diff options
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index c2ae4cc637..1433f7bbc9 100644 --- a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/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()) |