diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstructionCombining.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstructionCombining.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp index 60db2ddb63c..2271e219d0f 100644 --- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp +++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp @@ -731,6 +731,7 @@ Value *InstCombiner::SimplifySelectsFeedingBinaryOp(BinaryOperator &I, Value *SI = nullptr; if (match(LHS, m_Select(m_Value(A), m_Value(B), m_Value(C))) && match(RHS, m_Select(m_Specific(A), m_Value(D), m_Value(E)))) { + bool SelectsHaveOneUse = LHS->hasOneUse() && RHS->hasOneUse(); BuilderTy::FastMathFlagGuard Guard(Builder); if (isa<FPMathOperator>(&I)) Builder.setFastMathFlags(I.getFastMathFlags()); @@ -739,9 +740,9 @@ Value *InstCombiner::SimplifySelectsFeedingBinaryOp(BinaryOperator &I, Value *V2 = SimplifyBinOp(Opcode, B, D, SQ.getWithInstruction(&I)); if (V1 && V2) SI = Builder.CreateSelect(A, V2, V1); - else if (V2) + else if (V2 && SelectsHaveOneUse) SI = Builder.CreateSelect(A, V2, Builder.CreateBinOp(Opcode, C, E)); - else if (V1) + else if (V1 && SelectsHaveOneUse) SI = Builder.CreateSelect(A, Builder.CreateBinOp(Opcode, B, D), V1); if (SI) |
