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Diffstat (limited to 'lib/Transforms/Scalar/Reassociate.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/Reassociate.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/Reassociate.cpp b/lib/Transforms/Scalar/Reassociate.cpp index 3cc380a0e4..4a99f4a844 100644 --- a/lib/Transforms/Scalar/Reassociate.cpp +++ b/lib/Transforms/Scalar/Reassociate.cpp @@ -792,6 +792,11 @@ Value *Reassociate::OptimizeAdd(Instruction *I, Instruction *DummyInst = BinaryOperator::CreateAdd(MaxOccVal, MaxOccVal); SmallVector<Value*, 4> NewMulOps; for (unsigned i = 0, e = Ops.size(); i != e; ++i) { + // Only try to remove factors from expressions we're allowed to. + BinaryOperator *BOp = dyn_cast<BinaryOperator>(Ops[i].Op); + if (BOp == 0 || BOp->getOpcode() != Instruction::Mul || !BOp->use_empty()) + continue; + if (Value *V = RemoveFactorFromExpression(Ops[i].Op, MaxOccVal)) { NewMulOps.push_back(V); Ops.erase(Ops.begin()+i); |