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Centralize the handling of the thumb bit.

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This patch centralizes the handling of the thumb bit around
MCStreamer::isThumbFunc and makes isThumbFunc handle aliases.

This fixes a corner case, but the main advantage is having just one
way to check if a MCSymbol is thumb or not. This should still be
refactored to be ARM only, but at least now it is just one predicate
that has to be refactored instead of 3 (isThumbFunc,
ELF_Other_ThumbFunc, and SF_ThumbFunc).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207522 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-04-29 12:46:50 +00:00
parent 65baf804ba
commit 1c5f439f41
9 changed files with 59 additions and 29 deletions
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6
include/llvm/MC/MCAssembler.h
View File

@@ -902,7 +902,7 @@ private:
// here. Maybe when the relocation stuff moves to target specific,
// this can go with it? The streamer would need some target specific
// refactoring too.
SmallPtrSet<const MCSymbol*, 64> ThumbFuncs;
mutable SmallPtrSet<const MCSymbol*, 64> ThumbFuncs;
/// \brief The bundle alignment size currently set in the assembler.
///
@@ -995,9 +995,7 @@ public:
const MCAsmLayout &Layout) const;
/// Check whether a given symbol has been flagged with .thumb_func.
bool isThumbFunc(const MCSymbol *Func) const {
return ThumbFuncs.count(Func);
}
bool isThumbFunc(const MCSymbol *Func) const;
/// Flag a function symbol as the target of a .thumb_func directive.
void setIsThumbFunc(const MCSymbol *Func) { ThumbFuncs.insert(Func); }

8
include/llvm/MC/MCELFSymbolFlags.h
View File

@@ -24,9 +24,7 @@ namespace llvm {
ELF_STT_Shift = 0, // Shift value for STT_* flags.
ELF_STB_Shift = 4, // Shift value for STB_* flags.
ELF_STV_Shift = 8, // Shift value for STV_* flags.
ELF_STO_Shift = 10, // Shift value for STO_* flags.
ELF_Other_Shift = 16 // Shift value for llvm local flags,
// not part of the final object file
ELF_STO_Shift = 10 // Shift value for STO_* flags.
};
enum ELFSymbolFlags {
@@ -49,9 +47,7 @@ namespace llvm {
ELF_STV_Default = (ELF::STV_DEFAULT << ELF_STV_Shift),
ELF_STV_Internal = (ELF::STV_INTERNAL << ELF_STV_Shift),
ELF_STV_Hidden = (ELF::STV_HIDDEN << ELF_STV_Shift),
ELF_STV_Protected = (ELF::STV_PROTECTED << ELF_STV_Shift),
ELF_Other_ThumbFunc = (1 << ELF_Other_Shift)
ELF_STV_Protected = (ELF::STV_PROTECTED << ELF_STV_Shift)
};
} // end namespace llvm