Coverage Report

Created: 2022-07-16 07:03

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/CGDeclCXX.cpp
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Count
Source (jump to first uncovered line)
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//===--- CGDeclCXX.cpp - Emit LLVM Code for C++ declarations --------------===//
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 contains code dealing with code generation of C++ declarations
10
//
11
//===----------------------------------------------------------------------===//
12
13
#include "CGCXXABI.h"
14
#include "CGObjCRuntime.h"
15
#include "CGOpenMPRuntime.h"
16
#include "CodeGenFunction.h"
17
#include "TargetInfo.h"
18
#include "clang/AST/Attr.h"
19
#include "clang/Basic/LangOptions.h"
20
#include "llvm/ADT/StringExtras.h"
21
#include "llvm/IR/Intrinsics.h"
22
#include "llvm/IR/MDBuilder.h"
23
#include "llvm/Support/Path.h"
24
25
using namespace clang;
26
using namespace CodeGen;
27
28
static void EmitDeclInit(CodeGenFunction &CGF, const VarDecl &D,
29
14.2k
                         ConstantAddress DeclPtr) {
30
14.2k
  assert(
31
14.2k
      (D.hasGlobalStorage() ||
32
14.2k
       (D.hasLocalStorage() && CGF.getContext().getLangOpts().OpenCLCPlusPlus)) &&
33
14.2k
      "VarDecl must have global or local (in the case of OpenCL) storage!");
34
0
  assert(!D.getType()->isReferenceType() &&
35
14.2k
         "Should not call EmitDeclInit on a reference!");
36
37
0
  QualType type = D.getType();
38
14.2k
  LValue lv = CGF.MakeAddrLValue(DeclPtr, type);
39
40
14.2k
  const Expr *Init = D.getInit();
41
14.2k
  switch (CGF.getEvaluationKind(type)) {
42
9.31k
  case TEK_Scalar: {
43
9.31k
    CodeGenModule &CGM = CGF.CGM;
44
9.31k
    if (lv.isObjCStrong())
45
3
      CGM.getObjCRuntime().EmitObjCGlobalAssign(CGF, CGF.EmitScalarExpr(Init),
46
3
                                                DeclPtr, D.getTLSKind());
47
9.30k
    else if (lv.isObjCWeak())
48
2
      CGM.getObjCRuntime().EmitObjCWeakAssign(CGF, CGF.EmitScalarExpr(Init),
49
2
                                              DeclPtr);
50
9.30k
    else
51
9.30k
      CGF.EmitScalarInit(Init, &D, lv, false);
52
9.31k
    return;
53
0
  }
54
3
  case TEK_Complex:
55
3
    CGF.EmitComplexExprIntoLValue(Init, lv, /*isInit*/ true);
56
3
    return;
57
4.91k
  case TEK_Aggregate:
58
4.91k
    CGF.EmitAggExpr(Init,
59
4.91k
                    AggValueSlot::forLValue(lv, CGF, AggValueSlot::IsDestructed,
60
4.91k
                                            AggValueSlot::DoesNotNeedGCBarriers,
61
4.91k
                                            AggValueSlot::IsNotAliased,
62
4.91k
                                            AggValueSlot::DoesNotOverlap));
63
4.91k
    return;
64
14.2k
  }
65
0
  llvm_unreachable("bad evaluation kind");
66
0
}
67
68
/// Emit code to cause the destruction of the given variable with
69
/// static storage duration.
70
static void EmitDeclDestroy(CodeGenFunction &CGF, const VarDecl &D,
71
14.6k
                            ConstantAddress Addr) {
72
  // Honor __attribute__((no_destroy)) and bail instead of attempting
73
  // to emit a reference to a possibly nonexistent destructor, which
74
  // in turn can cause a crash. This will result in a global constructor
75
  // that isn't balanced out by a destructor call as intended by the
76
  // attribute. This also checks for -fno-c++-static-destructors and
77
  // bails even if the attribute is not present.
78
14.6k
  QualType::DestructionKind DtorKind = D.needsDestruction(CGF.getContext());
79
80
  // FIXME:  __attribute__((cleanup)) ?
81
82
14.6k
  switch (DtorKind) {
83
9.84k
  case QualType::DK_none:
84
9.84k
    return;
85
86
4.74k
  case QualType::DK_cxx_destructor:
87
4.74k
    break;
88
89
7
  case QualType::DK_objc_strong_lifetime:
90
7
  case QualType::DK_objc_weak_lifetime:
91
7
  case QualType::DK_nontrivial_c_struct:
92
    // We don't care about releasing objects during process teardown.
93
7
    assert(!D.getTLSKind() && "should have rejected this");
94
0
    return;
95
14.6k
  }
96
97
4.74k
  llvm::FunctionCallee Func;
98
4.74k
  llvm::Constant *Argument;
99
100
4.74k
  CodeGenModule &CGM = CGF.CGM;
101
4.74k
  QualType Type = D.getType();
102
103
  // Special-case non-array C++ destructors, if they have the right signature.
104
  // Under some ABIs, destructors return this instead of void, and cannot be
105
  // passed directly to __cxa_atexit if the target does not allow this
106
  // mismatch.
107
4.74k
  const CXXRecordDecl *Record = Type->getAsCXXRecordDecl();
108
4.74k
  bool CanRegisterDestructor =
109
4.74k
      Record && 
(4.41k
!CGM.getCXXABI().HasThisReturn(
110
4.41k
                     GlobalDecl(Record->getDestructor(), Dtor_Complete)) ||
111
4.41k
                 
