forked from OSchip/llvm-project
Disable bogus cast elimination when the cast is used by a setcc instruction.
llvm-svn: 17583
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f45ec621cc
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f5f0b6b6b0
llvm/lib/Target/PowerPC
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@ -3163,15 +3163,15 @@ void PPC32ISel::visitCastInst(CastInst &CI) {
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// emit them, as the store instruction will implicitly not store the zero or
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// sign extended bytes.
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if (SrcClass <= cInt && SrcClass >= DestClass) {
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bool AllUsesAreStoresOrSetCC = true;
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bool AllUsesAreStores = true;
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for (Value::use_iterator I = CI.use_begin(), E = CI.use_end(); I != E; ++I)
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if (!isa<StoreInst>(*I) && !isa<SetCondInst>(*I)) {
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AllUsesAreStoresOrSetCC = false;
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if (!isa<StoreInst>(*I)) {
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AllUsesAreStores = false;
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break;
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}
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// Turn this cast directly into a move instruction, which the register
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// allocator will deal with.
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if (AllUsesAreStoresOrSetCC) {
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if (AllUsesAreStores) {
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unsigned SrcReg = getReg(Op, BB, MI);
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BuildMI(*BB, MI, PPC::OR, 2, DestReg).addReg(SrcReg).addReg(SrcReg);
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return;
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