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Pass boolean constants into function calls more efficiently, generating: 

mov DWORD PTR [%ESP + 4], 1

instead of:

        mov %EAX, 1
        mov DWORD PTR [%ESP + 4], %EAX

llvm-svn: 13494
This commit is contained in:
Chris Lattner 2004-05-12 16:35:04 +00:00
parent 66219abac7
commit e2d382e1a4
1 changed files with 7 additions and 1 deletions
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8
llvm/lib/Target/X86/InstSelectSimple.cpp
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@ -1207,7 +1207,7 @@ void ISel::promote32(unsigned targetReg, const ValueRecord &VR) {
// copy.
if (ConstantInt *CI = dyn_cast<ConstantInt>(Val)) {
int TheVal = CI->getRawValue() & 0xFFFFFFFF;
BuildMI(BB, X86::MOV32ri, 1, targetReg).addImm(TheVal);
BuildMI(BB, X86::MOV32ri, 1, targetReg).addImm(TheVal);
return;
}
}
@ -1405,6 +1405,12 @@ void ISel::doCall(const ValueRecord &Ret, MachineInstr *CallMI,
unsigned ArgReg;
switch (getClassB(Args[i].Ty)) {
case cByte:
if (Args[i].Val && isa<ConstantBool>(Args[i].Val)) {
addRegOffset(BuildMI(BB, X86::MOV32mi, 5), X86::ESP, ArgOffset)
.addImm(Args[i].Val == ConstantBool::True);
break;
}
// FALL THROUGH
case cShort:
if (Args[i].Val && isa<ConstantInt>(Args[i].Val)) {
// Zero/Sign extend constant, then stuff into memory.