diff options
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCasts.cpp | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp index 601d9b42f3..48a747d764 100644 --- a/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp @@ -29,6 +29,10 @@ static Value *DecomposeSimpleLinearExpr(Value *Val, unsigned &Scale, return ConstantInt::get(Val->getType(), 0); } + // Insist that the amount-to-allocate not overflow. + OverflowingBinaryOperator *OBI = dyn_cast<OverflowingBinaryOperator>(Val); + if (OBI && !OBI->hasNoUnsignedWrap()) return 0; + if (BinaryOperator *I = dyn_cast<BinaryOperator>(Val)) { if (ConstantInt *RHS = dyn_cast<ConstantInt>(I->getOperand(1))) { if (I->getOpcode() == Instruction::Shl) { @@ -71,11 +75,6 @@ Instruction *InstCombiner::PromoteCastOfAllocation(BitCastInst &CI, // This requires TargetData to get the alloca alignment and size information. if (!TD) return 0; - // Insist that the amount-to-allocate not overflow. - OverflowingBinaryOperator *OBI = - dyn_cast<OverflowingBinaryOperator>(AI.getOperand(0)); - if (OBI && !(OBI->hasNoSignedWrap() || OBI->hasNoUnsignedWrap())) return 0; - const PointerType *PTy = cast<PointerType>(CI.getType()); BuilderTy AllocaBuilder(*Builder); |