diff options
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp index 95f266a3d5f..059afa1314a 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp @@ -1078,11 +1078,6 @@ Instruction *InstCombiner::visitAdd(BinaryOperator &I) { // FIXME: Use the match above instead of dyn_cast to allow these transforms // for splat vectors. if (ConstantInt *CI = dyn_cast<ConstantInt>(RHS)) { - // See if SimplifyDemandedBits can simplify this. This handles stuff like - // (X & 254)+1 -> (X&254)|1 - if (SimplifyDemandedInstructionBits(I)) - return &I; - // zext(bool) + C -> bool ? C + 1 : C if (ZExtInst *ZI = dyn_cast<ZExtInst>(LHS)) if (ZI->getSrcTy()->isIntegerTy(1)) @@ -1589,9 +1584,6 @@ Instruction *InstCombiner::visitSub(BinaryOperator &I) { if (match(Op1, m_Add(m_Value(X), m_Constant(C2)))) return BinaryOperator::CreateSub(ConstantExpr::getSub(C, C2), X); - if (SimplifyDemandedInstructionBits(I)) - return &I; - // Fold (sub 0, (zext bool to B)) --> (sext bool to B) if (C->isNullValue() && match(Op1, m_ZExt(m_Value(X)))) if (X->getType()->getScalarType()->isIntegerTy(1)) |