CGM.getCXXABI().canCallMismatchedFunctionType()8
);
112
  // If __cxa_atexit is disabled via a flag, a different helper function is
113
  // generated elsewhere which uses atexit instead, and it takes the destructor
114
  // directly.
115
4.74k
  bool UsingExternalHelper = !CGM.getCodeGenOpts().CXAAtExit;
116
4.74k
  if (Record && 
(4.41k
CanRegisterDestructor4.41k
||
UsingExternalHelper1
)) {
117
4.41k
    assert(!Record->hasTrivialDestructor());
118
0
    CXXDestructorDecl *Dtor = Record->getDestructor();
119
120
4.41k
    Func = CGM.getAddrAndTypeOfCXXStructor(GlobalDecl(Dtor, Dtor_Complete));
121
4.41k
    if (CGF.getContext().getLangOpts().OpenCL) {
122
7
      auto DestAS =
123
7
          CGM.getTargetCodeGenInfo().getAddrSpaceOfCxaAtexitPtrParam();
124
7
      auto DestTy = CGF.getTypes().ConvertType(Type)->getPointerTo(
125
7
          CGM.getContext().getTargetAddressSpace(DestAS));
126
7
      auto SrcAS = D.getType().getQualifiers().getAddressSpace();
127
7
      if (DestAS == SrcAS)
128
0
        Argument = llvm::ConstantExpr::getBitCast(Addr.getPointer(), DestTy);
129
7
      else
130
        // FIXME: On addr space mismatch we are passing NULL. The generation
131
        // of the global destructor function should be adjusted accordingly.
132
7
        Argument = llvm::ConstantPointerNull::get(DestTy);
133
4.40k
    } else {
134
4.40k
      Argument = llvm::ConstantExpr::getBitCast(
135
4.40k
          Addr.getPointer(), CGF.getTypes().ConvertType(Type)->getPointerTo());
136
4.40k
    }
137
  // Otherwise, the standard logic requires a helper function.
138
4.41k
  } else {
139
338
    Addr = Addr.getElementBitCast(CGF.ConvertTypeForMem(Type));
140
338
    Func = CodeGenFunction(CGM)
141
338
           .generateDestroyHelper(Addr, Type, CGF.getDestroyer(DtorKind),
142
338
                                  CGF.needsEHCleanup(DtorKind), &D);
143
338
    Argument = llvm::Constant::getNullValue(CGF.Int8PtrTy);
144
338
  }
145
146
0
  CGM.getCXXABI().registerGlobalDtor(CGF, D, Func, Argument);
147
4.74k
}
148
149
/// Emit code to cause the variable at the given address to be considered as
150
/// constant from this point onwards.
151
static void EmitDeclInvariant(CodeGenFunction &CGF, const VarDecl &D,
152
144
                              llvm::Constant *Addr) {
153
144
  return CGF.EmitInvariantStart(
154
144
      Addr, CGF.getContext().getTypeSizeInChars(D.getType()));
155
144
}
156
157
195
void CodeGenFunction::EmitInvariantStart(llvm::Constant *Addr, CharUnits Size) {
158
  // Do not emit the intrinsic if we're not optimizing.
159
195
  if (!CGM.getCodeGenOpts().OptimizationLevel)
160
185
    return;
161
162
  // Grab the llvm.invariant.start intrinsic.
163
10
  llvm::Intrinsic::ID InvStartID = llvm::Intrinsic::invariant_start;
164
  // Overloaded address space type.
165
10
  llvm::Type *ObjectPtr[1] = {Int8PtrTy};
166
10
  llvm::Function *InvariantStart = CGM.getIntrinsic(InvStartID, ObjectPtr);
167
168
  // Emit a call with the size in bytes of the object.
169
10
  uint64_t Width = Size.getQuantity();
170
10
  llvm::Value *Args[2] = { llvm::ConstantInt::getSigned(Int64Ty, Width),
171
10
                           llvm::ConstantExpr::getBitCast(Addr, Int8PtrTy)};
172
10
  Builder.CreateCall(InvariantStart, Args);
173
10
}
174
175
void CodeGenFunction::EmitCXXGlobalVarDeclInit(const VarDecl &D,
176
                                               llvm::GlobalVariable *GV,
177
14.8k
                                               bool PerformInit) {
178
179
14.8k
  const Expr *Init = D.getInit();
180
14.8k
  QualType T = D.getType();
181
182
  // The address space of a static local variable (DeclPtr) may be different
183
  // from the address space of the "this" argument of the constructor. In that
184
  // case, we need an addrspacecast before calling the constructor.
185
  //
186
  // struct StructWithCtor {
187
  //   __device__ StructWithCtor() {...}
188
  // };
189
  // __device__ void foo() {
190
  //   __shared__ StructWithCtor s;
191
  //   ...
192
  // }
193
  //
194
  // For example, in the above CUDA code, the static local variable s has a
195
  // "shared" address space qualifier, but the constructor of StructWithCtor
196
  // expects "this" in the "generic" address space.
197
14.8k
  unsigned ExpectedAddrSpace = getContext().getTargetAddressSpace(T);
198
14.8k
  unsigned ActualAddrSpace = GV->getAddressSpace();
199
14.8k
  llvm::Constant *DeclPtr = GV;
200
14.8k
  if (ActualAddrSpace != ExpectedAddrSpace) {
201
11
    llvm::PointerType *PTy = llvm::PointerType::getWithSamePointeeType(
202
11
        GV->getType(), ExpectedAddrSpace);
203
11
    DeclPtr = llvm::ConstantExpr::getAddrSpaceCast(DeclPtr, PTy);
204
11
  }
205
206
14.8k
  ConstantAddress DeclAddr(
207
14.8k
      DeclPtr, GV->getValueType(), getContext().getDeclAlign(&D));
208
209
14.8k
  if (!T->isReferenceType()) {
210
14.7k
    if (getLangOpts().OpenMP && 
!getLangOpts().OpenMPSimd3.88k
&&
211
14.7k
        
