本文整理汇总了C++中LAllocation::toGeneralReg方法的典型用法代码示例。如果您正苦于以下问题：C++ LAllocation::toGeneralReg方法的具体用法？C++ LAllocation::toGeneralReg怎么用？C++ LAllocation::toGeneralReg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LAllocation的用法示例。
在下文中一共展示了LAllocation::toGeneralReg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: getVirtualRegister
bool
GreedyAllocator::allocateDefinition(LInstruction *ins, LDefinition *def)
{
VirtualRegister *vr = getVirtualRegister(def);
LAllocation output;
switch (def->policy()) {
case LDefinition::PASSTHROUGH:
// This is purely passthru, so ignore it.
return true;
case LDefinition::DEFAULT:
case LDefinition::MUST_REUSE_INPUT:
{
AnyRegister reg;
// Either take the register requested, or allocate a new one.
if (def->policy() == LDefinition::MUST_REUSE_INPUT &&
ins->getOperand(def->getReusedInput())->toUse()->isFixedRegister())
{
LAllocation *a = ins->getOperand(def->getReusedInput());
VirtualRegister *vuse = getVirtualRegister(a->toUse());
reg = GetFixedRegister(vuse->def, a->toUse());
} else if (vr->hasRegister()) {
reg = vr->reg();
} else {
if (!allocate(vr->type(), DISALLOW, ®))
return false;
}
if (def->policy() == LDefinition::MUST_REUSE_INPUT) {
LUse *use = ins->getOperand(def->getReusedInput())->toUse();
VirtualRegister *vuse = getVirtualRegister(use);
// If the use already has the given register, we need to evict.
if (vuse->hasRegister() && vuse->reg() == reg) {
if (!evict(reg))
return false;
}
// Make sure our input is using a fixed register.
if (reg.isFloat())
*use = LUse(reg.fpu(), use->virtualRegister());
else
*use = LUse(reg.gpr(), use->virtualRegister());
}
output = LAllocation(reg);
break;
}
case LDefinition::PRESET:
{
// Eviction and disallowing occurred during the definition
// pre-scan pass.
output = *def->output();
break;
}
}
if (output.isRegister()) {
JS_ASSERT_IF(output.isFloatReg(), disallowed.has(output.toFloatReg()->reg()));
JS_ASSERT_IF(output.isGeneralReg(), disallowed.has(output.toGeneralReg()->reg()));
}
// Finally, set the output.
def->setOutput(output);
return true;
}