From 0007489312ecb1b51ae275f1e452786480151a4c Mon Sep 17 00:00:00 2001 From: Rafael Espindola Date: Fri, 17 Sep 2010 22:34:41 +0000 Subject: Avoid relocations in a common case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114229 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/MC/ELFObjectWriter.cpp | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'lib/MC/ELFObjectWriter.cpp') 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) { -- cgit v1.2.3-18-g5258