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| author | Rafael Espindola <rafael.espindola@gmail.com> | 2010-09-17 22:34:41 +0000 |
|---|---|---|
| committer | Rafael Espindola <rafael.espindola@gmail.com> | 2010-09-17 22:34:41 +0000 |
| commit | 0007489312ecb1b51ae275f1e452786480151a4c (patch) | |
| tree | af2f51a98f2231e7040059a5fdf43c813e9c7640 /lib/MC/ELFObjectWriter.cpp | |
| parent | 6edb0eac87a6e46b89de3ad5d8e39c41969e2a54 (diff) | |
| download | llvm-0007489312ecb1b51ae275f1e452786480151a4c.tar.gz llvm-0007489312ecb1b51ae275f1e452786480151a4c.tar.bz2 llvm-0007489312ecb1b51ae275f1e452786480151a4c.tar.xz | |
Avoid relocations in a common case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114229 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/MC/ELFObjectWriter.cpp')
| -rw-r--r-- | lib/MC/ELFObjectWriter.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp index 8295dacd15..d0fc9cac47 100644 --- a/lib/MC/ELFObjectWriter.cpp +++ b/lib/MC/ELFObjectWriter.cpp @@ -470,12 +470,22 @@ void ELFObjectWriterImpl::RecordRelocation(const MCAssembler &Asm, unsigned Index = 0; int64_t Value = Target.getConstant(); + bool IsPCRel = isFixupKindX86PCRel(Fixup.getKind()); if (!Target.isAbsolute()) { const MCSymbol *Symbol = &Target.getSymA()->getSymbol(); MCSymbolData &SD = Asm.getSymbolData(*Symbol); const MCSymbolData *Base = Asm.getAtom(Layout, &SD); MCFragment *F = SD.getFragment(); + // Avoid relocations for cases like jumps and calls in the same file. + if (Symbol->isDefined() && !SD.isExternal() && + IsPCRel && + &Fragment->getParent()->getSection() == &Symbol->getSection()) { + uint64_t FixupAddr = Layout.getFragmentAddress(Fragment) + Fixup.getOffset(); + FixedValue = Layout.getSymbolAddress(&SD) + Target.getConstant() - FixupAddr; + return; + } + if (Base) { if (F && (!Symbol->isInSection() || SD.isCommon()) && !SD.isExternal()) { Index = F->getParent()->getOrdinal() + LocalSymbolData.size() + 1; @@ -507,7 +517,6 @@ void ELFObjectWriterImpl::RecordRelocation(const MCAssembler &Asm, FixedValue = Value; // determine the type of the relocation - bool IsPCRel = isFixupKindX86PCRel(Fixup.getKind()); unsigned Type; if (Is64Bit) { if (IsPCRel) { |