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-rw-r--r--llvm/lib/Target/Mips/MipsISelLowering.cpp285
1 files changed, 166 insertions, 119 deletions
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index c08367912aa..ef78df55f72 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -95,10 +95,60 @@ private:
originalTypeIsF128(MF.getFunction()->getReturnType(), nullptr));
}
+ /// Identify lowered values that originated from f128 arguments and record
+ /// this.
+ void PreAnalyzeCallOperandsForF128(
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ std::vector<TargetLowering::ArgListEntry> &FuncArgs, SDNode *CallNode) {
+ for (unsigned i = 0; i < Outs.size(); ++i)
+ OriginalArgWasF128.push_back(
+ originalTypeIsF128(FuncArgs[Outs[i].OrigArgIndex].Ty, CallNode));
+ }
+
+ /// Identify lowered values that originated from f128 arguments and record
+ /// this.
+ void
+ PreAnalyzeFormalArgumentsForF128(const SmallVectorImpl<ISD::InputArg> &Ins) {
+ const MachineFunction &MF = getMachineFunction();
+ for (unsigned i = 0; i < Ins.size(); ++i) {
+ Function::const_arg_iterator FuncArg = MF.getFunction()->arg_begin();
+
+ // SRet arguments cannot originate from f128 or {f128} returns so we just
+ // push false. We have to handle this specially since SRet arguments
+ // aren't mapped to an original argument.
+ if (Ins[i].Flags.isSRet()) {
+ OriginalArgWasF128.push_back(false);
+ continue;
+ }
+
+ assert(Ins[i].OrigArgIndex < MF.getFunction()->arg_size());
+ std::advance(FuncArg, Ins[i].OrigArgIndex);
+ OriginalArgWasF128.push_back(
+ originalTypeIsF128(FuncArg->getType(), nullptr));
+ }
+ }
+
/// Records whether the value has been lowered from an f128.
SmallVector<bool, 4> OriginalArgWasF128;
public:
+ // FIXME: Remove this from a public inteface ASAP. It's a temporary trap door
+ // to allow analyzeCallOperands to be removed incrementally.
+ void PreAnalyzeCallOperandsForF128_(
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ std::vector<TargetLowering::ArgListEntry> &FuncArgs, SDNode *CallNode) {
+ PreAnalyzeCallOperandsForF128(Outs, FuncArgs, CallNode);
+ }
+ // FIXME: Remove this from a public inteface ASAP. It's a temporary trap door
+ // to allow analyzeFormalArguments to be removed incrementally.
+ void
+ PreAnalyzeFormalArgumentsForF128_(const SmallVectorImpl<ISD::InputArg> &Ins) {
+ PreAnalyzeFormalArgumentsForF128(Ins);
+ }
+ // FIXME: Remove this from a public inteface ASAP. It's a temporary trap door
+ // to clean up after the above functions.
+ void ClearOriginalArgWasF128() { OriginalArgWasF128.clear(); }
+
MipsCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
SmallVectorImpl<CCValAssign> &locs, LLVMContext &C)
: CCState(CC, isVarArg, MF, locs, C) {}
@@ -2546,21 +2596,22 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
// Analyze operands of the call, assigning locations to each operand.
SmallVector<CCValAssign, 16> ArgLocs;
- CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(), ArgLocs,
- *DAG.getContext());
+ MipsCCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(), ArgLocs,
+ *DAG.getContext());
MipsCC MipsCCInfo(CallConv, Subtarget, CCInfo);
+ CCInfo.PreAnalyzeCallOperandsForF128_(Outs, CLI.getArgs(), Callee.getNode());
MipsCCInfo.analyzeCallOperands(Outs, IsVarArg, Subtarget.abiUsesSoftFloat(),
Callee.getNode(), CLI.getArgs(), CCInfo);
+ CCInfo.ClearOriginalArgWasF128();
// Get a count of how many bytes are to be pushed on the stack.
unsigned NextStackOffset = CCInfo.getNextStackOffset();
// Check if it's really possible to do a tail call.
