本文整理汇总了C++中SparcMachineFunctionInfo::getSRetReturnReg方法的典型用法代码示例。如果您正苦于以下问题：C++ SparcMachineFunctionInfo::getSRetReturnReg方法的具体用法？C++ SparcMachineFunctionInfo::getSRetReturnReg怎么用？C++ SparcMachineFunctionInfo::getSRetReturnReg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SparcMachineFunctionInfo的用法示例。
在下文中一共展示了SparcMachineFunctionInfo::getSRetReturnReg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: CCInfo
SDValue
SparcTargetLowering::LowerReturn(SDValue Chain,
CallingConv::ID CallConv, bool isVarArg,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
DebugLoc dl, SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
// CCValAssign - represent the assignment of the return value to locations.
SmallVector<CCValAssign, 16> RVLocs;
// CCState - Info about the registers and stack slot.
CCState CCInfo(CallConv, isVarArg, DAG.getTarget(),
RVLocs, *DAG.getContext());
// Analize return values.
CCInfo.AnalyzeReturn(Outs, RetCC_Sparc32);
// If this is the first return lowered for this function, add the regs to the
// liveout set for the function.
if (MF.getRegInfo().liveout_empty()) {
for (unsigned i = 0; i != RVLocs.size(); ++i)
if (RVLocs[i].isRegLoc())
MF.getRegInfo().addLiveOut(RVLocs[i].getLocReg());
}
SDValue Flag;
// Copy the result values into the output registers.
for (unsigned i = 0; i != RVLocs.size(); ++i) {
CCValAssign &VA = RVLocs[i];
assert(VA.isRegLoc() && "Can only return in registers!");
Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
OutVals[i], Flag);
// Guarantee that all emitted copies are stuck together with flags.
Flag = Chain.getValue(1);
}
unsigned RetAddrOffset = 8; //Call Inst + Delay Slot
// If the function returns a struct, copy the SRetReturnReg to I0
if (MF.getFunction()->hasStructRetAttr()) {
SparcMachineFunctionInfo *SFI = MF.getInfo<SparcMachineFunctionInfo>();
unsigned Reg = SFI->getSRetReturnReg();
if (!Reg)
llvm_unreachable("sret virtual register not created in the entry block");
SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
Chain = DAG.getCopyToReg(Chain, dl, SP::I0, Val, Flag);
Flag = Chain.getValue(1);
if (MF.getRegInfo().liveout_empty())
MF.getRegInfo().addLiveOut(SP::I0);
RetAddrOffset = 12; // CallInst + Delay Slot + Unimp
}
SDValue RetAddrOffsetNode = DAG.getConstant(RetAddrOffset, MVT::i32);
if (Flag.getNode())
return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain,
RetAddrOffsetNode, Flag);
return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain,
RetAddrOffsetNode);
}