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Added support for callee- and caller-save registers. 

llvm-svn: 4897
This commit is contained in:
Misha Brukman 2002-12-03 23:11:21 +00:00
parent 9e4163539f
commit d9522256d3
2 changed files with 30 additions and 0 deletions
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25
llvm/lib/Target/X86/X86RegisterInfo.cpp
View File

@ -56,3 +56,28 @@ unsigned X86RegisterInfo::getFramePointer() const {
unsigned X86RegisterInfo::getStackPointer() const {
return X86::ESP;
}
const unsigned* X86RegisterInfo::getCalleeSaveRegs() const {
static const unsigned CalleeSaveRegs[] = { X86::ESI, X86::EDI, X86::EBX, X86::EBP,
MRegisterInfo::NoRegister };
return CalleeSaveRegs;
}
const unsigned* X86RegisterInfo::getCallerSaveRegs() const {
static const unsigned CallerSaveRegs[] = { X86::EAX, X86::ECX, X86::EDX,
MRegisterInfo::NoRegister };
return CallerSaveRegs;
}
void
X86RegisterInfo::buildReg2RegClassMap
(std::map<unsigned,
const TargetRegisterClass*>& Reg2RegClassMap) const
{
for (MRegisterInfo::const_iterator I = const_regclass_begin(),
E = const_regclass_end(); I != E; ++I)
{
I->buildReg2RegClassMap(Reg2RegClassMap);
}
}

5
llvm/lib/Target/X86/X86RegisterInfo.h
View File

@ -32,6 +32,9 @@ struct X86RegisterInfo : public MRegisterInfo {
unsigned getFramePointer() const;
unsigned getStackPointer() const;
const unsigned* getCalleeSaveRegs() const;
const unsigned* getCallerSaveRegs() const;
/// Returns register class appropriate for input SSA register
///
const TargetRegisterClass *getClassForReg(unsigned Reg) const;
@ -40,6 +43,8 @@ struct X86RegisterInfo : public MRegisterInfo {
unsigned getNumRegClasses() const;
void buildReg2RegClassMap(std::map<unsigned,const TargetRegisterClass*>&
Reg2RegClassMap) const;
};