diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineAddSub.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineAddSub.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/lib/Transforms/InstCombine/InstCombineAddSub.cpp index c22249527b..47223c3b35 100644 --- a/lib/Transforms/InstCombine/InstCombineAddSub.cpp +++ b/lib/Transforms/InstCombine/InstCombineAddSub.cpp @@ -354,6 +354,10 @@ Instruction *InstCombiner::visitFAdd(BinaryOperator &I) { if (Value *V = SimplifyFAddInst(LHS, RHS, I.getFastMathFlags(), TD)) return ReplaceInstUsesWith(I, V); + if (isa<Constant>(RHS) && isa<PHINode>(LHS)) + if (Instruction *NV = FoldOpIntoPhi(I)) + return NV; + // -A + B --> B - A // -A + -B --> -(A + B) if (Value *LHSV = dyn_castFNegVal(LHS)) |