diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineSelect.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineSelect.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineSelect.cpp b/lib/Transforms/InstCombine/InstCombineSelect.cpp index 2a451ce5f1..aeb3c3e880 100644 --- a/lib/Transforms/InstCombine/InstCombineSelect.cpp +++ b/lib/Transforms/InstCombine/InstCombineSelect.cpp @@ -298,6 +298,16 @@ static Value *SimplifyWithOpReplaced(Value *V, Value *Op, Value *RepOp, return SimplifyBinOp(B->getOpcode(), B->getOperand(0), RepOp, TD); } + // Same for CmpInsts. + if (CmpInst *C = dyn_cast<CmpInst>(I)) { + if (C->getOperand(0) == Op) + return SimplifyCmpInst(C->getPredicate(), RepOp, C->getOperand(1), TD); + if (C->getOperand(1) == Op) + return SimplifyCmpInst(C->getPredicate(), C->getOperand(0), RepOp, TD); + } + + // TODO: We could hand off more cases to instsimplify here. + // If all operands are constant after substituting Op for RepOp then we can // constant fold the instruction. if (Constant *CRepOp = dyn_cast<Constant>(RepOp)) { |