAlloca(CGF.Int8PtrTy, /*Name=*/"work_fn"); |
1356 | 195 | Address ExecStatus = |
1357 | 195 | CGF.CreateDefaultAlignTempAlloca(CGF.Int8Ty, /*Name=*/"exec_status"); |
1358 | 195 | CGF.InitTempAlloca(ExecStatus, Bld.getInt8(/*C=*/0)); |
1359 | 195 | CGF.InitTempAlloca(WorkFn, llvm::Constant::getNullValue(CGF.Int8PtrTy)); |
1360 | | |
1361 | | // TODO: Optimize runtime initialization and pass in correct value. |
1362 | 195 | llvm::Value *Args[] = {WorkFn.getPointer()}; |
1363 | 195 | llvm::Value *Ret = |
1364 | 195 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1365 | 195 | CGM.getModule(), OMPRTL___kmpc_kernel_parallel), |
1366 | 195 | Args); |
1367 | 195 | Bld.CreateStore(Bld.CreateZExt(Ret, CGF.Int8Ty), ExecStatus); |
1368 | | |
1369 | | // On termination condition (workid == 0), exit loop. |
1370 | 195 | llvm::Value *WorkID = Bld.CreateLoad(WorkFn); |
1371 | 195 | llvm::Value *ShouldTerminate = Bld.CreateIsNull(WorkID, "should_terminate"); |
1372 | 195 | Bld.CreateCondBr(ShouldTerminate, ExitBB, SelectWorkersBB); |
1373 | | |
1374 | | // Activate requested workers. |
1375 | 195 | CGF.EmitBlock(SelectWorkersBB); |
1376 | 195 | llvm::Value *IsActive = |
1377 | 195 | Bld.CreateIsNotNull(Bld.CreateLoad(ExecStatus), "is_active"); |
1378 | 195 | Bld.CreateCondBr(IsActive, ExecuteBB, BarrierBB); |
1379 | | |
1380 | | // Signal start of parallel region. |
1381 | 195 | CGF.EmitBlock(ExecuteBB); |
1382 | | // Skip initialization. |
1383 | 195 | setLocThreadIdInsertPt(CGF, /*AtCurrentPoint=*/true); |
1384 | | |
1385 | | // Process work items: outlined parallel functions. |
1386 | 64 | for (llvm::Function *W : Work) { |
1387 | | // Try to match this outlined function. |
1388 | 64 | llvm::Value *ID = Bld.CreatePointerBitCastOrAddrSpaceCast(W, CGM.Int8PtrTy); |
1389 | | |
1390 | 64 | llvm::Value *WorkFnMatch = |
1391 | 64 | Bld.CreateICmpEQ(Bld.CreateLoad(WorkFn), ID, "work_match"); |
1392 | | |
1393 | 64 | llvm::BasicBlock *ExecuteFNBB = CGF.createBasicBlock(".execute.fn"); |
1394 | 64 | llvm::BasicBlock *CheckNextBB = CGF.createBasicBlock(".check.next"); |
1395 | 64 | Bld.CreateCondBr(WorkFnMatch, ExecuteFNBB, CheckNextBB); |
1396 | | |
1397 | | // Execute this outlined function. |
1398 | 64 | CGF.EmitBlock(ExecuteFNBB); |
1399 | | |
1400 | | // Insert call to work function via shared wrapper. The shared |
1401 | | // wrapper takes two arguments: |
1402 | | // - the parallelism level; |
1403 | | // - the thread ID; |
1404 | 64 | emitCall(CGF, WST.Loc, W, |
1405 | 64 | {Bld.getInt16(/*ParallelLevel=*/0), getThreadID(CGF, WST.Loc)}); |
1406 | | |
1407 | | // Go to end of parallel region. |
1408 | 64 | CGF.EmitBranch(TerminateBB); |
1409 | | |
1410 | 64 | CGF.EmitBlock(CheckNextBB); |
1411 | 64 | } |
1412 | | // Default case: call to outlined function through pointer if the target |
1413 | | // region makes a declare target call that may contain an orphaned parallel |
1414 | | // directive. |
1415 | 195 | auto *ParallelFnTy = |
1416 | 195 | llvm::FunctionType::get(CGM.VoidTy, {CGM.Int16Ty, CGM.Int32Ty}, |
1417 | 195 | /*isVarArg=*/false); |
1418 | 195 | llvm::Value *WorkFnCast = |
1419 | 195 | Bld.CreateBitCast(WorkID, ParallelFnTy->getPointerTo()); |
1420 | | // Insert call to work function via shared wrapper. The shared |
1421 | | // wrapper takes two arguments: |
1422 | | // - the parallelism level; |
1423 | | // - the thread ID; |
1424 | 195 | emitCall(CGF, WST.Loc, {ParallelFnTy, WorkFnCast}, |
1425 | 195 | {Bld.getInt16(/*ParallelLevel=*/0), getThreadID(CGF, WST.Loc)}); |
1426 | | // Go to end of parallel region. |
1427 | 195 | CGF.EmitBranch(TerminateBB); |
1428 | | |
1429 | | // Signal end of parallel region. |
1430 | 195 | CGF.EmitBlock(TerminateBB); |
1431 | 195 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1432 | 195 | CGM.getModule(), OMPRTL___kmpc_kernel_end_parallel), |
1433 | 195 | llvm::None); |
1434 | 195 | CGF.EmitBranch(BarrierBB); |
1435 | | |
1436 | | // All active and inactive workers wait at a barrier after parallel region. |
1437 | 195 | CGF.EmitBlock(BarrierBB); |
1438 | | // Barrier after parallel region. |
1439 | 195 | syncCTAThreads(CGF); |
1440 | 195 | CGF.EmitBranch(AwaitBB); |
1441 | | |
1442 | | // Exit target region. |
1443 | 195 | CGF.EmitBlock(ExitBB); |
1444 | | // Skip initialization. |
1445 | 195 | clearLocThreadIdInsertPt(CGF); |
1446 | 195 | } |
1447 | | |
1448 | | void CGOpenMPRuntimeGPU::createOffloadEntry(llvm::Constant *ID, |
1449 | | llvm::Constant *Addr, |
1450 | | uint64_t Size, int32_t, |
1451 | 976 | llvm::GlobalValue::LinkageTypes) { |
1452 | | // TODO: Add support for global variables on the device after declare target |
1453 | | // support. |
1454 | 976 | if (!isa<llvm::Function>(Addr)) |
1455 | 43 | return; |
1456 | 933 | llvm::Module &M = CGM.getModule(); |
1457 | 933 | llvm::LLVMContext &Ctx = CGM.getLLVMContext(); |
1458 | | |
1459 | | // Get "nvvm.annotations" metadata node |
1460 | 933 | llvm::NamedMDNode *MD = M.getOrInsertNamedMetadata("nvvm.annotations"); |
1461 | | |
1462 | 933 | llvm::Metadata *MDVals[] = { |
1463 | 933 | llvm::ConstantAsMetadata::get(Addr), llvm::MDString::get(Ctx, "kernel"), |
1464 | 933 | llvm::ConstantAsMetadata::get( |
1465 | 933 | llvm::ConstantInt::get(llvm::Type::getInt32Ty(Ctx), 1))}; |
1466 | | // Append metadata to nvvm.annotations |
1467 | 933 | MD->addOperand(llvm::MDNode::get(Ctx, MDVals)); |
1468 | 933 | } |
1469 | | |
1470 | | void CGOpenMPRuntimeGPU::emitTargetOutlinedFunction( |
1471 | | const OMPExecutableDirective &D, StringRef ParentName, |
1472 | | llvm::Function *&OutlinedFn, llvm::Constant *&OutlinedFnID, |
1473 | 871 | bool IsOffloadEntry, const RegionCodeGenTy &CodeGen) { |
1474 | 871 | if (!IsOffloadEntry) // Nothing to do. |
1475 | 0 | return; |
1476 | | |
1477 | 871 | assert(!ParentName.empty() && "Invalid target region parent name!"); |
1478 | | |
1479 | 871 | bool Mode = supportsSPMDExecutionMode(CGM.getContext(), D); |
1480 | 871 | if (Mode) |
1481 | 676 | emitSPMDKernel(D, ParentName, OutlinedFn, OutlinedFnID, IsOffloadEntry, |
1482 | 676 | CodeGen); |
1483 | 195 | else |
1484 | 195 | emitNonSPMDKernel(D, ParentName, OutlinedFn, OutlinedFnID, IsOffloadEntry, |
1485 | 195 | CodeGen); |
1486 | | |
1487 | 871 | setPropertyExecutionMode(CGM, OutlinedFn->getName(), Mode); |
1488 | 871 | } |
1489 | | |
1490 | | namespace { |
1491 | | LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE(); |
1492 | | /// Enum for accesseing the reserved_2 field of the ident_t struct. |
1493 | | enum ModeFlagsTy : unsigned { |
1494 | | /// Bit set to 1 when in SPMD mode. |
1495 | | KMP_IDENT_SPMD_MODE = 0x01, |
1496 | | /// Bit set to 1 when a simplified runtime is used. |
1497 | | KMP_IDENT_SIMPLE_RT_MODE = 0x02, |
1498 | | LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue=*/KMP_IDENT_SIMPLE_RT_MODE) |
1499 | | }; |
1500 | | |
1501 | | /// Special mode Undefined. Is the combination of Non-SPMD mode + SimpleRuntime. |
1502 | | static const ModeFlagsTy UndefinedMode = |
1503 | | (~KMP_IDENT_SPMD_MODE) & KMP_IDENT_SIMPLE_RT_MODE; |
1504 | | } // anonymous namespace |
1505 | | |
1506 | 3.21k | unsigned CGOpenMPRuntimeGPU::getDefaultLocationReserved2Flags() const { |
1507 | 3.21k | switch (getExecutionMode()) { |
1508 | 2.77k | case EM_SPMD: |
1509 | 2.77k | if (requiresFullRuntime()) |
1510 | 1.50k | return KMP_IDENT_SPMD_MODE & (~KMP_IDENT_SIMPLE_RT_MODE); |
1511 | 1.26k | return KMP_IDENT_SPMD_MODE | KMP_IDENT_SIMPLE_RT_MODE; |
1512 | 413 | case EM_NonSPMD: |
1513 | 413 | assert(requiresFullRuntime() && "Expected full runtime."); |
1514 | 413 | return (~KMP_IDENT_SPMD_MODE) & (~KMP_IDENT_SIMPLE_RT_MODE); |
1515 | 29 | case EM_Unknown: |
1516 | 29 | return UndefinedMode; |
1517 | 0 | } |
1518 | 0 | llvm_unreachable("Unknown flags are requested."); |
1519 | 0 | } |
1520 | | |
1521 | | CGOpenMPRuntimeGPU::CGOpenMPRuntimeGPU(CodeGenModule &CGM) |
1522 | 216 | : CGOpenMPRuntime(CGM, "_", "$") { |
1523 | 216 | if (!CGM.getLangOpts().OpenMPIsDevice) |
1524 | 0 | llvm_unreachable("OpenMP NVPTX can only handle device code."); |
1525 | 216 | } |
1526 | | |
1527 | | void CGOpenMPRuntimeGPU::emitProcBindClause(CodeGenFunction &CGF, |
1528 | | ProcBindKind ProcBind, |
1529 | 46 | SourceLocation Loc) { |
1530 | | // Do nothing in case of SPMD mode and L0 parallel. |
1531 | 46 | if (getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD) |
1532 | 46 | return; |
1533 | | |
1534 | 0 | CGOpenMPRuntime::emitProcBindClause(CGF, ProcBind, Loc); |
1535 | 0 | } |
1536 | | |
1537 | | void CGOpenMPRuntimeGPU::emitNumThreadsClause(CodeGenFunction &CGF, |
1538 | | llvm::Value *NumThreads, |
1539 | 15 | SourceLocation Loc) { |
1540 | | // Do nothing in case of SPMD mode and L0 parallel. |
1541 | 15 | if (getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD) |
1542 | 15 | return; |
1543 | | |
1544 | 0 | CGOpenMPRuntime::emitNumThreadsClause(CGF, NumThreads, Loc); |
1545 | 0 | } |
1546 | | |
1547 | | void CGOpenMPRuntimeGPU::emitNumTeamsClause(CodeGenFunction &CGF, |
1548 | | const Expr *NumTeams, |
1549 | | const Expr *ThreadLimit, |
1550 | 42 | SourceLocation Loc) {} |
1551 | | |
1552 | | llvm::Function *CGOpenMPRuntimeGPU::emitParallelOutlinedFunction( |
1553 | | const OMPExecutableDirective &D, const VarDecl *ThreadIDVar, |
1554 | 707 | OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) { |
1555 | | // Emit target region as a standalone region. |
1556 | 707 | class NVPTXPrePostActionTy : public PrePostActionTy { |
1557 | 707 | bool &IsInParallelRegion; |
1558 | 707 | bool PrevIsInParallelRegion; |
1559 | | |
1560 | 707 | public: |
1561 | 707 | NVPTXPrePostActionTy(bool &IsInParallelRegion) |
1562 | 707 | : IsInParallelRegion(IsInParallelRegion) {} |
1563 | 707 | void Enter(CodeGenFunction &CGF) override { |
1564 | 707 | PrevIsInParallelRegion = IsInParallelRegion; |
1565 | 707 | IsInParallelRegion = true; |
1566 | 707 | } |
1567 | 707 | void Exit(CodeGenFunction &CGF) override { |
1568 | 707 | IsInParallelRegion = PrevIsInParallelRegion; |
1569 | 707 | } |
1570 | 707 | } Action(IsInParallelRegion); |
1571 | 707 | CodeGen.setAction(Action); |
1572 | 707 | bool PrevIsInTTDRegion = IsInTTDRegion; |
1573 | 707 | IsInTTDRegion = false; |
1574 | 707 | bool PrevIsInTargetMasterThreadRegion = IsInTargetMasterThreadRegion; |
1575 | 707 | IsInTargetMasterThreadRegion = false; |
1576 | 707 | auto *OutlinedFun = |
1577 | 707 | cast<llvm::Function>(CGOpenMPRuntime::emitParallelOutlinedFunction( |
1578 | 707 | D, ThreadIDVar, InnermostKind, CodeGen)); |
1579 | 707 | if (CGM.getLangOpts().Optimize) { |
1580 | 36 | OutlinedFun->removeFnAttr(llvm::Attribute::NoInline); |
1581 | 36 | OutlinedFun->removeFnAttr(llvm::Attribute::OptimizeNone); |
1582 | 36 | OutlinedFun->addFnAttr(llvm::Attribute::AlwaysInline); |
1583 | 36 | } |
1584 | 707 | IsInTargetMasterThreadRegion = PrevIsInTargetMasterThreadRegion; |
1585 | 707 | IsInTTDRegion = PrevIsInTTDRegion; |
1586 | 707 | if (getExecutionMode() != CGOpenMPRuntimeGPU::EM_SPMD && |
1587 | 74 | !IsInParallelRegion) { |
1588 | 74 | llvm::Function *WrapperFun = |
1589 | 74 | createParallelDataSharingWrapper(OutlinedFun, D); |
1590 | 74 | WrapperFunctionsMap[OutlinedFun] = WrapperFun; |
1591 | 74 | } |
1592 | | |
1593 | 707 | return OutlinedFun; |
1594 | 707 | } |
1595 | | |
1596 | | /// Get list of lastprivate variables from the teams distribute ... or |
1597 | | /// teams {distribute ...} directives. |
1598 | | static void |
1599 | | getDistributeLastprivateVars(ASTContext &Ctx, const OMPExecutableDirective &D, |
1600 | 413 | llvm::SmallVectorImpl<const ValueDecl *> &Vars) { |
1601 | 413 | assert(isOpenMPTeamsDirective(D.getDirectiveKind()) && |
1602 | 413 | "expected teams directive."); |
1603 | 413 | const OMPExecutableDirective *Dir = &D; |
1604 | 413 | if (!isOpenMPDistributeDirective(D.getDirectiveKind())) { |
1605 | 151 | if (const Stmt *S = CGOpenMPRuntime::getSingleCompoundChild( |
1606 | 151 | Ctx, |
1607 | 151 | D.getInnermostCapturedStmt()->getCapturedStmt()->IgnoreContainers( |
1608 | 151 | /*IgnoreCaptured=*/true))) { |
1609 | 151 | Dir = dyn_cast_or_null<OMPExecutableDirective>(S); |
1610 | 151 | if (Dir && !isOpenMPDistributeDirective(Dir->getDirectiveKind())) |
1611 | 13 | Dir = nullptr; |
1612 | 151 | } |
1613 | 151 | } |
1614 | 413 | if (!Dir) |
1615 | 13 | return; |
1616 | 400 | for (const auto *C : Dir->getClausesOfKind<OMPLastprivateClause>()) { |
1617 | 52 | for (const Expr *E : C->getVarRefs()) |
1618 | 52 | Vars.push_back(getPrivateItem(E)); |
1619 | 52 | } |
1620 | 400 | } |
1621 | | |
1622 | | /// Get list of reduction variables from the teams ... directives. |
1623 | | static void |
1624 | | getTeamsReductionVars(ASTContext &Ctx, const OMPExecutableDirective &D, |
1625 | 54 | llvm::SmallVectorImpl<const ValueDecl *> &Vars) { |
1626 | 54 | assert(isOpenMPTeamsDirective(D.getDirectiveKind()) && |
1627 | 54 | "expected teams directive."); |
1628 | 18 | for (const auto *C : D.getClausesOfKind<OMPReductionClause>()) { |
1629 | 18 | for (const Expr *E : C->privates()) |
1630 | 18 | Vars.push_back(getPrivateItem(E)); |
1631 | 18 | } |
1632 | 54 | } |
1633 | | |
1634 | | llvm::Function *CGOpenMPRuntimeGPU::emitTeamsOutlinedFunction( |
1635 | | const OMPExecutableDirective &D, const VarDecl *ThreadIDVar, |
1636 | 467 | OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) { |
1637 | 467 | SourceLocation Loc = D.getBeginLoc(); |
1638 | | |
1639 | 467 | const RecordDecl *GlobalizedRD = nullptr; |
1640 | 467 | llvm::SmallVector<const ValueDecl *, 4> LastPrivatesReductions; |
1641 | 467 | llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> MappedDeclsFields; |
1642 | 467 | unsigned WarpSize = CGM.getTarget().getGridValue(llvm::omp::GV_Warp_Size); |
1643 | | // Globalize team reductions variable unconditionally in all modes. |
1644 | 467 | if (getExecutionMode() != CGOpenMPRuntimeGPU::EM_SPMD) |
1645 | 54 | getTeamsReductionVars(CGM.getContext(), D, LastPrivatesReductions); |
1646 | 467 | if (getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD) { |
1647 | 413 | getDistributeLastprivateVars(CGM.getContext(), D, LastPrivatesReductions); |
1648 | 413 | if (!LastPrivatesReductions.empty()) { |
1649 | 52 | GlobalizedRD = ::buildRecordForGlobalizedVars( |
1650 | 52 | CGM.getContext(), llvm::None, LastPrivatesReductions, |
1651 | 52 | MappedDeclsFields, WarpSize); |
1652 | 52 | } |
1653 | 54 | } else if (!LastPrivatesReductions.empty()) { |
1654 | 12 | assert(!TeamAndReductions.first && |
1655 | 12 | "Previous team declaration is not expected."); |
1656 | 12 | TeamAndReductions.first = D.getCapturedStmt(OMPD_teams)->getCapturedDecl(); |
1657 | 12 | std::swap(TeamAndReductions.second, LastPrivatesReductions); |
1658 | 12 | } |
1659 | | |
1660 | | // Emit target region as a standalone region. |
1661 | 467 | class NVPTXPrePostActionTy : public PrePostActionTy { |
1662 | 467 | SourceLocation &Loc; |
1663 | 467 | const RecordDecl *GlobalizedRD; |
1664 | 467 | llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
1665 | 467 | &MappedDeclsFields; |
1666 | | |
1667 | 467 | public: |
1668 | 467 | NVPTXPrePostActionTy( |
1669 | 467 | SourceLocation &Loc, const RecordDecl *GlobalizedRD, |
1670 | 467 | llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
1671 | 467 | &MappedDeclsFields) |
1672 | 467 | : Loc(Loc), GlobalizedRD(GlobalizedRD), |
1673 | 467 | MappedDeclsFields(MappedDeclsFields) {} |
1674 | 467 | void Enter(CodeGenFunction &CGF) override { |
1675 | 467 | auto &Rt = |
1676 | 467 | static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
1677 | 467 | if (GlobalizedRD) { |
1678 | 52 | auto I = Rt.FunctionGlobalizedDecls.try_emplace(CGF.CurFn).first; |
1679 | 52 | I->getSecond().GlobalRecord = GlobalizedRD; |
1680 | 52 | I->getSecond().MappedParams = |
1681 | 52 | std::make_unique<CodeGenFunction::OMPMapVars>(); |
1682 | 52 | DeclToAddrMapTy &Data = I->getSecond().LocalVarData; |
1683 | 52 | for (const auto &Pair : MappedDeclsFields) { |
1684 | 52 | assert(Pair.getFirst()->isCanonicalDecl() && |
1685 | 52 | "Expected canonical declaration"); |
1686 | 52 | Data.insert(std::make_pair(Pair.getFirst(), |
1687 | 52 | MappedVarData(Pair.getSecond(), |
1688 | 52 | /*IsOnePerTeam=*/true))); |
1689 | 52 | } |
1690 | 52 | } |
1691 | 467 | Rt.emitGenericVarsProlog(CGF, Loc); |
1692 | 467 | } |
1693 | 467 | void Exit(CodeGenFunction &CGF) override { |
1694 | 467 | static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()) |
1695 | 467 | .emitGenericVarsEpilog(CGF); |
1696 | 467 | } |
1697 | 467 | } Action(Loc, GlobalizedRD, MappedDeclsFields); |
1698 | 467 | CodeGen.setAction(Action); |
1699 | 467 | llvm::Function *OutlinedFun = CGOpenMPRuntime::emitTeamsOutlinedFunction( |
1700 | 467 | D, ThreadIDVar, InnermostKind, CodeGen); |
1701 | 467 | if (CGM.getLangOpts().Optimize) { |
1702 | 22 | OutlinedFun->removeFnAttr(llvm::Attribute::NoInline); |
1703 | 22 | OutlinedFun->removeFnAttr(llvm::Attribute::OptimizeNone); |
1704 | 22 | OutlinedFun->addFnAttr(llvm::Attribute::AlwaysInline); |
1705 | 22 | } |
1706 | | |
1707 | 467 | return OutlinedFun; |
1708 | 467 | } |
1709 | | |
1710 | | void CGOpenMPRuntimeGPU::emitGenericVarsProlog(CodeGenFunction &CGF, |
1711 | | SourceLocation Loc, |
1712 | 673 | bool WithSPMDCheck) { |
1713 | 673 | if (getDataSharingMode(CGM) != CGOpenMPRuntimeGPU::Generic && |
1714 | 170 | getExecutionMode() != CGOpenMPRuntimeGPU::EM_SPMD) |
1715 | 2 | return; |
1716 | | |
1717 | 671 | CGBuilderTy &Bld = CGF.Builder; |
1718 | | |
1719 | 671 | const auto I = FunctionGlobalizedDecls.find(CGF.CurFn); |
1720 | 671 | if (I == FunctionGlobalizedDecls.end()) |
1721 | 535 | return; |
1722 | 136 | if (const RecordDecl *GlobalizedVarsRecord = I->getSecond().GlobalRecord) { |
1723 | 136 | QualType GlobalRecTy = CGM.getContext().getRecordType(GlobalizedVarsRecord); |
1724 | 136 | QualType SecGlobalRecTy; |
1725 | | |
1726 | | // Recover pointer to this function's global record. The runtime will |
1727 | | // handle the specifics of the allocation of the memory. |
1728 | | // Use actual memory size of the record including the padding |
1729 | | // for alignment purposes. |
1730 | 136 | unsigned Alignment = |
1731 | 136 | CGM.getContext().getTypeAlignInChars(GlobalRecTy).getQuantity(); |
1732 | 136 | unsigned GlobalRecordSize = |
1733 | 136 | CGM.getContext().getTypeSizeInChars(GlobalRecTy).getQuantity(); |
1734 | 136 | GlobalRecordSize = llvm::alignTo(GlobalRecordSize, Alignment); |
1735 | | |
1736 | 136 | llvm::PointerType *GlobalRecPtrTy = |
1737 | 136 | CGF.ConvertTypeForMem(GlobalRecTy)->getPointerTo(); |
1738 | 136 | llvm::Value *GlobalRecCastAddr; |
1739 | 136 | llvm::Value *IsTTD = nullptr; |
1740 | 136 | if (!IsInTTDRegion && |
1741 | 11 | (WithSPMDCheck || |
1742 | 11 | getExecutionMode() == CGOpenMPRuntimeGPU::EM_Unknown0 )) { |
1743 | 11 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".exit"); |
1744 | 11 | llvm::BasicBlock *SPMDBB = CGF.createBasicBlock(".spmd"); |
1745 | 11 | llvm::BasicBlock *NonSPMDBB = CGF.createBasicBlock(".non-spmd"); |
1746 | 11 | if (I->getSecond().SecondaryGlobalRecord.hasValue()) { |
1747 | 10 | llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc); |
1748 | 10 | llvm::Value *ThreadID = getThreadID(CGF, Loc); |
1749 | 10 | llvm::Value *PL = CGF.EmitRuntimeCall( |
1750 | 10 | OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(), |
1751 | 10 | OMPRTL___kmpc_parallel_level), |
1752 | 10 | {RTLoc, ThreadID}); |
1753 | 10 | IsTTD = Bld.CreateIsNull(PL); |
1754 | 10 | } |
1755 | 11 | llvm::Value *IsSPMD = Bld.CreateIsNotNull( |
1756 | 11 | CGF.EmitNounwindRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
1757 | 11 | CGM.getModule(), OMPRTL___kmpc_is_spmd_exec_mode))); |
1758 | 11 | Bld.CreateCondBr(IsSPMD, SPMDBB, NonSPMDBB); |
1759 | | // There is no need to emit line number for unconditional branch. |
1760 | 11 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
1761 | 11 | CGF.EmitBlock(SPMDBB); |
1762 | 11 | Address RecPtr = Address(llvm::ConstantPointerNull::get(GlobalRecPtrTy), |
1763 | 11 | CharUnits::fromQuantity(Alignment)); |
1764 | 11 | CGF.EmitBranch(ExitBB); |
1765 | | // There is no need to emit line number for unconditional branch. |
1766 | 11 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
1767 | 11 | CGF.EmitBlock(NonSPMDBB); |
1768 | 11 | llvm::Value *Size = llvm::ConstantInt::get(CGM.SizeTy, GlobalRecordSize); |
1769 | 11 | if (const RecordDecl *SecGlobalizedVarsRecord = |
1770 | 10 | I->getSecond().SecondaryGlobalRecord.getValueOr(nullptr)) { |
1771 | 10 | SecGlobalRecTy = |
1772 | 10 | CGM.getContext().getRecordType(SecGlobalizedVarsRecord); |
1773 | | |
1774 | | // Recover pointer to this function's global record. The runtime will |
1775 | | // handle the specifics of the allocation of the memory. |
1776 | | // Use actual memory size of the record including the padding |
1777 | | // for alignment purposes. |
1778 | 10 | unsigned Alignment = |
1779 | 10 | CGM.getContext().getTypeAlignInChars(SecGlobalRecTy).getQuantity(); |
1780 | 10 | unsigned GlobalRecordSize = |
1781 | 10 | CGM.getContext().getTypeSizeInChars(SecGlobalRecTy).getQuantity(); |
1782 | 10 | GlobalRecordSize = llvm::alignTo(GlobalRecordSize, Alignment); |
1783 | 10 | Size = Bld.CreateSelect( |
1784 | 10 | IsTTD, llvm::ConstantInt::get(CGM.SizeTy, GlobalRecordSize), Size); |
1785 | 10 | } |
1786 | | // TODO: allow the usage of shared memory to be controlled by |
1787 | | // the user, for now, default to global. |
1788 | 11 | llvm::Value *GlobalRecordSizeArg[] = { |
1789 | 11 | Size, CGF.Builder.getInt16(/*UseSharedMemory=*/0)}; |
1790 | 11 | llvm::Value *GlobalRecValue = CGF.EmitRuntimeCall( |
1791 | 11 | OMPBuilder.getOrCreateRuntimeFunction( |
1792 | 11 | CGM.getModule(), OMPRTL___kmpc_data_sharing_coalesced_push_stack), |
1793 | 11 | GlobalRecordSizeArg); |
1794 | 11 | GlobalRecCastAddr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
1795 | 11 | GlobalRecValue, GlobalRecPtrTy); |
1796 | 11 | CGF.EmitBlock(ExitBB); |
1797 | 11 | auto *Phi = Bld.CreatePHI(GlobalRecPtrTy, |
1798 | 11 | /*NumReservedValues=*/2, "_select_stack"); |
1799 | 11 | Phi->addIncoming(RecPtr.getPointer(), SPMDBB); |
1800 | 11 | Phi->addIncoming(GlobalRecCastAddr, NonSPMDBB); |
