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Handle stores of global address as stores of immediates. Instead of:

Browse Source 
test1:
        movl $N, %eax
        movl %eax, G
        ret

emit:

test1:
        movl $N, G
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21407 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-04-21 19:11:03 +00:00
parent 75f354bd7a
commit 109026290b
1 changed files with 5 additions and 0 deletions
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5
lib/Target/X86/X86ISelSimple.cpp
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@@ -1620,6 +1620,9 @@ void X86ISel::doCall(const ValueRecord &Ret, MachineInstr *CallMI,
} else if (Args[i].Val && isa<ConstantPointerNull>(Args[i].Val)) {
addRegOffset(BuildMI(BB, X86::MOV32mi, 5),
X86::ESP, ArgOffset).addImm(0);
} else if (Args[i].Val && isa<GlobalValue>(Args[i].Val)) {
addRegOffset(BuildMI(BB, X86::MOV32mi, 5), X86::ESP, ArgOffset)
.addGlobalAddress(cast<GlobalValue>(Args[i].Val));
} else {
ArgReg = Args[i].Val ? getReg(Args[i].Val) : Args[i].Reg;
addRegOffset(BuildMI(BB, X86::MOV32mr, 5),
@@ -3311,6 +3314,8 @@ void X86ISel::visitStoreInst(StoreInst &I) {
}
} else if (isa<ConstantPointerNull>(I.getOperand(0))) {
addFullAddress(BuildMI(BB, X86::MOV32mi, 5), AM).addImm(0);
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(0))) {
addFullAddress(BuildMI(BB, X86::MOV32mi, 5), AM).addGlobalAddress(GV);
} else if (ConstantBool *CB = dyn_cast<ConstantBool>(I.getOperand(0))) {
addFullAddress(BuildMI(BB, X86::MOV8mi, 5), AM).addImm(CB->getValue());
} else if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0))) {