D.hasAttr<OMPThreadPrivateDeclAttr>()1.67k
) {
212
63
      (void)CGM.getOpenMPRuntime().emitThreadPrivateVarDefinition(
213
63
          &D, DeclAddr, D.getAttr<OMPThreadPrivateDeclAttr>()->getLocation(),
214
63
          PerformInit, this);
215
63
    }
216
14.7k
    if (PerformInit)
217
14.2k
      EmitDeclInit(*this, D, DeclAddr);
218
14.7k
    if (CGM.isTypeConstant(D.getType(), true))
219
144
      EmitDeclInvariant(*this, D, DeclPtr);
220
14.6k
    else
221
14.6k
      EmitDeclDestroy(*this, D, DeclAddr);
222
14.7k
    return;
223
14.7k
  }
224
225
101
  assert(PerformInit && "cannot have constant initializer which needs "
226
101
         "destruction for reference");
227
0
  RValue RV = EmitReferenceBindingToExpr(Init);
228
101
  EmitStoreOfScalar(RV.getScalarVal(), DeclAddr, false, T);
229
101
}
230
231
/// Create a stub function, suitable for being passed to atexit,
232
/// which passes the given address to the given destructor function.
233
llvm::Function *CodeGenFunction::createAtExitStub(const VarDecl &VD,
234
                                                  llvm::FunctionCallee dtor,
235
226
                                                  llvm::Constant *addr) {
236
  // Get the destructor function type, void(*)(void).
237
226
  llvm::FunctionType *ty = llvm::FunctionType::get(CGM.VoidTy, false);
238
226
  SmallString<256> FnName;
239
226
  {
240
226
    llvm::raw_svector_ostream Out(FnName);
241
226
    CGM.getCXXABI().getMangleContext().mangleDynamicAtExitDestructor(&VD, Out);
242
226
  }
243
244
226
  const CGFunctionInfo &FI = CGM.getTypes().arrangeNullaryFunction();
245
226
  llvm::Function *fn = CGM.CreateGlobalInitOrCleanUpFunction(
246
226
      ty, FnName.str(), FI, VD.getLocation());
247
248
226
  CodeGenFunction CGF(CGM);
249
250
226
  CGF.StartFunction(GlobalDecl(&VD, DynamicInitKind::AtExit),
251
226
                    CGM.getContext().VoidTy, fn, FI, FunctionArgList(),
252
226
                    VD.getLocation(), VD.getInit()->getExprLoc());
253
  // Emit an artificial location for this function.
254
226
  auto AL = ApplyDebugLocation::CreateArtificial(CGF);
255
256
226
  llvm::CallInst *call = CGF.Builder.CreateCall(dtor, addr);
257
258
  // Make sure the call and the callee agree on calling convention.
259
226
  if (auto *dtorFn = dyn_cast<llvm::Function>(
260
226
          dtor.getCallee()->stripPointerCastsAndAliases()))
261
226
    call->setCallingConv(dtorFn->getCallingConv());
262
263
226
  CGF.FinishFunction();
264
265
226
  return fn;
266
226
}
267
268
/// Create a stub function, suitable for being passed to __pt_atexit_np,
269
/// which passes the given address to the given destructor function.
270
llvm::Function *CodeGenFunction::createTLSAtExitStub(
271
    const VarDecl &D, llvm::FunctionCallee Dtor, llvm::Constant *Addr,
272
5
    llvm::FunctionCallee &AtExit) {
273
5
  SmallString<256> FnName;
274
5
  {
275
5
    llvm::raw_svector_ostream Out(FnName);
276
5
    CGM.getCXXABI().getMangleContext().mangleDynamicAtExitDestructor(&D, Out);
277
5
  }
278
279
5
  const CGFunctionInfo &FI = CGM.getTypes().arrangeLLVMFunctionInfo(
280
5
      getContext().IntTy, /*instanceMethod=*/false, /*chainCall=*/false,
281
5
      {getContext().IntTy}, FunctionType::ExtInfo(), {}, RequiredArgs::All);
282
283
  // Get the stub function type, int(*)(int,...).
284
5
  llvm::FunctionType *StubTy =
285
5
      llvm::FunctionType::get(CGM.IntTy, {CGM.IntTy}, true);
286
287
5
  llvm::Function *DtorStub = CGM.CreateGlobalInitOrCleanUpFunction(
288
5
      StubTy, FnName.str(), FI, D.getLocation());
289
290
5
  CodeGenFunction CGF(CGM);
291
292
5
  FunctionArgList Args;
293
5
  ImplicitParamDecl IPD(CGM.getContext(), CGM.getContext().IntTy,
294
5
                        ImplicitParamDecl::Other);
295
5
  Args.push_back(&IPD);
296
5
  QualType ResTy = CGM.getContext().IntTy;
297
298
5
  CGF.StartFunction(GlobalDecl(&D, DynamicInitKind::AtExit), ResTy, DtorStub,
299
5
                    FI, Args, D.getLocation(), D.getInit()->getExprLoc());
300
301
  // Emit an artificial location for this function.
302
5
  auto AL = ApplyDebugLocation::CreateArtificial(CGF);
303
304
5
  llvm::CallInst *call = CGF.Builder.CreateCall(Dtor, Addr);
305
306
  // Make sure the call and the callee agree on calling convention.
307
5
  if (auto *DtorFn = dyn_cast<llvm::Function>(
308
5
          Dtor.getCallee()->stripPointerCastsAndAliases()))
309
5
    call->setCallingConv(DtorFn->getCallingConv());
310
311
  // Return 0 from function
312
5
  CGF.Builder.CreateStore(llvm::Constant::getNullValue(CGM.IntTy),
313
5
                          CGF.ReturnValue);
314
315
5
  CGF.FinishFunction();
316
317
5
  return DtorStub;
318
5
}
319
320
/// Register a global destructor using the C atexit runtime function.
321
void CodeGenFunction::registerGlobalDtorWithAtExit(const VarDecl &VD,
322
                                                   llvm::FunctionCallee dtor,
323
178
                                                   llvm::Constant *addr) {
324
  // Create a function which calls the destructor.
325
178
  llvm::Constant *dtorStub = createAtExitStub(VD, dtor, addr);
326
178
  registerGlobalDtorWithAtExit(dtorStub);
327
178
}
328
329
231
void CodeGenFunction::registerGlobalDtorWithAtExit(llvm::Constant *dtorStub) {
330
  // extern "C" int atexit(void (*f)(void));
331
231
  assert(dtorStub->getType() ==
332
231
             llvm::PointerType::get(
333
231
                 llvm::FunctionType::get(CGM.VoidTy, false),
334
231
                 dtorStub->getType()->getPointerAddressSpace()) &&
335
231
         "Argument to atexit has a wrong type.");
336
337
0
  llvm::FunctionType *atexitTy =
338
231
      llvm::FunctionType::get(IntTy, dtorStub->getType(), false);
339
340
231
  llvm::FunctionCallee atexit =
341
231
      CGM.CreateRuntimeFunction(atexitTy, "atexit", llvm::AttributeList(),
342
231
                                /*Local=*/true);
343
231
  if (llvm::Function *atexitFn = dyn_cast<llvm::Function>(atexit.getCallee()))
344
231
    atexitFn->setDoesNotThrow();
345
346
231
  EmitNounwindRuntimeCall(atexit, dtorStub);
347
231
}
348
349
llvm::Value *
350
48
CodeGenFunction::unregisterGlobalDtorWithUnAtExit(llvm::Constant *dtorStub) {
351
  // The unatexit subroutine unregisters __dtor functions that were previously
352
  // registered by the atexit subroutine. If the referenced function is found,
353
  // it is removed from the list of functions that are called at normal program
354
  // termination and the unatexit returns a value of 0, otherwise a non-zero
355
  // value is returned.
356
  //
357
  // extern "C" int unatexit(void (*f)(void));
358
48
  assert(dtorStub->getType() ==
359
48
             llvm::PointerType::get(
360
48
                 llvm::FunctionType::get(CGM.VoidTy, false),
361
48
                 dtorStub->getType()->getPointerAddressSpace()) &&
362
48
         "Argument to unatexit has a wrong type.");
363
364
0
  llvm::FunctionType *unatexitTy =
365
48
      llvm::FunctionType::get(IntTy, {dtorStub->getType()}, /*isVarArg=*/false);
366
367
48
  llvm::FunctionCallee unatexit =
368
48
      CGM.CreateRuntimeFunction(unatexitTy, "unatexit", llvm::AttributeList());
369
370
48
  cast<llvm::Function>(unatexit.getCallee())->setDoesNotThrow();
371
372
48
  return EmitNounwindRuntimeCall(unatexit, dtorStub);
373
48
}
374
375
void CodeGenFunction::EmitCXXGuardedInit(const VarDecl &D,
376
                                         llvm::GlobalVariable *DeclPtr,
377
9.22k
                                         bool PerformInit) {
378
  // If we've been asked to forbid guard variables, emit an error now.
379
  // This diagnostic is hard-coded for Darwin's use case;  we can find
380
  // better phrasing if someone else needs it.
381
9.22k
  if (CGM.getCodeGenOpts().ForbidGuardVariables)
382
1
    CGM.Error(D.getLocation(),
383
1
              "this initialization requires a guard variable, which "
384
1
              "the kernel does not support");
385
386
9.22k
  CGM.getCXXABI().EmitGuardedInit(*this, D, DeclPtr, PerformInit);
387
9.22k
}
388
389
void CodeGenFunction::EmitCXXGuardedInitBranch(llvm::Value *NeedsInit,
390
                                               llvm::BasicBlock *InitBlock,
391
                                               llvm::BasicBlock *NoInitBlock,
392
                                               GuardKind Kind,
393
9.23k
                                               const VarDecl *D) {
394
9.23k
  assert((Kind == GuardKind::TlsGuard || D) && "no guarded variable");
395
396
  // A guess at how many times we will enter the initialization of a
397
  // variable, depending on the kind of variable.
398
0
  static const uint64_t InitsPerTLSVar = 1024;
399
9.23k
  static const uint64_t InitsPerLocalVar = 1024 * 1024;
400
401
9.23k
  llvm::MDNode *Weights;
402
9.23k
  if (Kind == GuardKind::VariableGuard && 
!D->isLocalVarDecl()9.18k
) {
403
    // For non-local variables, don't apply any weighting for now. Due to our
404
    // use of COMDATs, we expect there to be at most one initialization of the
405
    // variable per DSO, but we have no way to know how many DSOs will try to
406
    // initialize the variable.
407
183
    Weights = nullptr;
408
9.05k
  } else {
409
9.05k
    uint64_t NumInits;
410
    // FIXME: For the TLS case, collect and use profiling information to
411
    // determine a more accurate brach weight.
412
9.05k
    if (Kind == GuardKind::TlsGuard || 
D->getTLSKind()8.99k
)
413
122
      NumInits = InitsPerTLSVar;
414
8.92k
    else
415
8.92k
      NumInits = InitsPerLocalVar;
416
417
    // The probability of us entering the initializer is
418
    //   1 / (total number of times we attempt to initialize the variable).
419
9.05k
    llvm::MDBuilder MDHelper(CGM.getLLVMContext());
420
9.05k
    Weights = MDHelper.createBranchWeights(1, NumInits - 1);
421
9.05k
  }
422
423
9.23k
  Builder.CreateCondBr(NeedsInit, InitBlock, NoInitBlock, Weights);
424
9.23k
}
425
426
llvm::Function *CodeGenModule::CreateGlobalInitOrCleanUpFunction(
427
    llvm::FunctionType *FTy, const Twine &Name, const CGFunctionInfo &FI,
428
10.7k
    SourceLocation Loc, bool TLS, llvm::GlobalVariable::LinkageTypes Linkage) {
429
10.7k
  llvm::Function *Fn = llvm::Function::Create(FTy, Linkage, Name, &getModule());
430
431
10.7k
  if (!getLangOpts().AppleKext && 
!TLS10.7k
) {
432
    // Set the section if needed.
433
10.6k
    if (const char *Section = getTarget().getStaticInitSectionSpecifier())
434
2.60k
      Fn->setSection(Section);
435
10.6k
  }
436
437
10.7k
  if (Linkage == llvm::GlobalVariable::InternalLinkage)
438
10.6k
    SetInternalFunctionAttributes(GlobalDecl(), Fn, FI);
439
440
10.7k
  Fn->setCallingConv(getRuntimeCC());
441
442
10.7k
  if (!getLangOpts().Exceptions)
443
9.60k
    Fn->setDoesNotThrow();
444
445
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::Address) &&
446
10.7k
      