1801 | 11 | GlobalRecCastAddr = Phi; |
1802 | 11 | I->getSecond().GlobalRecordAddr = Phi; |
1803 | 11 | I->getSecond().IsInSPMDModeFlag = IsSPMD; |
1804 | 125 | } else if (!CGM.getLangOpts().OpenMPCUDATargetParallel && IsInTTDRegion79 ) { |
1805 | 79 | assert(GlobalizedRecords.back().Records.size() < 2 && |
1806 | 79 | "Expected less than 2 globalized records: one for target and one " |
1807 | 79 | "for teams."); |
1808 | 79 | unsigned Offset = 0; |
1809 | 4 | for (const RecordDecl *RD : GlobalizedRecords.back().Records) { |
1810 | 4 | QualType RDTy = CGM.getContext().getRecordType(RD); |
1811 | 4 | unsigned Alignment = |
1812 | 4 | CGM.getContext().getTypeAlignInChars(RDTy).getQuantity(); |
1813 | 4 | unsigned Size = CGM.getContext().getTypeSizeInChars(RDTy).getQuantity(); |
1814 | 4 | Offset = |
1815 | 4 | llvm::alignTo(llvm::alignTo(Offset, Alignment) + Size, Alignment); |
1816 | 4 | } |
1817 | 79 | unsigned Alignment = |
1818 | 79 | CGM.getContext().getTypeAlignInChars(GlobalRecTy).getQuantity(); |
1819 | 79 | Offset = llvm::alignTo(Offset, Alignment); |
1820 | 79 | GlobalizedRecords.back().Records.push_back(GlobalizedVarsRecord); |
1821 | 79 | ++GlobalizedRecords.back().RegionCounter; |
1822 | 79 | if (GlobalizedRecords.back().Records.size() == 1) { |
1823 | 75 | assert(KernelStaticGlobalized && |
1824 | 75 | "Kernel static pointer must be initialized already."); |
1825 | 75 | auto *UseSharedMemory = new llvm::GlobalVariable( |
1826 | 75 | CGM.getModule(), CGM.Int16Ty, /*isConstant=*/true, |
1827 | 75 | llvm::GlobalValue::InternalLinkage, nullptr, |
1828 | 75 | "_openmp_static_kernel$is_shared"); |
1829 | 75 | UseSharedMemory->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); |
1830 | 75 | QualType Int16Ty = CGM.getContext().getIntTypeForBitwidth( |
1831 | 75 | /*DestWidth=*/16, /*Signed=*/0); |
1832 | 75 | llvm::Value *IsInSharedMemory = CGF.EmitLoadOfScalar( |
1833 | 75 | Address(UseSharedMemory, |
1834 | 75 | CGM.getContext().getTypeAlignInChars(Int16Ty)), |
1835 | 75 | /*Volatile=*/false, Int16Ty, Loc); |
1836 | 75 | auto *StaticGlobalized = new llvm::GlobalVariable( |
1837 | 75 | CGM.getModule(), CGM.Int8Ty, /*isConstant=*/false, |
1838 | 75 | llvm::GlobalValue::CommonLinkage, nullptr); |
1839 | 75 | auto *RecSize = new llvm::GlobalVariable( |
1840 | 75 | CGM.getModule(), CGM.SizeTy, /*isConstant=*/true, |
1841 | 75 | llvm::GlobalValue::InternalLinkage, nullptr, |
1842 | 75 | "_openmp_static_kernel$size"); |
1843 | 75 | RecSize->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); |
1844 | 75 | llvm::Value *Ld = CGF.EmitLoadOfScalar( |
1845 | 75 | Address(RecSize, CGM.getSizeAlign()), /*Volatile=*/false, |
1846 | 75 | CGM.getContext().getSizeType(), Loc); |
1847 | 75 | llvm::Value *ResAddr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
1848 | 75 | KernelStaticGlobalized, CGM.VoidPtrPtrTy); |
1849 | 75 | llvm::Value *GlobalRecordSizeArg[] = { |
1850 | 75 | llvm::ConstantInt::get( |
1851 | 75 | CGM.Int16Ty, |
1852 | 43 | getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD ? 132 : 0), |
1853 | 75 | StaticGlobalized, Ld, IsInSharedMemory, ResAddr}; |
1854 | 75 | CGF.EmitRuntimeCall( |
1855 | 75 | OMPBuilder.getOrCreateRuntimeFunction( |
1856 | 75 | CGM.getModule(), OMPRTL___kmpc_get_team_static_memory), |
1857 | 75 | GlobalRecordSizeArg); |
1858 | 75 | GlobalizedRecords.back().Buffer = StaticGlobalized; |
1859 | 75 | GlobalizedRecords.back().RecSize = RecSize; |
1860 | 75 | GlobalizedRecords.back().UseSharedMemory = UseSharedMemory; |
1861 | 75 | GlobalizedRecords.back().Loc = Loc; |
1862 | 75 | } |
1863 | 79 | assert(KernelStaticGlobalized && "Global address must be set already."); |
1864 | 79 | Address FrameAddr = CGF.EmitLoadOfPointer( |
1865 | 79 | Address(KernelStaticGlobalized, CGM.getPointerAlign()), |
1866 | 79 | CGM.getContext() |
1867 | 79 | .getPointerType(CGM.getContext().VoidPtrTy) |
1868 | 79 | .castAs<PointerType>()); |
1869 | 79 | llvm::Value *GlobalRecValue = |
1870 | 79 | Bld.CreateConstInBoundsGEP(FrameAddr, Offset).getPointer(); |
1871 | 79 | I->getSecond().GlobalRecordAddr = GlobalRecValue; |
1872 | 79 | I->getSecond().IsInSPMDModeFlag = nullptr; |
1873 | 79 | GlobalRecCastAddr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
1874 | 79 | GlobalRecValue, CGF.ConvertTypeForMem(GlobalRecTy)->getPointerTo()); |
1875 | 46 | } else { |
1876 | | // TODO: allow the usage of shared memory to be controlled by |
1877 | | // the user, for now, default to global. |
1878 | 46 | bool UseSharedMemory = |
1879 | 46 | IsInTTDRegion && GlobalRecordSize <= SharedMemorySize; |
1880 | 46 | llvm::Value *GlobalRecordSizeArg[] = { |
1881 | 46 | llvm::ConstantInt::get(CGM.SizeTy, GlobalRecordSize), |
1882 | 46 | CGF.Builder.getInt16(UseSharedMemory ? 1 : 00 )}; |
1883 | 46 | llvm::Value *GlobalRecValue = CGF.EmitRuntimeCall( |
1884 | 46 | OMPBuilder.getOrCreateRuntimeFunction( |
1885 | 46 | CGM.getModule(), |
1886 | 46 | IsInTTDRegion ? OMPRTL___kmpc_data_sharing_push_stack |
1887 | 0 | : OMPRTL___kmpc_data_sharing_coalesced_push_stack), |
1888 | 46 | GlobalRecordSizeArg); |
1889 | 46 | GlobalRecCastAddr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
1890 | 46 | GlobalRecValue, GlobalRecPtrTy); |
1891 | 46 | I->getSecond().GlobalRecordAddr = GlobalRecValue; |
1892 | 46 | I->getSecond().IsInSPMDModeFlag = nullptr; |
1893 | 46 | } |
1894 | 136 | LValue Base = |
1895 | 136 | CGF.MakeNaturalAlignPointeeAddrLValue(GlobalRecCastAddr, GlobalRecTy); |
1896 | | |
1897 | | // Emit the "global alloca" which is a GEP from the global declaration |
1898 | | // record using the pointer returned by the runtime. |
1899 | 136 | LValue SecBase; |
1900 | 136 | decltype(I->getSecond().LocalVarData)::const_iterator SecIt; |
1901 | 136 | if (IsTTD) { |
1902 | 10 | SecIt = I->getSecond().SecondaryLocalVarData->begin(); |
1903 | 10 | llvm::PointerType *SecGlobalRecPtrTy = |
1904 | 10 | CGF.ConvertTypeForMem(SecGlobalRecTy)->getPointerTo(); |
1905 | 10 | SecBase = CGF.MakeNaturalAlignPointeeAddrLValue( |
1906 | 10 | Bld.CreatePointerBitCastOrAddrSpaceCast( |
1907 | 10 | I->getSecond().GlobalRecordAddr, SecGlobalRecPtrTy), |
1908 | 10 | SecGlobalRecTy); |
1909 | 10 | } |
1910 | 166 | for (auto &Rec : I->getSecond().LocalVarData) { |
1911 | 166 | bool EscapedParam = I->getSecond().EscapedParameters.count(Rec.first); |
1912 | 166 | llvm::Value *ParValue; |
1913 | 166 | if (EscapedParam) { |
1914 | 43 | const auto *VD = cast<VarDecl>(Rec.first); |
1915 | 43 | LValue ParLVal = |
1916 | 43 | CGF.MakeAddrLValue(CGF.GetAddrOfLocalVar(VD), VD->getType()); |
1917 | 43 | ParValue = CGF.EmitLoadOfScalar(ParLVal, Loc); |
1918 | 43 | } |
1919 | 166 | LValue VarAddr = CGF.EmitLValueForField(Base, Rec.second.FD); |
1920 | | // Emit VarAddr basing on lane-id if required. |
1921 | 166 | QualType VarTy; |
1922 | 166 | if (Rec.second.IsOnePerTeam) { |
1923 | 155 | VarTy = Rec.second.FD->getType(); |
1924 | 11 | } else { |
1925 | 11 | llvm::Value *Ptr = CGF.Builder.CreateInBoundsGEP( |
1926 | 11 | VarAddr.getAddress(CGF).getPointer(), |
1927 | 11 | {Bld.getInt32(0), getNVPTXLaneID(CGF)}); |
1928 | 11 | VarTy = |
1929 | 11 | Rec.second.FD->getType()->castAsArrayTypeUnsafe()->getElementType(); |
1930 | 11 | VarAddr = CGF.MakeAddrLValue( |
1931 | 11 | Address(Ptr, CGM.getContext().getDeclAlign(Rec.first)), VarTy, |
1932 | 11 | AlignmentSource::Decl); |
1933 | 11 | } |
1934 | 166 | Rec.second.PrivateAddr = VarAddr.getAddress(CGF); |
1935 | 166 | if (!IsInTTDRegion && |
1936 | 11 | (WithSPMDCheck || |
1937 | 11 | getExecutionMode() == CGOpenMPRuntimeGPU::EM_Unknown0 )) { |
1938 | 11 | assert(I->getSecond().IsInSPMDModeFlag && |
1939 | 11 | "Expected unknown execution mode or required SPMD check."); |
1940 | 11 | if (IsTTD) { |
1941 | 10 | assert(SecIt->second.IsOnePerTeam && |
1942 | 10 | "Secondary glob data must be one per team."); |
1943 | 10 | LValue SecVarAddr = CGF.EmitLValueForField(SecBase, SecIt->second.FD); |
1944 | 10 | VarAddr.setAddress( |
1945 | 10 | Address(Bld.CreateSelect(IsTTD, SecVarAddr.getPointer(CGF), |
1946 | 10 | VarAddr.getPointer(CGF)), |
1947 | 10 | VarAddr.getAlignment())); |
1948 | 10 | Rec.second.PrivateAddr = VarAddr.getAddress(CGF); |
1949 | 10 | } |
1950 | 11 | Address GlobalPtr = Rec.second.PrivateAddr; |
1951 | 11 | Address LocalAddr = CGF.CreateMemTemp(VarTy, Rec.second.FD->getName()); |
1952 | 11 | Rec.second.PrivateAddr = Address( |
1953 | 11 | Bld.CreateSelect(I->getSecond().IsInSPMDModeFlag, |
1954 | 11 | LocalAddr.getPointer(), GlobalPtr.getPointer()), |
1955 | 11 | LocalAddr.getAlignment()); |
1956 | 11 | } |
1957 | 166 | if (EscapedParam) { |
1958 | 43 | const auto *VD = cast<VarDecl>(Rec.first); |
1959 | 43 | CGF.EmitStoreOfScalar(ParValue, VarAddr); |
1960 | 43 | I->getSecond().MappedParams->setVarAddr(CGF, VD, |
1961 | 43 | VarAddr.getAddress(CGF)); |
1962 | 43 | } |
1963 | 166 | if (IsTTD) |
1964 | 10 | ++SecIt; |
1965 | 166 | } |
1966 | 136 | } |
1967 | 0 | for (const ValueDecl *VD : I->getSecond().EscapedVariableLengthDecls) { |
1968 | | // Recover pointer to this function's global record. The runtime will |
1969 | | // handle the specifics of the allocation of the memory. |
1970 | | // Use actual memory size of the record including the padding |
1971 | | // for alignment purposes. |
1972 | 0 | CGBuilderTy &Bld = CGF.Builder; |
1973 | 0 | llvm::Value *Size = CGF.getTypeSize(VD->getType()); |
1974 | 0 | CharUnits Align = CGM.getContext().getDeclAlign(VD); |
1975 | 0 | Size = Bld.CreateNUWAdd( |
1976 | 0 | Size, llvm::ConstantInt::get(CGF.SizeTy, Align.getQuantity() - 1)); |
1977 | 0 | llvm::Value *AlignVal = |
1978 | 0 | llvm::ConstantInt::get(CGF.SizeTy, Align.getQuantity()); |
1979 | 0 | Size = Bld.CreateUDiv(Size, AlignVal); |
1980 | 0 | Size = Bld.CreateNUWMul(Size, AlignVal); |
1981 | | // TODO: allow the usage of shared memory to be controlled by |
1982 | | // the user, for now, default to global. |
1983 | 0 | llvm::Value *GlobalRecordSizeArg[] = { |
1984 | 0 | Size, CGF.Builder.getInt16(/*UseSharedMemory=*/0)}; |
1985 | 0 | llvm::Value *GlobalRecValue = CGF.EmitRuntimeCall( |
1986 | 0 | OMPBuilder.getOrCreateRuntimeFunction( |
1987 | 0 | CGM.getModule(), OMPRTL___kmpc_data_sharing_coalesced_push_stack), |
1988 | 0 | GlobalRecordSizeArg); |
1989 | 0 | llvm::Value *GlobalRecCastAddr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
1990 | 0 | GlobalRecValue, CGF.ConvertTypeForMem(VD->getType())->getPointerTo()); |
1991 | 0 | LValue Base = CGF.MakeAddrLValue(GlobalRecCastAddr, VD->getType(), |
1992 | 0 | CGM.getContext().getDeclAlign(VD), |
1993 | 0 | AlignmentSource::Decl); |
1994 | 0 | I->getSecond().MappedParams->setVarAddr(CGF, cast<VarDecl>(VD), |
1995 | 0 | Base.getAddress(CGF)); |
1996 | 0 | I->getSecond().EscapedVariableLengthDeclsAddrs.emplace_back(GlobalRecValue); |
1997 | 0 | } |
1998 | 136 | I->getSecond().MappedParams->apply(CGF); |
1999 | 136 | } |
2000 | | |
2001 | | void CGOpenMPRuntimeGPU::emitGenericVarsEpilog(CodeGenFunction &CGF, |
2002 | 673 | bool WithSPMDCheck) { |
2003 | 673 | if (getDataSharingMode(CGM) != CGOpenMPRuntimeGPU::Generic && |
2004 | 170 | getExecutionMode() != CGOpenMPRuntimeGPU::EM_SPMD) |
2005 | 2 | return; |
2006 | | |
2007 | 671 | const auto I = FunctionGlobalizedDecls.find(CGF.CurFn); |
2008 | 671 | if (I != FunctionGlobalizedDecls.end()) { |
2009 | 136 | I->getSecond().MappedParams->restore(CGF); |
2010 | 136 | if (!CGF.HaveInsertPoint()) |
2011 | 0 | return; |
2012 | 136 | for (llvm::Value *Addr : |
2013 | 0 | llvm::reverse(I->getSecond().EscapedVariableLengthDeclsAddrs)) { |
2014 | 0 | CGF.EmitRuntimeCall( |
2015 | 0 | OMPBuilder.getOrCreateRuntimeFunction( |
2016 | 0 | CGM.getModule(), OMPRTL___kmpc_data_sharing_pop_stack), |
2017 | 0 | Addr); |
2018 | 0 | } |
2019 | 136 | if (I->getSecond().GlobalRecordAddr) { |
2020 | 136 | if (!IsInTTDRegion && |
2021 | 11 | (WithSPMDCheck || |
2022 | 11 | getExecutionMode() == CGOpenMPRuntimeGPU::EM_Unknown0 )) { |
2023 | 11 | CGBuilderTy &Bld = CGF.Builder; |
2024 | 11 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".exit"); |
2025 | 11 | llvm::BasicBlock *NonSPMDBB = CGF.createBasicBlock(".non-spmd"); |
2026 | 11 | Bld.CreateCondBr(I->getSecond().IsInSPMDModeFlag, ExitBB, NonSPMDBB); |
2027 | | // There is no need to emit line number for unconditional branch. |
2028 | 11 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
2029 | 11 | CGF.EmitBlock(NonSPMDBB); |
2030 | 11 | CGF.EmitRuntimeCall( |
2031 | 11 | OMPBuilder.getOrCreateRuntimeFunction( |
2032 | 11 | CGM.getModule(), OMPRTL___kmpc_data_sharing_pop_stack), |
2033 | 11 | CGF.EmitCastToVoidPtr(I->getSecond().GlobalRecordAddr)); |
2034 | 11 | CGF.EmitBlock(ExitBB); |
2035 | 125 | } else if (!CGM.getLangOpts().OpenMPCUDATargetParallel && IsInTTDRegion79 ) { |
2036 | 79 | assert(GlobalizedRecords.back().RegionCounter > 0 && |
2037 | 79 | "region counter must be > 0."); |
2038 | 79 | --GlobalizedRecords.back().RegionCounter; |
2039 | | // Emit the restore function only in the target region. |
2040 | 79 | if (GlobalizedRecords.back().RegionCounter == 0) { |
2041 | 75 | QualType Int16Ty = CGM.getContext().getIntTypeForBitwidth( |
2042 | 75 | /*DestWidth=*/16, /*Signed=*/0); |
2043 | 75 | llvm::Value *IsInSharedMemory = CGF.EmitLoadOfScalar( |
2044 | 75 | Address(GlobalizedRecords.back().UseSharedMemory, |
2045 | 75 | CGM.getContext().getTypeAlignInChars(Int16Ty)), |
2046 | 75 | /*Volatile=*/false, Int16Ty, GlobalizedRecords.back().Loc); |
2047 | 75 | llvm::Value *Args[] = { |
2048 | 75 | llvm::ConstantInt::get( |
2049 | 75 | CGM.Int16Ty, |
2050 | 43 | getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD ? 132 : 0), |
2051 | 75 | IsInSharedMemory}; |
2052 | 75 | CGF.EmitRuntimeCall( |
2053 | 75 | OMPBuilder.getOrCreateRuntimeFunction( |
2054 | 75 | CGM.getModule(), OMPRTL___kmpc_restore_team_static_memory), |
2055 | 75 | Args); |
2056 | 75 | } |
2057 | 46 | } else { |
2058 | 46 | CGF.EmitRuntimeCall( |
2059 | 46 | OMPBuilder.getOrCreateRuntimeFunction( |
2060 | 46 | CGM.getModule(), OMPRTL___kmpc_data_sharing_pop_stack), |
2061 | 46 | I->getSecond().GlobalRecordAddr); |
2062 | 46 | } |
2063 | 136 | } |
2064 | 136 | } |
2065 | 671 | } |
2066 | | |
2067 | | void CGOpenMPRuntimeGPU::emitTeamsCall(CodeGenFunction &CGF, |
2068 | | const OMPExecutableDirective &D, |
2069 | | SourceLocation Loc, |
2070 | | llvm::Function *OutlinedFn, |
2071 | 467 | ArrayRef<llvm::Value *> CapturedVars) { |
2072 | 467 | if (!CGF.HaveInsertPoint()) |
2073 | 0 | return; |
2074 | | |
2075 | 467 | Address ZeroAddr = CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty, |
2076 | 467 | /*Name=*/".zero.addr"); |
2077 | 467 | CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
2078 | 467 | llvm::SmallVector<llvm::Value *, 16> OutlinedFnArgs; |
2079 | 467 | OutlinedFnArgs.push_back(emitThreadIDAddress(CGF, Loc).getPointer()); |
2080 | 467 | OutlinedFnArgs.push_back(ZeroAddr.getPointer()); |
2081 | 467 | OutlinedFnArgs.append(CapturedVars.begin(), CapturedVars.end()); |
2082 | 467 | emitOutlinedFunctionCall(CGF, Loc, OutlinedFn, OutlinedFnArgs); |
2083 | 467 | } |
2084 | | |
2085 | | void CGOpenMPRuntimeGPU::emitParallelCall( |
2086 | | CodeGenFunction &CGF, SourceLocation Loc, llvm::Function *OutlinedFn, |
2087 | 707 | ArrayRef<llvm::Value *> CapturedVars, const Expr *IfCond) { |
2088 | 707 | if (!CGF.HaveInsertPoint()) |
2089 | 0 | return; |
2090 | | |
2091 | 707 | if (getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD) |
2092 | 633 | emitSPMDParallelCall(CGF, Loc, OutlinedFn, CapturedVars, IfCond); |
2093 | 74 | else |
2094 | 74 | emitNonSPMDParallelCall(CGF, Loc, OutlinedFn, CapturedVars, IfCond); |
2095 | 707 | } |
2096 | | |
2097 | | void CGOpenMPRuntimeGPU::emitNonSPMDParallelCall( |
2098 | | CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn, |
2099 | 74 | ArrayRef<llvm::Value *> CapturedVars, const Expr *IfCond) { |
2100 | 74 | llvm::Function *Fn = cast<llvm::Function>(OutlinedFn); |
2101 | | |
2102 | | // Force inline this outlined function at its call site. |
2103 | 74 | Fn->setLinkage(llvm::GlobalValue::InternalLinkage); |
2104 | | |
2105 | 74 | Address ZeroAddr = CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty, |
2106 | 74 | /*Name=*/".zero.addr"); |
2107 | 74 | CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
2108 | | // ThreadId for serialized parallels is 0. |
2109 | 74 | Address ThreadIDAddr = ZeroAddr; |
2110 | 74 | auto &&CodeGen = [this, Fn, CapturedVars, Loc, &ThreadIDAddr]( |
2111 | 16 | CodeGenFunction &CGF, PrePostActionTy &Action) { |
2112 | 16 | Action.Enter(CGF); |
2113 | | |
2114 | 16 | Address ZeroAddr = |
2115 | 16 | CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty, |
2116 | 16 | /*Name=*/".bound.zero.addr"); |
2117 | 16 | CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
2118 | 16 | llvm::SmallVector<llvm::Value *, 16> OutlinedFnArgs; |
2119 | 16 | OutlinedFnArgs.push_back(ThreadIDAddr.getPointer()); |
2120 | 16 | OutlinedFnArgs.push_back(ZeroAddr.getPointer()); |
2121 | 16 | OutlinedFnArgs.append(CapturedVars.begin(), CapturedVars.end()); |
2122 | 16 | emitOutlinedFunctionCall(CGF, Loc, Fn, OutlinedFnArgs); |
2123 | 16 | }; |
2124 | 74 | auto &&SeqGen = [this, &CodeGen, Loc](CodeGenFunction &CGF, |
2125 | 16 | PrePostActionTy &) { |
2126 | | |
2127 | 16 | RegionCodeGenTy RCG(CodeGen); |
2128 | 16 | llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc); |
2129 | 16 | llvm::Value *ThreadID = getThreadID(CGF, Loc); |
2130 | 16 | llvm::Value *Args[] = {RTLoc, ThreadID}; |
2131 | | |
2132 | 16 | NVPTXActionTy Action( |
2133 | 16 | OMPBuilder.getOrCreateRuntimeFunction( |
2134 | 16 | CGM.getModule(), OMPRTL___kmpc_serialized_parallel), |
2135 | 16 | Args, |
2136 | 16 | OMPBuilder.getOrCreateRuntimeFunction( |
2137 | 16 | CGM.getModule(), OMPRTL___kmpc_end_serialized_parallel), |
2138 | 16 | Args); |
2139 | 16 | RCG.setAction(Action); |
2140 | 16 | RCG(CGF); |
2141 | 16 | }; |
2142 | | |
2143 | 74 | auto &&L0ParallelGen = [this, CapturedVars, Fn](CodeGenFunction &CGF, |
2144 | 68 | PrePostActionTy &Action) { |
2145 | 68 | CGBuilderTy &Bld = CGF.Builder; |
2146 | 68 | llvm::Function *WFn = WrapperFunctionsMap[Fn]; |
2147 | 68 | assert(WFn && "Wrapper function does not exist!"); |
2148 | 68 | llvm::Value *ID = Bld.CreateBitOrPointerCast(WFn, CGM.Int8PtrTy); |
2149 | | |
2150 | | // Prepare for parallel region. Indicate the outlined function. |
2151 | 68 | llvm::Value *Args[] = {ID}; |
2152 | 68 | CGF.EmitRuntimeCall( |
2153 | 68 | OMPBuilder.getOrCreateRuntimeFunction( |
2154 | 68 | CGM.getModule(), OMPRTL___kmpc_kernel_prepare_parallel), |
2155 | 68 | Args); |
2156 | | |
2157 | | // Create a private scope that will globalize the arguments |
2158 | | // passed from the outside of the target region. |
2159 | 68 | CodeGenFunction::OMPPrivateScope PrivateArgScope(CGF); |
2160 | | |
2161 | | // There's something to share. |
2162 | 68 | if (!CapturedVars.empty()) { |
2163 | | // Prepare for parallel region. Indicate the outlined function. |
2164 | 27 | Address SharedArgs = |
2165 | 27 | CGF.CreateDefaultAlignTempAlloca(CGF.VoidPtrPtrTy, "shared_arg_refs"); |
2166 | 27 | llvm::Value *SharedArgsPtr = SharedArgs.getPointer(); |
2167 | | |
2168 | 27 | llvm::Value *DataSharingArgs[] = { |
2169 | 27 | SharedArgsPtr, |
2170 | 27 | llvm::ConstantInt::get(CGM.SizeTy, CapturedVars.size())}; |
2171 | 27 | CGF.EmitRuntimeCall( |
2172 | 27 | OMPBuilder.getOrCreateRuntimeFunction( |
2173 | 27 | CGM.getModule(), OMPRTL___kmpc_begin_sharing_variables), |
2174 | 27 | DataSharingArgs); |
2175 | | |
2176 | | // Store variable address in a list of references to pass to workers. |
2177 | 27 | unsigned Idx = 0; |
2178 | 27 | ASTContext &Ctx = CGF.getContext(); |
2179 | 27 | Address SharedArgListAddress = CGF.EmitLoadOfPointer( |
2180 | 27 | SharedArgs, Ctx.getPointerType(Ctx.getPointerType(Ctx.VoidPtrTy)) |
2181 | 27 | .castAs<PointerType>()); |
2182 | 46 | for (llvm::Value *V : CapturedVars) { |
2183 | 46 | Address Dst = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx); |
2184 | 46 | llvm::Value *PtrV; |
2185 | 46 | if (V->getType()->isIntegerTy()) |
2186 | 0 | PtrV = Bld.CreateIntToPtr(V, CGF.VoidPtrTy); |
2187 | 46 | else |
2188 | 46 | PtrV = Bld.CreatePointerBitCastOrAddrSpaceCast(V, CGF.VoidPtrTy); |
2189 | 46 | CGF.EmitStoreOfScalar(PtrV, Dst, /*Volatile=*/false, |
2190 | 46 | Ctx.getPointerType(Ctx.VoidPtrTy)); |
2191 | 46 | ++Idx; |
2192 | 46 | } |
2193 | 27 | } |
2194 | | |
2195 | | // Activate workers. This barrier is used by the master to signal |
2196 | | // work for the workers. |
2197 | 68 | syncCTAThreads(CGF); |
2198 | | |
2199 | | // OpenMP [2.5, Parallel Construct, p.49] |
2200 | | // There is an implied barrier at the end of a parallel region. After the |
2201 | | // end of a parallel region, only the master thread of the team resumes |
2202 | | // execution of the enclosing task region. |
2203 | | // |
2204 | | // The master waits at this barrier until all workers are done. |
2205 | 68 | syncCTAThreads(CGF); |
2206 | | |
2207 | 68 | if (!CapturedVars.empty()) |
2208 | 27 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
2209 | 27 | CGM.getModule(), OMPRTL___kmpc_end_sharing_variables)); |
2210 | | |
2211 | | // Remember for post-processing in worker loop. |
2212 | 68 | Work.emplace_back(WFn); |
2213 | 68 | }; |
2214 | | |
2215 | 74 | auto &&LNParallelGen = [this, Loc, &SeqGen, &L0ParallelGen]( |
2216 | 68 | CodeGenFunction &CGF, PrePostActionTy &Action) { |
2217 | 68 | if (IsInParallelRegion) { |
2218 | 0 | SeqGen(CGF, Action); |
2219 | 68 | } else if (IsInTargetMasterThreadRegion) { |
2220 | 64 | L0ParallelGen(CGF, Action); |
2221 | 4 | } else { |
2222 | | // Check for master and then parallelism: |
2223 | | // if (__kmpc_is_spmd_exec_mode() || __kmpc_parallel_level(loc, gtid)) { |
2224 | | // Serialized execution. |
2225 | | // } else { |
2226 | | // Worker call. |
2227 | | // } |
2228 | 4 | CGBuilderTy &Bld = CGF.Builder; |
2229 | 4 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".exit"); |
2230 | 4 | llvm::BasicBlock *SeqBB = CGF.createBasicBlock(".sequential"); |
2231 | 4 | llvm::BasicBlock *ParallelCheckBB = CGF.createBasicBlock(".parcheck"); |
2232 | 4 | llvm::BasicBlock *MasterBB = CGF.createBasicBlock(".master"); |
