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Avoid unnecessary section switching. NFC.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237913 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-05-21 17:00:40 +00:00
parent 43356a1a45
commit e0376b0782
3 changed files with 4 additions and 5 deletions
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4
include/llvm/MC/MCObjectStreamer.h
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@@ -147,8 +147,8 @@ public:
bool emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo, bool emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
unsigned Size) override; unsigned Size) override;
bool mayHaveInstructions() const override { bool mayHaveInstructions(const MCSection &Sec) const override {
return getCurrentSectionData()->hasInstructions(); return Assembler->getOrCreateSectionData(Sec).hasInstructions();
} }
}; };

2
include/llvm/MC/MCStreamer.h
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@@ -728,7 +728,7 @@ public:
/// \brief Finish emission of machine code. /// \brief Finish emission of machine code.
void Finish(); void Finish();
virtual bool mayHaveInstructions() const { return true; } virtual bool mayHaveInstructions(const MCSection &Sec) const { return true; }
}; };
/// Create a dummy machine code streamer, which does nothing. This is useful for /// Create a dummy machine code streamer, which does nothing. This is useful for

3
lib/MC/MCContext.cpp
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@@ -442,8 +442,7 @@ bool MCContext::isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID) {
void MCContext::finalizeDwarfSections(MCStreamer &MCOS) { void MCContext::finalizeDwarfSections(MCStreamer &MCOS) {
std::vector<const MCSection *> Keep; std::vector<const MCSection *> Keep;
for (const MCSection *Sec : SectionsForRanges) { for (const MCSection *Sec : SectionsForRanges) {
MCOS.SwitchSection(Sec); // FIXME: pass the section to mayHaveInstructions if (MCOS.mayHaveInstructions(*Sec))
if (MCOS.mayHaveInstructions())
Keep.push_back(Sec); Keep.push_back(Sec);
} }
SectionsForRanges.clear(); SectionsForRanges.clear();