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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2010-11-17 19:11:46 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2010-11-17 19:11:46 +0000 |
| commit | 07726c7d526788c92099a2fffedd88eb15aae28e (patch) | |
| tree | 150434bda9a33565d95f56dce992a9785b030d98 /llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | |
| parent | b94e5a33b372eaa88361576722b605e4f8c5d07a (diff) | |
| download | bcm5719-llvm-07726c7d526788c92099a2fffedd88eb15aae28e.tar.gz bcm5719-llvm-07726c7d526788c92099a2fffedd88eb15aae28e.zip | |
InstCombine: Add a missing irem identity (X % X -> 0).
llvm-svn: 119538
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index c2ae4cc6371..1433f7bbc94 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -551,6 +551,10 @@ Instruction *InstCombiner::commonIRemTransforms(BinaryOperator &I) { if (Instruction *common = commonRemTransforms(I)) return common; + // X % X == 0 + if (Op0 == Op1) + return ReplaceInstUsesWith(I, Constant::getNullValue(I.getType())); + // 0 % X == 0 for integer, we don't need to preserve faults! if (Constant *LHS = dyn_cast<Constant>(Op0)) if (LHS->isNullValue()) |
