diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index 0d6df2fbae..641f9b0e5c 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -2351,13 +2351,13 @@ ICmpInst *LoopStrengthReduce::OptimizeSMax(Loop *L, ICmpInst *Cond, SelectInst *Sel = dyn_cast<SelectInst>(Cond->getOperand(1)); if (!Sel || !Sel->hasOneUse()) return Cond; - SCEVHandle IterationCount = SE->getIterationCount(L); - if (isa<SCEVCouldNotCompute>(IterationCount)) + SCEVHandle BackedgeTakenCount = SE->getBackedgeTakenCount(L); + if (isa<SCEVCouldNotCompute>(BackedgeTakenCount)) return Cond; - SCEVHandle One = SE->getIntegerSCEV(1, IterationCount->getType()); + SCEVHandle One = SE->getIntegerSCEV(1, BackedgeTakenCount->getType()); - // Adjust for an annoying getIterationCount quirk. - IterationCount = SE->getAddExpr(IterationCount, One); + // Add one to the backedge-taken count to get the trip count. + SCEVHandle IterationCount = SE->getAddExpr(BackedgeTakenCount, One); // Check for a max calculation that matches the pattern. SCEVSMaxExpr *SMax = dyn_cast<SCEVSMaxExpr>(IterationCount); @@ -2412,8 +2412,8 @@ ICmpInst *LoopStrengthReduce::OptimizeSMax(Loop *L, ICmpInst *Cond, /// inside the loop then try to eliminate the cast opeation. void LoopStrengthReduce::OptimizeShadowIV(Loop *L) { - SCEVHandle IterationCount = SE->getIterationCount(L); - if (isa<SCEVCouldNotCompute>(IterationCount)) + SCEVHandle BackedgeTakenCount = SE->getBackedgeTakenCount(L); + if (isa<SCEVCouldNotCompute>(BackedgeTakenCount)) return; for (unsigned Stride = 0, e = StrideOrder.size(); Stride != e; |