!isInNoSanitizeList(SanitizerKind::Address, Fn, Loc)93
)
447
88
    Fn->addFnAttr(llvm::Attribute::SanitizeAddress);
448
449
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::KernelAddress) &&
450
10.7k
      
!isInNoSanitizeList(SanitizerKind::KernelAddress, Fn, Loc)4
)
451
2
    Fn->addFnAttr(llvm::Attribute::SanitizeAddress);
452
453
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::HWAddress) &&
454
10.7k
      
!isInNoSanitizeList(SanitizerKind::HWAddress, Fn, Loc)0
)
455
0
    Fn->addFnAttr(llvm::Attribute::SanitizeHWAddress);
456
457
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::KernelHWAddress) &&
458
10.7k
      
!isInNoSanitizeList(SanitizerKind::KernelHWAddress, Fn, Loc)0
)
459
0
    Fn->addFnAttr(llvm::Attribute::SanitizeHWAddress);
460
461
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::MemtagStack) &&
462
10.7k
      
!isInNoSanitizeList(SanitizerKind::MemtagStack, Fn, Loc)0
)
463
0
    Fn->addFnAttr(llvm::Attribute::SanitizeMemTag);
464
465
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::Thread) &&
466
10.7k
      
!isInNoSanitizeList(SanitizerKind::Thread, Fn, Loc)6
)
467
3
    Fn->addFnAttr(llvm::Attribute::SanitizeThread);
468
469
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::Memory) &&
470
10.7k
      
