/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/Target/Hexagon/HexagonTargetObjectFile.cpp
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1 | | //===-- HexagonTargetObjectFile.cpp ---------------------------------------===// |
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 file contains the declarations of the HexagonTargetAsmInfo properties. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #define DEBUG_TYPE "hexagon-sdata" |
14 | | |
15 | | #include "HexagonTargetObjectFile.h" |
16 | | #include "llvm/ADT/SmallString.h" |
17 | | #include "llvm/ADT/StringRef.h" |
18 | | #include "llvm/ADT/Twine.h" |
19 | | #include "llvm/BinaryFormat/ELF.h" |
20 | | #include "llvm/IR/DataLayout.h" |
21 | | #include "llvm/IR/DerivedTypes.h" |
22 | | #include "llvm/IR/GlobalObject.h" |
23 | | #include "llvm/IR/GlobalValue.h" |
24 | | #include "llvm/IR/GlobalVariable.h" |
25 | | #include "llvm/IR/Type.h" |
26 | | #include "llvm/MC/MCContext.h" |
27 | | #include "llvm/MC/SectionKind.h" |
28 | | #include "llvm/Support/Casting.h" |
29 | | #include "llvm/Support/CommandLine.h" |
30 | | #include "llvm/Support/Debug.h" |
31 | | #include "llvm/Support/raw_ostream.h" |
32 | | #include "llvm/Target/TargetMachine.h" |
33 | | |
34 | | using namespace llvm; |
35 | | |
36 | | static cl::opt<unsigned> SmallDataThreshold("hexagon-small-data-threshold", |
37 | | cl::init(8), cl::Hidden, |
38 | | cl::desc("The maximum size of an object in the sdata section")); |
39 | | |
40 | | static cl::opt<bool> NoSmallDataSorting("mno-sort-sda", cl::init(false), |
41 | | cl::Hidden, cl::desc("Disable small data sections sorting")); |
42 | | |
43 | | static cl::opt<bool> StaticsInSData("hexagon-statics-in-small-data", |
44 | | cl::init(false), cl::Hidden, cl::ZeroOrMore, |
45 | | cl::desc("Allow static variables in .sdata")); |
46 | | |
47 | | static cl::opt<bool> TraceGVPlacement("trace-gv-placement", |
48 | | cl::Hidden, cl::init(false), |
49 | | cl::desc("Trace global value placement")); |
50 | | |
51 | | static cl::opt<bool> |
52 | | EmitJtInText("hexagon-emit-jt-text", cl::Hidden, cl::init(false), |
53 | | cl::desc("Emit hexagon jump tables in function section")); |
54 | | |
55 | | static cl::opt<bool> |
56 | | EmitLutInText("hexagon-emit-lut-text", cl::Hidden, cl::init(false), |
57 | | cl::desc("Emit hexagon lookup tables in function section")); |
58 | | |
59 | | // TraceGVPlacement controls messages for all builds. For builds with assertions |
60 | | // (debug or release), messages are also controlled by the usual debug flags |
61 | | // (e.g. -debug and -debug-only=globallayout) |
62 | 0 | #define TRACE_TO(s, X) s << X |
63 | | #ifdef NDEBUG |
64 | | #define TRACE(X) \ |
65 | 27.7k | do { \ |
66 | 22.5k | if (TraceGVPlacement) { \ |
67 | 0 | TRACE_TO(errs(), X); \ |
68 | 0 | } \ |
69 | 22.5k | } while (false) |
70 | | #else |
71 | | #define TRACE(X) \ |
72 | | do { \ |
73 | | if (TraceGVPlacement) { \ |
74 | | TRACE_TO(errs(), X); \ |
75 | | } else { \ |
76 | | LLVM_DEBUG(TRACE_TO(dbgs(), X)); \ |
77 | | } \ |
78 | | } while (false) |
79 | | #endif |
80 | | |
81 | | // Returns true if the section name is such that the symbol will be put |
82 | | // in a small data section. |
83 | | // For instance, global variables with section attributes such as ".sdata" |
84 | | // ".sdata.*", ".sbss", and ".sbss.*" will go into small data. |
