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| author | Eli Friedman <eli.friedman@gmail.com> | 2012-05-11 01:32:59 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2012-05-11 01:32:59 +0000 |
| commit | 5b6dfee28e86529030cabdc356e00b4d70747d65 (patch) | |
| tree | 6946c19624d16d7a8a9e18a90c525a303f89c726 /lib | |
| parent | 247c5ab07c1c136f37f5ad8ade9a1ee086ca452e (diff) | |
| download | external_llvm-5b6dfee28e86529030cabdc356e00b4d70747d65.zip external_llvm-5b6dfee28e86529030cabdc356e00b4d70747d65.tar.gz external_llvm-5b6dfee28e86529030cabdc356e00b4d70747d65.tar.bz2 | |
Fix a minor logic mistake transforming compares in instcombine. PR12514.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156600 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCompares.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp index ab2987f..7bbdd45 100644 --- a/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -1035,7 +1035,7 @@ Instruction *InstCombiner::visitICmpInstWithInstAndIntCst(ICmpInst &ICI, if ((KnownZero|KnownOne).countLeadingOnes() >= SrcBits-DstBits) { // Pull in the high bits from known-ones set. APInt NewRHS = RHS->getValue().zext(SrcBits); - NewRHS |= KnownOne; + NewRHS |= KnownOne & APInt::getHighBitsSet(SrcBits, SrcBits-DstBits); return new ICmpInst(ICI.getPredicate(), LHSI->getOperand(0), ConstantInt::get(ICI.getContext(), NewRHS)); } |