diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index 85fd2c3bdb7..e90d1909ae4 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -7326,6 +7326,13 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) { return BinaryOperator::createOr(NotCond, TrueVal); } } + + // select a, b, a -> a&b + // select a, a, b -> a|b + if (CondVal == TrueVal) + return BinaryOperator::createOr(CondVal, FalseVal); + else if (CondVal == FalseVal) + return BinaryOperator::createAnd(CondVal, TrueVal); } // Selecting between two integer constants? |
