本文整理汇总了C++中MDefinition::hasDefUses方法的典型用法代码示例。如果您正苦于以下问题：C++ MDefinition::hasDefUses方法的具体用法？C++ MDefinition::hasDefUses怎么用？C++ MDefinition::hasDefUses使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MDefinition的用法示例。
在下文中一共展示了MDefinition::hasDefUses方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: IonSpew
//.........这里部分代码省略.........
}
while (count_ > 0) {
#ifdef DEBUG
if (!pessimisticPass_) {
size_t debugCount = 0;
IonSpew(IonSpew_GVN, "The following instructions require processing:");
for (ReversePostorderIterator block(graph_.rpoBegin()); block != graph_.rpoEnd(); block++) {
for (MDefinitionIterator iter(*block); iter; iter++) {
if (iter->isInWorklist()) {
IonSpew(IonSpew_GVN, "\t%d", iter->id());
debugCount++;
}
}
if (block->lastIns()->isInWorklist()) {
IonSpew(IonSpew_GVN, "\t%d", block->lastIns()->id());
debugCount++;
}
}
if (!debugCount)
IonSpew(IonSpew_GVN, "\tNone");
JS_ASSERT(debugCount == count_);
}
#endif
for (ReversePostorderIterator block(graph_.rpoBegin()); block != graph_.rpoEnd(); block++) {
if (mir->shouldCancel("Value Numbering (main loop)"))
return false;
for (MDefinitionIterator iter(*block); iter; ) {
if (!isMarked(*iter)) {
iter++;
continue;
}
JS_ASSERT_IF(!pessimisticPass_, count_ > 0);
unmarkDefinition(*iter);
MDefinition *ins = simplify(*iter, false);
if (ins != *iter) {
iter = block->discardDefAt(iter);
continue;
}
// Don't bother storing this instruction in the HashMap if
// (a) eliminateRedundancies will never eliminate it (because
// it's non-movable or effectful) and (b) no other instruction's
// value number depends on it.
if (!ins->hasDefUses() && (!ins->isMovable() || ins->isEffectful())) {
iter++;
continue;
}
uint32_t value = lookupValue(ins);
if (!value)
return false; // Hashtable insertion failed
if (ins->valueNumber() != value) {
IonSpew(IonSpew_GVN,
"Broke congruence for instruction %d (%p) with VN %d (now using %d)",
ins->id(), (void *) ins, ins->valueNumber(), value);
ins->setValueNumber(value);
markConsumers(ins);
}
iter++;
}
// Process control flow instruction:
MControlInstruction *jump = block->lastIns();
jump = simplifyControlInstruction(jump);
// If we are pessimistic, then this will never get set.
if (!jump->isInWorklist())
continue;
unmarkDefinition(jump);
if (jump->valueNumber() == 0) {
jump->setValueNumber(jump->id());
for (size_t i = 0; i < jump->numSuccessors(); i++)
markBlock(jump->getSuccessor(i));
}
}
// If we are doing a pessimistic pass, we only go once through the
// instruction list.
if (pessimisticPass_)
break;
}
#ifdef DEBUG
for (ReversePostorderIterator block(graph_.rpoBegin()); block != graph_.rpoEnd(); block++) {
for (MDefinitionIterator iter(*block); iter; iter++) {
JS_ASSERT(!iter->isInWorklist());
JS_ASSERT_IF(iter->valueNumber() == 0,
!iter->hasDefUses() && (!iter->isMovable() || iter->isEffectful()));
}
}
#endif
return true;
}