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Add an assertion.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29199 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2006-07-19 05:48:45 +00:00
parent 2698a08c23
commit 10d9d9f27c
1 changed files with 2 additions and 0 deletions
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2
lib/Transforms/Scalar/LoopUnroll.cpp
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@ -272,6 +272,8 @@ bool LoopUnroll::visitLoop(Loop *L) {
// Remove LCSSA Phis from the exit block
for (BasicBlock::iterator ExitInstr = LoopExit->begin();
PHINode* PN = dyn_cast<PHINode>(ExitInstr); ++ExitInstr) {
assert(PN->getNumIncomingValues() == 1
&& "Block should only have one pred, so Phi's must be LCSSA");
PN->replaceAllUsesWith(PN->getOperand(0));
PN->eraseFromParent();
}