本文整理汇总了C++中AArch64FunctionInfo::setVarArgsStackIndex方法的典型用法代码示例。如果您正苦于以下问题：C++ AArch64FunctionInfo::setVarArgsStackIndex方法的具体用法？C++ AArch64FunctionInfo::setVarArgsStackIndex怎么用？C++ AArch64FunctionInfo::setVarArgsStackIndex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AArch64FunctionInfo的用法示例。
在下文中一共展示了AArch64FunctionInfo::setVarArgsStackIndex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: Handler
bool AArch64CallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
const Function &F,
ArrayRef<unsigned> VRegs) const {
MachineFunction &MF = MIRBuilder.getMF();
MachineBasicBlock &MBB = MIRBuilder.getMBB();
MachineRegisterInfo &MRI = MF.getRegInfo();
auto &DL = F.getParent()->getDataLayout();
SmallVector<ArgInfo, 8> SplitArgs;
unsigned i = 0;
for (auto &Arg : F.args()) {
if (DL.getTypeStoreSize(Arg.getType()) == 0)
continue;
ArgInfo OrigArg{VRegs[i], Arg.getType()};
setArgFlags(OrigArg, i + AttributeList::FirstArgIndex, DL, F);
bool Split = false;
LLT Ty = MRI.getType(VRegs[i]);
unsigned Dst = VRegs[i];
splitToValueTypes(OrigArg, SplitArgs, DL, MRI, F.getCallingConv(),
[&](unsigned Reg, uint64_t Offset) {
if (!Split) {
Split = true;
Dst = MRI.createGenericVirtualRegister(Ty);
MIRBuilder.buildUndef(Dst);
}
unsigned Tmp = MRI.createGenericVirtualRegister(Ty);
MIRBuilder.buildInsert(Tmp, Dst, Reg, Offset);
Dst = Tmp;
});
if (Dst != VRegs[i])
MIRBuilder.buildCopy(VRegs[i], Dst);
++i;
}
if (!MBB.empty())
MIRBuilder.setInstr(*MBB.begin());
const AArch64TargetLowering &TLI = *getTLI<AArch64TargetLowering>();
CCAssignFn *AssignFn =
TLI.CCAssignFnForCall(F.getCallingConv(), /*IsVarArg=*/false);
FormalArgHandler Handler(MIRBuilder, MRI, AssignFn);
if (!handleAssignments(MIRBuilder, SplitArgs, Handler))
return false;
if (F.isVarArg()) {
if (!MF.getSubtarget<AArch64Subtarget>().isTargetDarwin()) {
// FIXME: we need to reimplement saveVarArgsRegisters from
// AArch64ISelLowering.
return false;
}
// We currently pass all varargs at 8-byte alignment.
uint64_t StackOffset = alignTo(Handler.StackUsed, 8);
auto &MFI = MIRBuilder.getMF().getFrameInfo();
AArch64FunctionInfo *FuncInfo = MF.getInfo<AArch64FunctionInfo>();
FuncInfo->setVarArgsStackIndex(MFI.CreateFixedObject(4, StackOffset, true));
}
auto &Subtarget = MF.getSubtarget<AArch64Subtarget>();
if (Subtarget.hasCustomCallingConv())
Subtarget.getRegisterInfo()->UpdateCustomCalleeSavedRegs(MF);
// Move back to the end of the basic block.
MIRBuilder.setMBB(MBB);
return true;
}