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| author | rdivacky <rdivacky@FreeBSD.org> | 2009-11-04 14:58:56 +0000 |
|---|---|---|
| committer | rdivacky <rdivacky@FreeBSD.org> | 2009-11-04 14:58:56 +0000 |
| commit | 7ff99155c39edd73ebf1c6adfa023b1048fee9a4 (patch) | |
| tree | b4dc751bcee540346911aa4115729eff2f991657 /lib/Transforms/Scalar/LoopStrengthReduce.cpp | |
| parent | d1f06de484602e72707476a6152974847bac1570 (diff) | |
| download | FreeBSD-src-7ff99155c39edd73ebf1c6adfa023b1048fee9a4.zip FreeBSD-src-7ff99155c39edd73ebf1c6adfa023b1048fee9a4.tar.gz | |
Update LLVM to r86025.
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index d8f6cc1..e20fb16 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -1914,7 +1914,7 @@ ICmpInst *LoopStrengthReduce::ChangeCompareStride(Loop *L, ICmpInst *Cond, continue; // Watch out for overflow. - if (ICmpInst::isSignedPredicate(Predicate) && + if (ICmpInst::isSigned(Predicate) && (CmpVal & SignBit) != (NewCmpVal & SignBit)) continue; @@ -1956,7 +1956,7 @@ ICmpInst *LoopStrengthReduce::ChangeCompareStride(Loop *L, ICmpInst *Cond, // Check if it is possible to rewrite it using // an iv / stride of a smaller integer type. unsigned Bits = NewTyBits; - if (ICmpInst::isSignedPredicate(Predicate)) + if (ICmpInst::isSigned(Predicate)) --Bits; uint64_t Mask = (1ULL << Bits) - 1; if (((uint64_t)NewCmpVal & Mask) != (uint64_t)NewCmpVal) @@ -2262,6 +2262,10 @@ void LoopStrengthReduce::OptimizeShadowIV(Loop *L) { if (!C) continue; + // Ignore negative constants, as the code below doesn't handle them + // correctly. TODO: Remove this restriction. + if (!C->getValue().isStrictlyPositive()) continue; + /* Add new PHINode. */ PHINode *NewPH = PHINode::Create(DestTy, "IV.S.", PH); |