!isInNoSanitizeList(SanitizerKind::Memory, Fn, Loc)97
)
471
97
    Fn->addFnAttr(llvm::Attribute::SanitizeMemory);
472
473
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::KernelMemory) &&
474
10.7k
      
!isInNoSanitizeList(SanitizerKind::KernelMemory, Fn, Loc)0
)
475
0
    Fn->addFnAttr(llvm::Attribute::SanitizeMemory);
476
477
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::SafeStack) &&
478
10.7k
      
!isInNoSanitizeList(SanitizerKind::SafeStack, Fn, Loc)0
)
479
0
    Fn->addFnAttr(llvm::Attribute::SafeStack);
480
481
10.7k
  if (getLangOpts().Sanitize.has(SanitizerKind::ShadowCallStack) &&
482
10.7k
      
!isInNoSanitizeList(SanitizerKind::ShadowCallStack, Fn, Loc)0
)
483
0
    Fn->addFnAttr(llvm::Attribute::ShadowCallStack);
484
485
10.7k
  return Fn;
486
10.7k
}
487
488
/// Create a global pointer to a function that will initialize a global
489
/// variable.  The user has requested that this pointer be emitted in a specific
490
/// section.
491
void CodeGenModule::EmitPointerToInitFunc(const VarDecl *D,
492
                                          llvm::GlobalVariable *GV,
493
                                          llvm::Function *InitFunc,
494
6
                                          InitSegAttr *ISA) {
495
6
  llvm::GlobalVariable *PtrArray = new llvm::GlobalVariable(
496
6
      TheModule, InitFunc->getType(), /*isConstant=*/true,
497
6
      llvm::GlobalValue::PrivateLinkage, InitFunc, "__cxx_init_fn_ptr");
498
6
  PtrArray->setSection(ISA->getSection());
499
6
  addUsedGlobal(PtrArray);
500
501
  // If the GV is already in a comdat group, then we have to join it.
502
6
  if (llvm::Comdat *C = GV->getComdat())
503
3
    PtrArray->setComdat(C);
504
6
}
505
506
void
507
CodeGenModule::EmitCXXGlobalVarDeclInitFunc(const VarDecl *D,
508
                                            llvm::GlobalVariable *Addr,
509
5.94k
                                            bool PerformInit) {
510
511
  // According to E.2.3.1 in CUDA-7.5 Programming guide: __device__,
512
  // __constant__ and __shared__ variables defined in namespace scope,
513
  // that are of class type, cannot have a non-empty constructor. All
514
  // the checks have been done in Sema by now. Whatever initializers
515
  // are allowed are empty and we just need to ignore them here.
516
5.94k
  if (getLangOpts().CUDAIsDevice && 
!getLangOpts().GPUAllowDeviceInit1
&&
517
5.94k
      
(0
D->hasAttr<CUDADeviceAttr>()0
||
D->hasAttr<CUDAConstantAttr>()0
||
518
0
       D->hasAttr<CUDASharedAttr>()))
519
0
    return;
520
521
5.94k
  if (getLangOpts().OpenMP &&
522
5.94k
      
getOpenMPRuntime().emitDeclareTargetVarDefinition(D, Addr, PerformInit)3.90k
)
523
79
    return;
524
525
  // Check if we've already initialized this decl.
526
5.86k
  auto I = DelayedCXXInitPosition.find(D);
527
5.86k
  if (I != DelayedCXXInitPosition.end() && 
I->second == ~0U1.63k
)
528
22
    return;
529
530
5.84k
  llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy, false);
531
5.84k
  SmallString<256> FnName;
532
5.84k
  {
533
5.84k
    llvm::raw_svector_ostream Out(FnName);
534
5.84k
    getCXXABI().getMangleContext().mangleDynamicInitializer(D, Out);
535
5.84k
  }
536
537
  // Create a variable initialization function.
538
5.84k
  llvm::Function *Fn = CreateGlobalInitOrCleanUpFunction(
539
5.84k
      FTy, FnName.str(), getTypes().arrangeNullaryFunction(), D->getLocation());
540
541
5.84k
  auto *ISA = D->getAttr<InitSegAttr>();
542
5.84k
  CodeGenFunction(*this).GenerateCXXGlobalVarDeclInitFunc(Fn, D, Addr,
543
5.84k
                                                          PerformInit);
544
545
5.84k
  llvm::GlobalVariable *COMDATKey =
546
5.84k
      supportsCOMDAT() && 
D->isExternallyVisible()4.66k
?
Addr3.93k
:
nullptr1.91k
;
547
548
5.84k
  if (D->getTLSKind()) {
549
    // FIXME: Should we support init_priority for thread_local?
550
    // FIXME: We only need to register one __cxa_thread_atexit function for the
551
    // entire TU.
552
191
    CXXThreadLocalInits.push_back(Fn);
553
191
    CXXThreadLocalInitVars.push_back(D);
554
5.65k
  } else if (PerformInit && 
ISA5.23k
) {
555
6
    EmitPointerToInitFunc(D, Addr, Fn, ISA);
556
5.65k
  } else if (auto *IPA = D->getAttr<InitPriorityAttr>()) {
557
929
    OrderGlobalInitsOrStermFinalizers Key(IPA->getPriority(),
558
929
                                          PrioritizedCXXGlobalInits.size());
559
929
    PrioritizedCXXGlobalInits.push_back(std::make_pair(Key, Fn));
560
4.72k
  } else if (isTemplateInstantiation(D->getTemplateSpecializationKind()) ||
561
4.72k
             
getContext().GetGVALinkageForVariable(D) == GVA_DiscardableODR4.61k
||
562
4.72k
             
D->hasAttr<SelectAnyAttr>()4.58k
) {
563
    // C++ [basic.start.init]p2:
564
    //   Definitions of explicitly specialized class template static data
565
    //   members have ordered initialization. Other class template static data
566
    //   members (i.e., implicitly or explicitly instantiated specializations)
567
    //   have unordered initialization.
568
    //
569
    // As a consequence, we can put them into their own llvm.global_ctors entry.
570
    //
571
    // If the global is externally visible, put the initializer into a COMDAT
572
    // group with the global being initialized.  On most platforms, this is a
573
    // minor startup time optimization.  In the MS C++ ABI, there are no guard
574
    // variables, so this COMDAT key is required for correctness.
575
    //
576
    // SelectAny globals will be comdat-folded. Put the initializer into a
577
    // COMDAT group associated with the global, so the initializers get folded
578
    // too.
579
580
141
    AddGlobalCtor(Fn, 65535, COMDATKey);
581
141
    if (COMDATKey && 
(106
getTriple().isOSBinFormatELF()106
||
582
106
                      
getTarget().getCXXABI().isMicrosoft()37
)) {
583
      // When COMDAT is used on ELF or in the MS C++ ABI, the key must be in
584
      // llvm.used to prevent linker GC.
585
106
      addUsedGlobal(COMDATKey);
586
106
    }
587
588
    // If we used a COMDAT key for the global ctor, the init function can be
589
    // discarded if the global ctor entry is discarded.
590
    // FIXME: Do we need to restrict this to ELF and Wasm?
591
141
    llvm::Comdat *C = Addr->getComdat();
592
141
    if (COMDATKey && 
C106
&&
593
141
        
