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Don't grab the condition of unconditional branches! 

This fixes PR363

llvm-svn: 14076
This commit is contained in:
Chris Lattner 2004-06-08 21:50:30 +00:00
parent c365e7cc99
commit 4c7a24af44
1 changed files with 8 additions and 7 deletions
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15
llvm/lib/Analysis/LoopInfo.cpp
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@ -442,14 +442,15 @@ Value *Loop::getTripCount() const {
IV->getIncomingBlock(contains(IV->getIncomingBlock(1)));
if (BranchInst *BI = dyn_cast<BranchInst>(BackedgeBlock->getTerminator()))
if (SetCondInst *SCI = dyn_cast<SetCondInst>(BI->getCondition()))
if (SCI->getOperand(0) == Inc)
if (BI->getSuccessor(0) == getHeader()) {
if (SCI->getOpcode() == Instruction::SetNE)
if (BI->isConditional())
if (SetCondInst *SCI = dyn_cast<SetCondInst>(BI->getCondition()))
if (SCI->getOperand(0) == Inc)
if (BI->getSuccessor(0) == getHeader()) {
if (SCI->getOpcode() == Instruction::SetNE)
return SCI->getOperand(1);
} else if (SCI->getOpcode() == Instruction::SetEQ) {
return SCI->getOperand(1);
} else if (SCI->getOpcode() == Instruction::SetEQ) {
return SCI->getOperand(1);
}
}
return 0;
}