2233 | 4 | llvm::Value *IsSPMD = Bld.CreateIsNotNull( |
2234 | 4 | CGF.EmitNounwindRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
2235 | 4 | CGM.getModule(), OMPRTL___kmpc_is_spmd_exec_mode))); |
2236 | 4 | Bld.CreateCondBr(IsSPMD, SeqBB, ParallelCheckBB); |
2237 | | // There is no need to emit line number for unconditional branch. |
2238 | 4 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
2239 | 4 | CGF.EmitBlock(ParallelCheckBB); |
2240 | 4 | llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc); |
2241 | 4 | llvm::Value *ThreadID = getThreadID(CGF, Loc); |
2242 | 4 | llvm::Value *PL = CGF.EmitRuntimeCall( |
2243 | 4 | OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(), |
2244 | 4 | OMPRTL___kmpc_parallel_level), |
2245 | 4 | {RTLoc, ThreadID}); |
2246 | 4 | llvm::Value *Res = Bld.CreateIsNotNull(PL); |
2247 | 4 | Bld.CreateCondBr(Res, SeqBB, MasterBB); |
2248 | 4 | CGF.EmitBlock(SeqBB); |
2249 | 4 | SeqGen(CGF, Action); |
2250 | 4 | CGF.EmitBranch(ExitBB); |
2251 | | // There is no need to emit line number for unconditional branch. |
2252 | 4 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
2253 | 4 | CGF.EmitBlock(MasterBB); |
2254 | 4 | L0ParallelGen(CGF, Action); |
2255 | 4 | CGF.EmitBranch(ExitBB); |
2256 | | // There is no need to emit line number for unconditional branch. |
2257 | 4 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
2258 | | // Emit the continuation block for code after the if. |
2259 | 4 | CGF.EmitBlock(ExitBB, /*IsFinished=*/true); |
2260 | 4 | } |
2261 | 68 | }; |
2262 | | |
2263 | 74 | if (IfCond) { |
2264 | 18 | emitIfClause(CGF, IfCond, LNParallelGen, SeqGen); |
2265 | 56 | } else { |
2266 | 56 | CodeGenFunction::RunCleanupsScope Scope(CGF); |
2267 | 56 | RegionCodeGenTy ThenRCG(LNParallelGen); |
2268 | 56 | ThenRCG(CGF); |
2269 | 56 | } |
2270 | 74 | } |
2271 | | |
2272 | | void CGOpenMPRuntimeGPU::emitSPMDParallelCall( |
2273 | | CodeGenFunction &CGF, SourceLocation Loc, llvm::Function *OutlinedFn, |
2274 | 633 | ArrayRef<llvm::Value *> CapturedVars, const Expr *IfCond) { |
2275 | | // Just call the outlined function to execute the parallel region. |
2276 | | // OutlinedFn(>id, &zero, CapturedStruct); |
2277 | | // |
2278 | 633 | llvm::SmallVector<llvm::Value *, 16> OutlinedFnArgs; |
2279 | | |
2280 | 633 | Address ZeroAddr = CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty, |
2281 | 633 | /*Name=*/".zero.addr"); |
2282 | 633 | CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
2283 | | // ThreadId for serialized parallels is 0. |
2284 | 633 | Address ThreadIDAddr = ZeroAddr; |
2285 | 633 | auto &&CodeGen = [this, OutlinedFn, CapturedVars, Loc, &ThreadIDAddr]( |
2286 | 633 | CodeGenFunction &CGF, PrePostActionTy &Action) { |
2287 | 633 | Action.Enter(CGF); |
2288 | | |
2289 | 633 | Address ZeroAddr = |
2290 | 633 | CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty, |
2291 | 633 | /*Name=*/".bound.zero.addr"); |
2292 | 633 | CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
2293 | 633 | llvm::SmallVector<llvm::Value *, 16> OutlinedFnArgs; |
2294 | 633 | OutlinedFnArgs.push_back(ThreadIDAddr.getPointer()); |
2295 | 633 | OutlinedFnArgs.push_back(ZeroAddr.getPointer()); |
2296 | 633 | OutlinedFnArgs.append(CapturedVars.begin(), CapturedVars.end()); |
2297 | 633 | emitOutlinedFunctionCall(CGF, Loc, OutlinedFn, OutlinedFnArgs); |
2298 | 633 | }; |
2299 | 633 | auto &&SeqGen = [this, &CodeGen, Loc](CodeGenFunction &CGF, |
2300 | 3 | PrePostActionTy &) { |
2301 | | |
2302 | 3 | RegionCodeGenTy RCG(CodeGen); |
2303 | 3 | llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc); |
2304 | 3 | llvm::Value *ThreadID = getThreadID(CGF, Loc); |
2305 | 3 | llvm::Value *Args[] = {RTLoc, ThreadID}; |
2306 | | |
2307 | 3 | NVPTXActionTy Action( |
2308 | 3 | OMPBuilder.getOrCreateRuntimeFunction( |
2309 | 3 | CGM.getModule(), OMPRTL___kmpc_serialized_parallel), |
2310 | 3 | Args, |
2311 | 3 | OMPBuilder.getOrCreateRuntimeFunction( |
2312 | 3 | CGM.getModule(), OMPRTL___kmpc_end_serialized_parallel), |
2313 | 3 | Args); |
2314 | 3 | RCG.setAction(Action); |
2315 | 3 | RCG(CGF); |
2316 | 3 | }; |
2317 | | |
2318 | 633 | if (IsInTargetMasterThreadRegion) { |
2319 | | // In the worker need to use the real thread id. |
2320 | 630 | ThreadIDAddr = emitThreadIDAddress(CGF, Loc); |
2321 | 630 | RegionCodeGenTy RCG(CodeGen); |
2322 | 630 | RCG(CGF); |
2323 | 3 | } else { |
2324 | | // If we are not in the target region, it is definitely L2 parallelism or |
2325 | | // more, because for SPMD mode we always has L1 parallel level, sowe don't |
2326 | | // need to check for orphaned directives. |
2327 | 3 | RegionCodeGenTy RCG(SeqGen); |
2328 | 3 | RCG(CGF); |
2329 | 3 | } |
2330 | 633 | } |
2331 | | |
2332 | 721 | void CGOpenMPRuntimeGPU::syncCTAThreads(CodeGenFunction &CGF) { |
2333 | | // Always emit simple barriers! |
2334 | 721 | if (!CGF.HaveInsertPoint()) |
2335 | 0 | return; |
2336 | | // Build call __kmpc_barrier_simple_spmd(nullptr, 0); |
2337 | | // This function does not use parameters, so we can emit just default values. |
2338 | 721 | llvm::Value *Args[] = { |
2339 | 721 | llvm::ConstantPointerNull::get( |
2340 | 721 | cast<llvm::PointerType>(getIdentTyPointerTy())), |
2341 | 721 | llvm::ConstantInt::get(CGF.Int32Ty, /*V=*/0, /*isSigned=*/true)}; |
2342 | 721 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
2343 | 721 | CGM.getModule(), OMPRTL___kmpc_barrier_simple_spmd), |
2344 | 721 | Args); |
2345 | 721 | } |
2346 | | |
2347 | | void CGOpenMPRuntimeGPU::emitBarrierCall(CodeGenFunction &CGF, |
2348 | | SourceLocation Loc, |
2349 | | OpenMPDirectiveKind Kind, bool, |
2350 | 216 | bool) { |
2351 | | // Always emit simple barriers! |
2352 | 216 | if (!CGF.HaveInsertPoint()) |
2353 | 0 | return; |
2354 | | // Build call __kmpc_cancel_barrier(loc, thread_id); |
2355 | 216 | unsigned Flags = getDefaultFlagsForBarriers(Kind); |
2356 | 216 | llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc, Flags), |
2357 | 216 | getThreadID(CGF, Loc)}; |
2358 | | |
2359 | 216 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
2360 | 216 | CGM.getModule(), OMPRTL___kmpc_barrier), |
2361 | 216 | Args); |
2362 | 216 | } |
2363 | | |
2364 | | void CGOpenMPRuntimeGPU::emitCriticalRegion( |
2365 | | CodeGenFunction &CGF, StringRef CriticalName, |
2366 | | const RegionCodeGenTy &CriticalOpGen, SourceLocation Loc, |
2367 | 6 | const Expr *Hint) { |
2368 | 6 | llvm::BasicBlock *LoopBB = CGF.createBasicBlock("omp.critical.loop"); |
2369 | 6 | llvm::BasicBlock *TestBB = CGF.createBasicBlock("omp.critical.test"); |
2370 | 6 | llvm::BasicBlock *SyncBB = CGF.createBasicBlock("omp.critical.sync"); |
2371 | 6 | llvm::BasicBlock *BodyBB = CGF.createBasicBlock("omp.critical.body"); |
2372 | 6 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock("omp.critical.exit"); |
2373 | | |
2374 | 6 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
2375 | | |
2376 | | // Get the mask of active threads in the warp. |
2377 | 6 | llvm::Value *Mask = CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
2378 | 6 | CGM.getModule(), OMPRTL___kmpc_warp_active_thread_mask)); |
2379 | | // Fetch team-local id of the thread. |
2380 | 6 | llvm::Value *ThreadID = RT.getGPUThreadID(CGF); |
2381 | | |
2382 | | // Get the width of the team. |
2383 | 6 | llvm::Value *TeamWidth = RT.getGPUNumThreads(CGF); |
2384 | | |
2385 | | // Initialize the counter variable for the loop. |
2386 | 6 | QualType Int32Ty = |
2387 | 6 | CGF.getContext().getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/0); |
2388 | 6 | Address Counter = CGF.CreateMemTemp(Int32Ty, "critical_counter"); |
2389 | 6 | LValue CounterLVal = CGF.MakeAddrLValue(Counter, Int32Ty); |
2390 | 6 | CGF.EmitStoreOfScalar(llvm::Constant::getNullValue(CGM.Int32Ty), CounterLVal, |
2391 | 6 | /*isInit=*/true); |
2392 | | |
2393 | | // Block checks if loop counter exceeds upper bound. |
2394 | 6 | CGF.EmitBlock(LoopBB); |
2395 | 6 | llvm::Value *CounterVal = CGF.EmitLoadOfScalar(CounterLVal, Loc); |
2396 | 6 | llvm::Value *CmpLoopBound = CGF.Builder.CreateICmpSLT(CounterVal, TeamWidth); |
2397 | 6 | CGF.Builder.CreateCondBr(CmpLoopBound, TestBB, ExitBB); |
2398 | | |
2399 | | // Block tests which single thread should execute region, and which threads |
2400 | | // should go straight to synchronisation point. |
2401 | 6 | CGF.EmitBlock(TestBB); |
2402 | 6 | CounterVal = CGF.EmitLoadOfScalar(CounterLVal, Loc); |
2403 | 6 | llvm::Value *CmpThreadToCounter = |
2404 | 6 | CGF.Builder.CreateICmpEQ(ThreadID, CounterVal); |
2405 | 6 | CGF.Builder.CreateCondBr(CmpThreadToCounter, BodyBB, SyncBB); |
2406 | | |
2407 | | // Block emits the body of the critical region. |
2408 | 6 | CGF.EmitBlock(BodyBB); |
2409 | | |
2410 | | // Output the critical statement. |
2411 | 6 | CGOpenMPRuntime::emitCriticalRegion(CGF, CriticalName, CriticalOpGen, Loc, |
2412 | 6 | Hint); |
2413 | | |
2414 | | // After the body surrounded by the critical region, the single executing |
2415 | | // thread will jump to the synchronisation point. |
2416 | | // Block waits for all threads in current team to finish then increments the |
2417 | | // counter variable and returns to the loop. |
2418 | 6 | CGF.EmitBlock(SyncBB); |
2419 | | // Reconverge active threads in the warp. |
2420 | 6 | (void)CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
2421 | 6 | CGM.getModule(), OMPRTL___kmpc_syncwarp), |
2422 | 6 | Mask); |
2423 | | |
2424 | 6 | llvm::Value *IncCounterVal = |
2425 | 6 | CGF.Builder.CreateNSWAdd(CounterVal, CGF.Builder.getInt32(1)); |
2426 | 6 | CGF.EmitStoreOfScalar(IncCounterVal, CounterLVal); |
2427 | 6 | CGF.EmitBranch(LoopBB); |
2428 | | |
2429 | | // Block that is reached when all threads in the team complete the region. |
2430 | 6 | CGF.EmitBlock(ExitBB, /*IsFinished=*/true); |
2431 | 6 | } |
2432 | | |
2433 | | /// Cast value to the specified type. |
2434 | | static llvm::Value *castValueToType(CodeGenFunction &CGF, llvm::Value *Val, |
2435 | | QualType ValTy, QualType CastTy, |
2436 | 126 | SourceLocation Loc) { |
2437 | 126 | assert(!CGF.getContext().getTypeSizeInChars(CastTy).isZero() && |
2438 | 126 | "Cast type must sized."); |
2439 | 126 | assert(!CGF.getContext().getTypeSizeInChars(ValTy).isZero() && |
2440 | 126 | "Val type must sized."); |
2441 | 126 | llvm::Type *LLVMCastTy = CGF.ConvertTypeForMem(CastTy); |
2442 | 126 | if (ValTy == CastTy) |
2443 | 78 | return Val; |
2444 | 48 | if (CGF.getContext().getTypeSizeInChars(ValTy) == |
2445 | 48 | CGF.getContext().getTypeSizeInChars(CastTy)) |
2446 | 0 | return CGF.Builder.CreateBitCast(Val, LLVMCastTy); |
2447 | 48 | if (CastTy->isIntegerType() && ValTy->isIntegerType()) |
2448 | 48 | return CGF.Builder.CreateIntCast(Val, LLVMCastTy, |
2449 | 48 | CastTy->hasSignedIntegerRepresentation()); |
2450 | 0 | Address CastItem = CGF.CreateMemTemp(CastTy); |
2451 | 0 | Address ValCastItem = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
2452 | 0 | CastItem, Val->getType()->getPointerTo(CastItem.getAddressSpace())); |
2453 | 0 | CGF.EmitStoreOfScalar(Val, ValCastItem, /*Volatile=*/false, ValTy, |
2454 | 0 | LValueBaseInfo(AlignmentSource::Type), |
2455 | 0 | TBAAAccessInfo()); |
2456 | 0 | return CGF.EmitLoadOfScalar(CastItem, /*Volatile=*/false, CastTy, Loc, |
2457 | 0 | LValueBaseInfo(AlignmentSource::Type), |
2458 | 0 | TBAAAccessInfo()); |
2459 | 0 | } |
2460 | | |
2461 | | /// This function creates calls to one of two shuffle functions to copy |
2462 | | /// variables between lanes in a warp. |
2463 | | static llvm::Value *createRuntimeShuffleFunction(CodeGenFunction &CGF, |
2464 | | llvm::Value *Elem, |
2465 | | QualType ElemType, |
2466 | | llvm::Value *Offset, |
2467 | 63 | SourceLocation Loc) { |
2468 | 63 | CodeGenModule &CGM = CGF.CGM; |
2469 | 63 | CGBuilderTy &Bld = CGF.Builder; |
2470 | 63 | CGOpenMPRuntimeGPU &RT = |
2471 | 63 | *(static_cast<CGOpenMPRuntimeGPU *>(&CGM.getOpenMPRuntime())); |
2472 | 63 | llvm::OpenMPIRBuilder &OMPBuilder = RT.getOMPBuilder(); |
2473 | | |
2474 | 63 | CharUnits Size = CGF.getContext().getTypeSizeInChars(ElemType); |
2475 | 63 | assert(Size.getQuantity() <= 8 && |
2476 | 63 | "Unsupported bitwidth in shuffle instruction."); |
2477 | | |
2478 | 63 | RuntimeFunction ShuffleFn = Size.getQuantity() <= 4 |
2479 | 48 | ? OMPRTL___kmpc_shuffle_int32 |
2480 | 15 | : OMPRTL___kmpc_shuffle_int64; |
2481 | | |
2482 | | // Cast all types to 32- or 64-bit values before calling shuffle routines. |
2483 | 63 | QualType CastTy = CGF.getContext().getIntTypeForBitwidth( |
2484 | 48 | Size.getQuantity() <= 4 ? 32 : 6415 , /*Signed=*/1); |
2485 | 63 | llvm::Value *ElemCast = castValueToType(CGF, Elem, ElemType, CastTy, Loc); |
2486 | 63 | llvm::Value *WarpSize = |
2487 | 63 | Bld.CreateIntCast(RT.getGPUWarpSize(CGF), CGM.Int16Ty, /*isSigned=*/true); |
2488 | | |
2489 | 63 | llvm::Value *ShuffledVal = CGF.EmitRuntimeCall( |
2490 | 63 | OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(), ShuffleFn), |
2491 | 63 | {ElemCast, Offset, WarpSize}); |
2492 | | |
2493 | 63 | return castValueToType(CGF, ShuffledVal, CastTy, ElemType, Loc); |
2494 | 63 | } |
2495 | | |
2496 | | static void shuffleAndStore(CodeGenFunction &CGF, Address SrcAddr, |
2497 | | Address DestAddr, QualType ElemType, |
2498 | 63 | llvm::Value *Offset, SourceLocation Loc) { |
2499 | 63 | CGBuilderTy &Bld = CGF.Builder; |
2500 | | |
2501 | 63 | CharUnits Size = CGF.getContext().getTypeSizeInChars(ElemType); |
2502 | | // Create the loop over the big sized data. |
2503 | | // ptr = (void*)Elem; |
2504 | | // ptrEnd = (void*) Elem + 1; |
2505 | | // Step = 8; |
2506 | | // while (ptr + Step < ptrEnd) |
2507 | | // shuffle((int64_t)*ptr); |
2508 | | // Step = 4; |
2509 | | // while (ptr + Step < ptrEnd) |
2510 | | // shuffle((int32_t)*ptr); |
2511 | | // ... |
2512 | 63 | Address ElemPtr = DestAddr; |
2513 | 63 | Address Ptr = SrcAddr; |
2514 | 63 | Address PtrEnd = Bld.CreatePointerBitCastOrAddrSpaceCast( |
2515 | 63 | Bld.CreateConstGEP(SrcAddr, 1), CGF.VoidPtrTy); |
2516 | 315 | for (int IntSize = 8; IntSize >= 1; IntSize /= 2252 ) { |
2517 | 252 | if (Size < CharUnits::fromQuantity(IntSize)) |
2518 | 189 | continue; |
2519 | 63 | QualType IntType = CGF.getContext().getIntTypeForBitwidth( |
2520 | 63 | CGF.getContext().toBits(CharUnits::fromQuantity(IntSize)), |
2521 | 63 | /*Signed=*/1); |
2522 | 63 | llvm::Type *IntTy = CGF.ConvertTypeForMem(IntType); |
2523 | 63 | Ptr = Bld.CreatePointerBitCastOrAddrSpaceCast(Ptr, IntTy->getPointerTo()); |
2524 | 63 | ElemPtr = |
2525 | 63 | Bld.CreatePointerBitCastOrAddrSpaceCast(ElemPtr, IntTy->getPointerTo()); |
2526 | 63 | if (Size.getQuantity() / IntSize > 1) { |
2527 | 3 | llvm::BasicBlock *PreCondBB = CGF.createBasicBlock(".shuffle.pre_cond"); |
2528 | 3 | llvm::BasicBlock *ThenBB = CGF.createBasicBlock(".shuffle.then"); |
2529 | 3 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".shuffle.exit"); |
2530 | 3 | llvm::BasicBlock *CurrentBB = Bld.GetInsertBlock(); |
2531 | 3 | CGF.EmitBlock(PreCondBB); |
2532 | 3 | llvm::PHINode *PhiSrc = |
2533 | 3 | Bld.CreatePHI(Ptr.getType(), /*NumReservedValues=*/2); |
2534 | 3 | PhiSrc->addIncoming(Ptr.getPointer(), CurrentBB); |
2535 | 3 | llvm::PHINode *PhiDest = |
2536 | 3 | Bld.CreatePHI(ElemPtr.getType(), /*NumReservedValues=*/2); |
2537 | 3 | PhiDest->addIncoming(ElemPtr.getPointer(), CurrentBB); |
2538 | 3 | Ptr = Address(PhiSrc, Ptr.getAlignment()); |
2539 | 3 | ElemPtr = Address(PhiDest, ElemPtr.getAlignment()); |
2540 | 3 | llvm::Value *PtrDiff = Bld.CreatePtrDiff( |
2541 | 3 | PtrEnd.getPointer(), Bld.CreatePointerBitCastOrAddrSpaceCast( |
2542 | 3 | Ptr.getPointer(), CGF.VoidPtrTy)); |
2543 | 3 | Bld.CreateCondBr(Bld.CreateICmpSGT(PtrDiff, Bld.getInt64(IntSize - 1)), |
2544 | 3 | ThenBB, ExitBB); |
2545 | 3 | CGF.EmitBlock(ThenBB); |
2546 | 3 | llvm::Value *Res = createRuntimeShuffleFunction( |
2547 | 3 | CGF, |
2548 | 3 | CGF.EmitLoadOfScalar(Ptr, /*Volatile=*/false, IntType, Loc, |
2549 | 3 | LValueBaseInfo(AlignmentSource::Type), |
2550 | 3 | TBAAAccessInfo()), |
2551 | 3 | IntType, Offset, Loc); |
2552 | 3 | CGF.EmitStoreOfScalar(Res, ElemPtr, /*Volatile=*/false, IntType, |
2553 | 3 | LValueBaseInfo(AlignmentSource::Type), |
2554 | 3 | TBAAAccessInfo()); |
2555 | 3 | Address LocalPtr = Bld.CreateConstGEP(Ptr, 1); |
2556 | 3 | Address LocalElemPtr = Bld.CreateConstGEP(ElemPtr, 1); |
2557 | 3 | PhiSrc->addIncoming(LocalPtr.getPointer(), ThenBB); |
2558 | 3 | PhiDest->addIncoming(LocalElemPtr.getPointer(), ThenBB); |
2559 | 3 | CGF.EmitBranch(PreCondBB); |
2560 | 3 | CGF.EmitBlock(ExitBB); |
2561 | 60 | } else { |
2562 | 60 | llvm::Value *Res = createRuntimeShuffleFunction( |
2563 | 60 | CGF, |
2564 | 60 | CGF.EmitLoadOfScalar(Ptr, /*Volatile=*/false, IntType, Loc, |
2565 | 60 | LValueBaseInfo(AlignmentSource::Type), |
2566 | 60 | TBAAAccessInfo()), |
2567 | 60 | IntType, Offset, Loc); |
2568 | 60 | CGF.EmitStoreOfScalar(Res, ElemPtr, /*Volatile=*/false, IntType, |
2569 | 60 | LValueBaseInfo(AlignmentSource::Type), |
2570 | 60 | TBAAAccessInfo()); |
2571 | 60 | Ptr = Bld.CreateConstGEP(Ptr, 1); |
2572 | 60 | ElemPtr = Bld.CreateConstGEP(ElemPtr, 1); |
2573 | 60 | } |
2574 | 63 | Size = Size % IntSize; |
2575 | 63 | } |
2576 | 63 | } |
2577 | | |
2578 | | namespace { |
2579 | | enum CopyAction : unsigned { |
2580 | | // RemoteLaneToThread: Copy over a Reduce list from a remote lane in |
2581 | | // the warp using shuffle instructions. |
2582 | | RemoteLaneToThread, |
2583 | | // ThreadCopy: Make a copy of a Reduce list on the thread's stack. |
2584 | | ThreadCopy, |
2585 | | // ThreadToScratchpad: Copy a team-reduced array to the scratchpad. |
2586 | | ThreadToScratchpad, |
2587 | | // ScratchpadToThread: Copy from a scratchpad array in global memory |
2588 | | // containing team-reduced data to a thread's stack. |
2589 | | ScratchpadToThread, |
2590 | | }; |
2591 | | } // namespace |
2592 | | |
2593 | | struct CopyOptionsTy { |
2594 | | llvm::Value *RemoteLaneOffset; |
2595 | | llvm::Value *ScratchpadIndex; |
2596 | | llvm::Value *ScratchpadWidth; |
2597 | | }; |
2598 | | |
2599 | | /// Emit instructions to copy a Reduce list, which contains partially |
2600 | | /// aggregated values, in the specified direction. |
2601 | | static void emitReductionListCopy( |
2602 | | CopyAction Action, CodeGenFunction &CGF, QualType ReductionArrayTy, |
2603 | | ArrayRef<const Expr *> Privates, Address SrcBase, Address DestBase, |
2604 | 78 | CopyOptionsTy CopyOptions = {nullptr, nullptr, nullptr}) { |
2605 | | |
2606 | 78 | CodeGenModule &CGM = CGF.CGM; |
2607 | 78 | ASTContext &C = CGM.getContext(); |
2608 | 78 | CGBuilderTy &Bld = CGF.Builder; |
2609 | | |
2610 | 78 | llvm::Value *RemoteLaneOffset = CopyOptions.RemoteLaneOffset; |
2611 | 78 | llvm::Value *ScratchpadIndex = CopyOptions.ScratchpadIndex; |
2612 | 78 | llvm::Value *ScratchpadWidth = CopyOptions.ScratchpadWidth; |
2613 | | |
2614 | | // Iterates, element-by-element, through the source Reduce list and |
2615 | | // make a copy. |
2616 | 78 | unsigned Idx = 0; |
2617 | 78 | unsigned Size = Privates.size(); |
2618 | 126 | for (const Expr *Private : Privates) { |
2619 | 126 | Address SrcElementAddr = Address::invalid(); |
2620 | 126 | Address DestElementAddr = Address::invalid(); |
2621 | 126 | Address DestElementPtrAddr = Address::invalid(); |
2622 | | // Should we shuffle in an element from a remote lane? |
2623 | 126 | bool ShuffleInElement = false; |
2624 | | // Set to true to update the pointer in the dest Reduce list to a |
2625 | | // newly created element. |
2626 | 126 | bool UpdateDestListPtr = false; |
2627 | | // Increment the src or dest pointer to the scratchpad, for each |
2628 | | // new element. |
2629 | 126 | bool IncrScratchpadSrc = false; |
2630 | 126 | bool IncrScratchpadDest = false; |
2631 | | |
2632 | 126 | switch (Action) { |
2633 | 63 | case RemoteLaneToThread: { |
2634 | | // Step 1.1: Get the address for the src element in the Reduce list. |
2635 | 63 | Address SrcElementPtrAddr = Bld.CreateConstArrayGEP(SrcBase, Idx); |
2636 | 63 | SrcElementAddr = CGF.EmitLoadOfPointer( |
2637 | 63 | SrcElementPtrAddr, |
2638 | 63 | C.getPointerType(Private->getType())->castAs<PointerType>()); |
2639 | | |
2640 | | // Step 1.2: Create a temporary to store the element in the destination |
2641 | | // Reduce list. |
2642 | 63 | DestElementPtrAddr = Bld.CreateConstArrayGEP(DestBase, Idx); |
2643 | 63 | DestElementAddr = |
2644 | 63 | CGF.CreateMemTemp(Private->getType(), ".omp.reduction.element"); |
2645 | 63 | ShuffleInElement = true; |
2646 | 63 | UpdateDestListPtr = true; |
2647 | 63 | break; |
2648 | 0 | } |
2649 | 63 | case ThreadCopy: { |
2650 | | // Step 1.1: Get the address for the src element in the Reduce list. |
2651 | 63 | Address SrcElementPtrAddr = Bld.CreateConstArrayGEP(SrcBase, Idx); |
2652 | 63 | SrcElementAddr = CGF.EmitLoadOfPointer( |
2653 | 63 | SrcElementPtrAddr, |
2654 | 63 | C.getPointerType(Private->getType())->castAs<PointerType>()); |
2655 | | |
2656 | | // Step 1.2: Get the address for dest element. The destination |
2657 | | // element has already been created on the thread's stack. |
2658 | 63 | DestElementPtrAddr = Bld.CreateConstArrayGEP(DestBase, Idx); |
2659 | 63 | DestElementAddr = CGF.EmitLoadOfPointer( |
2660 | 63 | DestElementPtrAddr, |
2661 | 63 | C.getPointerType(Private->getType())->castAs<PointerType>()); |
2662 | 63 | break; |
2663 | 0 | } |
2664 | 0 | case ThreadToScratchpad: { |
2665 | | // Step 1.1: Get the address for the src element in the Reduce list. |
2666 | 0 | Address SrcElementPtrAddr = Bld.CreateConstArrayGEP(SrcBase, Idx); |
2667 | 0 | SrcElementAddr = CGF.EmitLoadOfPointer( |
2668 | 0 | SrcElementPtrAddr, |
2669 | 0 | C.getPointerType(Private->getType())->castAs<PointerType>()); |
2670 | | |
2671 | | // Step 1.2: Get the address for dest element: |
2672 | | // address = base + index * ElementSizeInChars. |
2673 | 0 | llvm::Value *ElementSizeInChars = CGF.getTypeSize(Private->getType()); |
2674 | 0 | llvm::Value *CurrentOffset = |
2675 | 0 | Bld.CreateNUWMul(ElementSizeInChars, ScratchpadIndex); |
2676 | 0 | llvm::Value *ScratchPadElemAbsolutePtrVal = |
