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Fix a bug in the previous patch

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31342 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-11-01 04:55:47 +00:00
parent 7da52b295b
commit a90a24c623
1 changed files with 6 additions and 3 deletions
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9
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -6787,13 +6787,16 @@ Instruction *InstCombiner::FoldPHIArgBinOpIntoPHI(PHINode &PN) {
Instruction *FirstInst = cast<Instruction>(PN.getIncomingValue(0)); Instruction *FirstInst = cast<Instruction>(PN.getIncomingValue(0));
assert(isa<BinaryOperator>(FirstInst) || isa<ShiftInst>(FirstInst)); assert(isa<BinaryOperator>(FirstInst) || isa<ShiftInst>(FirstInst));
unsigned Opc = FirstInst->getOpcode(); unsigned Opc = FirstInst->getOpcode();
const Type *LHSType = FirstInst->getOperand(0)->getType();
// Scan to see if all operands are the same opcode, all have one use, and all // Scan to see if all operands are the same opcode, all have one use, and all
// kill their operands (i.e. the operands have one use). // kill their operands (i.e. the operands have one use).
unsigned NumValues = PN.getNumIncomingValues(); for (unsigned i = 0; i != PN.getNumIncomingValues(); ++i) {
for (unsigned i = 0; i != NumValues; ++i) {
Instruction *I = dyn_cast<Instruction>(PN.getIncomingValue(i)); Instruction *I = dyn_cast<Instruction>(PN.getIncomingValue(i));
if (!I || I->getOpcode() != Opc || !I->hasOneUse()) if (!I || I->getOpcode() != Opc || !I->hasOneUse() ||
// Verify type of the LHS matches so we don't fold setcc's of different
// types.
I->getOperand(0)->getType() != LHSType)
return 0; return 0;
} }