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comparison lib/Target/TargetLoweringObjectFile.cpp @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 1172e4bd9c6f
children 3a76565eade5
comparison
equal deleted inserted replaced
120:1172e4bd9c6f 121:803732b1fca8
11 // object file formats. 11 // object file formats.
12 // 12 //
13 //===----------------------------------------------------------------------===// 13 //===----------------------------------------------------------------------===//
14 14
15 #include "llvm/Target/TargetLoweringObjectFile.h" 15 #include "llvm/Target/TargetLoweringObjectFile.h"
16 #include "llvm/BinaryFormat/Dwarf.h"
16 #include "llvm/IR/Constants.h" 17 #include "llvm/IR/Constants.h"
17 #include "llvm/IR/DataLayout.h" 18 #include "llvm/IR/DataLayout.h"
18 #include "llvm/IR/DerivedTypes.h" 19 #include "llvm/IR/DerivedTypes.h"
19 #include "llvm/IR/Function.h" 20 #include "llvm/IR/Function.h"
20 #include "llvm/IR/GlobalVariable.h" 21 #include "llvm/IR/GlobalVariable.h"
22 #include "llvm/MC/MCAsmInfo.h" 23 #include "llvm/MC/MCAsmInfo.h"
23 #include "llvm/MC/MCContext.h" 24 #include "llvm/MC/MCContext.h"
24 #include "llvm/MC/MCExpr.h" 25 #include "llvm/MC/MCExpr.h"
25 #include "llvm/MC/MCStreamer.h" 26 #include "llvm/MC/MCStreamer.h"
26 #include "llvm/MC/MCSymbol.h" 27 #include "llvm/MC/MCSymbol.h"
27 #include "llvm/Support/Dwarf.h"
28 #include "llvm/Support/ErrorHandling.h" 28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/raw_ostream.h" 29 #include "llvm/Support/raw_ostream.h"
30 #include "llvm/Target/TargetLowering.h" 30 #include "llvm/Target/TargetLowering.h"
31 #include "llvm/Target/TargetMachine.h" 31 #include "llvm/Target/TargetMachine.h"
32 #include "llvm/Target/TargetOptions.h" 32 #include "llvm/Target/TargetOptions.h"
42 /// lowering implementations a chance to set up their default sections. 42 /// lowering implementations a chance to set up their default sections.
43 void TargetLoweringObjectFile::Initialize(MCContext &ctx, 43 void TargetLoweringObjectFile::Initialize(MCContext &ctx,
44 const TargetMachine &TM) { 44 const TargetMachine &TM) {
45 Ctx = &ctx; 45 Ctx = &ctx;
46 // `Initialize` can be called more than once. 46 // `Initialize` can be called more than once.
47 if (Mang != nullptr) delete Mang; 47 delete Mang;
48 Mang = new Mangler(); 48 Mang = new Mangler();
49 InitMCObjectFileInfo(TM.getTargetTriple(), TM.isPositionIndependent(), 49 InitMCObjectFileInfo(TM.getTargetTriple(), TM.isPositionIndependent(), *Ctx,
50 TM.getCodeModel(), *Ctx); 50 TM.getCodeModel() == CodeModel::Large);
51 } 51 }
52 52
53 TargetLoweringObjectFile::~TargetLoweringObjectFile() { 53 TargetLoweringObjectFile::~TargetLoweringObjectFile() {
54 delete Mang; 54 delete Mang;
55 } 55 }
238 const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const { 238 const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
239 // Select section name. 239 // Select section name.
240 if (GO->hasSection()) 240 if (GO->hasSection())
241 return getExplicitSectionGlobal(GO, Kind, TM); 241 return getExplicitSectionGlobal(GO, Kind, TM);
242 242
243 if (auto *GVar = dyn_cast<GlobalVariable>(GO)) {
244 auto Attrs = GVar->getAttributes();
245 if ((Attrs.hasAttribute("bss-section") && Kind.isBSS()) ||
246 (Attrs.hasAttribute("data-section") && Kind.isData()) ||
247 (Attrs.hasAttribute("rodata-section") && Kind.isReadOnly())) {
248 return getExplicitSectionGlobal(GO, Kind, TM);
249 }
250 }
251
252 if (auto *F = dyn_cast<Function>(GO)) {
253 if (F->hasFnAttribute("implicit-section-name"))
254 return getExplicitSectionGlobal(GO, Kind, TM);
255 }
256
243 // Use default section depending on the 'type' of global 257 // Use default section depending on the 'type' of global
244 return SelectSectionForGlobal(GO, Kind, TM); 258 return SelectSectionForGlobal(GO, Kind, TM);
245 } 259 }
246 260
247 MCSection *TargetLoweringObjectFile::getSectionForJumpTable( 261 MCSection *TargetLoweringObjectFile::getSectionForJumpTable(
262 276
263 // We should also do if the section name is NULL or function is declared 277 // We should also do if the section name is NULL or function is declared
264 // in discardable section 278 // in discardable section
265 // FIXME: this isn't the right predicate, should be based on the MCSection 279 // FIXME: this isn't the right predicate, should be based on the MCSection
266 // for the function. 280 // for the function.
267 if (F.isWeakForLinker()) 281 return F.isWeakForLinker();
268 return true;
269
270 return false;
271 } 282 }
272 283
273 /// Given a mergable constant with the specified size and relocation 284 /// Given a mergable constant with the specified size and relocation
274 /// information, return a section that it should be placed in. 285 /// information, return a section that it should be placed in.
275 MCSection *TargetLoweringObjectFile::getSectionForConstant( 286 MCSection *TargetLoweringObjectFile::getSectionForConstant(