diff options
Diffstat (limited to 'lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 6d2ff0e..5465e4a 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -2608,21 +2608,6 @@ Instruction *InstCombiner::visitFSub(BinaryOperator &I) { else if (Op1I->getOperand(1) == Op0) // X-(Y+X) == -Y return BinaryOperator::CreateFNeg(Op1I->getOperand(0), I.getName()); } - - if (Op1I->hasOneUse()) { - // Replace (x - (y - z)) with (x + (z - y)) if the (y - z) subexpression - // is not used by anyone else... - // - if (Op1I->getOpcode() == Instruction::FSub) { - // Swap the two operands of the subexpr... - Value *IIOp0 = Op1I->getOperand(0), *IIOp1 = Op1I->getOperand(1); - Op1I->setOperand(0, IIOp1); - Op1I->setOperand(1, IIOp0); - - // Create the new top level fadd instruction... - return BinaryOperator::CreateFAdd(Op0, Op1); - } - } } return 0; @@ -11824,7 +11809,8 @@ Instruction *InstCombiner::visitStoreInst(StoreInst &SI) { if (SI.isVolatile()) return 0; // Don't hack volatile stores. // store X, null -> turns into 'unreachable' in SimplifyCFG - if (isa<ConstantPointerNull>(Ptr)) { + if (isa<ConstantPointerNull>(Ptr) && + cast<PointerType>(Ptr->getType())->getAddressSpace() == 0) { if (!isa<UndefValue>(Val)) { SI.setOperand(0, UndefValue::get(Val->getType())); if (Instruction *U = dyn_cast<Instruction>(Val)) |
