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Pass boolean constants into function calls more efficiently, generating:

Browse Source 
mov DWORD PTR [%ESP + 4], 1

instead of:

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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13494 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-05-12 16:35:04 +00:00
parent 587992721c
commit 2b10b08ad6
2 changed files with 14 additions and 2 deletions
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8
lib/Target/X86/InstSelectSimple.cpp
View File

@ -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.

8
lib/Target/X86/X86ISelSimple.cpp
View File

@ -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.