(106
getTarget().getTriple().isOSBinFormatELF()106
||
594
106
         
getTarget().getTriple().isOSBinFormatWasm()37
)) {
595
69
      Fn->setComdat(C);
596
69
    }
597
4.58k
  } else {
598
4.58k
    I = DelayedCXXInitPosition.find(D); // Re-do lookup in case of re-hash.
599
4.58k
    if (I == DelayedCXXInitPosition.end()) {
600
3.34k
      CXXGlobalInits.push_back(Fn);
601
3.34k
    } else 
if (1.23k
I->second != ~0U1.23k
) {
602
1.23k
      assert(I->second < CXXGlobalInits.size() &&
603
1.23k
             CXXGlobalInits[I->second] == nullptr);
604
0
      CXXGlobalInits[I->second] = Fn;
605
1.23k
    }
606
4.58k
  }
607
608
  // Remember that we already emitted the initializer for this global.
609
0
  DelayedCXXInitPosition[D] = ~0U;
610
5.84k
}
611
612
35.9k
void CodeGenModule::EmitCXXThreadLocalInitFunc() {
613
35.9k
  getCXXABI().EmitThreadLocalInitFuncs(
614
35.9k
      *this, CXXThreadLocals, CXXThreadLocalInits, CXXThreadLocalInitVars);
615
616
35.9k
  CXXThreadLocalInits.clear();
617
35.9k
  CXXThreadLocalInitVars.clear();
618
35.9k
  CXXThreadLocals.clear();
619
35.9k
}
620
621
1.39k
static SmallString<128> getTransformedFileName(llvm::Module &M) {
622
1.39k
  SmallString<128> FileName = llvm::sys::path::filename(M.getName());
623
624
1.39k
  if (FileName.empty())
625
0
    FileName = "<null>";
626
627
46.4k
  for (size_t i = 0; i < FileName.size(); 
++i45.0k
) {
628
    // Replace everything that's not [a-zA-Z0-9._] with a _. This set happens
629
    // to be the set of C preprocessing numbers.
630
45.0k
    if (!isPreprocessingNumberBody(FileName[i]))
631
943
      FileName[i] = '_';
632
45.0k
  }
633
634
1.39k
  return FileName;
635
1.39k
}
636
637
626
static std::string getPrioritySuffix(unsigned int Priority) {
638
626
  assert(Priority <= 65535 && "Priority should always be <= 65535.");
639
640
  // Compute the function suffix from priority. Prepend with zeroes to make
641
  // sure the function names are also ordered as priorities.
642
0
  std::string PrioritySuffix = llvm::utostr(Priority);
643
626
  PrioritySuffix = std::string(6 - PrioritySuffix.size(), '0') + PrioritySuffix;
644
645
626
  return PrioritySuffix;
646
626
}
647
648
void
649
35.9k
CodeGenModule::EmitCXXGlobalInitFunc() {
650
68.0k
  while (!CXXGlobalInits.empty() && 
!CXXGlobalInits.back()33.5k
)
651
32.1k
    CXXGlobalInits.pop_back();
652
653
35.9k
  if (CXXGlobalInits.empty() && 
PrioritizedCXXGlobalInits.empty()34.5k
)
654
34.5k
    return;
655
656
1.39k
  llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy, false);
657
1.39k
  const CGFunctionInfo &FI = getTypes().arrangeNullaryFunction();
658
659
  // Create our global prioritized initialization function.
660
1.39k
  if (!PrioritizedCXXGlobalInits.empty()) {
661
309
    SmallVector<llvm::Function *, 8> LocalCXXGlobalInits;
662
309
    llvm::array_pod_sort(PrioritizedCXXGlobalInits.begin(),
663
309
                         PrioritizedCXXGlobalInits.end());
664
    // Iterate over "chunks" of ctors with same priority and emit each chunk
665
    // into separate function. Note - everything is sorted first by priority,
666
    // second - by lex order, so we emit ctor functions in proper order.
667
309
    for (SmallVectorImpl<GlobalInitData >::iterator
668
309
           I = PrioritizedCXXGlobalInits.begin(),
669
929
           E = PrioritizedCXXGlobalInits.end(); I != E; ) {
670
620
      SmallVectorImpl<GlobalInitData >::iterator
671
620
        PrioE = std::upper_bound(I + 1, E, *I, GlobalInitPriorityCmp());
672
673
620
      LocalCXXGlobalInits.clear();
674
675
620
      unsigned int Priority = I->first.priority;
676
620
      llvm::Function *Fn = CreateGlobalInitOrCleanUpFunction(
677
620
          FTy, "_GLOBAL__I_" + getPrioritySuffix(Priority), FI);
678
679
1.54k
      for (; I < PrioE; 
++I929
)
680
929
        LocalCXXGlobalInits.push_back(I->second);
681
682
620
      CodeGenFunction(*this).GenerateCXXGlobalInitFunc(Fn, LocalCXXGlobalInits);
683
620
      AddGlobalCtor(Fn, Priority);
684
620
    }
685
309
    PrioritizedCXXGlobalInits.clear();
686
309
  }
687
688
1.39k
  if (getCXXABI().useSinitAndSterm() && 
CXXGlobalInits.empty()15
)
689
0
    return;
690
691
  // Include the filename in the symbol name. Including "sub_" matches gcc
692
  // and makes sure these symbols appear lexicographically behind the symbols
693
  // with priority emitted above.
694
1.39k
  llvm::Function *Fn = CreateGlobalInitOrCleanUpFunction(
695
1.39k
      FTy, llvm::Twine("_GLOBAL__sub_I_", getTransformedFileName(getModule())),
696
1.39k
      FI);
697
698
1.39k
  CodeGenFunction(*this).GenerateCXXGlobalInitFunc(Fn, CXXGlobalInits);
699
1.39k
  AddGlobalCtor(Fn);
700
701
  // In OpenCL global init functions must be converted to kernels in order to
702
  // be able to launch them from the host.
703
  // FIXME: Some more work might be needed to handle destructors correctly.
704
  // Current initialization function makes use of function pointers callbacks.
705
  // We can't support function pointers especially between host and device.
706
  // However it seems global destruction has little meaning without any
707
  // dynamic resource allocation on the device and program scope variables are
708
  // destroyed by the runtime when program is released.
709
1.39k
  if (getLangOpts().OpenCL) {
710
9
    GenKernelArgMetadata(Fn);
711
9
    Fn->setCallingConv(llvm::CallingConv::SPIR_KERNEL);
712
9
  }
713
714
1.39k
  assert(!getLangOpts().CUDA || !getLangOpts().CUDAIsDevice ||
715
1.39k
         getLangOpts().GPUAllowDeviceInit);
716
1.39k
  if (getLangOpts().HIP && 
getLangOpts().CUDAIsDevice1
) {
717
1
    Fn->setCallingConv(llvm::CallingConv::AMDGPU_KERNEL);
718
1
    Fn->addFnAttr("device-init");
719
1
  }
720
721
1.39k
  CXXGlobalInits.clear();
722
1.39k
}
723
724
35.9k
void CodeGenModule::EmitCXXGlobalCleanUpFunc() {
725
35.9k
  if (CXXGlobalDtorsOrStermFinalizers.empty() &&
726
35.9k
      
