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Move alignment from MCSectionData to MCSection.

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This starts merging MCSection and MCSectionData.

There are a few issues with the current split between MCSection and
MCSectionData.

* It optimizes the the not as important case. We want the production
of .o files to be really fast, but the split puts the information used
for .o emission in a separate data structure.

* The ELF/COFF/MachO hierarchy is not represented in MCSectionData,
leading to some ad-hoc ways to represent the various flags.

* It makes it harder to remember where each item is.

The attached patch starts merging the two by moving the alignment from
MCSectionData to MCSection.

Most of the patch is actually just dropping 'const', since
MCSectionData is mutable, but MCSection was not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237936 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-05-21 19:20:38 +00:00
parent 4c919af335
commit 7521964d28
85 changed files with 619 additions and 686 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
View File

@ -46,20 +46,19 @@ public:
/// Given a constant with the SectionKind, return a section that it should be
/// placed in.
const MCSection *getSectionForConstant(SectionKind Kind,
const Constant *C) const override;
MCSection *getSectionForConstant(SectionKind Kind,
const Constant *C) const override;
const MCSection *getExplicitSectionGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
const MCSection *SelectSectionForGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
const MCSection *
getSectionForJumpTable(const Function &F, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
const TargetMachine &TM) const override;
bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
const Function &F) const override;
@ -78,10 +77,10 @@ public:
MachineModuleInfo *MMI) const override;
void InitializeELF(bool UseInitArray_);
const MCSection *getStaticCtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
const MCSection *getStaticDtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
MCSection *getStaticCtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
MCSection *getStaticDtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
};
@ -100,18 +99,16 @@ public:
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler &Mang, const TargetMachine &TM) const override;
const MCSection *
SelectSectionForGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
const MCSection *
getExplicitSectionGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
const MCSection *getSectionForConstant(SectionKind Kind,
const Constant *C) const override;
MCSection *getSectionForConstant(SectionKind Kind,
const Constant *C) const override;
/// The mach-o version of this method defaults to returning a stub reference.
const MCExpr *
@ -138,23 +135,20 @@ class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
public:
~TargetLoweringObjectFileCOFF() override {}
const MCSection *
getExplicitSectionGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
const MCSection *
SelectSectionForGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
bool CannotUsePrivateLabel, Mangler &Mang,
const TargetMachine &TM) const override;
const MCSection *
getSectionForJumpTable(const Function &F, Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
const TargetMachine &TM) const override;
/// Extract the dependent library name from a linker option string. Returns
/// StringRef() if the option does not specify a library.
@ -166,10 +160,10 @@ public:
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler &Mang, const TargetMachine &TM) const override;
const MCSection *getStaticCtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
const MCSection *getStaticDtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
MCSection *getStaticCtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
MCSection *getStaticDtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
};
} // end namespace llvm