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Disable bogus cast elimination when the cast is used by a setcc instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17583 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2004-11-07 20:23:42 +00:00
parent 18224032d3
commit 075cdc655e
1 changed files with 4 additions and 4 deletions
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8
lib/Target/PowerPC/PPC32ISelSimple.cpp
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@ -3163,15 +3163,15 @@ void PPC32ISel::visitCastInst(CastInst &CI) {
// emit them, as the store instruction will implicitly not store the zero or
// sign extended bytes.
if (SrcClass <= cInt && SrcClass >= DestClass) {
bool AllUsesAreStoresOrSetCC = true;
bool AllUsesAreStores = true;
for (Value::use_iterator I = CI.use_begin(), E = CI.use_end(); I != E; ++I)
if (!isa<StoreInst>(*I) && !isa<SetCondInst>(*I)) {
AllUsesAreStoresOrSetCC = false;
if (!isa<StoreInst>(*I)) {
AllUsesAreStores = false;
break;
}
// Turn this cast directly into a move instruction, which the register
// allocator will deal with.
if (AllUsesAreStoresOrSetCC) {
if (AllUsesAreStores) {
unsigned SrcReg = getReg(Op, BB, MI);
BuildMI(*BB, MI, PPC::OR, 2, DestReg).addReg(SrcReg).addReg(SrcReg);
return;