85 | 47 | static bool isSmallDataSection(StringRef Sec) { |
86 | 47 | // sectionName is either ".sdata" or ".sbss". Looking for an exact match |
87 | 47 | // obviates the need for checks for section names such as ".sdatafoo". |
88 | 47 | if (Sec.equals(".sdata") || Sec.equals(".sbss")40 || Sec.equals(".scommon")38 ) |
89 | 9 | return true; |
90 | 38 | // If either ".sdata." or ".sbss." is a substring of the section name |
91 | 38 | // then put the symbol in small data. |
92 | 38 | return Sec.find(".sdata.") != StringRef::npos || |
93 | 38 | Sec.find(".sbss.") != StringRef::npos36 || |
94 | 38 | Sec.find(".scommon.") != StringRef::npos34 ; |
95 | 38 | } |
96 | | |
97 | 360 | static const char *getSectionSuffixForSize(unsigned Size) { |
98 | 360 | switch (Size) { |
99 | 360 | default: |
100 | 0 | return ""; |
101 | 360 | case 1: |
102 | 24 | return ".1"; |
103 | 360 | case 2: |
104 | 18 | return ".2"; |
105 | 360 | case 4: |
106 | 197 | return ".4"; |
107 | 360 | case 8: |
108 | 121 | return ".8"; |
109 | 360 | } |
110 | 360 | } |
111 | | |
112 | | void HexagonTargetObjectFile::Initialize(MCContext &Ctx, |
113 | 918 | const TargetMachine &TM) { |
114 | 918 | TargetLoweringObjectFileELF::Initialize(Ctx, TM); |
115 | 918 | InitializeELF(TM.Options.UseInitArray); |
116 | 918 | |
117 | 918 | SmallDataSection = |
118 | 918 | getContext().getELFSection(".sdata", ELF::SHT_PROGBITS, |
119 | 918 | ELF::SHF_WRITE | ELF::SHF_ALLOC | |
120 | 918 | ELF::SHF_HEX_GPREL); |
121 | 918 | SmallBSSSection = |
122 | 918 | getContext().getELFSection(".sbss", ELF::SHT_NOBITS, |
123 | 918 | ELF::SHF_WRITE | ELF::SHF_ALLOC | |
124 | 918 | ELF::SHF_HEX_GPREL); |
125 | 918 | } |
126 | | |
127 | | MCSection *HexagonTargetObjectFile::SelectSectionForGlobal( |
128 | 5.52k | const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { |
129 | 5.52k | TRACE("[SelectSectionForGlobal] GO(" << GO->getName() << ") "); |
130 | 5.52k | TRACE("input section(" << GO->getSection() << ") "); |
131 | 5.52k | |
132 | 5.52k | TRACE((GO->hasPrivateLinkage() ? "private_linkage " : "") |
133 | 5.52k | << (GO->hasLocalLinkage() ? "local_linkage " : "") |
134 | 5.52k | << (GO->hasInternalLinkage() ? "internal " : "") |
135 | 5.52k | << (GO->hasExternalLinkage() ? "external " : "") |
136 | 5.52k | << (GO->hasCommonLinkage() ? "common_linkage " : "") |
137 | 5.52k | << (GO->hasCommonLinkage() ? "common " : "" ) |
138 | 5.52k | << (Kind.isCommon() ? "kind_common " : "" ) |
139 | 5.52k | << (Kind.isBSS() ? "kind_bss " : "" ) |
140 | 5.52k | << (Kind.isBSSLocal() ? "kind_bss_local " : "" )); |
141 | 5.52k | |
142 | 5.52k | // If the lookup table is used by more than one function, do not place |
143 | 5.52k | // it in text section. |
144 | 5.52k | if (EmitLutInText && GO->getName().startswith("switch.table")11 ) { |
145 | 5 | if (const Function *Fn = getLutUsedFunction(GO)) |
146 | 4 | return selectSectionForLookupTable(GO, TM, Fn); |
147 | 5.52k | } |
148 | 5.52k | |
149 | 5.52k | if (isGlobalInSmallSection(GO, TM)) |
150 | 354 | return selectSmallSectionForGlobal(GO, Kind, TM); |
151 | 5.17k | |
152 | 5.17k | if (Kind.isCommon()) { |
153 | 0 | // This is purely for LTO+Linker Script because commons don't really have a |
154 | 0 | // section. However, the BitcodeSectionWriter pass will query for the |
155 | 0 | // sections of commons (and the linker expects us to know their section) so |
156 | 0 | // we'll return one here. |