2677 | 0 | Bld.CreateNUWAdd(DestBase.getPointer(), CurrentOffset); |
2678 | 0 | ScratchPadElemAbsolutePtrVal = |
2679 | 0 | Bld.CreateIntToPtr(ScratchPadElemAbsolutePtrVal, CGF.VoidPtrTy); |
2680 | 0 | DestElementAddr = Address(ScratchPadElemAbsolutePtrVal, |
2681 | 0 | C.getTypeAlignInChars(Private->getType())); |
2682 | 0 | IncrScratchpadDest = true; |
2683 | 0 | break; |
2684 | 0 | } |
2685 | 0 | case ScratchpadToThread: { |
2686 | | // Step 1.1: Get the address for the src element in the scratchpad. |
2687 | | // address = base + index * ElementSizeInChars. |
2688 | 0 | llvm::Value *ElementSizeInChars = CGF.getTypeSize(Private->getType()); |
2689 | 0 | llvm::Value *CurrentOffset = |
2690 | 0 | Bld.CreateNUWMul(ElementSizeInChars, ScratchpadIndex); |
2691 | 0 | llvm::Value *ScratchPadElemAbsolutePtrVal = |
2692 | 0 | Bld.CreateNUWAdd(SrcBase.getPointer(), CurrentOffset); |
2693 | 0 | ScratchPadElemAbsolutePtrVal = |
2694 | 0 | Bld.CreateIntToPtr(ScratchPadElemAbsolutePtrVal, CGF.VoidPtrTy); |
2695 | 0 | SrcElementAddr = Address(ScratchPadElemAbsolutePtrVal, |
2696 | 0 | C.getTypeAlignInChars(Private->getType())); |
2697 | 0 | IncrScratchpadSrc = true; |
2698 | | |
2699 | | // Step 1.2: Create a temporary to store the element in the destination |
2700 | | // Reduce list. |
2701 | 0 | DestElementPtrAddr = Bld.CreateConstArrayGEP(DestBase, Idx); |
2702 | 0 | DestElementAddr = |
2703 | 0 | CGF.CreateMemTemp(Private->getType(), ".omp.reduction.element"); |
2704 | 0 | UpdateDestListPtr = true; |
2705 | 0 | break; |
2706 | 126 | } |
2707 | 126 | } |
2708 | | |
2709 | | // Regardless of src and dest of copy, we emit the load of src |
2710 | | // element as this is required in all directions |
2711 | 126 | SrcElementAddr = Bld.CreateElementBitCast( |
2712 | 126 | SrcElementAddr, CGF.ConvertTypeForMem(Private->getType())); |
2713 | 126 | DestElementAddr = Bld.CreateElementBitCast(DestElementAddr, |
2714 | 126 | SrcElementAddr.getElementType()); |
2715 | | |
2716 | | // Now that all active lanes have read the element in the |
2717 | | // Reduce list, shuffle over the value from the remote lane. |
2718 | 126 | if (ShuffleInElement) { |
2719 | 63 | shuffleAndStore(CGF, SrcElementAddr, DestElementAddr, Private->getType(), |
2720 | 63 | RemoteLaneOffset, Private->getExprLoc()); |
2721 | 63 | } else { |
2722 | 63 | switch (CGF.getEvaluationKind(Private->getType())) { |
2723 | 57 | case TEK_Scalar: { |
2724 | 57 | llvm::Value *Elem = CGF.EmitLoadOfScalar( |
2725 | 57 | SrcElementAddr, /*Volatile=*/false, Private->getType(), |
2726 | 57 | Private->getExprLoc(), LValueBaseInfo(AlignmentSource::Type), |
2727 | 57 | TBAAAccessInfo()); |
2728 | | // Store the source element value to the dest element address. |
2729 | 57 | CGF.EmitStoreOfScalar( |
2730 | 57 | Elem, DestElementAddr, /*Volatile=*/false, Private->getType(), |
2731 | 57 | LValueBaseInfo(AlignmentSource::Type), TBAAAccessInfo()); |
2732 | 57 | break; |
2733 | 0 | } |
2734 | 0 | case TEK_Complex: { |
2735 | 0 | CodeGenFunction::ComplexPairTy Elem = CGF.EmitLoadOfComplex( |
2736 | 0 | CGF.MakeAddrLValue(SrcElementAddr, Private->getType()), |
2737 | 0 | Private->getExprLoc()); |
2738 | 0 | CGF.EmitStoreOfComplex( |
2739 | 0 | Elem, CGF.MakeAddrLValue(DestElementAddr, Private->getType()), |
2740 | 0 | /*isInit=*/false); |
2741 | 0 | break; |
2742 | 0 | } |
2743 | 6 | case TEK_Aggregate: |
2744 | 6 | CGF.EmitAggregateCopy( |
2745 | 6 | CGF.MakeAddrLValue(DestElementAddr, Private->getType()), |
2746 | 6 | CGF.MakeAddrLValue(SrcElementAddr, Private->getType()), |
2747 | 6 | Private->getType(), AggValueSlot::DoesNotOverlap); |
2748 | 6 | break; |
2749 | 126 | } |
2750 | 126 | } |
2751 | | |
2752 | | // Step 3.1: Modify reference in dest Reduce list as needed. |
2753 | | // Modifying the reference in Reduce list to point to the newly |
2754 | | // created element. The element is live in the current function |
2755 | | // scope and that of functions it invokes (i.e., reduce_function). |
2756 | | // RemoteReduceData[i] = (void*)&RemoteElem |
2757 | 126 | if (UpdateDestListPtr) { |
2758 | 63 | CGF.EmitStoreOfScalar(Bld.CreatePointerBitCastOrAddrSpaceCast( |
2759 | 63 | DestElementAddr.getPointer(), CGF.VoidPtrTy), |
2760 | 63 | DestElementPtrAddr, /*Volatile=*/false, |
2761 | 63 | C.VoidPtrTy); |
2762 | 63 | } |
2763 | | |
2764 | | // Step 4.1: Increment SrcBase/DestBase so that it points to the starting |
2765 | | // address of the next element in scratchpad memory, unless we're currently |
2766 | | // processing the last one. Memory alignment is also taken care of here. |
2767 | 126 | if ((IncrScratchpadDest || IncrScratchpadSrc) && (Idx + 1 < Size)0 ) { |
2768 | 0 | llvm::Value *ScratchpadBasePtr = |
2769 | 0 | IncrScratchpadDest ? DestBase.getPointer() : SrcBase.getPointer(); |
2770 | 0 | llvm::Value *ElementSizeInChars = CGF.getTypeSize(Private->getType()); |
2771 | 0 | ScratchpadBasePtr = Bld.CreateNUWAdd( |
2772 | 0 | ScratchpadBasePtr, |
2773 | 0 | Bld.CreateNUWMul(ScratchpadWidth, ElementSizeInChars)); |
2774 | | |
2775 | | // Take care of global memory alignment for performance |
2776 | 0 | ScratchpadBasePtr = Bld.CreateNUWSub( |
2777 | 0 | ScratchpadBasePtr, llvm::ConstantInt::get(CGM.SizeTy, 1)); |
2778 | 0 | ScratchpadBasePtr = Bld.CreateUDiv( |
2779 | 0 | ScratchpadBasePtr, |
2780 | 0 | llvm::ConstantInt::get(CGM.SizeTy, GlobalMemoryAlignment)); |
2781 | 0 | ScratchpadBasePtr = Bld.CreateNUWAdd( |
2782 | 0 | ScratchpadBasePtr, llvm::ConstantInt::get(CGM.SizeTy, 1)); |
2783 | 0 | ScratchpadBasePtr = Bld.CreateNUWMul( |
2784 | 0 | ScratchpadBasePtr, |
2785 | 0 | llvm::ConstantInt::get(CGM.SizeTy, GlobalMemoryAlignment)); |
2786 | |
|
2787 | 0 | if (IncrScratchpadDest) |
2788 | 0 | DestBase = Address(ScratchpadBasePtr, CGF.getPointerAlign()); |
2789 | 0 | else /* IncrScratchpadSrc = true */ |
2790 | 0 | SrcBase = Address(ScratchpadBasePtr, CGF.getPointerAlign()); |
2791 | 0 | } |
2792 | | |
2793 | 126 | ++Idx; |
2794 | 126 | } |
2795 | 78 | } |
2796 | | |
2797 | | /// This function emits a helper that gathers Reduce lists from the first |
2798 | | /// lane of every active warp to lanes in the first warp. |
2799 | | /// |
2800 | | /// void inter_warp_copy_func(void* reduce_data, num_warps) |
2801 | | /// shared smem[warp_size]; |
2802 | | /// For all data entries D in reduce_data: |
2803 | | /// sync |
2804 | | /// If (I am the first lane in each warp) |
2805 | | /// Copy my local D to smem[warp_id] |
2806 | | /// sync |
2807 | | /// if (I am the first warp) |
2808 | | /// Copy smem[thread_id] to my local D |
2809 | | static llvm::Value *emitInterWarpCopyFunction(CodeGenModule &CGM, |
2810 | | ArrayRef<const Expr *> Privates, |
2811 | | QualType ReductionArrayTy, |
2812 | 39 | SourceLocation Loc) { |
2813 | 39 | ASTContext &C = CGM.getContext(); |
2814 | 39 | llvm::Module &M = CGM.getModule(); |
2815 | | |
2816 | | // ReduceList: thread local Reduce list. |
2817 | | // At the stage of the computation when this function is called, partially |
2818 | | // aggregated values reside in the first lane of every active warp. |
2819 | 39 | ImplicitParamDecl ReduceListArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
2820 | 39 | C.VoidPtrTy, ImplicitParamDecl::Other); |
2821 | | // NumWarps: number of warps active in the parallel region. This could |
2822 | | // be smaller than 32 (max warps in a CTA) for partial block reduction. |
2823 | 39 | ImplicitParamDecl NumWarpsArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
2824 | 39 | C.getIntTypeForBitwidth(32, /* Signed */ true), |
2825 | 39 | ImplicitParamDecl::Other); |
2826 | 39 | FunctionArgList Args; |
2827 | 39 | Args.push_back(&ReduceListArg); |
2828 | 39 | Args.push_back(&NumWarpsArg); |
2829 | | |
2830 | 39 | const CGFunctionInfo &CGFI = |
2831 | 39 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args); |
2832 | 39 | auto *Fn = llvm::Function::Create(CGM.getTypes().GetFunctionType(CGFI), |
2833 | 39 | llvm::GlobalValue::InternalLinkage, |
2834 | 39 | "_omp_reduction_inter_warp_copy_func", &M); |
2835 | 39 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
2836 | 39 | Fn->setDoesNotRecurse(); |
2837 | 39 | CodeGenFunction CGF(CGM); |
2838 | 39 | CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc); |
2839 | | |
2840 | 39 | CGBuilderTy &Bld = CGF.Builder; |
2841 | | |
2842 | | // This array is used as a medium to transfer, one reduce element at a time, |
2843 | | // the data from the first lane of every warp to lanes in the first warp |
2844 | | // in order to perform the final step of a reduction in a parallel region |
2845 | | // (reduction across warps). The array is placed in NVPTX __shared__ memory |
2846 | | // for reduced latency, as well as to have a distinct copy for concurrently |
2847 | | // executing target regions. The array is declared with common linkage so |
2848 | | // as to be shared across compilation units. |
2849 | 39 | StringRef TransferMediumName = |
2850 | 39 | "__openmp_nvptx_data_transfer_temporary_storage"; |
2851 | 39 | llvm::GlobalVariable *TransferMedium = |
2852 | 39 | M.getGlobalVariable(TransferMediumName); |
2853 | 39 | unsigned WarpSize = CGF.getTarget().getGridValue(llvm::omp::GV_Warp_Size); |
2854 | 39 | if (!TransferMedium) { |
2855 | 12 | auto *Ty = llvm::ArrayType::get(CGM.Int32Ty, WarpSize); |
2856 | 12 | unsigned SharedAddressSpace = C.getTargetAddressSpace(LangAS::cuda_shared); |
2857 | 12 | TransferMedium = new llvm::GlobalVariable( |
2858 | 12 | M, Ty, /*isConstant=*/false, llvm::GlobalVariable::WeakAnyLinkage, |
2859 | 12 | llvm::UndefValue::get(Ty), TransferMediumName, |
2860 | 12 | /*InsertBefore=*/nullptr, llvm::GlobalVariable::NotThreadLocal, |
2861 | 12 | SharedAddressSpace); |
2862 | 12 | CGM.addCompilerUsedGlobal(TransferMedium); |
2863 | 12 | } |
2864 | | |
2865 | 39 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
2866 | | // Get the CUDA thread id of the current OpenMP thread on the GPU. |
2867 | 39 | llvm::Value *ThreadID = RT.getGPUThreadID(CGF); |
2868 | | // nvptx_lane_id = nvptx_id % warpsize |
2869 | 39 | llvm::Value *LaneID = getNVPTXLaneID(CGF); |
2870 | | // nvptx_warp_id = nvptx_id / warpsize |
2871 | 39 | llvm::Value *WarpID = getNVPTXWarpID(CGF); |
2872 | | |
2873 | 39 | Address AddrReduceListArg = CGF.GetAddrOfLocalVar(&ReduceListArg); |
2874 | 39 | Address LocalReduceList( |
2875 | 39 | Bld.CreatePointerBitCastOrAddrSpaceCast( |
2876 | 39 | CGF.EmitLoadOfScalar( |
2877 | 39 | AddrReduceListArg, /*Volatile=*/false, C.VoidPtrTy, Loc, |
2878 | 39 | LValueBaseInfo(AlignmentSource::Type), TBAAAccessInfo()), |
2879 | 39 | CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo()), |
2880 | 39 | CGF.getPointerAlign()); |
2881 | | |
2882 | 39 | unsigned Idx = 0; |
2883 | 63 | for (const Expr *Private : Privates) { |
2884 | | // |
2885 | | // Warp master copies reduce element to transfer medium in __shared__ |
2886 | | // memory. |
2887 | | // |
2888 | 63 | unsigned RealTySize = |
2889 | 63 | C.getTypeSizeInChars(Private->getType()) |
2890 | 63 | .alignTo(C.getTypeAlignInChars(Private->getType())) |
2891 | 63 | .getQuantity(); |
2892 | 159 | for (unsigned TySize = 4; TySize > 0 && RealTySize > 0150 ; TySize /=296 ) { |
2893 | 96 | unsigned NumIters = RealTySize / TySize; |
2894 | 96 | if (NumIters == 0) |
2895 | 33 | continue; |
2896 | 63 | QualType CType = C.getIntTypeForBitwidth( |
2897 | 63 | C.toBits(CharUnits::fromQuantity(TySize)), /*Signed=*/1); |
2898 | 63 | llvm::Type *CopyType = CGF.ConvertTypeForMem(CType); |
2899 | 63 | CharUnits Align = CharUnits::fromQuantity(TySize); |
2900 | 63 | llvm::Value *Cnt = nullptr; |
2901 | 63 | Address CntAddr = Address::invalid(); |
2902 | 63 | llvm::BasicBlock *PrecondBB = nullptr; |
2903 | 63 | llvm::BasicBlock *ExitBB = nullptr; |
2904 | 63 | if (NumIters > 1) { |
2905 | 15 | CntAddr = CGF.CreateMemTemp(C.IntTy, ".cnt.addr"); |
2906 | 15 | CGF.EmitStoreOfScalar(llvm::Constant::getNullValue(CGM.IntTy), CntAddr, |
2907 | 15 | /*Volatile=*/false, C.IntTy); |
2908 | 15 | PrecondBB = CGF.createBasicBlock("precond"); |
2909 | 15 | ExitBB = CGF.createBasicBlock("exit"); |
2910 | 15 | llvm::BasicBlock *BodyBB = CGF.createBasicBlock("body"); |
2911 | | // There is no need to emit line number for unconditional branch. |
2912 | 15 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
2913 | 15 | CGF.EmitBlock(PrecondBB); |
2914 | 15 | Cnt = CGF.EmitLoadOfScalar(CntAddr, /*Volatile=*/false, C.IntTy, Loc); |
2915 | 15 | llvm::Value *Cmp = |
2916 | 15 | Bld.CreateICmpULT(Cnt, llvm::ConstantInt::get(CGM.IntTy, NumIters)); |
2917 | 15 | Bld.CreateCondBr(Cmp, BodyBB, ExitBB); |
2918 | 15 | CGF.EmitBlock(BodyBB); |
2919 | 15 | } |
2920 | | // kmpc_barrier. |
2921 | 63 | CGM.getOpenMPRuntime().emitBarrierCall(CGF, Loc, OMPD_unknown, |
2922 | 63 | /*EmitChecks=*/false, |
2923 | 63 | /*ForceSimpleCall=*/true); |
2924 | 63 | llvm::BasicBlock *ThenBB = CGF.createBasicBlock("then"); |
2925 | 63 | llvm::BasicBlock *ElseBB = CGF.createBasicBlock("else"); |
2926 | 63 | llvm::BasicBlock *MergeBB = CGF.createBasicBlock("ifcont"); |
2927 | | |
2928 | | // if (lane_id == 0) |
2929 | 63 | llvm::Value *IsWarpMaster = Bld.CreateIsNull(LaneID, "warp_master"); |
2930 | 63 | Bld.CreateCondBr(IsWarpMaster, ThenBB, ElseBB); |
2931 | 63 | CGF.EmitBlock(ThenBB); |
2932 | | |
2933 | | // Reduce element = LocalReduceList[i] |
2934 | 63 | Address ElemPtrPtrAddr = Bld.CreateConstArrayGEP(LocalReduceList, Idx); |
2935 | 63 | llvm::Value *ElemPtrPtr = CGF.EmitLoadOfScalar( |
2936 | 63 | ElemPtrPtrAddr, /*Volatile=*/false, C.VoidPtrTy, SourceLocation()); |
2937 | | // elemptr = ((CopyType*)(elemptrptr)) + I |
2938 | 63 | Address ElemPtr = Address(ElemPtrPtr, Align); |
2939 | 63 | ElemPtr = Bld.CreateElementBitCast(ElemPtr, CopyType); |
2940 | 63 | if (NumIters > 1) { |
2941 | 15 | ElemPtr = Address(Bld.CreateGEP(ElemPtr.getPointer(), Cnt), |
2942 | 15 | ElemPtr.getAlignment()); |
2943 | 15 | } |
2944 | | |
2945 | | // Get pointer to location in transfer medium. |
2946 | | // MediumPtr = &medium[warp_id] |
2947 | 63 | llvm::Value *MediumPtrVal = Bld.CreateInBoundsGEP( |
2948 | 63 | TransferMedium, {llvm::Constant::getNullValue(CGM.Int64Ty), WarpID}); |
2949 | 63 | Address MediumPtr(MediumPtrVal, Align); |
2950 | | // Casting to actual data type. |
2951 | | // MediumPtr = (CopyType*)MediumPtrAddr; |
2952 | 63 | MediumPtr = Bld.CreateElementBitCast(MediumPtr, CopyType); |
2953 | | |
2954 | | // elem = *elemptr |
2955 | | //*MediumPtr = elem |
2956 | 63 | llvm::Value *Elem = CGF.EmitLoadOfScalar( |
2957 | 63 | ElemPtr, /*Volatile=*/false, CType, Loc, |
2958 | 63 | LValueBaseInfo(AlignmentSource::Type), TBAAAccessInfo()); |
2959 | | // Store the source element value to the dest element address. |
2960 | 63 | CGF.EmitStoreOfScalar(Elem, MediumPtr, /*Volatile=*/true, CType, |
2961 | 63 | LValueBaseInfo(AlignmentSource::Type), |
2962 | 63 | TBAAAccessInfo()); |
2963 | | |
2964 | 63 | Bld.CreateBr(MergeBB); |
2965 | | |
2966 | 63 | CGF.EmitBlock(ElseBB); |
2967 | 63 | Bld.CreateBr(MergeBB); |
2968 | | |
2969 | 63 | CGF.EmitBlock(MergeBB); |
2970 | | |
2971 | | // kmpc_barrier. |
2972 | 63 | CGM.getOpenMPRuntime().emitBarrierCall(CGF, Loc, OMPD_unknown, |
2973 | 63 | /*EmitChecks=*/false, |
2974 | 63 | /*ForceSimpleCall=*/true); |
2975 | | |
2976 | | // |
2977 | | // Warp 0 copies reduce element from transfer medium. |
2978 | | // |
2979 | 63 | llvm::BasicBlock *W0ThenBB = CGF.createBasicBlock("then"); |
2980 | 63 | llvm::BasicBlock *W0ElseBB = CGF.createBasicBlock("else"); |
2981 | 63 | llvm::BasicBlock *W0MergeBB = CGF.createBasicBlock("ifcont"); |
2982 | | |
2983 | 63 | Address AddrNumWarpsArg = CGF.GetAddrOfLocalVar(&NumWarpsArg); |
2984 | 63 | llvm::Value *NumWarpsVal = CGF.EmitLoadOfScalar( |
2985 | 63 | AddrNumWarpsArg, /*Volatile=*/false, C.IntTy, Loc); |
2986 | | |
2987 | | // Up to 32 threads in warp 0 are active. |
2988 | 63 | llvm::Value *IsActiveThread = |
2989 | 63 | Bld.CreateICmpULT(ThreadID, NumWarpsVal, "is_active_thread"); |
2990 | 63 | Bld.CreateCondBr(IsActiveThread, W0ThenBB, W0ElseBB); |
2991 | | |
2992 | 63 | CGF.EmitBlock(W0ThenBB); |
2993 | | |
2994 | | // SrcMediumPtr = &medium[tid] |
2995 | 63 | llvm::Value *SrcMediumPtrVal = Bld.CreateInBoundsGEP( |
2996 | 63 | TransferMedium, |
2997 | 63 | {llvm::Constant::getNullValue(CGM.Int64Ty), ThreadID}); |
2998 | 63 | Address SrcMediumPtr(SrcMediumPtrVal, Align); |
2999 | | // SrcMediumVal = *SrcMediumPtr; |
3000 | 63 | SrcMediumPtr = Bld.CreateElementBitCast(SrcMediumPtr, CopyType); |
3001 | | |
3002 | | // TargetElemPtr = (CopyType*)(SrcDataAddr[i]) + I |
3003 | 63 | Address TargetElemPtrPtr = Bld.CreateConstArrayGEP(LocalReduceList, Idx); |
3004 | 63 | llvm::Value *TargetElemPtrVal = CGF.EmitLoadOfScalar( |
3005 | 63 | TargetElemPtrPtr, /*Volatile=*/false, C.VoidPtrTy, Loc); |
3006 | 63 | Address TargetElemPtr = Address(TargetElemPtrVal, Align); |
3007 | 63 | TargetElemPtr = Bld.CreateElementBitCast(TargetElemPtr, CopyType); |
3008 | 63 | if (NumIters > 1) { |
3009 | 15 | TargetElemPtr = Address(Bld.CreateGEP(TargetElemPtr.getPointer(), Cnt), |
3010 | 15 | TargetElemPtr.getAlignment()); |
3011 | 15 | } |
3012 | | |
3013 | | // *TargetElemPtr = SrcMediumVal; |
3014 | 63 | llvm::Value *SrcMediumValue = |
3015 | 63 | CGF.EmitLoadOfScalar(SrcMediumPtr, /*Volatile=*/true, CType, Loc); |
3016 | 63 | CGF.EmitStoreOfScalar(SrcMediumValue, TargetElemPtr, /*Volatile=*/false, |
3017 | 63 | CType); |
3018 | 63 | Bld.CreateBr(W0MergeBB); |
3019 | | |
3020 | 63 | CGF.EmitBlock(W0ElseBB); |
3021 | 63 | Bld.CreateBr(W0MergeBB); |
3022 | | |
3023 | 63 | CGF.EmitBlock(W0MergeBB); |
3024 | | |
3025 | 63 | if (NumIters > 1) { |
3026 | 15 | Cnt = Bld.CreateNSWAdd(Cnt, llvm::ConstantInt::get(CGM.IntTy, /*V=*/1)); |
3027 | 15 | CGF.EmitStoreOfScalar(Cnt, CntAddr, /*Volatile=*/false, C.IntTy); |
3028 | 15 | CGF.EmitBranch(PrecondBB); |
3029 | 15 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
3030 | 15 | CGF.EmitBlock(ExitBB); |
3031 | 15 | } |
3032 | 63 | RealTySize %= TySize; |
3033 | 63 | } |
3034 | 63 | ++Idx; |
3035 | 63 | } |
3036 | | |
3037 | 39 | CGF.FinishFunction(); |
3038 | 39 | return Fn; |
3039 | 39 | } |
3040 | | |
3041 | | /// Emit a helper that reduces data across two OpenMP threads (lanes) |
3042 | | /// in the same warp. It uses shuffle instructions to copy over data from |
3043 | | /// a remote lane's stack. The reduction algorithm performed is specified |
3044 | | /// by the fourth parameter. |
3045 | | /// |
3046 | | /// Algorithm Versions. |
3047 | | /// Full Warp Reduce (argument value 0): |
3048 | | /// This algorithm assumes that all 32 lanes are active and gathers |
3049 | | /// data from these 32 lanes, producing a single resultant value. |
3050 | | /// Contiguous Partial Warp Reduce (argument value 1): |
3051 | | /// This algorithm assumes that only a *contiguous* subset of lanes |
3052 | | /// are active. This happens for the last warp in a parallel region |
3053 | | /// when the user specified num_threads is not an integer multiple of |
3054 | | /// 32. This contiguous subset always starts with the zeroth lane. |
3055 | | /// Partial Warp Reduce (argument value 2): |
3056 | | /// This algorithm gathers data from any number of lanes at any position. |
3057 | | /// All reduced values are stored in the lowest possible lane. The set |
3058 | | /// of problems every algorithm addresses is a super set of those |
3059 | | /// addressable by algorithms with a lower version number. Overhead |
3060 | | /// increases as algorithm version increases. |
3061 | | /// |
3062 | | /// Terminology |
3063 | | /// Reduce element: |
3064 | | /// Reduce element refers to the individual data field with primitive |
3065 | | /// data types to be combined and reduced across threads. |
3066 | | /// Reduce list: |
3067 | | /// Reduce list refers to a collection of local, thread-private |
3068 | | /// reduce elements. |
3069 | | /// Remote Reduce list: |
3070 | | /// Remote Reduce list refers to a collection of remote (relative to |
3071 | | /// the current thread) reduce elements. |
3072 | | /// |
3073 | | /// We distinguish between three states of threads that are important to |
3074 | | /// the implementation of this function. |
3075 | | /// Alive threads: |
3076 | | /// Threads in a warp executing the SIMT instruction, as distinguished from |
3077 | | /// threads that are inactive due to divergent control flow. |
3078 | | /// Active threads: |
3079 | | /// The minimal set of threads that has to be alive upon entry to this |
3080 | | /// function. The computation is correct iff active threads are alive. |
3081 | | /// Some threads are alive but they are not active because they do not |
3082 | | /// contribute to the computation in any useful manner. Turning them off |
3083 | | /// may introduce control flow overheads without any tangible benefits. |
3084 | | /// Effective threads: |
3085 | | /// In order to comply with the argument requirements of the shuffle |
3086 | | /// function, we must keep all lanes holding data alive. But at most |
3087 | | /// half of them perform value aggregation; we refer to this half of |
3088 | | /// threads as effective. The other half is simply handing off their |
3089 | | /// data. |
3090 | | /// |
3091 | | /// Procedure |
3092 | | /// Value shuffle: |
3093 | | /// In this step active threads transfer data from higher lane positions |
3094 | | /// in the warp to lower lane positions, creating Remote Reduce list. |
3095 | | /// Value aggregation: |
3096 | | /// In this step, effective threads combine their thread local Reduce list |
3097 | | /// with Remote Reduce list and store the result in the thread local |
3098 | | /// Reduce list. |
3099 | | /// Value copy: |
3100 | | /// In this step, we deal with the assumption made by algorithm 2 |
3101 | | /// (i.e. contiguity assumption). When we have an odd number of lanes |
3102 | | /// active, say 2k+1, only k threads will be effective and therefore k |
3103 | | /// new values will be produced. However, the Reduce list owned by the |
3104 | | /// (2k+1)th thread is ignored in the value aggregation. Therefore |
3105 | | /// we copy the Reduce list from the (2k+1)th lane to (k+1)th lane so |
3106 | | /// that the contiguity assumption still holds. |
