[llvm-commits] [llvm] r166841 - in /llvm/trunk/lib/Target/Mips: MipsISelLowering.cpp MipsISelLowering.h
Akira Hatanaka
ahatanaka at mips.com
Fri Oct 26 17:10:18 PDT 2012
Author: ahatanak
Date: Fri Oct 26 19:10:18 2012
New Revision: 166841
URL: http://llvm.org/viewvc/llvm-project?rev=166841&view=rev
Log:
Add method MipsTargetLowering::copyByValRegs.
This method copies byval arguments passed in registers onto the stack and has
the same functionality as existing functions CopyMips64ByValRegs and
ReadByValArg which will be deleted later.
Modified:
llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
llvm/trunk/lib/Target/Mips/MipsISelLowering.h
Modified: llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp?rev=166841&r1=166840&r2=166841&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp Fri Oct 26 19:10:18 2012
@@ -3936,3 +3936,46 @@
ByValSize -= RegSize, ++I, ++ByVal.NumRegs)
CCInfo.AllocateReg(IntArgRegs[I], ShadowRegs[I]);
}
+
+void MipsTargetLowering::
+copyByValRegs(SDValue Chain, DebugLoc DL, std::vector<SDValue> &OutChains,
+ SelectionDAG &DAG, const ISD::ArgFlagsTy &Flags,
+ SmallVectorImpl<SDValue> &InVals, const Argument *FuncArg,
+ const MipsCC &CC, const ByValArgInfo &ByVal) const {
+ MachineFunction &MF = DAG.getMachineFunction();
+ MachineFrameInfo *MFI = MF.getFrameInfo();
+ unsigned RegAreaSize = ByVal.NumRegs * CC.regSize();
+ unsigned FrameObjSize = std::max(Flags.getByValSize(), RegAreaSize);
+ int FrameObjOffset;
+
+ if (RegAreaSize)
+ FrameObjOffset = (int)CC.reservedArgArea() -
+ (int)((CC.numIntArgRegs() - ByVal.FirstIdx) * CC.regSize());
+ else
+ FrameObjOffset = ByVal.Address;
+
+ // Create frame object.
+ EVT PtrTy = getPointerTy();
+ int FI = MFI->CreateFixedObject(FrameObjSize, FrameObjOffset, true);
+ SDValue FIN = DAG.getFrameIndex(FI, PtrTy);
+ InVals.push_back(FIN);
+
+ if (!ByVal.NumRegs)
+ return;
+
+ // Copy arg registers.
+ EVT RegTy = MVT::getIntegerVT(CC.regSize() * 8);
+ const TargetRegisterClass *RC = getRegClassFor(RegTy);
+
+ for (unsigned I = 0; I < ByVal.NumRegs; ++I) {
+ unsigned ArgReg = CC.intArgRegs()[ByVal.FirstIdx + I];
+ unsigned VReg = AddLiveIn(MF, ArgReg, RC);
+ unsigned Offset = I * CC.regSize();
+ SDValue StorePtr = DAG.getNode(ISD::ADD, DL, PtrTy, FIN,
+ DAG.getConstant(Offset, PtrTy));
+ SDValue Store = DAG.getStore(Chain, DL, DAG.getRegister(VReg, RegTy),
+ StorePtr, MachinePointerInfo(FuncArg, Offset),
+ false, false, 0);
+ OutChains.push_back(Store);
+ }
+}
Modified: llvm/trunk/lib/Target/Mips/MipsISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsISelLowering.h?rev=166841&r1=166840&r2=166841&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsISelLowering.h (original)
+++ llvm/trunk/lib/Target/Mips/MipsISelLowering.h Fri Oct 26 19:10:18 2012
@@ -277,6 +277,16 @@
bool IsEligibleForTailCallOptimization(CallingConv::ID CalleeCC,
unsigned NextStackOffset) const;
+ /// copyByValArg - Copy argument registers which were used to pass a byval
+ /// argument to the stack. Create a stack frame object for the byval
+ /// argument.
+ void copyByValRegs(SDValue Chain, DebugLoc DL,
+ std::vector<SDValue> &OutChains, SelectionDAG &DAG,
+ const ISD::ArgFlagsTy &Flags,
+ SmallVectorImpl<SDValue> &InVals,
+ const Argument *FuncArg,
+ const MipsCC &CC, const ByValArgInfo &ByVal) const;
+
virtual SDValue
LowerFormalArguments(SDValue Chain,
CallingConv::ID CallConv, bool isVarArg,
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