157 | 0 | return BSSSection; |
158 | 0 | } |
159 | 5.17k | |
160 | 5.17k | TRACE("default_ELF_section\n"); |
161 | 5.17k | // Otherwise, we work the same as ELF. |
162 | 5.17k | return TargetLoweringObjectFileELF::SelectSectionForGlobal(GO, Kind, TM); |
163 | 5.17k | } |
164 | | |
165 | | MCSection *HexagonTargetObjectFile::getExplicitSectionGlobal( |
166 | 30 | const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { |
167 | 30 | TRACE("[getExplicitSectionGlobal] GO(" << GO->getName() << ") from(" |
168 | 30 | << GO->getSection() << ") "); |
169 | 30 | TRACE((GO->hasPrivateLinkage() ? "private_linkage " : "") |
170 | 30 | << (GO->hasLocalLinkage() ? "local_linkage " : "") |
171 | 30 | << (GO->hasInternalLinkage() ? "internal " : "") |
172 | 30 | << (GO->hasExternalLinkage() ? "external " : "") |
173 | 30 | << (GO->hasCommonLinkage() ? "common_linkage " : "") |
174 | 30 | << (GO->hasCommonLinkage() ? "common " : "" ) |
175 | 30 | << (Kind.isCommon() ? "kind_common " : "" ) |
176 | 30 | << (Kind.isBSS() ? "kind_bss " : "" ) |
177 | 30 | << (Kind.isBSSLocal() ? "kind_bss_local " : "" )); |
178 | 30 | |
179 | 30 | if (GO->hasSection()) { |
180 | 30 | StringRef Section = GO->getSection(); |
181 | 30 | if (Section.find(".access.text.group") != StringRef::npos) |
182 | 0 | return getContext().getELFSection(GO->getSection(), ELF::SHT_PROGBITS, |
183 | 0 | ELF::SHF_ALLOC | ELF::SHF_EXECINSTR); |
184 | 30 | if (Section.find(".access.data.group") != StringRef::npos) |
185 | 0 | return getContext().getELFSection(GO->getSection(), ELF::SHT_PROGBITS, |
186 | 0 | ELF::SHF_WRITE | ELF::SHF_ALLOC); |
187 | 30 | } |
188 | 30 | |
189 | 30 | if (isGlobalInSmallSection(GO, TM)) |
190 | 8 | return selectSmallSectionForGlobal(GO, Kind, TM); |
191 | 22 | |
192 | 22 | // Otherwise, we work the same as ELF. |
193 | 22 | TRACE("default_ELF_section\n"); |
194 | 22 | return TargetLoweringObjectFileELF::getExplicitSectionGlobal(GO, Kind, TM); |
195 | 22 | } |
196 | | |
197 | | /// Return true if this global value should be placed into small data/bss |
198 | | /// section. |
199 | | bool HexagonTargetObjectFile::isGlobalInSmallSection(const GlobalObject *GO, |
200 | 7.13k | const TargetMachine &TM) const { |
201 | 7.13k | bool HaveSData = isSmallDataEnabled(TM); |
202 | 7.13k | if (!HaveSData) |
203 | 7.13k | LLVM_DEBUG(dbgs() << "Small-data allocation is disabled, but symbols " |
204 | 7.13k | "may have explicit section assignments...\n"); |
205 | 7.13k | // Only global variables, not functions. |
206 | 7.13k | LLVM_DEBUG(dbgs() << "Checking if value is in small-data, -G" |
207 | 7.13k | << SmallDataThreshold << ": \"" << GO->getName() << "\": "); |
208 | 7.13k | const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GO); |
209 | 7.13k | if (!GVar) { |
210 | 4.98k | LLVM_DEBUG(dbgs() << "no, not a global variable\n"); |
211 | 4.98k | return false; |
212 | 4.98k | } |
213 | 2.14k | |
214 | 2.14k | // Globals with external linkage that have an original section set must be |
215 | 2.14k | // emitted to that section, regardless of whether we would put them into |
216 | 2.14k | // small data or not. This is how we can support mixing -G0/-G8 in LTO. |
217 | 2.14k | if (GVar->hasSection()) { |
218 | 47 | bool IsSmall = isSmallDataSection(GVar->getSection()); |
219 | 47 | LLVM_DEBUG(dbgs() << (IsSmall ? "yes" : "no") |
220 | 47 | << ", has section: " << GVar->getSection() << '\n'); |