3107 | | static llvm::Function *emitShuffleAndReduceFunction( |
3108 | | CodeGenModule &CGM, ArrayRef<const Expr *> Privates, |
3109 | 39 | QualType ReductionArrayTy, llvm::Function *ReduceFn, SourceLocation Loc) { |
3110 | 39 | ASTContext &C = CGM.getContext(); |
3111 | | |
3112 | | // Thread local Reduce list used to host the values of data to be reduced. |
3113 | 39 | ImplicitParamDecl ReduceListArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3114 | 39 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3115 | | // Current lane id; could be logical. |
3116 | 39 | ImplicitParamDecl LaneIDArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.ShortTy, |
3117 | 39 | ImplicitParamDecl::Other); |
3118 | | // Offset of the remote source lane relative to the current lane. |
3119 | 39 | ImplicitParamDecl RemoteLaneOffsetArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3120 | 39 | C.ShortTy, ImplicitParamDecl::Other); |
3121 | | // Algorithm version. This is expected to be known at compile time. |
3122 | 39 | ImplicitParamDecl AlgoVerArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3123 | 39 | C.ShortTy, ImplicitParamDecl::Other); |
3124 | 39 | FunctionArgList Args; |
3125 | 39 | Args.push_back(&ReduceListArg); |
3126 | 39 | Args.push_back(&LaneIDArg); |
3127 | 39 | Args.push_back(&RemoteLaneOffsetArg); |
3128 | 39 | Args.push_back(&AlgoVerArg); |
3129 | | |
3130 | 39 | const CGFunctionInfo &CGFI = |
3131 | 39 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args); |
3132 | 39 | auto *Fn = llvm::Function::Create( |
3133 | 39 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
3134 | 39 | "_omp_reduction_shuffle_and_reduce_func", &CGM.getModule()); |
3135 | 39 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
3136 | 39 | Fn->setDoesNotRecurse(); |
3137 | 39 | if (CGM.getLangOpts().Optimize) { |
3138 | 6 | Fn->removeFnAttr(llvm::Attribute::NoInline); |
3139 | 6 | Fn->removeFnAttr(llvm::Attribute::OptimizeNone); |
3140 | 6 | Fn->addFnAttr(llvm::Attribute::AlwaysInline); |
3141 | 6 | } |
3142 | | |
3143 | 39 | CodeGenFunction CGF(CGM); |
3144 | 39 | CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc); |
3145 | | |
3146 | 39 | CGBuilderTy &Bld = CGF.Builder; |
3147 | | |
3148 | 39 | Address AddrReduceListArg = CGF.GetAddrOfLocalVar(&ReduceListArg); |
3149 | 39 | Address LocalReduceList( |
3150 | 39 | Bld.CreatePointerBitCastOrAddrSpaceCast( |
3151 | 39 | CGF.EmitLoadOfScalar(AddrReduceListArg, /*Volatile=*/false, |
3152 | 39 | C.VoidPtrTy, SourceLocation()), |
3153 | 39 | CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo()), |
3154 | 39 | CGF.getPointerAlign()); |
3155 | | |
3156 | 39 | Address AddrLaneIDArg = CGF.GetAddrOfLocalVar(&LaneIDArg); |
3157 | 39 | llvm::Value *LaneIDArgVal = CGF.EmitLoadOfScalar( |
3158 | 39 | AddrLaneIDArg, /*Volatile=*/false, C.ShortTy, SourceLocation()); |
3159 | | |
3160 | 39 | Address AddrRemoteLaneOffsetArg = CGF.GetAddrOfLocalVar(&RemoteLaneOffsetArg); |
3161 | 39 | llvm::Value *RemoteLaneOffsetArgVal = CGF.EmitLoadOfScalar( |
3162 | 39 | AddrRemoteLaneOffsetArg, /*Volatile=*/false, C.ShortTy, SourceLocation()); |
3163 | | |
3164 | 39 | Address AddrAlgoVerArg = CGF.GetAddrOfLocalVar(&AlgoVerArg); |
3165 | 39 | llvm::Value *AlgoVerArgVal = CGF.EmitLoadOfScalar( |
3166 | 39 | AddrAlgoVerArg, /*Volatile=*/false, C.ShortTy, SourceLocation()); |
3167 | | |
3168 | | // Create a local thread-private variable to host the Reduce list |
3169 | | // from a remote lane. |
3170 | 39 | Address RemoteReduceList = |
3171 | 39 | CGF.CreateMemTemp(ReductionArrayTy, ".omp.reduction.remote_reduce_list"); |
3172 | | |
3173 | | // This loop iterates through the list of reduce elements and copies, |
3174 | | // element by element, from a remote lane in the warp to RemoteReduceList, |
3175 | | // hosted on the thread's stack. |
3176 | 39 | emitReductionListCopy(RemoteLaneToThread, CGF, ReductionArrayTy, Privates, |
3177 | 39 | LocalReduceList, RemoteReduceList, |
3178 | 39 | {/*RemoteLaneOffset=*/RemoteLaneOffsetArgVal, |
3179 | 39 | /*ScratchpadIndex=*/nullptr, |
3180 | 39 | /*ScratchpadWidth=*/nullptr}); |
3181 | | |
3182 | | // The actions to be performed on the Remote Reduce list is dependent |
3183 | | // on the algorithm version. |
3184 | | // |
3185 | | // if (AlgoVer==0) || (AlgoVer==1 && (LaneId < Offset)) || (AlgoVer==2 && |
3186 | | // LaneId % 2 == 0 && Offset > 0): |
3187 | | // do the reduction value aggregation |
3188 | | // |
3189 | | // The thread local variable Reduce list is mutated in place to host the |
3190 | | // reduced data, which is the aggregated value produced from local and |
3191 | | // remote lanes. |
3192 | | // |
3193 | | // Note that AlgoVer is expected to be a constant integer known at compile |
3194 | | // time. |
3195 | | // When AlgoVer==0, the first conjunction evaluates to true, making |
3196 | | // the entire predicate true during compile time. |
3197 | | // When AlgoVer==1, the second conjunction has only the second part to be |
3198 | | // evaluated during runtime. Other conjunctions evaluates to false |
3199 | | // during compile time. |
3200 | | // When AlgoVer==2, the third conjunction has only the second part to be |
3201 | | // evaluated during runtime. Other conjunctions evaluates to false |
3202 | | // during compile time. |
3203 | 39 | llvm::Value *CondAlgo0 = Bld.CreateIsNull(AlgoVerArgVal); |
3204 | | |
3205 | 39 | llvm::Value *Algo1 = Bld.CreateICmpEQ(AlgoVerArgVal, Bld.getInt16(1)); |
3206 | 39 | llvm::Value *CondAlgo1 = Bld.CreateAnd( |
3207 | 39 | Algo1, Bld.CreateICmpULT(LaneIDArgVal, RemoteLaneOffsetArgVal)); |
3208 | | |
3209 | 39 | llvm::Value *Algo2 = Bld.CreateICmpEQ(AlgoVerArgVal, Bld.getInt16(2)); |
3210 | 39 | llvm::Value *CondAlgo2 = Bld.CreateAnd( |
3211 | 39 | Algo2, Bld.CreateIsNull(Bld.CreateAnd(LaneIDArgVal, Bld.getInt16(1)))); |
3212 | 39 | CondAlgo2 = Bld.CreateAnd( |
3213 | 39 | CondAlgo2, Bld.CreateICmpSGT(RemoteLaneOffsetArgVal, Bld.getInt16(0))); |
3214 | | |
3215 | 39 | llvm::Value *CondReduce = Bld.CreateOr(CondAlgo0, CondAlgo1); |
3216 | 39 | CondReduce = Bld.CreateOr(CondReduce, CondAlgo2); |
3217 | | |
3218 | 39 | llvm::BasicBlock *ThenBB = CGF.createBasicBlock("then"); |
3219 | 39 | llvm::BasicBlock *ElseBB = CGF.createBasicBlock("else"); |
3220 | 39 | llvm::BasicBlock *MergeBB = CGF.createBasicBlock("ifcont"); |
3221 | 39 | Bld.CreateCondBr(CondReduce, ThenBB, ElseBB); |
3222 | | |
3223 | 39 | CGF.EmitBlock(ThenBB); |
3224 | | // reduce_function(LocalReduceList, RemoteReduceList) |
3225 | 39 | llvm::Value *LocalReduceListPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3226 | 39 | LocalReduceList.getPointer(), CGF.VoidPtrTy); |
3227 | 39 | llvm::Value *RemoteReduceListPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3228 | 39 | RemoteReduceList.getPointer(), CGF.VoidPtrTy); |
3229 | 39 | CGM.getOpenMPRuntime().emitOutlinedFunctionCall( |
3230 | 39 | CGF, Loc, ReduceFn, {LocalReduceListPtr, RemoteReduceListPtr}); |
3231 | 39 | Bld.CreateBr(MergeBB); |
3232 | | |
3233 | 39 | CGF.EmitBlock(ElseBB); |
3234 | 39 | Bld.CreateBr(MergeBB); |
3235 | | |
3236 | 39 | CGF.EmitBlock(MergeBB); |
3237 | | |
3238 | | // if (AlgoVer==1 && (LaneId >= Offset)) copy Remote Reduce list to local |
3239 | | // Reduce list. |
3240 | 39 | Algo1 = Bld.CreateICmpEQ(AlgoVerArgVal, Bld.getInt16(1)); |
3241 | 39 | llvm::Value *CondCopy = Bld.CreateAnd( |
3242 | 39 | Algo1, Bld.CreateICmpUGE(LaneIDArgVal, RemoteLaneOffsetArgVal)); |
3243 | | |
3244 | 39 | llvm::BasicBlock *CpyThenBB = CGF.createBasicBlock("then"); |
3245 | 39 | llvm::BasicBlock *CpyElseBB = CGF.createBasicBlock("else"); |
3246 | 39 | llvm::BasicBlock *CpyMergeBB = CGF.createBasicBlock("ifcont"); |
3247 | 39 | Bld.CreateCondBr(CondCopy, CpyThenBB, CpyElseBB); |
3248 | | |
3249 | 39 | CGF.EmitBlock(CpyThenBB); |
3250 | 39 | emitReductionListCopy(ThreadCopy, CGF, ReductionArrayTy, Privates, |
3251 | 39 | RemoteReduceList, LocalReduceList); |
3252 | 39 | Bld.CreateBr(CpyMergeBB); |
3253 | | |
3254 | 39 | CGF.EmitBlock(CpyElseBB); |
3255 | 39 | Bld.CreateBr(CpyMergeBB); |
3256 | | |
3257 | 39 | CGF.EmitBlock(CpyMergeBB); |
3258 | | |
3259 | 39 | CGF.FinishFunction(); |
3260 | 39 | return Fn; |
3261 | 39 | } |
3262 | | |
3263 | | /// This function emits a helper that copies all the reduction variables from |
3264 | | /// the team into the provided global buffer for the reduction variables. |
3265 | | /// |
3266 | | /// void list_to_global_copy_func(void *buffer, int Idx, void *reduce_data) |
3267 | | /// For all data entries D in reduce_data: |
3268 | | /// Copy local D to buffer.D[Idx] |
3269 | | static llvm::Value *emitListToGlobalCopyFunction( |
3270 | | CodeGenModule &CGM, ArrayRef<const Expr *> Privates, |
3271 | | QualType ReductionArrayTy, SourceLocation Loc, |
3272 | | const RecordDecl *TeamReductionRec, |
3273 | | const llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
3274 | 18 | &VarFieldMap) { |
3275 | 18 | ASTContext &C = CGM.getContext(); |
3276 | | |
3277 | | // Buffer: global reduction buffer. |
3278 | 18 | ImplicitParamDecl BufferArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3279 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3280 | | // Idx: index of the buffer. |
3281 | 18 | ImplicitParamDecl IdxArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.IntTy, |
3282 | 18 | ImplicitParamDecl::Other); |
3283 | | // ReduceList: thread local Reduce list. |
3284 | 18 | ImplicitParamDecl ReduceListArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3285 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3286 | 18 | FunctionArgList Args; |
3287 | 18 | Args.push_back(&BufferArg); |
3288 | 18 | Args.push_back(&IdxArg); |
3289 | 18 | Args.push_back(&ReduceListArg); |
3290 | | |
3291 | 18 | const CGFunctionInfo &CGFI = |
3292 | 18 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args); |
3293 | 18 | auto *Fn = llvm::Function::Create( |
3294 | 18 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
3295 | 18 | "_omp_reduction_list_to_global_copy_func", &CGM.getModule()); |
3296 | 18 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
3297 | 18 | Fn->setDoesNotRecurse(); |
3298 | 18 | CodeGenFunction CGF(CGM); |
3299 | 18 | CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc); |
3300 | | |
3301 | 18 | CGBuilderTy &Bld = CGF.Builder; |
3302 | | |
3303 | 18 | Address AddrReduceListArg = CGF.GetAddrOfLocalVar(&ReduceListArg); |
3304 | 18 | Address AddrBufferArg = CGF.GetAddrOfLocalVar(&BufferArg); |
3305 | 18 | Address LocalReduceList( |
3306 | 18 | Bld.CreatePointerBitCastOrAddrSpaceCast( |
3307 | 18 | CGF.EmitLoadOfScalar(AddrReduceListArg, /*Volatile=*/false, |
3308 | 18 | C.VoidPtrTy, Loc), |
3309 | 18 | CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo()), |
3310 | 18 | CGF.getPointerAlign()); |
3311 | 18 | QualType StaticTy = C.getRecordType(TeamReductionRec); |
3312 | 18 | llvm::Type *LLVMReductionsBufferTy = |
3313 | 18 | CGM.getTypes().ConvertTypeForMem(StaticTy); |
3314 | 18 | llvm::Value *BufferArrPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3315 | 18 | CGF.EmitLoadOfScalar(AddrBufferArg, /*Volatile=*/false, C.VoidPtrTy, Loc), |
3316 | 18 | LLVMReductionsBufferTy->getPointerTo()); |
3317 | 18 | llvm::Value *Idxs[] = {llvm::ConstantInt::getNullValue(CGF.Int32Ty), |
3318 | 18 | CGF.EmitLoadOfScalar(CGF.GetAddrOfLocalVar(&IdxArg), |
3319 | 18 | /*Volatile=*/false, C.IntTy, |
3320 | 18 | Loc)}; |
3321 | 18 | unsigned Idx = 0; |
3322 | 30 | for (const Expr *Private : Privates) { |
3323 | | // Reduce element = LocalReduceList[i] |
3324 | 30 | Address ElemPtrPtrAddr = Bld.CreateConstArrayGEP(LocalReduceList, Idx); |
3325 | 30 | llvm::Value *ElemPtrPtr = CGF.EmitLoadOfScalar( |
3326 | 30 | ElemPtrPtrAddr, /*Volatile=*/false, C.VoidPtrTy, SourceLocation()); |
3327 | | // elemptr = ((CopyType*)(elemptrptr)) + I |
3328 | 30 | ElemPtrPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3329 | 30 | ElemPtrPtr, CGF.ConvertTypeForMem(Private->getType())->getPointerTo()); |
3330 | 30 | Address ElemPtr = |
3331 | 30 | Address(ElemPtrPtr, C.getTypeAlignInChars(Private->getType())); |
3332 | 30 | const ValueDecl *VD = cast<DeclRefExpr>(Private)->getDecl(); |
3333 | | // Global = Buffer.VD[Idx]; |
3334 | 30 | const FieldDecl *FD = VarFieldMap.lookup(VD); |
3335 | 30 | LValue GlobLVal = CGF.EmitLValueForField( |
3336 | 30 | CGF.MakeNaturalAlignAddrLValue(BufferArrPtr, StaticTy), FD); |
3337 | 30 | llvm::Value *BufferPtr = |
3338 | 30 | Bld.CreateInBoundsGEP(GlobLVal.getPointer(CGF), Idxs); |
3339 | 30 | GlobLVal.setAddress(Address(BufferPtr, GlobLVal.getAlignment())); |
3340 | 30 | switch (CGF.getEvaluationKind(Private->getType())) { |
3341 | 30 | case TEK_Scalar: { |
3342 | 30 | llvm::Value *V = CGF.EmitLoadOfScalar( |
3343 | 30 | ElemPtr, /*Volatile=*/false, Private->getType(), Loc, |
3344 | 30 | LValueBaseInfo(AlignmentSource::Type), TBAAAccessInfo()); |
3345 | 30 | CGF.EmitStoreOfScalar(V, GlobLVal); |
3346 | 30 | break; |
3347 | 0 | } |
3348 | 0 | case TEK_Complex: { |
3349 | 0 | CodeGenFunction::ComplexPairTy V = CGF.EmitLoadOfComplex( |
3350 | 0 | CGF.MakeAddrLValue(ElemPtr, Private->getType()), Loc); |
3351 | 0 | CGF.EmitStoreOfComplex(V, GlobLVal, /*isInit=*/false); |
3352 | 0 | break; |
3353 | 0 | } |
3354 | 0 | case TEK_Aggregate: |
3355 | 0 | CGF.EmitAggregateCopy(GlobLVal, |
3356 | 0 | CGF.MakeAddrLValue(ElemPtr, Private->getType()), |
3357 | 0 | Private->getType(), AggValueSlot::DoesNotOverlap); |
3358 | 0 | break; |
3359 | 30 | } |
3360 | 30 | ++Idx; |
3361 | 30 | } |
3362 | | |
3363 | 18 | CGF.FinishFunction(); |
3364 | 18 | return Fn; |
3365 | 18 | } |
3366 | | |
3367 | | /// This function emits a helper that reduces all the reduction variables from |
3368 | | /// the team into the provided global buffer for the reduction variables. |
3369 | | /// |
3370 | | /// void list_to_global_reduce_func(void *buffer, int Idx, void *reduce_data) |
3371 | | /// void *GlobPtrs[]; |
3372 | | /// GlobPtrs[0] = (void*)&buffer.D0[Idx]; |
3373 | | /// ... |
3374 | | /// GlobPtrs[N] = (void*)&buffer.DN[Idx]; |
3375 | | /// reduce_function(GlobPtrs, reduce_data); |
3376 | | static llvm::Value *emitListToGlobalReduceFunction( |
3377 | | CodeGenModule &CGM, ArrayRef<const Expr *> Privates, |
3378 | | QualType ReductionArrayTy, SourceLocation Loc, |
3379 | | const RecordDecl *TeamReductionRec, |
3380 | | const llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
3381 | | &VarFieldMap, |
3382 | 18 | llvm::Function *ReduceFn) { |
3383 | 18 | ASTContext &C = CGM.getContext(); |
3384 | | |
3385 | | // Buffer: global reduction buffer. |
3386 | 18 | ImplicitParamDecl BufferArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3387 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3388 | | // Idx: index of the buffer. |
3389 | 18 | ImplicitParamDecl IdxArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.IntTy, |
3390 | 18 | ImplicitParamDecl::Other); |
3391 | | // ReduceList: thread local Reduce list. |
3392 | 18 | ImplicitParamDecl ReduceListArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3393 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3394 | 18 | FunctionArgList Args; |
3395 | 18 | Args.push_back(&BufferArg); |
3396 | 18 | Args.push_back(&IdxArg); |
3397 | 18 | Args.push_back(&ReduceListArg); |
3398 | | |
3399 | 18 | const CGFunctionInfo &CGFI = |
3400 | 18 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args); |
3401 | 18 | auto *Fn = llvm::Function::Create( |
3402 | 18 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
3403 | 18 | "_omp_reduction_list_to_global_reduce_func", &CGM.getModule()); |
3404 | 18 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
3405 | 18 | Fn->setDoesNotRecurse(); |
3406 | 18 | CodeGenFunction CGF(CGM); |
3407 | 18 | CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc); |
3408 | | |
3409 | 18 | CGBuilderTy &Bld = CGF.Builder; |
3410 | | |
3411 | 18 | Address AddrBufferArg = CGF.GetAddrOfLocalVar(&BufferArg); |
3412 | 18 | QualType StaticTy = C.getRecordType(TeamReductionRec); |
3413 | 18 | llvm::Type *LLVMReductionsBufferTy = |
3414 | 18 | CGM.getTypes().ConvertTypeForMem(StaticTy); |
3415 | 18 | llvm::Value *BufferArrPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3416 | 18 | CGF.EmitLoadOfScalar(AddrBufferArg, /*Volatile=*/false, C.VoidPtrTy, Loc), |
3417 | 18 | LLVMReductionsBufferTy->getPointerTo()); |
3418 | | |
3419 | | // 1. Build a list of reduction variables. |
3420 | | // void *RedList[<n>] = {<ReductionVars>[0], ..., <ReductionVars>[<n>-1]}; |
3421 | 18 | Address ReductionList = |
3422 | 18 | CGF.CreateMemTemp(ReductionArrayTy, ".omp.reduction.red_list"); |
3423 | 18 | auto IPriv = Privates.begin(); |
3424 | 18 | llvm::Value *Idxs[] = {llvm::ConstantInt::getNullValue(CGF.Int32Ty), |
3425 | 18 | CGF.EmitLoadOfScalar(CGF.GetAddrOfLocalVar(&IdxArg), |
3426 | 18 | /*Volatile=*/false, C.IntTy, |
3427 | 18 | Loc)}; |
3428 | 18 | unsigned Idx = 0; |
3429 | 48 | for (unsigned I = 0, E = Privates.size(); I < E; ++I, ++IPriv, ++Idx30 ) { |
3430 | 30 | Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx); |
3431 | | // Global = Buffer.VD[Idx]; |
3432 | 30 | const ValueDecl *VD = cast<DeclRefExpr>(*IPriv)->getDecl(); |
3433 | 30 | const FieldDecl *FD = VarFieldMap.lookup(VD); |
3434 | 30 | LValue GlobLVal = CGF.EmitLValueForField( |
3435 | 30 | CGF.MakeNaturalAlignAddrLValue(BufferArrPtr, StaticTy), FD); |
3436 | 30 | llvm::Value *BufferPtr = |
3437 | 30 | Bld.CreateInBoundsGEP(GlobLVal.getPointer(CGF), Idxs); |
3438 | 30 | llvm::Value *Ptr = CGF.EmitCastToVoidPtr(BufferPtr); |
3439 | 30 | CGF.EmitStoreOfScalar(Ptr, Elem, /*Volatile=*/false, C.VoidPtrTy); |
3440 | 30 | if ((*IPriv)->getType()->isVariablyModifiedType()) { |
3441 | | // Store array size. |
3442 | 0 | ++Idx; |
3443 | 0 | Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx); |
3444 | 0 | llvm::Value *Size = CGF.Builder.CreateIntCast( |
3445 | 0 | CGF.getVLASize( |
3446 | 0 | CGF.getContext().getAsVariableArrayType((*IPriv)->getType())) |
3447 | 0 | .NumElts, |
3448 | 0 | CGF.SizeTy, /*isSigned=*/false); |
3449 | 0 | CGF.Builder.CreateStore(CGF.Builder.CreateIntToPtr(Size, CGF.VoidPtrTy), |
3450 | 0 | Elem); |
3451 | 0 | } |
3452 | 30 | } |
3453 | | |
3454 | | // Call reduce_function(GlobalReduceList, ReduceList) |
3455 | 18 | llvm::Value *GlobalReduceList = |
3456 | 18 | CGF.EmitCastToVoidPtr(ReductionList.getPointer()); |
3457 | 18 | Address AddrReduceListArg = CGF.GetAddrOfLocalVar(&ReduceListArg); |
3458 | 18 | llvm::Value *ReducedPtr = CGF.EmitLoadOfScalar( |
3459 | 18 | AddrReduceListArg, /*Volatile=*/false, C.VoidPtrTy, Loc); |
3460 | 18 | CGM.getOpenMPRuntime().emitOutlinedFunctionCall( |
3461 | 18 | CGF, Loc, ReduceFn, {GlobalReduceList, ReducedPtr}); |
3462 | 18 | CGF.FinishFunction(); |
3463 | 18 | return Fn; |
3464 | 18 | } |
3465 | | |
3466 | | /// This function emits a helper that copies all the reduction variables from |
3467 | | /// the team into the provided global buffer for the reduction variables. |
3468 | | /// |
3469 | | /// void list_to_global_copy_func(void *buffer, int Idx, void *reduce_data) |
3470 | | /// For all data entries D in reduce_data: |
3471 | | /// Copy buffer.D[Idx] to local D; |
3472 | | static llvm::Value *emitGlobalToListCopyFunction( |
3473 | | CodeGenModule &CGM, ArrayRef<const Expr *> Privates, |
3474 | | QualType ReductionArrayTy, SourceLocation Loc, |
3475 | | const RecordDecl *TeamReductionRec, |
3476 | | const llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
3477 | 18 | &VarFieldMap) { |
3478 | 18 | ASTContext &C = CGM.getContext(); |
3479 | | |
3480 | | // Buffer: global reduction buffer. |
3481 | 18 | ImplicitParamDecl BufferArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3482 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3483 | | // Idx: index of the buffer. |
3484 | 18 | ImplicitParamDecl IdxArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.IntTy, |
3485 | 18 | ImplicitParamDecl::Other); |
3486 | | // ReduceList: thread local Reduce list. |
3487 | 18 | ImplicitParamDecl ReduceListArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3488 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3489 | 18 | FunctionArgList Args; |
3490 | 18 | Args.push_back(&BufferArg); |
3491 | 18 | Args.push_back(&IdxArg); |
3492 | 18 | Args.push_back(&ReduceListArg); |
3493 | | |
3494 | 18 | const CGFunctionInfo &CGFI = |
3495 | 18 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args); |
3496 | 18 | auto *Fn = llvm::Function::Create( |
3497 | 18 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
3498 | 18 | "_omp_reduction_global_to_list_copy_func", &CGM.getModule()); |
3499 | 18 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
3500 | 18 | Fn->setDoesNotRecurse(); |
3501 | 18 | CodeGenFunction CGF(CGM); |
3502 | 18 | CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc); |
3503 | | |
3504 | 18 | CGBuilderTy &Bld = CGF.Builder; |
3505 | | |
3506 | 18 | Address AddrReduceListArg = CGF.GetAddrOfLocalVar(&ReduceListArg); |
3507 | 18 | Address AddrBufferArg = CGF.GetAddrOfLocalVar(&BufferArg); |
3508 | 18 | Address LocalReduceList( |
3509 | 18 | Bld.CreatePointerBitCastOrAddrSpaceCast( |
3510 | 18 | CGF.EmitLoadOfScalar(AddrReduceListArg, /*Volatile=*/false, |
3511 | 18 | C.VoidPtrTy, Loc), |
3512 | 18 | CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo()), |
3513 | 18 | CGF.getPointerAlign()); |
3514 | 18 | QualType StaticTy = C.getRecordType(TeamReductionRec); |
3515 | 18 | llvm::Type *LLVMReductionsBufferTy = |
3516 | 18 | CGM.getTypes().ConvertTypeForMem(StaticTy); |
3517 | 18 | llvm::Value *BufferArrPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3518 | 18 | CGF.EmitLoadOfScalar(AddrBufferArg, /*Volatile=*/false, C.VoidPtrTy, Loc), |
3519 | 18 | LLVMReductionsBufferTy->getPointerTo()); |
3520 | | |
3521 | 18 | llvm::Value *Idxs[] = {llvm::ConstantInt::getNullValue(CGF.Int32Ty), |
3522 | 18 | CGF.EmitLoadOfScalar(CGF.GetAddrOfLocalVar(&IdxArg), |
3523 | 18 | /*Volatile=*/false, C.IntTy, |
3524 | 18 | Loc)}; |
3525 | 18 | unsigned Idx = 0; |
3526 | 30 | for (const Expr *Private : Privates) { |
3527 | | // Reduce element = LocalReduceList[i] |
3528 | 30 | Address ElemPtrPtrAddr = Bld.CreateConstArrayGEP(LocalReduceList, Idx); |
