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Fix ScalarEvolution::isLoopGuardedByCond to accept a null Loop*, for

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consistency with other routines that use a null Loop* to mean code
not contained by any loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72008 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-05-18 16:03:58 +00:00
parent 5183caebc1
commit 8ea94524ed
1 changed files with 4 additions and 0 deletions
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4
lib/Analysis/ScalarEvolution.cpp
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@ -3328,6 +3328,10 @@ ScalarEvolution::getPredecessorWithUniqueSuccessorForBB(BasicBlock *BB) {
bool ScalarEvolution::isLoopGuardedByCond(const Loop *L,
ICmpInst::Predicate Pred,
const SCEV *LHS, const SCEV *RHS) {
// Interpret a null as meaning no loop, where there is obviously no guard
// (interprocedural conditions notwithstanding).
if (!L) return false;
BasicBlock *Predecessor = getLoopPredecessor(L);
BasicBlock *PredecessorDest = L->getHeader();