221 | 47 | return IsSmall; |
222 | 47 | } |
223 | 2.09k | |
224 | 2.09k | // If sdata is disabled, stop the checks here. |
225 | 2.09k | if (!HaveSData) { |
226 | 145 | LLVM_DEBUG(dbgs() << "no, small-data allocation is disabled\n"); |
227 | 145 | return false; |
228 | 145 | } |
229 | 1.95k | |
230 | 1.95k | if (GVar->isConstant()) { |
231 | 228 | LLVM_DEBUG(dbgs() << "no, is a constant\n"); |
232 | 228 | return false; |
233 | 228 | } |
234 | 1.72k | |
235 | 1.72k | bool IsLocal = GVar->hasLocalLinkage(); |
236 | 1.72k | if (!StaticsInSData && IsLocal) { |
237 | 31 | LLVM_DEBUG(dbgs() << "no, is static\n"); |
238 | 31 | return false; |
239 | 31 | } |
240 | 1.69k | |
241 | 1.69k | Type *GType = GVar->getValueType(); |
242 | 1.69k | if (isa<ArrayType>(GType)) { |
243 | 295 | LLVM_DEBUG(dbgs() << "no, is an array\n"); |
244 | 295 | return false; |
245 | 295 | } |
246 | 1.39k | |
247 | 1.39k | // If the type is a struct with no body provided, treat is conservatively. |
248 | 1.39k | // There cannot be actual definitions of object of such a type in this CU |
249 | 1.39k | // (only references), so assuming that they are not in sdata is safe. If |
250 | 1.39k | // these objects end up in the sdata, the references will still be valid. |
251 | 1.39k | if (StructType *ST = dyn_cast<StructType>(GType)) { |
252 | 48 | if (ST->isOpaque()) { |
253 | 0 | LLVM_DEBUG(dbgs() << "no, has opaque type\n"); |
254 | 0 | return false; |
255 | 0 | } |
256 | 1.39k | } |
257 | 1.39k | |
258 | 1.39k | unsigned Size = GVar->getParent()->getDataLayout().getTypeAllocSize(GType); |
259 | 1.39k | if (Size == 0) { |
260 | 0 | LLVM_DEBUG(dbgs() << "no, has size 0\n"); |
261 | 0 | return false; |
262 | 0 | } |
263 | 1.39k | if (Size > SmallDataThreshold) { |
264 | 417 | LLVM_DEBUG(dbgs() << "no, size exceeds sdata threshold: " << Size << '\n'); |
265 | 417 | return false; |
266 | 417 | } |
267 | 980 | |
268 | 980 | LLVM_DEBUG(dbgs() << "yes\n"); |
269 | 980 | return true; |
270 | 980 | } |
271 | | |
272 | | bool HexagonTargetObjectFile::isSmallDataEnabled(const TargetMachine &TM) |
273 | 12.1k | const { |
274 | 12.1k | return SmallDataThreshold > 0 && !TM.isPositionIndependent()11.9k ; |
275 | 12.1k | } |
276 | | |
277 | 0 | unsigned HexagonTargetObjectFile::getSmallDataSize() const { |
278 | 0 | return SmallDataThreshold; |
279 | 0 | } |
280 | | |
281 | | bool HexagonTargetObjectFile::shouldPutJumpTableInFunctionSection( |
282 | 7 | bool UsesLabelDifference, const Function &F) const { |
283 | 7 | return EmitJtInText; |
284 | 7 | } |
285 | | |
286 | | /// Descends any type down to "elementary" components, |
287 | | /// discovering the smallest addressable one. |
288 | | /// If zero is returned, declaration will not be modified. |
289 | | unsigned HexagonTargetObjectFile::getSmallestAddressableSize(const Type *Ty, |
290 | 365 | const GlobalValue *GV, const TargetMachine &TM) const { |
291 | 365 | // Assign the smallest element access size to the highest |
292 | 365 | // value which assembler can handle. |
293 | 365 | unsigned SmallestElement = 8; |
294 | 365 | |
295 | 365 | if (!Ty) |
296 | 0 | return 0; |
297 | 365 | switch (Ty->getTypeID()) { |
298 | 365 | case Type::StructTyID: { |
299 | 2 | const StructType *STy = cast<const StructType>(Ty); |
300 | 3 | for (auto &E : STy->elements()) { |
301 | 3 | unsigned AtomicSize = getSmallestAddressableSize(E, GV, TM); |