3529 | 30 | llvm::Value *ElemPtrPtr = CGF.EmitLoadOfScalar( |
3530 | 30 | ElemPtrPtrAddr, /*Volatile=*/false, C.VoidPtrTy, SourceLocation()); |
3531 | | // elemptr = ((CopyType*)(elemptrptr)) + I |
3532 | 30 | ElemPtrPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3533 | 30 | ElemPtrPtr, CGF.ConvertTypeForMem(Private->getType())->getPointerTo()); |
3534 | 30 | Address ElemPtr = |
3535 | 30 | Address(ElemPtrPtr, C.getTypeAlignInChars(Private->getType())); |
3536 | 30 | const ValueDecl *VD = cast<DeclRefExpr>(Private)->getDecl(); |
3537 | | // Global = Buffer.VD[Idx]; |
3538 | 30 | const FieldDecl *FD = VarFieldMap.lookup(VD); |
3539 | 30 | LValue GlobLVal = CGF.EmitLValueForField( |
3540 | 30 | CGF.MakeNaturalAlignAddrLValue(BufferArrPtr, StaticTy), FD); |
3541 | 30 | llvm::Value *BufferPtr = |
3542 | 30 | Bld.CreateInBoundsGEP(GlobLVal.getPointer(CGF), Idxs); |
3543 | 30 | GlobLVal.setAddress(Address(BufferPtr, GlobLVal.getAlignment())); |
3544 | 30 | switch (CGF.getEvaluationKind(Private->getType())) { |
3545 | 30 | case TEK_Scalar: { |
3546 | 30 | llvm::Value *V = CGF.EmitLoadOfScalar(GlobLVal, Loc); |
3547 | 30 | CGF.EmitStoreOfScalar(V, ElemPtr, /*Volatile=*/false, Private->getType(), |
3548 | 30 | LValueBaseInfo(AlignmentSource::Type), |
3549 | 30 | TBAAAccessInfo()); |
3550 | 30 | break; |
3551 | 0 | } |
3552 | 0 | case TEK_Complex: { |
3553 | 0 | CodeGenFunction::ComplexPairTy V = CGF.EmitLoadOfComplex(GlobLVal, Loc); |
3554 | 0 | CGF.EmitStoreOfComplex(V, CGF.MakeAddrLValue(ElemPtr, Private->getType()), |
3555 | 0 | /*isInit=*/false); |
3556 | 0 | break; |
3557 | 0 | } |
3558 | 0 | case TEK_Aggregate: |
3559 | 0 | CGF.EmitAggregateCopy(CGF.MakeAddrLValue(ElemPtr, Private->getType()), |
3560 | 0 | GlobLVal, Private->getType(), |
3561 | 0 | AggValueSlot::DoesNotOverlap); |
3562 | 0 | break; |
3563 | 30 | } |
3564 | 30 | ++Idx; |
3565 | 30 | } |
3566 | | |
3567 | 18 | CGF.FinishFunction(); |
3568 | 18 | return Fn; |
3569 | 18 | } |
3570 | | |
3571 | | /// This function emits a helper that reduces all the reduction variables from |
3572 | | /// the team into the provided global buffer for the reduction variables. |
3573 | | /// |
3574 | | /// void global_to_list_reduce_func(void *buffer, int Idx, void *reduce_data) |
3575 | | /// void *GlobPtrs[]; |
3576 | | /// GlobPtrs[0] = (void*)&buffer.D0[Idx]; |
3577 | | /// ... |
3578 | | /// GlobPtrs[N] = (void*)&buffer.DN[Idx]; |
3579 | | /// reduce_function(reduce_data, GlobPtrs); |
3580 | | static llvm::Value *emitGlobalToListReduceFunction( |
3581 | | CodeGenModule &CGM, ArrayRef<const Expr *> Privates, |
3582 | | QualType ReductionArrayTy, SourceLocation Loc, |
3583 | | const RecordDecl *TeamReductionRec, |
3584 | | const llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> |
3585 | | &VarFieldMap, |
3586 | 18 | llvm::Function *ReduceFn) { |
3587 | 18 | ASTContext &C = CGM.getContext(); |
3588 | | |
3589 | | // Buffer: global reduction buffer. |
3590 | 18 | ImplicitParamDecl BufferArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3591 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3592 | | // Idx: index of the buffer. |
3593 | 18 | ImplicitParamDecl IdxArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.IntTy, |
3594 | 18 | ImplicitParamDecl::Other); |
3595 | | // ReduceList: thread local Reduce list. |
3596 | 18 | ImplicitParamDecl ReduceListArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, |
3597 | 18 | C.VoidPtrTy, ImplicitParamDecl::Other); |
3598 | 18 | FunctionArgList Args; |
3599 | 18 | Args.push_back(&BufferArg); |
3600 | 18 | Args.push_back(&IdxArg); |
3601 | 18 | Args.push_back(&ReduceListArg); |
3602 | | |
3603 | 18 | const CGFunctionInfo &CGFI = |
3604 | 18 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args); |
3605 | 18 | auto *Fn = llvm::Function::Create( |
3606 | 18 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
3607 | 18 | "_omp_reduction_global_to_list_reduce_func", &CGM.getModule()); |
3608 | 18 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
3609 | 18 | Fn->setDoesNotRecurse(); |
3610 | 18 | CodeGenFunction CGF(CGM); |
3611 | 18 | CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc); |
3612 | | |
3613 | 18 | CGBuilderTy &Bld = CGF.Builder; |
3614 | | |
3615 | 18 | Address AddrBufferArg = CGF.GetAddrOfLocalVar(&BufferArg); |
3616 | 18 | QualType StaticTy = C.getRecordType(TeamReductionRec); |
3617 | 18 | llvm::Type *LLVMReductionsBufferTy = |
3618 | 18 | CGM.getTypes().ConvertTypeForMem(StaticTy); |
3619 | 18 | llvm::Value *BufferArrPtr = Bld.CreatePointerBitCastOrAddrSpaceCast( |
3620 | 18 | CGF.EmitLoadOfScalar(AddrBufferArg, /*Volatile=*/false, C.VoidPtrTy, Loc), |
3621 | 18 | LLVMReductionsBufferTy->getPointerTo()); |
3622 | | |
3623 | | // 1. Build a list of reduction variables. |
3624 | | // void *RedList[<n>] = {<ReductionVars>[0], ..., <ReductionVars>[<n>-1]}; |
3625 | 18 | Address ReductionList = |
3626 | 18 | CGF.CreateMemTemp(ReductionArrayTy, ".omp.reduction.red_list"); |
3627 | 18 | auto IPriv = Privates.begin(); |
3628 | 18 | llvm::Value *Idxs[] = {llvm::ConstantInt::getNullValue(CGF.Int32Ty), |
3629 | 18 | CGF.EmitLoadOfScalar(CGF.GetAddrOfLocalVar(&IdxArg), |
3630 | 18 | /*Volatile=*/false, C.IntTy, |
3631 | 18 | Loc)}; |
3632 | 18 | unsigned Idx = 0; |
3633 | 48 | for (unsigned I = 0, E = Privates.size(); I < E; ++I, ++IPriv, ++Idx30 ) { |
3634 | 30 | Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx); |
3635 | | // Global = Buffer.VD[Idx]; |
3636 | 30 | const ValueDecl *VD = cast<DeclRefExpr>(*IPriv)->getDecl(); |
3637 | 30 | const FieldDecl *FD = VarFieldMap.lookup(VD); |
3638 | 30 | LValue GlobLVal = CGF.EmitLValueForField( |
3639 | 30 | CGF.MakeNaturalAlignAddrLValue(BufferArrPtr, StaticTy), FD); |
3640 | 30 | llvm::Value *BufferPtr = |
3641 | 30 | Bld.CreateInBoundsGEP(GlobLVal.getPointer(CGF), Idxs); |
3642 | 30 | llvm::Value *Ptr = CGF.EmitCastToVoidPtr(BufferPtr); |
3643 | 30 | CGF.EmitStoreOfScalar(Ptr, Elem, /*Volatile=*/false, C.VoidPtrTy); |
3644 | 30 | if ((*IPriv)->getType()->isVariablyModifiedType()) { |
3645 | | // Store array size. |
3646 | 0 | ++Idx; |
3647 | 0 | Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx); |
3648 | 0 | llvm::Value *Size = CGF.Builder.CreateIntCast( |
3649 | 0 | CGF.getVLASize( |
3650 | 0 | CGF.getContext().getAsVariableArrayType((*IPriv)->getType())) |
3651 | 0 | .NumElts, |
3652 | 0 | CGF.SizeTy, /*isSigned=*/false); |
3653 | 0 | CGF.Builder.CreateStore(CGF.Builder.CreateIntToPtr(Size, CGF.VoidPtrTy), |
3654 | 0 | Elem); |
3655 | 0 | } |
3656 | 30 | } |
3657 | | |
3658 | | // Call reduce_function(ReduceList, GlobalReduceList) |
3659 | 18 | llvm::Value *GlobalReduceList = |
3660 | 18 | CGF.EmitCastToVoidPtr(ReductionList.getPointer()); |
3661 | 18 | Address AddrReduceListArg = CGF.GetAddrOfLocalVar(&ReduceListArg); |
3662 | 18 | llvm::Value *ReducedPtr = CGF.EmitLoadOfScalar( |
3663 | 18 | AddrReduceListArg, /*Volatile=*/false, C.VoidPtrTy, Loc); |
3664 | 18 | CGM.getOpenMPRuntime().emitOutlinedFunctionCall( |
3665 | 18 | CGF, Loc, ReduceFn, {ReducedPtr, GlobalReduceList}); |
3666 | 18 | CGF.FinishFunction(); |
3667 | 18 | return Fn; |
3668 | 18 | } |
3669 | | |
3670 | | /// |
3671 | | /// Design of OpenMP reductions on the GPU |
3672 | | /// |
3673 | | /// Consider a typical OpenMP program with one or more reduction |
3674 | | /// clauses: |
3675 | | /// |
3676 | | /// float foo; |
3677 | | /// double bar; |
3678 | | /// #pragma omp target teams distribute parallel for \ |
3679 | | /// reduction(+:foo) reduction(*:bar) |
3680 | | /// for (int i = 0; i < N; i++) { |
3681 | | /// foo += A[i]; bar *= B[i]; |
3682 | | /// } |
3683 | | /// |
3684 | | /// where 'foo' and 'bar' are reduced across all OpenMP threads in |
3685 | | /// all teams. In our OpenMP implementation on the NVPTX device an |
3686 | | /// OpenMP team is mapped to a CUDA threadblock and OpenMP threads |
3687 | | /// within a team are mapped to CUDA threads within a threadblock. |
3688 | | /// Our goal is to efficiently aggregate values across all OpenMP |
3689 | | /// threads such that: |
3690 | | /// |
3691 | | /// - the compiler and runtime are logically concise, and |
3692 | | /// - the reduction is performed efficiently in a hierarchical |
3693 | | /// manner as follows: within OpenMP threads in the same warp, |
3694 | | /// across warps in a threadblock, and finally across teams on |
3695 | | /// the NVPTX device. |
3696 | | /// |
3697 | | /// Introduction to Decoupling |
3698 | | /// |
3699 | | /// We would like to decouple the compiler and the runtime so that the |
3700 | | /// latter is ignorant of the reduction variables (number, data types) |
3701 | | /// and the reduction operators. This allows a simpler interface |
3702 | | /// and implementation while still attaining good performance. |
3703 | | /// |
3704 | | /// Pseudocode for the aforementioned OpenMP program generated by the |
3705 | | /// compiler is as follows: |
3706 | | /// |
3707 | | /// 1. Create private copies of reduction variables on each OpenMP |
3708 | | /// thread: 'foo_private', 'bar_private' |
3709 | | /// 2. Each OpenMP thread reduces the chunk of 'A' and 'B' assigned |
3710 | | /// to it and writes the result in 'foo_private' and 'bar_private' |
3711 | | /// respectively. |
3712 | | /// 3. Call the OpenMP runtime on the GPU to reduce within a team |
3713 | | /// and store the result on the team master: |
3714 | | /// |
3715 | | /// __kmpc_nvptx_parallel_reduce_nowait_v2(..., |
3716 | | /// reduceData, shuffleReduceFn, interWarpCpyFn) |
3717 | | /// |
3718 | | /// where: |
3719 | | /// struct ReduceData { |
3720 | | /// double *foo; |
3721 | | /// double *bar; |
3722 | | /// } reduceData |
3723 | | /// reduceData.foo = &foo_private |
3724 | | /// reduceData.bar = &bar_private |
3725 | | /// |
3726 | | /// 'shuffleReduceFn' and 'interWarpCpyFn' are pointers to two |
3727 | | /// auxiliary functions generated by the compiler that operate on |
3728 | | /// variables of type 'ReduceData'. They aid the runtime perform |
3729 | | /// algorithmic steps in a data agnostic manner. |
3730 | | /// |
3731 | | /// 'shuffleReduceFn' is a pointer to a function that reduces data |
3732 | | /// of type 'ReduceData' across two OpenMP threads (lanes) in the |
3733 | | /// same warp. It takes the following arguments as input: |
3734 | | /// |
3735 | | /// a. variable of type 'ReduceData' on the calling lane, |
3736 | | /// b. its lane_id, |
3737 | | /// c. an offset relative to the current lane_id to generate a |
3738 | | /// remote_lane_id. The remote lane contains the second |
3739 | | /// variable of type 'ReduceData' that is to be reduced. |
3740 | | /// d. an algorithm version parameter determining which reduction |
3741 | | /// algorithm to use. |
3742 | | /// |
3743 | | /// 'shuffleReduceFn' retrieves data from the remote lane using |
3744 | | /// efficient GPU shuffle intrinsics and reduces, using the |
3745 | | /// algorithm specified by the 4th parameter, the two operands |
3746 | | /// element-wise. The result is written to the first operand. |
3747 | | /// |
3748 | | /// Different reduction algorithms are implemented in different |
3749 | | /// runtime functions, all calling 'shuffleReduceFn' to perform |
3750 | | /// the essential reduction step. Therefore, based on the 4th |
3751 | | /// parameter, this function behaves slightly differently to |
3752 | | /// cooperate with the runtime to ensure correctness under |
3753 | | /// different circumstances. |
3754 | | /// |
3755 | | /// 'InterWarpCpyFn' is a pointer to a function that transfers |
3756 | | /// reduced variables across warps. It tunnels, through CUDA |
3757 | | /// shared memory, the thread-private data of type 'ReduceData' |
3758 | | /// from lane 0 of each warp to a lane in the first warp. |
3759 | | /// 4. Call the OpenMP runtime on the GPU to reduce across teams. |
3760 | | /// The last team writes the global reduced value to memory. |
3761 | | /// |
3762 | | /// ret = __kmpc_nvptx_teams_reduce_nowait(..., |
3763 | | /// reduceData, shuffleReduceFn, interWarpCpyFn, |
3764 | | /// scratchpadCopyFn, loadAndReduceFn) |
3765 | | /// |
3766 | | /// 'scratchpadCopyFn' is a helper that stores reduced |
3767 | | /// data from the team master to a scratchpad array in |
3768 | | /// global memory. |
3769 | | /// |
3770 | | /// 'loadAndReduceFn' is a helper that loads data from |
3771 | | /// the scratchpad array and reduces it with the input |
3772 | | /// operand. |
3773 | | /// |
3774 | | /// These compiler generated functions hide address |
3775 | | /// calculation and alignment information from the runtime. |
3776 | | /// 5. if ret == 1: |
3777 | | /// The team master of the last team stores the reduced |
3778 | | /// result to the globals in memory. |
3779 | | /// foo += reduceData.foo; bar *= reduceData.bar |
3780 | | /// |
3781 | | /// |
3782 | | /// Warp Reduction Algorithms |
3783 | | /// |
3784 | | /// On the warp level, we have three algorithms implemented in the |
3785 | | /// OpenMP runtime depending on the number of active lanes: |
3786 | | /// |
3787 | | /// Full Warp Reduction |
3788 | | /// |
3789 | | /// The reduce algorithm within a warp where all lanes are active |
3790 | | /// is implemented in the runtime as follows: |
3791 | | /// |
3792 | | /// full_warp_reduce(void *reduce_data, |
3793 | | /// kmp_ShuffleReductFctPtr ShuffleReduceFn) { |
3794 | | /// for (int offset = WARPSIZE/2; offset > 0; offset /= 2) |
3795 | | /// ShuffleReduceFn(reduce_data, 0, offset, 0); |
3796 | | /// } |
3797 | | /// |
3798 | | /// The algorithm completes in log(2, WARPSIZE) steps. |
3799 | | /// |
3800 | | /// 'ShuffleReduceFn' is used here with lane_id set to 0 because it is |
3801 | | /// not used therefore we save instructions by not retrieving lane_id |
3802 | | /// from the corresponding special registers. The 4th parameter, which |
3803 | | /// represents the version of the algorithm being used, is set to 0 to |
3804 | | /// signify full warp reduction. |
3805 | | /// |
3806 | | /// In this version, 'ShuffleReduceFn' behaves, per element, as follows: |
3807 | | /// |
3808 | | /// #reduce_elem refers to an element in the local lane's data structure |
3809 | | /// #remote_elem is retrieved from a remote lane |
3810 | | /// remote_elem = shuffle_down(reduce_elem, offset, WARPSIZE); |
3811 | | /// reduce_elem = reduce_elem REDUCE_OP remote_elem; |
3812 | | /// |
3813 | | /// Contiguous Partial Warp Reduction |
3814 | | /// |
3815 | | /// This reduce algorithm is used within a warp where only the first |
3816 | | /// 'n' (n <= WARPSIZE) lanes are active. It is typically used when the |
3817 | | /// number of OpenMP threads in a parallel region is not a multiple of |
3818 | | /// WARPSIZE. The algorithm is implemented in the runtime as follows: |
3819 | | /// |
3820 | | /// void |
3821 | | /// contiguous_partial_reduce(void *reduce_data, |
3822 | | /// kmp_ShuffleReductFctPtr ShuffleReduceFn, |
3823 | | /// int size, int lane_id) { |
3824 | | /// int curr_size; |
3825 | | /// int offset; |
3826 | | /// curr_size = size; |
3827 | | /// mask = curr_size/2; |
3828 | | /// while (offset>0) { |
3829 | | /// ShuffleReduceFn(reduce_data, lane_id, offset, 1); |
3830 | | /// curr_size = (curr_size+1)/2; |
3831 | | /// offset = curr_size/2; |
3832 | | /// } |
3833 | | /// } |
3834 | | /// |
3835 | | /// In this version, 'ShuffleReduceFn' behaves, per element, as follows: |
3836 | | /// |
3837 | | /// remote_elem = shuffle_down(reduce_elem, offset, WARPSIZE); |
3838 | | /// if (lane_id < offset) |
3839 | | /// reduce_elem = reduce_elem REDUCE_OP remote_elem |
3840 | | /// else |
3841 | | /// reduce_elem = remote_elem |
3842 | | /// |
3843 | | /// This algorithm assumes that the data to be reduced are located in a |
3844 | | /// contiguous subset of lanes starting from the first. When there is |
3845 | | /// an odd number of active lanes, the data in the last lane is not |
3846 | | /// aggregated with any other lane's dat but is instead copied over. |
3847 | | /// |
3848 | | /// Dispersed Partial Warp Reduction |
3849 | | /// |
3850 | | /// This algorithm is used within a warp when any discontiguous subset of |
3851 | | /// lanes are active. It is used to implement the reduction operation |
3852 | | /// across lanes in an OpenMP simd region or in a nested parallel region. |
3853 | | /// |
3854 | | /// void |
3855 | | /// dispersed_partial_reduce(void *reduce_data, |
3856 | | /// kmp_ShuffleReductFctPtr ShuffleReduceFn) { |
3857 | | /// int size, remote_id; |
3858 | | /// int logical_lane_id = number_of_active_lanes_before_me() * 2; |
3859 | | /// do { |
3860 | | /// remote_id = next_active_lane_id_right_after_me(); |
3861 | | /// # the above function returns 0 of no active lane |
3862 | | /// # is present right after the current lane. |
3863 | | /// size = number_of_active_lanes_in_this_warp(); |
3864 | | /// logical_lane_id /= 2; |
3865 | | /// ShuffleReduceFn(reduce_data, logical_lane_id, |
3866 | | /// remote_id-1-threadIdx.x, 2); |
3867 | | /// } while (logical_lane_id % 2 == 0 && size > 1); |
3868 | | /// } |
3869 | | /// |
3870 | | /// There is no assumption made about the initial state of the reduction. |
3871 | | /// Any number of lanes (>=1) could be active at any position. The reduction |
3872 | | /// result is returned in the first active lane. |
3873 | | /// |
3874 | | /// In this version, 'ShuffleReduceFn' behaves, per element, as follows: |
3875 | | /// |
3876 | | /// remote_elem = shuffle_down(reduce_elem, offset, WARPSIZE); |
3877 | | /// if (lane_id % 2 == 0 && offset > 0) |
3878 | | /// reduce_elem = reduce_elem REDUCE_OP remote_elem |
3879 | | /// else |
3880 | | /// reduce_elem = remote_elem |
3881 | | /// |
3882 | | /// |
3883 | | /// Intra-Team Reduction |
3884 | | /// |
3885 | | /// This function, as implemented in the runtime call |
3886 | | /// '__kmpc_nvptx_parallel_reduce_nowait_v2', aggregates data across OpenMP |
3887 | | /// threads in a team. It first reduces within a warp using the |
3888 | | /// aforementioned algorithms. We then proceed to gather all such |
3889 | | /// reduced values at the first warp. |
3890 | | /// |
3891 | | /// The runtime makes use of the function 'InterWarpCpyFn', which copies |
3892 | | /// data from each of the "warp master" (zeroth lane of each warp, where |
3893 | | /// warp-reduced data is held) to the zeroth warp. This step reduces (in |
3894 | | /// a mathematical sense) the problem of reduction across warp masters in |
3895 | | /// a block to the problem of warp reduction. |
3896 | | /// |
3897 | | /// |
3898 | | /// Inter-Team Reduction |
3899 | | /// |
3900 | | /// Once a team has reduced its data to a single value, it is stored in |
3901 | | /// a global scratchpad array. Since each team has a distinct slot, this |
3902 | | /// can be done without locking. |
3903 | | /// |
3904 | | /// The last team to write to the scratchpad array proceeds to reduce the |
3905 | | /// scratchpad array. One or more workers in the last team use the helper |
3906 | | /// 'loadAndReduceDataFn' to load and reduce values from the array, i.e., |
3907 | | /// the k'th worker reduces every k'th element. |
3908 | | /// |
3909 | | /// Finally, a call is made to '__kmpc_nvptx_parallel_reduce_nowait_v2' to |
3910 | | /// reduce across workers and compute a globally reduced value. |
3911 | | /// |
3912 | | void CGOpenMPRuntimeGPU::emitReduction( |
3913 | | CodeGenFunction &CGF, SourceLocation Loc, ArrayRef<const Expr *> Privates, |
3914 | | ArrayRef<const Expr *> LHSExprs, ArrayRef<const Expr *> RHSExprs, |
3915 | 45 | ArrayRef<const Expr *> ReductionOps, ReductionOptionsTy Options) { |
3916 | 45 | if (!CGF.HaveInsertPoint()) |
3917 | 0 | return; |
3918 | | |
3919 | 45 | bool ParallelReduction = isOpenMPParallelDirective(Options.ReductionKind); |
3920 | 45 | #ifndef NDEBUG |
3921 | 45 | bool TeamsReduction = isOpenMPTeamsDirective(Options.ReductionKind); |
3922 | 45 | #endif |
3923 | | |
3924 | 45 | if (Options.SimpleReduction) { |
3925 | 6 | assert(!TeamsReduction && !ParallelReduction && |
3926 | 6 | "Invalid reduction selection in emitReduction."); |
3927 | 6 | CGOpenMPRuntime::emitReduction(CGF, Loc, Privates, LHSExprs, RHSExprs, |
3928 | 6 | ReductionOps, Options); |
3929 | 6 | return; |
3930 | 6 | } |
3931 | | |
3932 | 39 | assert((TeamsReduction || ParallelReduction) && |
3933 | 39 | "Invalid reduction selection in emitReduction."); |
3934 | | |
3935 | | // Build res = __kmpc_reduce{_nowait}(<gtid>, <n>, sizeof(RedList), |
3936 | | // RedList, shuffle_reduce_func, interwarp_copy_func); |
3937 | | // or |
3938 | | // Build res = __kmpc_reduce_teams_nowait_simple(<loc>, <gtid>, <lck>); |
3939 | 39 | llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc); |
3940 | 39 | llvm::Value *ThreadId = getThreadID(CGF, Loc); |
3941 | | |
3942 | 39 | llvm::Value *Res; |
3943 | 39 | ASTContext &C = CGM.getContext(); |
3944 | | // 1. Build a list of reduction variables. |
3945 | | // void *RedList[<n>] = {<ReductionVars>[0], ..., <ReductionVars>[<n>-1]}; |
3946 | 39 | auto Size = RHSExprs.size(); |
3947 | 63 | for (const Expr *E : Privates) { |
3948 | 63 | if (E->getType()->isVariablyModifiedType()) |
3949 | | // Reserve place for array size. |
3950 | 0 | ++Size; |
3951 | 63 | } |
3952 | 39 | llvm::APInt ArraySize(/*unsigned int numBits=*/32, Size); |
3953 | 39 | QualType ReductionArrayTy = |
3954 | 39 | C.getConstantArrayType(C.VoidPtrTy, ArraySize, nullptr, ArrayType::Normal, |
3955 | 39 | /*IndexTypeQuals=*/0); |
3956 | 39 | Address ReductionList = |
3957 | 39 | CGF.CreateMemTemp(ReductionArrayTy, ".omp.reduction.red_list"); |
3958 | 39 | auto IPriv = Privates.begin(); |
3959 | 39 | unsigned Idx = 0; |
3960 | 102 | for (unsigned I = 0, E = RHSExprs.size(); I < E; ++I, ++IPriv, ++Idx63 ) { |
3961 | 63 | Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx); |
3962 | 63 | CGF.Builder.CreateStore( |
3963 | 63 | CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
3964 | 63 | CGF.EmitLValue(RHSExprs[I]).getPointer(CGF), CGF.VoidPtrTy), |
3965 | 63 | Elem); |
3966 | 63 | if ((*IPriv)->getType()->isVariablyModifiedType()) { |
3967 | | // Store array size. |
3968 | 0 | ++Idx; |
