// Volatile memory operands are not allowed in long subtractions
// if we are compiling for an SMP machine, as the carry flag can
// get clobbered by the memory barrier immediately preceding the
// SBB4RegMem instruction.
//
static bool isVolatileMemoryOperand(TR::Node *node)
{
if (TR::Compiler->target.isSMP() && node->getOpCode().isMemoryReference())
{
TR_ASSERT(node->getSymbolReference(), "expecting a symbol reference\n");
TR::Symbol *sym = node->getSymbolReference()->getSymbol();
return (sym && sym->isVolatile());
}
return false;
}
bool
OMR::SymbolReference::storeCanBeRemoved()
{
TR::Compilation *comp = TR::comp();
TR::Symbol * s = self()->getSymbol();
return !s->isVolatile() &&
(((s->getDataType() != TR::Double) && (s->getDataType() != TR::Float)) ||
comp->cg()->getSupportsJavaFloatSemantics() ||
(self()->isTemporary(comp) && !s->behaveLikeNonTemp()));
}