302 | 3 | if (AtomicSize < SmallestElement) |
303 | 2 | SmallestElement = AtomicSize; |
304 | 3 | } |
305 | 2 | return (STy->getNumElements() == 0) ? 00 : SmallestElement; |
306 | 365 | } |
307 | 365 | case Type::ArrayTyID: { |
308 | 0 | const ArrayType *ATy = cast<const ArrayType>(Ty); |
309 | 0 | return getSmallestAddressableSize(ATy->getElementType(), GV, TM); |
310 | 365 | } |
311 | 365 | case Type::VectorTyID: { |
312 | 0 | const VectorType *PTy = cast<const VectorType>(Ty); |
313 | 0 | return getSmallestAddressableSize(PTy->getElementType(), GV, TM); |
314 | 365 | } |
315 | 365 | case Type::PointerTyID: |
316 | 363 | case Type::HalfTyID: |
317 | 363 | case Type::FloatTyID: |
318 | 363 | case Type::DoubleTyID: |
319 | 363 | case Type::IntegerTyID: { |
320 | 363 | const DataLayout &DL = GV->getParent()->getDataLayout(); |
321 | 363 | // It is unfortunate that DL's function take non-const Type*. |
322 | 363 | return DL.getTypeAllocSize(const_cast<Type*>(Ty)); |
323 | 363 | } |
324 | 363 | case Type::FunctionTyID: |
325 | 0 | case Type::VoidTyID: |
326 | 0 | case Type::X86_FP80TyID: |
327 | 0 | case Type::FP128TyID: |
328 | 0 | case Type::PPC_FP128TyID: |
329 | 0 | case Type::LabelTyID: |
330 | 0 | case Type::MetadataTyID: |
331 | 0 | case Type::X86_MMXTyID: |
332 | 0 | case Type::TokenTyID: |
333 | 0 | return 0; |
334 | 0 | } |
335 | 0 | |
336 | 0 | return 0; |
337 | 0 | } |
338 | | |
339 | | MCSection *HexagonTargetObjectFile::selectSmallSectionForGlobal( |
340 | 362 | const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { |
341 | 362 | const Type *GTy = GO->getValueType(); |
342 | 362 | unsigned Size = getSmallestAddressableSize(GTy, GO, TM); |
343 | 362 | |
344 | 362 | // If we have -ffunction-section or -fdata-section then we should emit the |
345 | 362 | // global value to a unique section specifically for it... even for sdata. |
346 | 362 | bool EmitUniquedSection = TM.getDataSections(); |
347 | 362 | |
348 | 362 | TRACE("Small data. Size(" << Size << ")"); |
349 | 362 | // Handle Small Section classification here. |
350 | 362 | if (Kind.isBSS() || Kind.isBSSLocal()37 ) { |
351 | 325 | // If -mno-sort-sda is not set, find out smallest accessible entity in |
352 | 325 | // declaration and add it to the section name string. |
353 | 325 | // Note. It does not track the actual usage of the value, only its de- |
354 | 325 | // claration. Also, compiler adds explicit pad fields to some struct |
355 | 325 | // declarations - they are currently counted towards smallest addres- |
356 | 325 | // sable entity. |
357 | 325 | if (NoSmallDataSorting) { |
358 | 0 | TRACE(" default sbss\n"); |
359 | 0 | return SmallBSSSection; |
360 | 0 | } |
361 | 325 | |
362 | 325 | StringRef Prefix(".sbss"); |
363 | 325 | SmallString<128> Name(Prefix); |
364 | 325 | Name.append(getSectionSuffixForSize(Size)); |
365 | 325 | |
366 | 325 | if (EmitUniquedSection) { |
367 | 0 | Name.append("."); |
368 | 0 | Name.append(GO->getName()); |
369 | 0 | } |
370 | 325 | TRACE(" unique sbss(" << Name << ")\n"); |
371 | 325 | return getContext().getELFSection(Name.str(), ELF::SHT_NOBITS, |
372 | 325 | ELF::SHF_WRITE | ELF::SHF_ALLOC | ELF::SHF_HEX_GPREL); |
373 | 325 | } |
374 | 37 | |
375 | 37 | if (Kind.isCommon()) { |
376 | 0 | // This is purely for LTO+Linker Script because commons don't really have a |
