本文整理汇总了C++中MInstruction::isConstantElements方法的典型用法代码示例。如果您正苦于以下问题：C++ MInstruction::isConstantElements方法的具体用法？C++ MInstruction::isConstantElements怎么用？C++ MInstruction::isConstantElements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MInstruction的用法示例。
在下文中一共展示了MInstruction::isConstantElements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:
bool
Loop::hoistInstructions(InstructionQueue &toHoist)
{
// Iterate in post-order (uses before definitions)
for (int32_t i = toHoist.length() - 1; i >= 0; i--) {
MInstruction *ins = toHoist[i];
// Don't hoist MConstantElements, MConstant and MBox
// if it doesn't enable us to hoist one of its uses.
// We want those instructions as close as possible to their use.
if (ins->isConstantElements() || ins->isConstant() || ins->isBox()) {
bool loopInvariantUse = false;
for (MUseDefIterator use(ins); use; use++) {
if (use.def()->isLoopInvariant()) {
loopInvariantUse = true;
break;
}
}
if (!loopInvariantUse)
ins->setNotLoopInvariant();
}
}
// Move all instructions to the preLoop_ block just before the control instruction.
for (size_t i = 0; i < toHoist.length(); i++) {
MInstruction *ins = toHoist[i];
// Loads may have an implicit dependency on either stores (effectful instructions) or
// control instructions so we should never move these.
JS_ASSERT(!ins->isControlInstruction());
JS_ASSERT(!ins->isEffectful());
JS_ASSERT(ins->isMovable());
if (!ins->isLoopInvariant())
continue;
if (checkHotness(ins->block())) {
ins->block()->moveBefore(preLoop_->lastIns(), ins);
ins->setNotLoopInvariant();
}
}
return true;
}