3969 | 0 | Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx); |
3970 | 0 | llvm::Value *Size = CGF.Builder.CreateIntCast( |
3971 | 0 | CGF.getVLASize( |
3972 | 0 | CGF.getContext().getAsVariableArrayType((*IPriv)->getType())) |
3973 | 0 | .NumElts, |
3974 | 0 | CGF.SizeTy, /*isSigned=*/false); |
3975 | 0 | CGF.Builder.CreateStore(CGF.Builder.CreateIntToPtr(Size, CGF.VoidPtrTy), |
3976 | 0 | Elem); |
3977 | 0 | } |
3978 | 63 | } |
3979 | | |
3980 | 39 | llvm::Value *RL = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
3981 | 39 | ReductionList.getPointer(), CGF.VoidPtrTy); |
3982 | 39 | llvm::Function *ReductionFn = emitReductionFunction( |
3983 | 39 | Loc, CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo(), Privates, |
3984 | 39 | LHSExprs, RHSExprs, ReductionOps); |
3985 | 39 | llvm::Value *ReductionArrayTySize = CGF.getTypeSize(ReductionArrayTy); |
3986 | 39 | llvm::Function *ShuffleAndReduceFn = emitShuffleAndReduceFunction( |
3987 | 39 | CGM, Privates, ReductionArrayTy, ReductionFn, Loc); |
3988 | 39 | llvm::Value *InterWarpCopyFn = |
3989 | 39 | emitInterWarpCopyFunction(CGM, Privates, ReductionArrayTy, Loc); |
3990 | | |
3991 | 39 | if (ParallelReduction) { |
3992 | 21 | llvm::Value *Args[] = {RTLoc, |
3993 | 21 | ThreadId, |
3994 | 21 | CGF.Builder.getInt32(RHSExprs.size()), |
3995 | 21 | ReductionArrayTySize, |
3996 | 21 | RL, |
3997 | 21 | ShuffleAndReduceFn, |
3998 | 21 | InterWarpCopyFn}; |
3999 | | |
4000 | 21 | Res = CGF.EmitRuntimeCall( |
4001 | 21 | OMPBuilder.getOrCreateRuntimeFunction( |
4002 | 21 | CGM.getModule(), OMPRTL___kmpc_nvptx_parallel_reduce_nowait_v2), |
4003 | 21 | Args); |
4004 | 18 | } else { |
4005 | 18 | assert(TeamsReduction && "expected teams reduction."); |
4006 | 18 | llvm::SmallDenseMap<const ValueDecl *, const FieldDecl *> VarFieldMap; |
4007 | 18 | llvm::SmallVector<const ValueDecl *, 4> PrivatesReductions(Privates.size()); |
4008 | 18 | int Cnt = 0; |
4009 | 30 | for (const Expr *DRE : Privates) { |
4010 | 30 | PrivatesReductions[Cnt] = cast<DeclRefExpr>(DRE)->getDecl(); |
4011 | 30 | ++Cnt; |
4012 | 30 | } |
4013 | 18 | const RecordDecl *TeamReductionRec = ::buildRecordForGlobalizedVars( |
4014 | 18 | CGM.getContext(), PrivatesReductions, llvm::None, VarFieldMap, |
4015 | 18 | C.getLangOpts().OpenMPCUDAReductionBufNum); |
4016 | 18 | TeamsReductions.push_back(TeamReductionRec); |
4017 | 18 | if (!KernelTeamsReductionPtr) { |
4018 | 6 | KernelTeamsReductionPtr = new llvm::GlobalVariable( |
4019 | 6 | CGM.getModule(), CGM.VoidPtrTy, /*isConstant=*/true, |
4020 | 6 | llvm::GlobalValue::InternalLinkage, nullptr, |
4021 | 6 | "_openmp_teams_reductions_buffer_$_$ptr"); |
4022 | 6 | } |
4023 | 18 | llvm::Value *GlobalBufferPtr = CGF.EmitLoadOfScalar( |
4024 | 18 | Address(KernelTeamsReductionPtr, CGM.getPointerAlign()), |
4025 | 18 | /*Volatile=*/false, C.getPointerType(C.VoidPtrTy), Loc); |
4026 | 18 | llvm::Value *GlobalToBufferCpyFn = ::emitListToGlobalCopyFunction( |
4027 | 18 | CGM, Privates, ReductionArrayTy, Loc, TeamReductionRec, VarFieldMap); |
4028 | 18 | llvm::Value *GlobalToBufferRedFn = ::emitListToGlobalReduceFunction( |
4029 | 18 | CGM, Privates, ReductionArrayTy, Loc, TeamReductionRec, VarFieldMap, |
4030 | 18 | ReductionFn); |
4031 | 18 | llvm::Value *BufferToGlobalCpyFn = ::emitGlobalToListCopyFunction( |
4032 | 18 | CGM, Privates, ReductionArrayTy, Loc, TeamReductionRec, VarFieldMap); |
4033 | 18 | llvm::Value *BufferToGlobalRedFn = ::emitGlobalToListReduceFunction( |
4034 | 18 | CGM, Privates, ReductionArrayTy, Loc, TeamReductionRec, VarFieldMap, |
4035 | 18 | ReductionFn); |
4036 | | |
4037 | 18 | llvm::Value *Args[] = { |
4038 | 18 | RTLoc, |
4039 | 18 | ThreadId, |
4040 | 18 | GlobalBufferPtr, |
4041 | 18 | CGF.Builder.getInt32(C.getLangOpts().OpenMPCUDAReductionBufNum), |
4042 | 18 | RL, |
4043 | 18 | ShuffleAndReduceFn, |
4044 | 18 | InterWarpCopyFn, |
4045 | 18 | GlobalToBufferCpyFn, |
4046 | 18 | GlobalToBufferRedFn, |
4047 | 18 | BufferToGlobalCpyFn, |
4048 | 18 | BufferToGlobalRedFn}; |
4049 | | |
4050 | 18 | Res = CGF.EmitRuntimeCall( |
4051 | 18 | OMPBuilder.getOrCreateRuntimeFunction( |
4052 | 18 | CGM.getModule(), OMPRTL___kmpc_nvptx_teams_reduce_nowait_v2), |
4053 | 18 | Args); |
4054 | 18 | } |
4055 | | |
4056 | | // 5. Build if (res == 1) |
4057 | 39 | llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".omp.reduction.done"); |
4058 | 39 | llvm::BasicBlock *ThenBB = CGF.createBasicBlock(".omp.reduction.then"); |
4059 | 39 | llvm::Value *Cond = CGF.Builder.CreateICmpEQ( |
4060 | 39 | Res, llvm::ConstantInt::get(CGM.Int32Ty, /*V=*/1)); |
4061 | 39 | CGF.Builder.CreateCondBr(Cond, ThenBB, ExitBB); |
4062 | | |
4063 | | // 6. Build then branch: where we have reduced values in the master |
4064 | | // thread in each team. |
4065 | | // __kmpc_end_reduce{_nowait}(<gtid>); |
4066 | | // break; |
4067 | 39 | CGF.EmitBlock(ThenBB); |
4068 | | |
4069 | | // Add emission of __kmpc_end_reduce{_nowait}(<gtid>); |
4070 | 39 | auto &&CodeGen = [Privates, LHSExprs, RHSExprs, ReductionOps, |
4071 | 39 | this](CodeGenFunction &CGF, PrePostActionTy &Action) { |
4072 | 39 | auto IPriv = Privates.begin(); |
4073 | 39 | auto ILHS = LHSExprs.begin(); |
4074 | 39 | auto IRHS = RHSExprs.begin(); |
4075 | 63 | for (const Expr *E : ReductionOps) { |
4076 | 63 | emitSingleReductionCombiner(CGF, E, *IPriv, cast<DeclRefExpr>(*ILHS), |
4077 | 63 | cast<DeclRefExpr>(*IRHS)); |
4078 | 63 | ++IPriv; |
4079 | 63 | ++ILHS; |
4080 | 63 | ++IRHS; |
4081 | 63 | } |
4082 | 39 | }; |
4083 | 39 | llvm::Value *EndArgs[] = {ThreadId}; |
4084 | 39 | RegionCodeGenTy RCG(CodeGen); |
4085 | 39 | NVPTXActionTy Action( |
4086 | 39 | nullptr, llvm::None, |
4087 | 39 | OMPBuilder.getOrCreateRuntimeFunction( |
4088 | 39 | CGM.getModule(), OMPRTL___kmpc_nvptx_end_reduce_nowait), |
4089 | 39 | EndArgs); |
4090 | 39 | RCG.setAction(Action); |
4091 | 39 | RCG(CGF); |
4092 | | // There is no need to emit line number for unconditional branch. |
4093 | 39 | (void)ApplyDebugLocation::CreateEmpty(CGF); |
4094 | 39 | CGF.EmitBlock(ExitBB, /*IsFinished=*/true); |
4095 | 39 | } |
4096 | | |
4097 | | const VarDecl * |
4098 | | CGOpenMPRuntimeGPU::translateParameter(const FieldDecl *FD, |
4099 | 79 | const VarDecl *NativeParam) const { |
4100 | 79 | if (!NativeParam->getType()->isReferenceType()) |
4101 | 25 | return NativeParam; |
4102 | 54 | QualType ArgType = NativeParam->getType(); |
4103 | 54 | QualifierCollector QC; |
4104 | 54 | const Type *NonQualTy = QC.strip(ArgType); |
4105 | 54 | QualType PointeeTy = cast<ReferenceType>(NonQualTy)->getPointeeType(); |
4106 | 54 | if (const auto *Attr = FD->getAttr<OMPCaptureKindAttr>()) { |
4107 | 54 | if (Attr->getCaptureKind() == OMPC_map) { |
4108 | 38 | PointeeTy = CGM.getContext().getAddrSpaceQualType(PointeeTy, |
4109 | 38 | LangAS::opencl_global); |
4110 | 16 | } else if (Attr->getCaptureKind() == OMPC_firstprivate && |
4111 | 16 | PointeeTy.isConstant(CGM.getContext())) { |
4112 | 2 | PointeeTy = CGM.getContext().getAddrSpaceQualType(PointeeTy, |
4113 | 2 | LangAS::opencl_generic); |
4114 | 2 | } |
4115 | 54 | } |
4116 | 54 | ArgType = CGM.getContext().getPointerType(PointeeTy); |
4117 | 54 | QC.addRestrict(); |
4118 | 54 | enum { NVPTX_local_addr = 5 }; |
4119 | 54 | QC.addAddressSpace(getLangASFromTargetAS(NVPTX_local_addr)); |
4120 | 54 | ArgType = QC.apply(CGM.getContext(), ArgType); |
4121 | 54 | if (isa<ImplicitParamDecl>(NativeParam)) |
4122 | 0 | return ImplicitParamDecl::Create( |
4123 | 0 | CGM.getContext(), /*DC=*/nullptr, NativeParam->getLocation(), |
4124 | 0 | NativeParam->getIdentifier(), ArgType, ImplicitParamDecl::Other); |
4125 | 54 | return ParmVarDecl::Create( |
4126 | 54 | CGM.getContext(), |
4127 | 54 | const_cast<DeclContext *>(NativeParam->getDeclContext()), |
4128 | 54 | NativeParam->getBeginLoc(), NativeParam->getLocation(), |
4129 | 54 | NativeParam->getIdentifier(), ArgType, |
4130 | 54 | /*TInfo=*/nullptr, SC_None, /*DefArg=*/nullptr); |
4131 | 54 | } |
4132 | | |
4133 | | Address |
4134 | | CGOpenMPRuntimeGPU::getParameterAddress(CodeGenFunction &CGF, |
4135 | | const VarDecl *NativeParam, |
4136 | 54 | const VarDecl *TargetParam) const { |
4137 | 54 | assert(NativeParam != TargetParam && |
4138 | 54 | NativeParam->getType()->isReferenceType() && |
4139 | 54 | "Native arg must not be the same as target arg."); |
4140 | 54 | Address LocalAddr = CGF.GetAddrOfLocalVar(TargetParam); |
4141 | 54 | QualType NativeParamType = NativeParam->getType(); |
4142 | 54 | QualifierCollector QC; |
4143 | 54 | const Type *NonQualTy = QC.strip(NativeParamType); |
4144 | 54 | QualType NativePointeeTy = cast<ReferenceType>(NonQualTy)->getPointeeType(); |
4145 | 54 | unsigned NativePointeeAddrSpace = |
4146 | 54 | CGF.getContext().getTargetAddressSpace(NativePointeeTy); |
4147 | 54 | QualType TargetTy = TargetParam->getType(); |
4148 | 54 | llvm::Value *TargetAddr = CGF.EmitLoadOfScalar( |
4149 | 54 | LocalAddr, /*Volatile=*/false, TargetTy, SourceLocation()); |
4150 | | // First cast to generic. |
4151 | 54 | TargetAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
4152 | 54 | TargetAddr, TargetAddr->getType()->getPointerElementType()->getPointerTo( |
4153 | 54 | /*AddrSpace=*/0)); |
4154 | | // Cast from generic to native address space. |
4155 | 54 | TargetAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
4156 | 54 | TargetAddr, TargetAddr->getType()->getPointerElementType()->getPointerTo( |
4157 | 54 | NativePointeeAddrSpace)); |
4158 | 54 | Address NativeParamAddr = CGF.CreateMemTemp(NativeParamType); |
4159 | 54 | CGF.EmitStoreOfScalar(TargetAddr, NativeParamAddr, /*Volatile=*/false, |
4160 | 54 | NativeParamType); |
4161 | 54 | return NativeParamAddr; |
4162 | 54 | } |
4163 | | |
4164 | | void CGOpenMPRuntimeGPU::emitOutlinedFunctionCall( |
4165 | | CodeGenFunction &CGF, SourceLocation Loc, llvm::FunctionCallee OutlinedFn, |
4166 | 1.29k | ArrayRef<llvm::Value *> Args) const { |
4167 | 1.29k | SmallVector<llvm::Value *, 4> TargetArgs; |
4168 | 1.29k | TargetArgs.reserve(Args.size()); |
4169 | 1.29k | auto *FnType = OutlinedFn.getFunctionType(); |
4170 | 5.78k | for (unsigned I = 0, E = Args.size(); I < E; ++I4.48k ) { |
4171 | 4.49k | if (FnType->isVarArg() && FnType->getNumParams() <= I2 ) { |
4172 | 1 | TargetArgs.append(std::next(Args.begin(), I), Args.end()); |
4173 | 1 | break; |
4174 | 1 | } |
4175 | 4.48k | llvm::Type *TargetType = FnType->getParamType(I); |
4176 | 4.48k | llvm::Value *NativeArg = Args[I]; |
4177 | 4.48k | if (!TargetType->isPointerTy()) { |
4178 | 1.18k | TargetArgs.emplace_back(NativeArg); |
4179 | 1.18k | continue; |
4180 | 1.18k | } |
4181 | 3.30k | llvm::Value *TargetArg = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
4182 | 3.30k | NativeArg, |
4183 | 3.30k | NativeArg->getType()->getPointerElementType()->getPointerTo()); |
4184 | 3.30k | TargetArgs.emplace_back( |
4185 | 3.30k | CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(TargetArg, TargetType)); |
4186 | 3.30k | } |
4187 | 1.29k | CGOpenMPRuntime::emitOutlinedFunctionCall(CGF, Loc, OutlinedFn, TargetArgs); |
4188 | 1.29k | } |
4189 | | |
4190 | | /// Emit function which wraps the outline parallel region |
4191 | | /// and controls the arguments which are passed to this function. |
4192 | | /// The wrapper ensures that the outlined function is called |
4193 | | /// with the correct arguments when data is shared. |
4194 | | llvm::Function *CGOpenMPRuntimeGPU::createParallelDataSharingWrapper( |
4195 | 74 | llvm::Function *OutlinedParallelFn, const OMPExecutableDirective &D) { |
4196 | 74 | ASTContext &Ctx = CGM.getContext(); |
4197 | 74 | const auto &CS = *D.getCapturedStmt(OMPD_parallel); |
4198 | | |
4199 | | // Create a function that takes as argument the source thread. |
4200 | 74 | FunctionArgList WrapperArgs; |
4201 | 74 | QualType Int16QTy = |
4202 | 74 | Ctx.getIntTypeForBitwidth(/*DestWidth=*/16, /*Signed=*/false); |
4203 | 74 | QualType Int32QTy = |
4204 | 74 | Ctx.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/false); |
4205 | 74 | ImplicitParamDecl ParallelLevelArg(Ctx, /*DC=*/nullptr, D.getBeginLoc(), |
4206 | 74 | /*Id=*/nullptr, Int16QTy, |
4207 | 74 | ImplicitParamDecl::Other); |
4208 | 74 | ImplicitParamDecl WrapperArg(Ctx, /*DC=*/nullptr, D.getBeginLoc(), |
4209 | 74 | /*Id=*/nullptr, Int32QTy, |
4210 | 74 | ImplicitParamDecl::Other); |
4211 | 74 | WrapperArgs.emplace_back(&ParallelLevelArg); |
4212 | 74 | WrapperArgs.emplace_back(&WrapperArg); |
4213 | | |
4214 | 74 | const CGFunctionInfo &CGFI = |
4215 | 74 | CGM.getTypes().arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, WrapperArgs); |
4216 | | |
4217 | 74 | auto *Fn = llvm::Function::Create( |
4218 | 74 | CGM.getTypes().GetFunctionType(CGFI), llvm::GlobalValue::InternalLinkage, |
4219 | 74 | Twine(OutlinedParallelFn->getName(), "_wrapper"), &CGM.getModule()); |
4220 | 74 | CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI); |
4221 | 74 | Fn->setLinkage(llvm::GlobalValue::InternalLinkage); |
4222 | 74 | Fn->setDoesNotRecurse(); |
4223 | | |
4224 | 74 | CodeGenFunction CGF(CGM, /*suppressNewContext=*/true); |
4225 | 74 | CGF.StartFunction(GlobalDecl(), Ctx.VoidTy, Fn, CGFI, WrapperArgs, |
4226 | 74 | D.getBeginLoc(), D.getBeginLoc()); |
4227 | | |
4228 | 74 | const auto *RD = CS.getCapturedRecordDecl(); |
4229 | 74 | auto CurField = RD->field_begin(); |
4230 | | |
4231 | 74 | Address ZeroAddr = CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty, |
4232 | 74 | /*Name=*/".zero.addr"); |
4233 | 74 | CGF.InitTempAlloca(ZeroAddr, CGF.Builder.getInt32(/*C*/ 0)); |
4234 | | // Get the array of arguments. |
4235 | 74 | SmallVector<llvm::Value *, 8> Args; |
4236 | | |
4237 | 74 | Args.emplace_back(CGF.GetAddrOfLocalVar(&WrapperArg).getPointer()); |
4238 | 74 | Args.emplace_back(ZeroAddr.getPointer()); |
4239 | | |
4240 | 74 | CGBuilderTy &Bld = CGF.Builder; |
4241 | 74 | auto CI = CS.capture_begin(); |
4242 | | |
4243 | | // Use global memory for data sharing. |
4244 | | // Handle passing of global args to workers. |
4245 | 74 | Address GlobalArgs = |
4246 | 74 | CGF.CreateDefaultAlignTempAlloca(CGF.VoidPtrPtrTy, "global_args"); |
4247 | 74 | llvm::Value *GlobalArgsPtr = GlobalArgs.getPointer(); |
4248 | 74 | llvm::Value *DataSharingArgs[] = {GlobalArgsPtr}; |
4249 | 74 | CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction( |
4250 | 74 | CGM.getModule(), OMPRTL___kmpc_get_shared_variables), |
4251 | 74 | DataSharingArgs); |
4252 | | |
4253 | | // Retrieve the shared variables from the list of references returned |
4254 | | // by the runtime. Pass the variables to the outlined function. |
4255 | 74 | Address SharedArgListAddress = Address::invalid(); |
4256 | 74 | if (CS.capture_size() > 0 || |
4257 | 47 | isOpenMPLoopBoundSharingDirective(D.getDirectiveKind())) { |
4258 | 27 | SharedArgListAddress = CGF.EmitLoadOfPointer( |
4259 | 27 | GlobalArgs, CGF.getContext() |
4260 | 27 | .getPointerType(CGF.getContext().getPointerType( |
4261 | 27 | CGF.getContext().VoidPtrTy)) |
4262 | 27 | .castAs<PointerType>()); |
4263 | 27 | } |
4264 | 74 | unsigned Idx = 0; |
4265 | 74 | if (isOpenMPLoopBoundSharingDirective(D.getDirectiveKind())) { |
4266 | 0 | Address Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx); |
4267 | 0 | Address TypedAddress = Bld.CreatePointerBitCastOrAddrSpaceCast( |
4268 | 0 | Src, CGF.SizeTy->getPointerTo()); |
4269 | 0 | llvm::Value *LB = CGF.EmitLoadOfScalar( |
4270 | 0 | TypedAddress, |
4271 | 0 | /*Volatile=*/false, |
4272 | 0 | CGF.getContext().getPointerType(CGF.getContext().getSizeType()), |
4273 | 0 | cast<OMPLoopDirective>(D).getLowerBoundVariable()->getExprLoc()); |
4274 | 0 | Args.emplace_back(LB); |
4275 | 0 | ++Idx; |
4276 | 0 | Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, Idx); |
4277 | 0 | TypedAddress = Bld.CreatePointerBitCastOrAddrSpaceCast( |
4278 | 0 | Src, CGF.SizeTy->getPointerTo()); |
4279 | 0 | llvm::Value *UB = CGF.EmitLoadOfScalar( |
4280 | 0 | TypedAddress, |
4281 | 0 | /*Volatile=*/false, |
4282 | 0 | CGF.getContext().getPointerType(CGF.getContext().getSizeType()), |
4283 | 0 | cast<OMPLoopDirective>(D).getUpperBoundVariable()->getExprLoc()); |
4284 | 0 | Args.emplace_back(UB); |
4285 | 0 | ++Idx; |
4286 | 0 | } |
4287 | 74 | if (CS.capture_size() > 0) { |
4288 | 27 | ASTContext &CGFContext = CGF.getContext(); |
4289 | 73 | for (unsigned I = 0, E = CS.capture_size(); I < E; ++I, ++CI, ++CurField46 ) { |
4290 | 46 | QualType ElemTy = CurField->getType(); |
4291 | 46 | Address Src = Bld.CreateConstInBoundsGEP(SharedArgListAddress, I + Idx); |
4292 | 46 | Address TypedAddress = Bld.CreatePointerBitCastOrAddrSpaceCast( |
4293 | 46 | Src, CGF.ConvertTypeForMem(CGFContext.getPointerType(ElemTy))); |
4294 | 46 | llvm::Value *Arg = CGF.EmitLoadOfScalar(TypedAddress, |
4295 | 46 | /*Volatile=*/false, |
4296 | 46 | CGFContext.getPointerType(ElemTy), |
4297 | 46 | CI->getLocation()); |
4298 | 46 | if (CI->capturesVariableByCopy() && |
4299 | 0 | !CI->getCapturedVar()->getType()->isAnyPointerType()) { |
4300 | 0 | Arg = castValueToType(CGF, Arg, ElemTy, CGFContext.getUIntPtrType(), |
4301 | 0 | CI->getLocation()); |
4302 | 0 | } |
4303 | 46 | Args.emplace_back(Arg); |
4304 | 46 | } |
4305 | 27 | } |
4306 | | |
4307 | 74 | emitOutlinedFunctionCall(CGF, D.getBeginLoc(), OutlinedParallelFn, Args); |
4308 | 74 | CGF.FinishFunction(); |
4309 | 74 | return Fn; |
4310 | 74 | } |
4311 | | |
4312 | | void CGOpenMPRuntimeGPU::emitFunctionProlog(CodeGenFunction &CGF, |
4313 | 2.51k | const Decl *D) { |
4314 | 2.51k | if (getDataSharingMode(CGM) != CGOpenMPRuntimeGPU::Generic) |
4315 | 632 | return; |
4316 | | |
4317 | 1.88k | assert(D && "Expected function or captured|block decl."); |
4318 | 1.88k | assert(FunctionGlobalizedDecls.count(CGF.CurFn) == 0 && |
4319 | 1.88k | "Function is registered already."); |
4320 | 1.88k | assert((!TeamAndReductions.first || TeamAndReductions.first == D) && |
4321 | 1.88k | "Team is set but not processed."); |
4322 | 1.88k | const Stmt *Body = nullptr; |
4323 | 1.88k | bool NeedToDelayGlobalization = false; |
4324 | 1.88k | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { |
4325 | 448 | Body = FD->getBody(); |
4326 | 1.43k | } else if (const auto *BD = dyn_cast<BlockDecl>(D)) { |
4327 | 0 | Body = BD->getBody(); |
4328 | 1.43k | } else if (const auto *CD = dyn_cast<CapturedDecl>(D)) { |
4329 | 1.43k | Body = CD->getBody(); |
4330 | 1.43k | NeedToDelayGlobalization = CGF.CapturedStmtInfo->getKind() == CR_OpenMP; |
4331 | 1.43k | if (NeedToDelayGlobalization && |
4332 | 1.43k | getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD) |
4333 | 1.10k | return; |
4334 | 782 | } |
4335 | 782 | if (!Body) |
4336 | 0 | return; |
4337 | 782 | CheckVarsEscapingDeclContext VarChecker(CGF, TeamAndReductions.second); |
4338 | 782 | VarChecker.Visit(Body); |
4339 | 782 | const RecordDecl *GlobalizedVarsRecord = |
4340 | 782 | VarChecker.getGlobalizedRecord(IsInTTDRegion); |
4341 | 782 | TeamAndReductions.first = nullptr; |
4342 | 782 | TeamAndReductions.second.clear(); |
4343 | 782 | ArrayRef<const ValueDecl *> EscapedVariableLengthDecls = |
4344 | 782 | VarChecker.getEscapedVariableLengthDecls(); |
4345 | 782 | if (!GlobalizedVarsRecord && EscapedVariableLengthDecls.empty()695 ) |
4346 | 695 | return; |
4347 | 87 | auto I = FunctionGlobalizedDecls.try_emplace(CGF.CurFn).first; |
4348 | 87 | I->getSecond().MappedParams = |
4349 | 87 | std::make_unique<CodeGenFunction::OMPMapVars>(); |
4350 | 87 | I->getSecond().GlobalRecord = GlobalizedVarsRecord; |
4351 | 87 | I->getSecond().EscapedParameters.insert( |
4352 | 87 | VarChecker.getEscapedParameters().begin(), |
4353 | 87 | VarChecker.getEscapedParameters().end()); |
4354 | 87 | I->getSecond().EscapedVariableLengthDecls.append( |
4355 | 87 | EscapedVariableLengthDecls.begin(), EscapedVariableLengthDecls.end()); |
4356 | 87 | DeclToAddrMapTy &Data = I->getSecond().LocalVarData; |
4357 | 117 | for (const ValueDecl *VD : VarChecker.getEscapedDecls()) { |
4358 | 117 | assert(VD->isCanonicalDecl() && "Expected canonical declaration"); |
4359 | 117 | const FieldDecl *FD = VarChecker.getFieldForGlobalizedVar(VD); |
4360 | 117 | Data.insert(std::make_pair(VD, MappedVarData(FD, IsInTTDRegion))); |
4361 | 117 | } |
4362 | 87 | if (!IsInTTDRegion && !NeedToDelayGlobalization14 && !IsInParallelRegion11 ) { |
4363 | 10 | CheckVarsEscapingDeclContext VarChecker(CGF, llvm::None); |
4364 | 10 | VarChecker.Visit(Body); |
4365 | 10 | I->getSecond().SecondaryGlobalRecord = |
4366 | 10 | VarChecker.getGlobalizedRecord(/*IsInTTDRegion=*/true); |
4367 | 10 | I->getSecond().SecondaryLocalVarData.emplace(); |
4368 | 10 | DeclToAddrMapTy &Data = I->getSecond().SecondaryLocalVarData.getValue(); |
4369 | 10 | for (const ValueDecl *VD : VarChecker.getEscapedDecls()) { |
4370 | 10 | assert(VD->isCanonicalDecl() && "Expected canonical declaration"); |
4371 | 10 | const FieldDecl *FD = VarChecker.getFieldForGlobalizedVar(VD); |
4372 | 10 | Data.insert( |
4373 | 10 | std::make_pair(VD, MappedVarData(FD, /*IsInTTDRegion=*/true))); |
4374 | 10 | } |
4375 | 10 | } |
4376 | 87 | if (!NeedToDelayGlobalization) { |
4377 | 11 | emitGenericVarsProlog(CGF, D->getBeginLoc(), /*WithSPMDCheck=*/true); |
4378 | 11 | struct GlobalizationScope final : EHScopeStack::Cleanup { |
4379 | 11 | GlobalizationScope() = default; |
4380 | | |
4381 | 11 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
4382 | 11 | static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()) |
4383 | 11 | .emitGenericVarsEpilog(CGF, /*WithSPMDCheck=*/true); |
4384 | 11 | } |
4385 | 11 | }; |
4386 | 11 | CGF.EHStack.pushCleanup<GlobalizationScope>(NormalAndEHCleanup); |
4387 | 11 | } |
4388 | 87 | } |
4389 | | |
4390 | | Address CGOpenMPRuntimeGPU::getAddressOfLocalVariable(CodeGenFunction &CGF, |
4391 | 13.6k | const VarDecl *VD) { |
4392 | 13.6k | if (VD && VD->hasAttr<OMPAllocateDeclAttr>()) { |
4393 | 6 | const auto *A = VD->getAttr<OMPAllocateDeclAttr>(); |
4394 | 6 | auto AS = LangAS::Default; |
4395 | 6 | switch (A->getAllocatorType()) { |
4396 | | // Use the default allocator here as by default local vars are |
4397 | | // threadlocal. |
4398 | 0 | case OMPAllocateDeclAttr::OMPNullMemAlloc: |
