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[SCEV] Break out of loop if there is no more work to do

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This is NFC as far as externally visible behavior is concerned, but will
keep us from spinning in the worklist traversal algorithm unnecessarily.

llvm-svn: 272182
This commit is contained in:
Sanjoy Das 2016-06-08 17:48:46 +00:00
parent c35e5710c9
commit 4009301768
1 changed files with 1 additions and 1 deletions
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2
lib/Analysis/ScalarEvolution.cpp
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@ -4889,7 +4889,7 @@ bool ScalarEvolution::isAddRecNeverPoison(const Instruction *I, const Loop *L) {
PoisonStack.push_back(I);
bool LatchControlDependentOnPoison = false;
while (!PoisonStack.empty()) {
while (!PoisonStack.empty() && !LatchControlDependentOnPoison) {
const Instruction *Poison = PoisonStack.pop_back_val();
for (auto *PoisonUser : Poison->users()) {