377 | 0 | // section. However, the BitcodeSectionWriter pass will query for the |
378 | 0 | // sections of commons (and the linker expects us to know their section) so |
379 | 0 | // we'll return one here. |
380 | 0 | if (NoSmallDataSorting) |
381 | 0 | return BSSSection; |
382 | 0 | |
383 | 0 | Twine Name = Twine(".scommon") + getSectionSuffixForSize(Size); |
384 | 0 | TRACE(" small COMMON (" << Name << ")\n"); |
385 | 0 |
|
386 | 0 | return getContext().getELFSection(Name.str(), ELF::SHT_NOBITS, |
387 | 0 | ELF::SHF_WRITE | ELF::SHF_ALLOC | |
388 | 0 | ELF::SHF_HEX_GPREL); |
389 | 0 | } |
390 | 37 | |
391 | 37 | // We could have changed sdata object to a constant... in this |
392 | 37 | // case the Kind could be wrong for it. |
393 | 37 | if (Kind.isMergeableConst()) { |
394 | 0 | TRACE(" const_object_as_data "); |
395 | 0 | const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GO); |
396 | 0 | if (GVar->hasSection() && isSmallDataSection(GVar->getSection())) |
397 | 0 | Kind = SectionKind::getData(); |
398 | 0 | } |
399 | 37 | |
400 | 37 | if (Kind.isData()) { |
401 | 35 | if (NoSmallDataSorting) { |
402 | 0 | TRACE(" default sdata\n"); |
403 | 0 | return SmallDataSection; |
404 | 0 | } |
405 | 35 | |
406 | 35 | StringRef Prefix(".sdata"); |
407 | 35 | SmallString<128> Name(Prefix); |
408 | 35 | Name.append(getSectionSuffixForSize(Size)); |
409 | 35 | |
410 | 35 | if (EmitUniquedSection) { |
411 | 0 | Name.append("."); |
412 | 0 | Name.append(GO->getName()); |
413 | 0 | } |
414 | 35 | TRACE(" unique sdata(" << Name << ")\n"); |
415 | 35 | return getContext().getELFSection(Name.str(), ELF::SHT_PROGBITS, |
416 | 35 | ELF::SHF_WRITE | ELF::SHF_ALLOC | ELF::SHF_HEX_GPREL); |
417 | 35 | } |
418 | 2 | |
419 | 2 | TRACE("default ELF section\n"); |
420 | 2 | // Otherwise, we work the same as ELF. |
421 | 2 | return TargetLoweringObjectFileELF::SelectSectionForGlobal(GO, Kind, TM); |
422 | 2 | } |
423 | | |
424 | | // Return the function that uses the lookup table. If there are more |
425 | | // than one live function that uses this look table, bail out and place |
426 | | // the lookup table in default section. |
427 | | const Function * |
428 | 5 | HexagonTargetObjectFile::getLutUsedFunction(const GlobalObject *GO) const { |
429 | 5 | const Function *ReturnFn = nullptr; |
430 | 6 | for (auto U : GO->users()) { |
431 | 6 | // validate each instance of user to be a live function. |
432 | 6 | auto *I = dyn_cast<Instruction>(U); |
433 | 6 | if (!I) |
434 | 0 | continue; |
435 | 6 | auto *Bb = I->getParent(); |
436 | 6 | if (!Bb) |
437 | 0 | continue; |
438 | 6 | auto *UserFn = Bb->getParent(); |
439 | 6 | if (!ReturnFn) |
440 | 5 | ReturnFn = UserFn; |
441 | 1 | else if (ReturnFn != UserFn) |
442 | 1 | return nullptr; |
443 | 6 | } |
444 | 5 | return ReturnFn4 ; |
445 | 5 | } |
446 | | |
447 | | MCSection *HexagonTargetObjectFile::selectSectionForLookupTable( |
448 | 4 | const GlobalObject *GO, const TargetMachine &TM, const Function *Fn) const { |
449 | 4 | |
450 | 4 | SectionKind Kind = SectionKind::getText(); |
451 | 4 | // If the function has explicit section, place the lookup table in this |
452 | 4 | // explicit section. |
453 | 4 | if (Fn->hasSection()) |
454 | 2 | return getExplicitSectionGlobal(Fn, Kind, TM); |
455 | 2 | |
456 | 2 | const auto *FuncObj = dyn_cast<GlobalObject>(Fn); |
457 | 2 | return SelectSectionForGlobal(FuncObj, Kind, TM); |
458 | 2 | } |