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implement isStoreToStackSlot 

llvm-svn: 25911
This commit is contained in:
Chris Lattner 2006-02-02 20:00:41 +00:00
parent 0acc90c67e
commit 246ee44c8f
1 changed files with 23 additions and 0 deletions
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23
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -139,6 +139,29 @@ unsigned X86RegisterInfo::isLoadFromStackSlot(MachineInstr *MI,
return 0;
}
unsigned X86RegisterInfo::isStoreToStackSlot(MachineInstr *MI,
int &FrameIndex) const {
switch (MI->getOpcode()) {
default: break;
case X86::MOV8mr:
case X86::MOV16mr:
case X86::MOV32mr:
case X86::FpSTP64m:
case X86::MOVSSmr:
case X86::MOVSDmr:
if (MI->getOperand(0).isFrameIndex() && MI->getOperand(1).isImmediate() &&
MI->getOperand(2).isRegister() && MI->getOperand(3).isImmediate() &&
MI->getOperand(3).getImmedValue() == 1 &&
MI->getOperand(4).getReg() == 0 &&
MI->getOperand(5).getImmedValue() == 0) {
FrameIndex = MI->getOperand(1).getFrameIndex();
return MI->getOperand(4).getReg();
}
break;
}
return 0;
}
static MachineInstr *MakeMInst(unsigned Opcode, unsigned FrameIndex,
MachineInstr *MI) {