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In PIC mode, GV not requiring an extra load can be used as address immediate. 

llvm-svn: 32028
This commit is contained in:
Evan Cheng 2006-11-29 23:48:14 +00:00
parent 8c84c7cd0d
commit 7a9238c84d
1 changed files with 7 additions and 14 deletions
llvm/lib/Target/X86
X86ISelLowering.cpp

21
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -4994,21 +4994,14 @@ bool X86TargetLowering::isLegalAddressImmediate(int64_t V) const {
}
bool X86TargetLowering::isLegalAddressImmediate(GlobalValue *GV) const {
// GV is 64-bit but displacement field is 32-bit unless we are in small code
// model. Mac OS X happens to support only small PIC code model.
// FIXME: better support for other OS's.
if (Subtarget->is64Bit() && !Subtarget->isTargetDarwin())
// In 64-bit mode, GV is 64-bit so it won't fit in the 32-bit displacement
// field unless we are in small code model.
if (Subtarget->is64Bit() &&
getTargetMachine().getCodeModel() != CodeModel::Small)
return false;
if (Subtarget->isTargetDarwin()) {
Reloc::Model RModel = getTargetMachine().getRelocationModel();
if (RModel == Reloc::Static)
return true;
else if (RModel == Reloc::DynamicNoPIC)
return !(Subtarget->GVRequiresExtraLoad(GV, false));
else
return false;
} else
return true;
Reloc::Model RModel = getTargetMachine().getRelocationModel();
return (RModel == Reloc::Static) ||
!Subtarget->GVRequiresExtraLoad(GV, false);
}
/// isShuffleMaskLegal - Targets can use this to indicate that they only