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Can simplify code now with the isCommutative() method. 

llvm-svn: 4461
This commit is contained in:
Chris Lattner 2002-10-31 04:24:23 +00:00
parent d1998c4aea
commit f6cfaedcff
1 changed files with 5 additions and 13 deletions
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18
llvm/lib/VMCore/iOperators.cpp
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@ -133,21 +133,13 @@ const Value *BinaryOperator::getNotArgument(const BinaryOperator *Bop) {
// order dependant (SetLT f.e.) the opcode is changed.
//
bool BinaryOperator::swapOperands() {
if (SetCondInst *SCI = dyn_cast<SetCondInst>(this)) {
if (isCommutative())
; // If the instruction is commutative, it is safe to swap the operands
else if (SetCondInst *SCI = dyn_cast<SetCondInst>(this))
iType = SCI->getSwappedCondition();
std::swap(Operands[0], Operands[1]);
return false;
}
else
return true; // Can't commute operands
switch (getOpcode()) {
// Instructions that don't need opcode modification
case Add: case Mul:
case And: case Xor:
case Or:
// Error on the side of caution
default:
return true;
}
std::swap(Operands[0], Operands[1]);
return false;
}