diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineAddSub.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineAddSub.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/lib/Transforms/InstCombine/InstCombineAddSub.cpp index c88ceede1f..00f9974125 100644 --- a/lib/Transforms/InstCombine/InstCombineAddSub.cpp +++ b/lib/Transforms/InstCombine/InstCombineAddSub.cpp @@ -170,10 +170,11 @@ Instruction *InstCombiner::visitAdd(BinaryOperator &I) { // -A + B --> B - A // -A + -B --> -(A + B) if (Value *LHSV = dyn_castNegVal(LHS)) { - if (Value *RHSV = dyn_castNegVal(RHS)) { - Value *NewAdd = Builder->CreateAdd(LHSV, RHSV, "sum"); - return BinaryOperator::CreateNeg(NewAdd); - } + if (!isa<Constant>(RHS)) + if (Value *RHSV = dyn_castNegVal(RHS)) { + Value *NewAdd = Builder->CreateAdd(LHSV, RHSV, "sum"); + return BinaryOperator::CreateNeg(NewAdd); + } return BinaryOperator::CreateSub(RHS, LHSV); } |