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//===-- iOperators.cpp - Implement the Binary & Unary Operators --*- C++ -*--=//
//
// This file implements the nontrivial binary & unary operator instructions.
//
//===----------------------------------------------------------------------===//
#include "llvm/iOperators.h"
#include "llvm/Type.h"
#include <iostream>
using std::cerr;
//===----------------------------------------------------------------------===//
// UnaryOperator Class
//===----------------------------------------------------------------------===//
UnaryOperator *UnaryOperator::create(UnaryOps Op, Value *Source) {
switch (Op) {
case Not: return new GenericUnaryInst(Op, Source);
default:
cerr << "Don't know how to Create UnaryOperator " << Op << "\n";
return 0;
}
}
//===----------------------------------------------------------------------===//
// GenericUnaryOperator Class
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// BinaryOperator Class
//===----------------------------------------------------------------------===//
BinaryOperator *BinaryOperator::create(BinaryOps Op, Value *S1, Value *S2,
const std::string &Name) {
switch (Op) {
// Binary comparison operators...
case SetLT: case SetGT: case SetLE:
case SetGE: case SetEQ: case SetNE:
return new SetCondInst(Op, S1, S2, Name);
default:
return new GenericBinaryInst(Op, S1, S2, Name);
}
}
// 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 dependant (SetLT f.e.) the opcode is changed.
//
bool BinaryOperator::swapOperands() {
switch (getOpcode()) {
// Instructions that don't need opcode modification
case Add: case Mul:
case And: case Xor:
case Or:
case SetEQ: case SetNE:
break;
// Instructions that need opcode modification
case SetGT: iType = SetLT; break;
case SetLT: iType = SetGT; break;
case SetGE: iType = SetLE; break;
case SetLE: iType = SetGE; break;
// Error on the side of caution
default:
return true;
}
std::swap(Operands[0], Operands[1]);
return false;
}
//===----------------------------------------------------------------------===//
// GenericBinaryInst Class
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// SetCondInst Class
//===----------------------------------------------------------------------===//
SetCondInst::SetCondInst(BinaryOps opType, Value *S1, Value *S2,
const std::string &Name)
: BinaryOperator(opType, S1, S2, Name) {
OpType = opType;
setType(Type::BoolTy); // setcc instructions always return bool type.
// Make sure it's a valid type...
assert(getOpcodeName() != 0);
}
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