PrioritizedCXXStermFinalizers.empty()35.8k
)
727
35.8k
    return;
728
729
17
  llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy, false);
730
17
  const CGFunctionInfo &FI = getTypes().arrangeNullaryFunction();
731
732
  // Create our global prioritized cleanup function.
733
17
  if (!PrioritizedCXXStermFinalizers.empty()) {
734
2
    SmallVector<CXXGlobalDtorsOrStermFinalizer_t, 8> LocalCXXStermFinalizers;
735
2
    llvm::array_pod_sort(PrioritizedCXXStermFinalizers.begin(),
736
2
                         PrioritizedCXXStermFinalizers.end());
737
    // Iterate over "chunks" of dtors with same priority and emit each chunk
738
    // into separate function. Note - everything is sorted first by priority,
739
    // second - by lex order, so we emit dtor functions in proper order.
740
2
    for (SmallVectorImpl<StermFinalizerData>::iterator
741
2
             I = PrioritizedCXXStermFinalizers.begin(),
742
2
             E = PrioritizedCXXStermFinalizers.end();
743
8
         I != E;) {
744
6
      SmallVectorImpl<StermFinalizerData>::iterator PrioE =
745
6
          std::upper_bound(I + 1, E, *I, StermFinalizerPriorityCmp());
746
747
6
      LocalCXXStermFinalizers.clear();
748
749
6
      unsigned int Priority = I->first.priority;
750
6
      llvm::Function *Fn = CreateGlobalInitOrCleanUpFunction(
751
6
          FTy, "_GLOBAL__a_" + getPrioritySuffix(Priority), FI);
752
753
14
      for (; I < PrioE; 
++I8
) {
754
8
        llvm::FunctionCallee DtorFn = I->second;
755
8
        LocalCXXStermFinalizers.emplace_back(DtorFn.getFunctionType(),
756
8
                                             DtorFn.getCallee(), nullptr);
757
8
      }
758
759
6
      CodeGenFunction(*this).GenerateCXXGlobalCleanUpFunc(
760
6
          Fn, LocalCXXStermFinalizers);
761
6
      AddGlobalDtor(Fn, Priority);
762
6
    }
763
2
    PrioritizedCXXStermFinalizers.clear();
764
2
  }
765
766
17
  if (CXXGlobalDtorsOrStermFinalizers.empty())
767
0
    return;
768
769
  // Create our global cleanup function.
770
17
  llvm::Function *Fn =
771
17
      CreateGlobalInitOrCleanUpFunction(FTy, "_GLOBAL__D_a", FI);
772
773
17
  CodeGenFunction(*this).GenerateCXXGlobalCleanUpFunc(
774
17
      Fn, CXXGlobalDtorsOrStermFinalizers);
775
17
  AddGlobalDtor(Fn);
776
17
  CXXGlobalDtorsOrStermFinalizers.clear();
777
17
}
778
779
/// Emit the code necessary to initialize the given global variable.
780
void CodeGenFunction::GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn,
781
                                                       const VarDecl *D,
782
                                                 llvm::GlobalVariable *Addr,
783
5.84k
                                                       bool PerformInit) {
784
  // Check if we need to emit debug info for variable initializer.
785
5.84k
  if (D->hasAttr<NoDebugAttr>())
786
1
    DebugInfo = nullptr; // disable debug info indefinitely for this function
787
788
5.84k
  CurEHLocation = D->getBeginLoc();
789
790
5.84k
  StartFunction(GlobalDecl(D, DynamicInitKind::Initializer),
791
5.84k
                getContext().VoidTy, Fn, getTypes().arrangeNullaryFunction(),
792
5.84k
                FunctionArgList());
793
  // Emit an artificial location for this function.
794
5.84k
  auto AL = ApplyDebugLocation::CreateArtificial(*this);
795
796
  // Use guarded initialization if the global variable is weak. This
797
  // occurs for, e.g., instantiated static data members and
798
  // definitions explicitly marked weak.
799
  //
800
  // Also use guarded initialization for a variable with dynamic TLS and
801
  // unordered initialization. (If the initialization is ordered, the ABI
802
  // layer will guard the whole-TU initialization for us.)
803
5.84k
  if (Addr->hasWeakLinkage() || 
Addr->hasLinkOnceLinkage()5.77k
||
804
5.84k
      
