本文整理汇总了C++中MInstructionReverseIterator::hasUses方法的典型用法代码示例。如果您正苦于以下问题：C++ MInstructionReverseIterator::hasUses方法的具体用法？C++ MInstructionReverseIterator::hasUses怎么用？C++ MInstructionReverseIterator::hasUses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MInstructionReverseIterator的用法示例。
在下文中一共展示了MInstructionReverseIterator::hasUses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:
// Instructions are useless if they are unused and have no side effects.
// This pass eliminates useless instructions.
// The graph itself is unchanged.
bool
ion::EliminateDeadCode(MIRGenerator *mir, MIRGraph &graph)
{
// Traverse in postorder so that we hit uses before definitions.
// Traverse instruction list backwards for the same reason.
for (PostorderIterator block = graph.poBegin(); block != graph.poEnd(); block++) {
if (mir->shouldCancel("Eliminate Dead Code (main loop)"))
return false;
// Remove unused instructions.
for (MInstructionReverseIterator inst = block->rbegin(); inst != block->rend(); ) {
if (!inst->isEffectful() && !inst->hasUses() && !inst->isGuard() &&
!inst->isControlInstruction()) {
inst = block->discardAt(inst);
} else {
inst++;
}
}
}
return true;
}