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Use SCEVAddRecExpr::isAffine.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52614 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-06-22 19:23:09 +00:00
parent 09d3fdc254
commit 17f1972c77
2 changed files with 3 additions and 3 deletions
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4
lib/Analysis/ScalarEvolutionExpander.cpp
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@ -147,7 +147,7 @@ Value *SCEVExpander::visitAddRecExpr(SCEVAddRecExpr *S) {
}
// {0,+,1} --> Insert a canonical induction variable into the loop!
if (S->getNumOperands() == 2 &&
if (S->isAffine() &&
S->getOperand(1) == SE.getIntegerSCEV(1, Ty)) {
// Create and insert the PHI node for the induction variable in the
// specified loop.
@ -178,7 +178,7 @@ Value *SCEVExpander::visitAddRecExpr(SCEVAddRecExpr *S) {
Value *I = getOrInsertCanonicalInductionVariable(L, Ty);
// If this is a simple linear addrec, emit it now as a special case.
if (S->getNumOperands() == 2) { // {0,+,F} --> i*F
if (S->isAffine()) { // {0,+,F} --> i*F
Value *F = expand(S->getOperand(1));
// IF the step is by one, just return the inserted IV.