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Use SimplifyICmpOperands in isKnownPredicate too.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102233 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-04-24 01:38:36 +00:00
parent d4da5af271
commit d19bba69ad
1 changed files with 3 additions and 0 deletions
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lib/Analysis/ScalarEvolution.cpp
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@ -4939,6 +4939,9 @@ bool ScalarEvolution::isKnownNonZero(const SCEV *S) {
bool ScalarEvolution::isKnownPredicate(ICmpInst::Predicate Pred,
const SCEV *LHS, const SCEV *RHS) {
// Canonicalize the inputs first.
(void)SimplifyICmpOperands(Pred, LHS, RHS);
// If LHS or RHS is an addrec, check to see if the condition is true in
// every iteration of the loop.
if (const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(LHS))