4399 | 1 | case OMPAllocateDeclAttr::OMPDefaultMemAlloc: |
4400 | 2 | case OMPAllocateDeclAttr::OMPThreadMemAlloc: |
4401 | 2 | case OMPAllocateDeclAttr::OMPHighBWMemAlloc: |
4402 | 2 | case OMPAllocateDeclAttr::OMPLowLatMemAlloc: |
4403 | | // Follow the user decision - use default allocation. |
4404 | 2 | return Address::invalid(); |
4405 | 0 | case OMPAllocateDeclAttr::OMPUserDefinedMemAlloc: |
4406 | | // TODO: implement aupport for user-defined allocators. |
4407 | 0 | return Address::invalid(); |
4408 | 0 | case OMPAllocateDeclAttr::OMPConstMemAlloc: |
4409 | 0 | AS = LangAS::cuda_constant; |
4410 | 0 | break; |
4411 | 1 | case OMPAllocateDeclAttr::OMPPTeamMemAlloc: |
4412 | 1 | AS = LangAS::cuda_shared; |
4413 | 1 | break; |
4414 | 0 | case OMPAllocateDeclAttr::OMPLargeCapMemAlloc: |
4415 | 3 | case OMPAllocateDeclAttr::OMPCGroupMemAlloc: |
4416 | 3 | break; |
4417 | 4 | } |
4418 | 4 | llvm::Type *VarTy = CGF.ConvertTypeForMem(VD->getType()); |
4419 | 4 | auto *GV = new llvm::GlobalVariable( |
4420 | 4 | CGM.getModule(), VarTy, /*isConstant=*/false, |
4421 | 4 | llvm::GlobalValue::InternalLinkage, llvm::Constant::getNullValue(VarTy), |
4422 | 4 | VD->getName(), |
4423 | 4 | /*InsertBefore=*/nullptr, llvm::GlobalValue::NotThreadLocal, |
4424 | 4 | CGM.getContext().getTargetAddressSpace(AS)); |
4425 | 4 | CharUnits Align = CGM.getContext().getDeclAlign(VD); |
4426 | 4 | GV->setAlignment(Align.getAsAlign()); |
4427 | 4 | return Address( |
4428 | 4 | CGF.Builder.CreatePointerBitCastOrAddrSpaceCast( |
4429 | 4 | GV, VarTy->getPointerTo(CGM.getContext().getTargetAddressSpace( |
4430 | 4 | VD->getType().getAddressSpace()))), |
4431 | 4 | Align); |
4432 | 4 | } |
4433 | | |
4434 | 13.6k | if (getDataSharingMode(CGM) != CGOpenMPRuntimeGPU::Generic) |
4435 | 5.24k | return Address::invalid(); |
4436 | | |
4437 | 8.37k | VD = VD->getCanonicalDecl(); |
4438 | 8.37k | auto I = FunctionGlobalizedDecls.find(CGF.CurFn); |
4439 | 8.37k | if (I == FunctionGlobalizedDecls.end()) |
4440 | 7.85k | return Address::invalid(); |
4441 | 521 | auto VDI = I->getSecond().LocalVarData.find(VD); |
4442 | 521 | if (VDI != I->getSecond().LocalVarData.end()) |
4443 | 72 | return VDI->second.PrivateAddr; |
4444 | 449 | if (VD->hasAttrs()) { |
4445 | 74 | for (specific_attr_iterator<OMPReferencedVarAttr> IT(VD->attr_begin()), |
4446 | 74 | E(VD->attr_end()); |
4447 | 122 | IT != E; ++IT48 ) { |
4448 | 74 | auto VDI = I->getSecond().LocalVarData.find( |
4449 | 74 | cast<VarDecl>(cast<DeclRefExpr>(IT->getRef())->getDecl()) |
4450 | 74 | ->getCanonicalDecl()); |
4451 | 74 | if (VDI != I->getSecond().LocalVarData.end()) |
4452 | 26 | return VDI->second.PrivateAddr; |
4453 | 74 | } |
4454 | 74 | } |
4455 | | |
4456 | 423 | return Address::invalid(); |
4457 | 449 | } |
4458 | | |
4459 | 3.04k | void CGOpenMPRuntimeGPU::functionFinished(CodeGenFunction &CGF) { |
4460 | 3.04k | FunctionGlobalizedDecls.erase(CGF.CurFn); |
4461 | 3.04k | CGOpenMPRuntime::functionFinished(CGF); |
4462 | 3.04k | } |
4463 | | |
4464 | | void CGOpenMPRuntimeGPU::getDefaultDistScheduleAndChunk( |
4465 | | CodeGenFunction &CGF, const OMPLoopDirective &S, |
4466 | | OpenMPDistScheduleClauseKind &ScheduleKind, |
4467 | 378 | llvm::Value *&Chunk) const { |
4468 | 378 | auto &RT = static_cast<CGOpenMPRuntimeGPU &>(CGF.CGM.getOpenMPRuntime()); |
4469 | 378 | if (getExecutionMode() == CGOpenMPRuntimeGPU::EM_SPMD) { |
4470 | 366 | ScheduleKind = OMPC_DIST_SCHEDULE_static; |
4471 | 366 | Chunk = CGF.EmitScalarConversion( |
4472 | 366 | RT.getGPUNumThreads(CGF), |
4473 | 366 | CGF.getContext().getIntTypeForBitwidth(32, /*Signed=*/0), |
4474 | 366 | S.getIterationVariable()->getType(), S.getBeginLoc()); |
4475 | 366 | return; |
4476 | 366 | } |
4477 | 12 | CGOpenMPRuntime::getDefaultDistScheduleAndChunk( |
4478 | 12 | CGF, S, ScheduleKind, Chunk); |
4479 | 12 | } |
4480 | | |
4481 | | void CGOpenMPRuntimeGPU::getDefaultScheduleAndChunk( |
4482 | | CodeGenFunction &CGF, const OMPLoopDirective &S, |
4483 | | OpenMPScheduleClauseKind &ScheduleKind, |
4484 | 200 | const Expr *&ChunkExpr) const { |
4485 | 200 | ScheduleKind = OMPC_SCHEDULE_static; |
4486 | | // Chunk size is 1 in this case. |
4487 | 200 | llvm::APInt ChunkSize(32, 1); |
4488 | 200 | ChunkExpr = IntegerLiteral::Create(CGF.getContext(), ChunkSize, |
4489 | 200 | CGF.getContext().getIntTypeForBitwidth(32, /*Signed=*/0), |
4490 | 200 | SourceLocation()); |
4491 | 200 | } |
4492 | | |
4493 | | void CGOpenMPRuntimeGPU::adjustTargetSpecificDataForLambdas( |
4494 | 1.11k | CodeGenFunction &CGF, const OMPExecutableDirective &D) const { |
4495 | 1.11k | assert(isOpenMPTargetExecutionDirective(D.getDirectiveKind()) && |
4496 | 1.11k | " Expected target-based directive."); |
4497 | 1.11k | const CapturedStmt *CS = D.getCapturedStmt(OMPD_target); |
4498 | 1.29k | for (const CapturedStmt::Capture &C : CS->captures()) { |
4499 | | // Capture variables captured by reference in lambdas for target-based |
4500 | | // directives. |
4501 | 1.29k | if (!C.capturesVariable()) |
4502 | 663 | continue; |
4503 | 636 | const VarDecl *VD = C.getCapturedVar(); |
4504 | 636 | const auto *RD = VD->getType() |
4505 | 636 | .getCanonicalType() |
4506 | 636 | .getNonReferenceType() |
4507 | 636 | ->getAsCXXRecordDecl(); |
4508 | 636 | if (!RD || !RD->isLambda()30 ) |
4509 | 621 | continue; |
4510 | 15 | Address VDAddr = CGF.GetAddrOfLocalVar(VD); |
4511 | 15 | LValue VDLVal; |
4512 | 15 | if (VD->getType().getCanonicalType()->isReferenceType()) |
4513 | 15 | VDLVal = CGF.EmitLoadOfReferenceLValue(VDAddr, VD->getType()); |
4514 | 0 | else |
4515 | 0 | VDLVal = CGF.MakeAddrLValue( |
4516 | 0 | VDAddr, VD->getType().getCanonicalType().getNonReferenceType()); |
4517 | 15 | llvm::DenseMap<const VarDecl *, FieldDecl *> Captures; |
4518 | 15 | FieldDecl *ThisCapture = nullptr; |
4519 | 15 | RD->getCaptureFields(Captures, ThisCapture); |
4520 | 15 | if (ThisCapture && CGF.CapturedStmtInfo->isCXXThisExprCaptured()9 ) { |
4521 | 6 | LValue ThisLVal = |
4522 | 6 | CGF.EmitLValueForFieldInitialization(VDLVal, ThisCapture); |
4523 | 6 | llvm::Value *CXXThis = CGF.LoadCXXThis(); |
4524 | 6 | CGF.EmitStoreOfScalar(CXXThis, ThisLVal); |
4525 | 6 | } |
4526 | 39 | for (const LambdaCapture &LC : RD->captures()) { |
4527 | 39 | if (LC.getCaptureKind() != LCK_ByRef) |
4528 | 9 | continue; |
4529 | 30 | const VarDecl *VD = LC.getCapturedVar(); |
4530 | 30 | if (!CS->capturesVariable(VD)) |
4531 | 0 | continue; |
4532 | 30 | auto It = Captures.find(VD); |
4533 | 30 | assert(It != Captures.end() && "Found lambda capture without field."); |
4534 | 30 | LValue VarLVal = CGF.EmitLValueForFieldInitialization(VDLVal, It->second); |
4535 | 30 | Address VDAddr = CGF.GetAddrOfLocalVar(VD); |
4536 | 30 | if (VD->getType().getCanonicalType()->isReferenceType()) |
4537 | 12 | VDAddr = CGF.EmitLoadOfReferenceLValue(VDAddr, |
4538 | 12 | VD->getType().getCanonicalType()) |
4539 | 12 | .getAddress(CGF); |
4540 | 30 | CGF.EmitStoreOfScalar(VDAddr.getPointer(), VarLVal); |
4541 | 30 | } |
4542 | 15 | } |
4543 | 1.11k | } |
4544 | | |
4545 | 2 | unsigned CGOpenMPRuntimeGPU::getDefaultFirstprivateAddressSpace() const { |
4546 | 2 | return CGM.getContext().getTargetAddressSpace(LangAS::cuda_constant); |
4547 | 2 | } |
4548 | | |
4549 | | bool CGOpenMPRuntimeGPU::hasAllocateAttributeForGlobalVar(const VarDecl *VD, |
4550 | 98 | LangAS &AS) { |
4551 | 98 | if (!VD || !VD->hasAttr<OMPAllocateDeclAttr>()) |
4552 | 85 | return false; |
4553 | 13 | const auto *A = VD->getAttr<OMPAllocateDeclAttr>(); |
4554 | 13 | switch(A->getAllocatorType()) { |
4555 | 0 | case OMPAllocateDeclAttr::OMPNullMemAlloc: |
4556 | 1 | case OMPAllocateDeclAttr::OMPDefaultMemAlloc: |
4557 | | // Not supported, fallback to the default mem space. |
4558 | 2 | case OMPAllocateDeclAttr::OMPThreadMemAlloc: |
4559 | 4 | case OMPAllocateDeclAttr::OMPLargeCapMemAlloc: |
4560 | 4 | case OMPAllocateDeclAttr::OMPCGroupMemAlloc: |
4561 | 8 | case OMPAllocateDeclAttr::OMPHighBWMemAlloc: |
4562 | 9 | case OMPAllocateDeclAttr::OMPLowLatMemAlloc: |
4563 | 9 | AS = LangAS::Default; |
4564 | 9 | return true; |
4565 | 2 | case OMPAllocateDeclAttr::OMPConstMemAlloc: |
4566 | 2 | AS = LangAS::cuda_constant; |
4567 | 2 | return true; |
4568 | 2 | case OMPAllocateDeclAttr::OMPPTeamMemAlloc: |
4569 | 2 | AS = LangAS::cuda_shared; |
4570 | 2 | return true; |
4571 | 0 | case OMPAllocateDeclAttr::OMPUserDefinedMemAlloc: |
4572 | 0 | llvm_unreachable("Expected predefined allocator for the variables with the " |
4573 | 0 | "static storage."); |
4574 | 0 | } |
4575 | 0 | return false; |
4576 | 0 | } |
4577 | | |
4578 | | // Get current CudaArch and ignore any unknown values |
4579 | 17 | static CudaArch getCudaArch(CodeGenModule &CGM) { |
4580 | 17 | if (!CGM.getTarget().hasFeature("ptx")) |
4581 | 0 | return CudaArch::UNKNOWN; |
4582 | 33 | for (const auto &Feature : CGM.getTarget().getTargetOpts().FeatureMap)17 { |
4583 | 33 | if (Feature.getValue()) { |
4584 | 33 | CudaArch Arch = StringToCudaArch(Feature.getKey()); |
4585 | 33 | if (Arch != CudaArch::UNKNOWN) |
4586 | 17 | return Arch; |
4587 | 33 | } |
4588 | 33 | } |
4589 | 0 | return CudaArch::UNKNOWN; |
4590 | 17 | } |
4591 | | |
4592 | | /// Check to see if target architecture supports unified addressing which is |
4593 | | /// a restriction for OpenMP requires clause "unified_shared_memory". |
4594 | | void CGOpenMPRuntimeGPU::processRequiresDirective( |
4595 | 17 | const OMPRequiresDecl *D) { |
4596 | 17 | for (const OMPClause *Clause : D->clauselists()) { |
4597 | 17 | if (Clause->getClauseKind() == OMPC_unified_shared_memory) { |
4598 | 17 | CudaArch Arch = getCudaArch(CGM); |
4599 | 17 | switch (Arch) { |
4600 | 1 | case CudaArch::SM_20: |
4601 | 2 | case CudaArch::SM_21: |
4602 | 3 | case CudaArch::SM_30: |
4603 | 4 | case CudaArch::SM_32: |
4604 | 5 | case CudaArch::SM_35: |
4605 | 6 | case CudaArch::SM_37: |
4606 | 7 | case CudaArch::SM_50: |
4607 | 8 | case CudaArch::SM_52: |
4608 | 9 | case CudaArch::SM_53: |
4609 | 10 | case CudaArch::SM_60: |
4610 | 11 | case CudaArch::SM_61: |
4611 | 12 | case CudaArch::SM_62: { |
4612 | 12 | SmallString<256> Buffer; |
4613 | 12 | llvm::raw_svector_ostream Out(Buffer); |
4614 | 12 | Out << "Target architecture " << CudaArchToString(Arch) |
4615 | 12 | << " does not support unified addressing"; |
4616 | 12 | CGM.Error(Clause->getBeginLoc(), Out.str()); |
4617 | 12 | return; |
4618 | 11 | } |
4619 | 3 | case CudaArch::SM_70: |
4620 | 4 | case CudaArch::SM_72: |
4621 | 5 | case CudaArch::SM_75: |
4622 | 5 | case CudaArch::SM_80: |
4623 | 5 | case CudaArch::GFX600: |
4624 | 5 | case CudaArch::GFX601: |
4625 | 5 | case CudaArch::GFX602: |
4626 | 5 | case CudaArch::GFX700: |
4627 | 5 | case CudaArch::GFX701: |
4628 | 5 | case CudaArch::GFX702: |
4629 | 5 | case CudaArch::GFX703: |
4630 | 5 | case CudaArch::GFX704: |
4631 | 5 | case CudaArch::GFX705: |
4632 | 5 | case CudaArch::GFX801: |
4633 | 5 | case CudaArch::GFX802: |
4634 | 5 | case CudaArch::GFX803: |
4635 | 5 | case CudaArch::GFX805: |
4636 | 5 | case CudaArch::GFX810: |
4637 | 5 | case CudaArch::GFX900: |
4638 | 5 | case CudaArch::GFX902: |
4639 | 5 | case CudaArch::GFX904: |
4640 | 5 | case CudaArch::GFX906: |
4641 | 5 | case CudaArch::GFX908: |
4642 | 5 | case CudaArch::GFX909: |
4643 | 5 | case CudaArch::GFX90c: |
4644 | 5 | case CudaArch::GFX1010: |
4645 | 5 | case CudaArch::GFX1011: |
4646 | 5 | case CudaArch::GFX1012: |
4647 | 5 | case CudaArch::GFX1030: |
4648 | 5 | case CudaArch::GFX1031: |
4649 | 5 | case CudaArch::GFX1032: |
4650 | 5 | case CudaArch::GFX1033: |
4651 | 5 | case CudaArch::UNUSED: |
4652 | 5 | case CudaArch::UNKNOWN: |
4653 | 5 | break; |
4654 | 0 | case CudaArch::LAST: |
4655 | 0 | llvm_unreachable("Unexpected Cuda arch."); |
4656 | 17 | } |
4657 | 17 | } |
4658 | 17 | } |
4659 | 5 | CGOpenMPRuntime::processRequiresDirective(D); |
4660 | 5 | } |
4661 | | |
4662 | | /// Get number of SMs and number of blocks per SM. |
4663 | 0 | static std::pair<unsigned, unsigned> getSMsBlocksPerSM(CodeGenModule &CGM) { |
4664 | 0 | std::pair<unsigned, unsigned> Data; |
4665 | 0 | if (CGM.getLangOpts().OpenMPCUDANumSMs) |
4666 | 0 | Data.first = CGM.getLangOpts().OpenMPCUDANumSMs; |
4667 | 0 | if (CGM.getLangOpts().OpenMPCUDABlocksPerSM) |
4668 | 0 | Data.second = CGM.getLangOpts().OpenMPCUDABlocksPerSM; |
4669 | 0 | if (Data.first && Data.second) |
4670 | 0 | return Data; |
4671 | 0 | switch (getCudaArch(CGM)) { |
4672 | 0 | case CudaArch::SM_20: |
4673 | 0 | case CudaArch::SM_21: |
4674 | 0 | case CudaArch::SM_30: |
4675 | 0 | case CudaArch::SM_32: |
4676 | 0 | case CudaArch::SM_35: |
4677 | 0 | case CudaArch::SM_37: |
4678 | 0 | case CudaArch::SM_50: |
4679 | 0 | case CudaArch::SM_52: |
4680 | 0 | case CudaArch::SM_53: |
4681 | 0 | return {16, 16}; |
4682 | 0 | case CudaArch::SM_60: |
4683 | 0 | case CudaArch::SM_61: |
4684 | 0 | case CudaArch::SM_62: |
4685 | 0 | return {56, 32}; |
4686 | 0 | case CudaArch::SM_70: |
4687 | 0 | case CudaArch::SM_72: |
4688 | 0 | case CudaArch::SM_75: |
4689 | 0 | case CudaArch::SM_80: |
4690 | 0 | return {84, 32}; |
4691 | 0 | case CudaArch::GFX600: |
4692 | 0 | case CudaArch::GFX601: |
4693 | 0 | case CudaArch::GFX602: |
4694 | 0 | case CudaArch::GFX700: |
4695 | 0 | case CudaArch::GFX701: |
4696 | 0 | case CudaArch::GFX702: |
4697 | 0 | case CudaArch::GFX703: |
4698 | 0 | case CudaArch::GFX704: |
4699 | 0 | case CudaArch::GFX705: |
4700 | 0 | case CudaArch::GFX801: |
4701 | 0 | case CudaArch::GFX802: |
4702 | 0 | case CudaArch::GFX803: |
4703 | 0 | case CudaArch::GFX805: |
4704 | 0 | case CudaArch::GFX810: |
4705 | 0 | case CudaArch::GFX900: |
4706 | 0 | case CudaArch::GFX902: |
4707 | 0 | case CudaArch::GFX904: |
4708 | 0 | case CudaArch::GFX906: |
4709 | 0 | case CudaArch::GFX908: |
4710 | 0 | case CudaArch::GFX909: |
4711 | 0 | case CudaArch::GFX90c: |
4712 | 0 | case CudaArch::GFX1010: |
4713 | 0 | case CudaArch::GFX1011: |
4714 | 0 | case CudaArch::GFX1012: |
4715 | 0 | case CudaArch::GFX1030: |
4716 | 0 | case CudaArch::GFX1031: |
4717 | 0 | case CudaArch::GFX1032: |
4718 | 0 | case CudaArch::GFX1033: |
4719 | 0 | case CudaArch::UNUSED: |
4720 | 0 | case CudaArch::UNKNOWN: |
4721 | 0 | break; |
4722 | 0 | case CudaArch::LAST: |
4723 | 0 | llvm_unreachable("Unexpected Cuda arch."); |
4724 | 0 | } |
4725 | 0 | llvm_unreachable("Unexpected NVPTX target without ptx feature."); |
4726 | 0 | } |
4727 | | |
4728 | 216 | void CGOpenMPRuntimeGPU::clear() { |
4729 | 216 | if (!GlobalizedRecords.empty() && |
4730 | 193 | !CGM.getLangOpts().OpenMPCUDATargetParallel) { |
4731 | 158 | ASTContext &C = CGM.getContext(); |
4732 | 158 | llvm::SmallVector<const GlobalPtrSizeRecsTy *, 4> GlobalRecs; |
4733 | 158 | llvm::SmallVector<const GlobalPtrSizeRecsTy *, 4> SharedRecs; |
4734 | 158 | RecordDecl *StaticRD = C.buildImplicitRecord( |
4735 | 158 | "_openmp_static_memory_type_$_", RecordDecl::TagKind::TTK_Union); |
4736 | 158 | StaticRD->startDefinition(); |
4737 | 158 | RecordDecl *SharedStaticRD = C.buildImplicitRecord( |
4738 | 158 | "_shared_openmp_static_memory_type_$_", RecordDecl::TagKind::TTK_Union); |
4739 | 158 | SharedStaticRD->startDefinition(); |
4740 | 762 | for (const GlobalPtrSizeRecsTy &Records : GlobalizedRecords) { |
4741 | 762 | if (Records.Records.empty()) |
4742 | 687 | continue; |
4743 | 75 | unsigned Size = 0; |
4744 | 75 | unsigned RecAlignment = 0; |
4745 | 79 | for (const RecordDecl *RD : Records.Records) { |
4746 | 79 | QualType RDTy = C.getRecordType(RD); |
4747 | 79 | unsigned Alignment = C.getTypeAlignInChars(RDTy).getQuantity(); |
4748 | 79 | RecAlignment = std::max(RecAlignment, Alignment); |
4749 | 79 | unsigned RecSize = C.getTypeSizeInChars(RDTy).getQuantity(); |
4750 | 79 | Size = |
4751 | 79 | llvm::alignTo(llvm::alignTo(Size, Alignment) + RecSize, Alignment); |
4752 | 79 | } |
4753 | 75 | Size = llvm::alignTo(Size, RecAlignment); |
4754 | 75 | llvm::APInt ArySize(/*numBits=*/64, Size); |
4755 | 75 | QualType SubTy = C.getConstantArrayType( |
4756 | 75 | C.CharTy, ArySize, nullptr, ArrayType::Normal, /*IndexTypeQuals=*/0); |
4757 | 75 | const bool UseSharedMemory = Size <= SharedMemorySize; |
4758 | 75 | auto *Field = |
4759 | 75 | FieldDecl::Create(C, UseSharedMemory ? SharedStaticRD : StaticRD0 , |
4760 | 75 | SourceLocation(), SourceLocation(), nullptr, SubTy, |
4761 | 75 | C.getTrivialTypeSourceInfo(SubTy, SourceLocation()), |
4762 | 75 | /*BW=*/nullptr, /*Mutable=*/false, |
4763 | 75 | /*InitStyle=*/ICIS_NoInit); |
4764 | 75 | Field->setAccess(AS_public); |
4765 | 75 | if (UseSharedMemory) { |
4766 | 75 | SharedStaticRD->addDecl(Field); |
4767 | 75 | SharedRecs.push_back(&Records); |
4768 | 0 | } else { |
4769 | 0 | StaticRD->addDecl(Field); |
4770 | 0 | GlobalRecs.push_back(&Records); |
4771 | 0 | } |
4772 | 75 | Records.RecSize->setInitializer(llvm::ConstantInt::get(CGM.SizeTy, Size)); |
4773 | 75 | Records.UseSharedMemory->setInitializer( |
4774 | 75 | llvm::ConstantInt::get(CGM.Int16Ty, UseSharedMemory ? 1 : 00 )); |
4775 | 75 | } |
4776 | | // Allocate SharedMemorySize buffer for the shared memory. |
4777 | | // FIXME: nvlink does not handle weak linkage correctly (object with the |
4778 | | // different size are reported as erroneous). |
4779 | | // Restore this code as sson as nvlink is fixed. |
4780 | 158 | if (!SharedStaticRD->field_empty()) { |
4781 | 60 | llvm::APInt ArySize(/*numBits=*/64, SharedMemorySize); |
4782 | 60 | QualType SubTy = C.getConstantArrayType( |
4783 | 60 | C.CharTy, ArySize, nullptr, ArrayType::Normal, /*IndexTypeQuals=*/0); |
4784 | 60 | auto *Field = FieldDecl::Create( |
4785 | 60 | C, SharedStaticRD, SourceLocation(), SourceLocation(), nullptr, SubTy, |
4786 | 60 | C.getTrivialTypeSourceInfo(SubTy, SourceLocation()), |
4787 | 60 | /*BW=*/nullptr, /*Mutable=*/false, |
4788 | 60 | /*InitStyle=*/ICIS_NoInit); |
4789 | 60 | Field->setAccess(AS_public); |
4790 | 60 | SharedStaticRD->addDecl(Field); |
4791 | 60 | } |
4792 | 158 | SharedStaticRD->completeDefinition(); |
4793 | 158 | if (!SharedStaticRD->field_empty()) { |
4794 | 60 | QualType StaticTy = C.getRecordType(SharedStaticRD); |
4795 | 60 | llvm::Type *LLVMStaticTy = CGM.getTypes().ConvertTypeForMem(StaticTy); |
4796 | 60 | auto *GV = new llvm::GlobalVariable( |
4797 | 60 | CGM.getModule(), LLVMStaticTy, |
4798 | 60 | /*isConstant=*/false, llvm::GlobalValue::WeakAnyLinkage, |
4799 | 60 | llvm::UndefValue::get(LLVMStaticTy), |
4800 | 60 | "_openmp_shared_static_glob_rd_$_", /*InsertBefore=*/nullptr, |
4801 | 60 | llvm::GlobalValue::NotThreadLocal, |
4802 | 60 | C.getTargetAddressSpace(LangAS::cuda_shared)); |
4803 | 60 | auto *Replacement = llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( |
4804 | 60 | GV, CGM.VoidPtrTy); |
4805 | 75 | for (const GlobalPtrSizeRecsTy *Rec : SharedRecs) { |
4806 | 75 | Rec->Buffer->replaceAllUsesWith(Replacement); |
4807 | 75 | Rec->Buffer->eraseFromParent(); |
4808 | 75 | } |
4809 | 60 | } |
4810 | 158 | StaticRD->completeDefinition(); |
4811 | 158 | if (!StaticRD->field_empty()) { |
4812 | 0 | QualType StaticTy = C.getRecordType(StaticRD); |
4813 | 0 | std::pair<unsigned, unsigned> SMsBlockPerSM = getSMsBlocksPerSM(CGM); |
4814 | 0 | llvm::APInt Size1(32, SMsBlockPerSM.second); |
4815 | 0 | QualType Arr1Ty = |
4816 | 0 | C.getConstantArrayType(StaticTy, Size1, nullptr, ArrayType::Normal, |
4817 | 0 | /*IndexTypeQuals=*/0); |
4818 | 0 | llvm::APInt Size2(32, SMsBlockPerSM.first); |
4819 | 0 | QualType Arr2Ty = |
4820 | 0 | C.getConstantArrayType(Arr1Ty, Size2, nullptr, ArrayType::Normal, |
4821 | 0 | /*IndexTypeQuals=*/0); |
4822 | 0 | llvm::Type *LLVMArr2Ty = CGM.getTypes().ConvertTypeForMem(Arr2Ty); |
4823 | | // FIXME: nvlink does not handle weak linkage correctly (object with the |
4824 | | // different size are reported as erroneous). |
4825 | | // Restore CommonLinkage as soon as nvlink is fixed. |
4826 | 0 | auto *GV = new llvm::GlobalVariable( |
4827 | 0 | CGM.getModule(), LLVMArr2Ty, |
4828 | 0 | /*isConstant=*/false, llvm::GlobalValue::InternalLinkage, |
4829 | 0 | llvm::Constant::getNullValue(LLVMArr2Ty), |
4830 | 0 | "_openmp_static_glob_rd_$_"); |
4831 | 0 | auto *Replacement = llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( |
4832 | 0 | GV, CGM.VoidPtrTy); |
4833 | 0 | for (const GlobalPtrSizeRecsTy *Rec : GlobalRecs) { |
4834 | 0 | Rec->Buffer->replaceAllUsesWith(Replacement); |
4835 | 0 | Rec->Buffer->eraseFromParent(); |
4836 | 0 | } |
4837 | 0 | } |
4838 | 158 | } |
4839 | 216 | if (!TeamsReductions.empty()) { |
4840 | 6 | ASTContext &C = CGM.getContext(); |
4841 | 6 | RecordDecl *StaticRD = C.buildImplicitRecord( |
4842 | 6 | "_openmp_teams_reduction_type_$_", RecordDecl::TagKind::TTK_Union); |
4843 | 6 | StaticRD->startDefinition(); |
4844 | 18 | for (const RecordDecl *TeamReductionRec : TeamsReductions) { |
4845 | 18 | QualType RecTy = C.getRecordType(TeamReductionRec); |
4846 | 18 | auto *Field = FieldDecl::Create( |
4847 | 18 | C, StaticRD, SourceLocation(), SourceLocation(), nullptr, RecTy, |
4848 | 18 | C.getTrivialTypeSourceInfo(RecTy, SourceLocation()), |
4849 | 18 | /*BW=*/nullptr, /*Mutable=*/false, |
4850 | 18 | /*InitStyle=*/ICIS_NoInit); |
4851 | 18 | Field->setAccess(AS_public); |
4852 | 18 | StaticRD->addDecl(Field); |
4853 | 18 | } |
4854 | 6 | StaticRD->completeDefinition(); |
4855 | 6 | QualType StaticTy = C.getRecordType(StaticRD); |
4856 | 6 | llvm::Type *LLVMReductionsBufferTy = |
4857 | 6 | CGM.getTypes().ConvertTypeForMem(StaticTy); |
4858 | | // FIXME: nvlink does not handle weak linkage correctly (object with the |
4859 | | // different size are reported as erroneous). |
4860 | | // Restore CommonLinkage as soon as nvlink is fixed. |
4861 | 6 | auto *GV = new llvm::GlobalVariable( |
4862 | 6 | CGM.getModule(), LLVMReductionsBufferTy, |
4863 | 6 | /*isConstant=*/false, llvm::GlobalValue::InternalLinkage, |
4864 | 6 | llvm::Constant::getNullValue(LLVMReductionsBufferTy), |
4865 | 6 | "_openmp_teams_reductions_buffer_$_"); |
4866 | 6 | KernelTeamsReductionPtr->setInitializer( |
4867 | 6 | llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(GV, |
4868 | 6 | CGM.VoidPtrTy)); |
4869 | 6 | } |
4870 | 216 | CGOpenMPRuntime::clear(); |
4871 | 216 | } |