(5.61k
D->getTLSKind() == VarDecl::TLS_Dynamic5.61k
&&
805
5.61k
       
isTemplateInstantiation(D->getTemplateSpecializationKind())105
)) {
806
230
    EmitCXXGuardedInit(*D, Addr, PerformInit);
807
5.61k
  } else {
808
5.61k
    EmitCXXGlobalVarDeclInit(*D, Addr, PerformInit);
809
5.61k
  }
810
811
5.84k
  FinishFunction();
812
5.84k
}
813
814
void
815
CodeGenFunction::GenerateCXXGlobalInitFunc(llvm::Function *Fn,
816
                                           ArrayRef<llvm::Function *> Decls,
817
2.07k
                                           ConstantAddress Guard) {
818
2.07k
  {
819
2.07k
    auto NL = ApplyDebugLocation::CreateEmpty(*this);
820
2.07k
    StartFunction(GlobalDecl(), getContext().VoidTy, Fn,
821
2.07k
                  getTypes().arrangeNullaryFunction(), FunctionArgList());
822
    // Emit an artificial location for this function.
823
2.07k
    auto AL = ApplyDebugLocation::CreateArtificial(*this);
824
825
2.07k
    llvm::BasicBlock *ExitBlock = nullptr;
826
2.07k
    if (Guard.isValid()) {
827
      // If we have a guard variable, check whether we've already performed
828
      // these initializations. This happens for TLS initialization functions.
829
51
      llvm::Value *GuardVal = Builder.CreateLoad(Guard);
830
51
      llvm::Value *Uninit = Builder.CreateIsNull(GuardVal,
831
51
                                                 "guard.uninitialized");
832
51
      llvm::BasicBlock *InitBlock = createBasicBlock("init");
833
51
      ExitBlock = createBasicBlock("exit");
834
51
      EmitCXXGuardedInitBranch(Uninit, InitBlock, ExitBlock,
835
51
                               GuardKind::TlsGuard, nullptr);
836
51
      EmitBlock(InitBlock);
837
      // Mark as initialized before initializing anything else. If the
838
      // initializers use previously-initialized thread_local vars, that's
839
      // probably supposed to be OK, but the standard doesn't say.
840
51
      Builder.CreateStore(llvm::ConstantInt::get(GuardVal->getType(),1), Guard);
841
842
      // The guard variable can't ever change again.
843
51
      EmitInvariantStart(
844
51
          Guard.getPointer(),
845
51
          CharUnits::fromQuantity(
846
51
              CGM.getDataLayout().getTypeAllocSize(GuardVal->getType())));
847
51
    }
848
849
2.07k
    RunCleanupsScope Scope(*this);
850
851
    // When building in Objective-C++ ARC mode, create an autorelease pool
852
    // around the global initializers.
853
2.07k
    if (getLangOpts().ObjCAutoRefCount && 
getLangOpts().CPlusPlus4
) {
854
4
      llvm::Value *token = EmitObjCAutoreleasePoolPush();
855
4
      EmitObjCAutoreleasePoolCleanup(token);
856
4
    }
857
858
10.4k
    for (unsigned i = 0, e = Decls.size(); i != e; 
++i8.38k
)
859
8.38k
      if (Decls[i])
860
5.61k
        EmitRuntimeCall(Decls[i]);
861
862
2.07k
    Scope.ForceCleanup();
863
864
2.07k
    if (ExitBlock) {
865
51
      Builder.CreateBr(ExitBlock);
866
51
      EmitBlock(ExitBlock);
867
51
    }
868
2.07k
  }
869
870
2.07k
  FinishFunction();
871
2.07k
}
872
873
void CodeGenFunction::GenerateCXXGlobalCleanUpFunc(
874
    llvm::Function *Fn,
875
    ArrayRef<std::tuple<llvm::FunctionType *, llvm::WeakTrackingVH,
876
                        llvm::Constant *>>
877
23
        DtorsOrStermFinalizers) {
878
23
  {
879
23
    auto NL = ApplyDebugLocation::CreateEmpty(*this);
880
23
    StartFunction(GlobalDecl(), getContext().VoidTy, Fn,
881
23
                  getTypes().arrangeNullaryFunction(), FunctionArgList());
882
    // Emit an artificial location for this function.
883
23
    auto AL = ApplyDebugLocation::CreateArtificial(*this);
884
885
    // Emit the cleanups, in reverse order from construction.
886
59
    for (unsigned i = 0, e = DtorsOrStermFinalizers.size(); i != e; 
++i36
) {
887
36
      llvm::FunctionType *CalleeTy;
888
36
      llvm::Value *Callee;
889
36
      llvm::Constant *Arg;
890
36
      std::tie(CalleeTy, Callee, Arg) = DtorsOrStermFinalizers[e - i - 1];
891
892
36
      llvm::CallInst *CI = nullptr;
893
36
      if (Arg == nullptr) {
894
30
        assert(
895
30
            CGM.getCXXABI().useSinitAndSterm() &&
896
30
            "Arg could not be nullptr unless using sinit and sterm functions.");
897
0
        CI = Builder.CreateCall(CalleeTy, Callee);
898
30
      } else
899
6
        CI = Builder.CreateCall(CalleeTy, Callee, Arg);
900
901
      // Make sure the call and the callee agree on calling convention.
902
36
      if (llvm::Function *F = dyn_cast<llvm::Function>(Callee))
903
36
        CI->setCallingConv(F->getCallingConv());
904
36
    }
905
23
  }
906
907
23
  FinishFunction();
908
23
}
909
910
/// generateDestroyHelper - Generates a helper function which, when
911
/// invoked, destroys the given object.  The address of the object
912
/// should be in global memory.
913
llvm::Function *CodeGenFunction::generateDestroyHelper(
914
    Address addr, QualType type, Destroyer *destroyer,
915
342
    bool useEHCleanupForArray, const VarDecl *VD) {
916
342
  FunctionArgList args;
917
342
  ImplicitParamDecl Dst(getContext(), getContext().VoidPtrTy,
918
342
                        ImplicitParamDecl::Other);
919
342
  args.push_back(&Dst);
920
921
342
  const CGFunctionInfo &FI =
922
342
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(getContext().VoidTy, args);
923
342
  llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI);
924
342
  llvm::Function *fn = CGM.CreateGlobalInitOrCleanUpFunction(
925
342
      FTy, "__cxx_global_array_dtor", FI, VD->getLocation());
926
927
342
  CurEHLocation = VD->getBeginLoc();
928
929
342
  StartFunction(GlobalDecl(VD, DynamicInitKind::GlobalArrayDestructor),
930
342
                getContext().VoidTy, fn, FI, args);
931
  // Emit an artificial location for this function.
932
342
  auto AL = ApplyDebugLocation::CreateArtificial(*this);
933
934
342
  emitDestroy(addr, type, destroyer, useEHCleanupForArray);
935
936
342
  FinishFunction();
937
938
342
  return fn;
939
342
}