+BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
+ BasicBlock *InsertAtEnd) {
+ if (!Op->getType()->isFloatingPoint())
+ return new BinaryOperator(Instruction::Sub,
+ Constant::getNullValue(Op->getType()), Op,
+ Op->getType(), Name, InsertAtEnd);
+ else
+ return new BinaryOperator(Instruction::Sub,
+ ConstantFP::get(Op->getType(), -0.0), Op,
+ Op->getType(), Name, InsertAtEnd);
+}
+
+BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
+ Instruction *InsertBefore) {
+ return new BinaryOperator(Instruction::Xor, Op,
+ ConstantIntegral::getAllOnesValue(Op->getType()),
+ Op->getType(), Name, InsertBefore);
+}
+
+BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
+ BasicBlock *InsertAtEnd) {
+ return new BinaryOperator(Instruction::Xor, Op,
+ ConstantIntegral::getAllOnesValue(Op->getType()),
+ Op->getType(), Name, InsertAtEnd);
+}
+
+
+// isConstantAllOnes - Helper function for several functions below
+static inline bool isConstantAllOnes(const Value *V) {
+ return isa<ConstantIntegral>(V) &&cast<ConstantIntegral>(V)->isAllOnesValue();
+}
+
+bool BinaryOperator::isNeg(const Value *V) {
+ if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
+ if (Bop->getOpcode() == Instruction::Sub)
+ if (!V->getType()->isFloatingPoint())
+ return Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
+ else
+ return Bop->getOperand(0) == ConstantFP::get(Bop->getType(), -0.0);
+ return false;
+}
+
+bool BinaryOperator::isNot(const Value *V) {
+ if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
+ return (Bop->getOpcode() == Instruction::Xor &&
+ (isConstantAllOnes(Bop->getOperand(1)) ||
+ isConstantAllOnes(Bop->getOperand(0))));
+ return false;
+}
+
+Value *BinaryOperator::getNegArgument(BinaryOperator *Bop) {
+ assert(isNeg(Bop) && "getNegArgument from non-'neg' instruction!");
+ return Bop->getOperand(1);
+}
+
+const Value *BinaryOperator::getNegArgument(const BinaryOperator *Bop) {
+ return getNegArgument((BinaryOperator*)Bop);
+}
+
+Value *BinaryOperator::getNotArgument(BinaryOperator *Bop) {
+ assert(isNot(Bop) && "getNotArgument on non-'not' instruction!");
+ Value *Op0 = Bop->getOperand(0);
+ Value *Op1 = Bop->getOperand(1);
+ if (isConstantAllOnes(Op0)) return Op1;
+
+ assert(isConstantAllOnes(Op1));
+ return Op0;
+}
+
+const Value *BinaryOperator::getNotArgument(const BinaryOperator *Bop) {
+ return getNotArgument((BinaryOperator*)Bop);
+}
+
+
+// swapOperands - Exchange the two operands to this instruction. This
+// instruction is safe to use on any binary instruction and does not
+// modify the semantics of the instruction. If the instruction is
+// order dependent (SetLT f.e.) the opcode is changed.
+//
+bool BinaryOperator::swapOperands() {
+ if (isCommutative())
+ ; // If the instruction is commutative, it is safe to swap the operands
+ else if (SetCondInst *SCI = dyn_cast<SetCondInst>(this))
+ /// FIXME: SetCC instructions shouldn't all have different opcodes.
+ setOpcode(SCI->getSwappedCondition());
+ else
+ return true; // Can't commute operands
+
+ std::swap(Operands[0], Operands[1]);
+ return false;
+}
+
+