if (IsTailCall)
- IsTailCall =
- isEligibleForTailCallOptimization(MipsCCInfo, NextStackOffset,
- *MF.getInfo<MipsFunctionInfo>());
+ IsTailCall = isEligibleForTailCallOptimization(
+ CCInfo, NextStackOffset, *MF.getInfo<MipsFunctionInfo>());
if (!IsTailCall && CLI.CS && CLI.CS->isMustTailCall())
report_fatal_error("failed to perform tail call elimination on a call "
@@ -2586,7 +2637,8 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
// With EABI is it possible to have 16 args on registers.
std::deque< std::pair<unsigned, SDValue> > RegsToPass;
SmallVector<SDValue, 8> MemOpChains;
- MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
+
+ CCInfo.rewindByValRegsInfo();
// Walk the register/memloc assignments, inserting copies/loads.
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
@@ -2597,14 +2649,19 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
// ByVal Arg.
if (Flags.isByVal()) {
+ unsigned FirstByValReg, LastByValReg;
+ unsigned ByValIdx = CCInfo.getInRegsParamsProcessed();
+ CCInfo.getInRegsParamInfo(ByValIdx, FirstByValReg, LastByValReg);
+
assert(Flags.getByValSize() &&
"ByVal args of size 0 should have been ignored by front-end.");
- assert(ByValArg != MipsCCInfo.byval_end());
+ assert(ByValIdx < CCInfo.getInRegsParamsCount());
assert(!IsTailCall &&
"Do not tail-call optimize if there is a byval argument.");
passByValArg(Chain, DL, RegsToPass, MemOpChains, StackPtr, MFI, DAG, Arg,
- MipsCCInfo, *ByValArg, Flags, Subtarget.isLittle(), VA);
- ++ByValArg;
+ MipsCCInfo, FirstByValReg, LastByValReg, Flags,
+ Subtarget.isLittle(), VA);
+ CCInfo.nextInRegsParam();
continue;
}
@@ -2632,6 +2689,9 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
}
}
break;
+ case CCValAssign::BCvt:
+ Arg = DAG.getNode(ISD::BITCAST, DL, LocVT, Arg);
+ break;
case CCValAssign::SExt:
Arg = DAG.getNode(ISD::SIGN_EXTEND, DL, LocVT, Arg);
break;
@@ -2829,19 +2889,21 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain,
// Assign locations to all of the incoming arguments.
SmallVector<CCValAssign, 16> ArgLocs;
- CCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(), ArgLocs,
- *DAG.getContext());
+ MipsCCState CCInfo(CallConv, IsVarArg, DAG.getMachineFunction(), ArgLocs,
+ *DAG.getContext());
MipsCC MipsCCInfo(CallConv, Subtarget, CCInfo);
Function::const_arg_iterator FuncArg =
DAG.getMachineFunction().getFunction()->arg_begin();
bool UseSoftFloat = Subtarget.abiUsesSoftFloat();
- MipsCCInfo.analyzeFormalArguments(Ins, UseSoftFloat, FuncArg, CCInfo);
+ CCInfo.PreAnalyzeFormalArgumentsForF128_(Ins);
+ MipsCCInfo.analyzeFormalArguments(Ins, UseSoftFloat, CCInfo);
+ CCInfo.ClearOriginalArgWasF128();
MipsFI->setFormalArgInfo(CCInfo.getNextStackOffset(),
- MipsCCInfo.hasByValArg());
+ CCInfo.getInRegsParamsCount() > 0);
unsigned CurArgIdx = 0;
- MipsCC::byval_iterator ByValArg = MipsCCInfo.byval_begin();
+ CCInfo.rewindByValRegsInfo();
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
@@ -2852,12 +2914,16 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain,
bool IsRegLoc = VA.isRegLoc();
if (Flags.isByVal()) {
+ unsigned FirstByValReg, LastByValReg;
+ unsigned ByValIdx = CCInfo.getInRegsParamsProcessed();
+ CCInfo.getInRegsParamInfo(ByValIdx, FirstByValReg, LastByValReg);
+
assert(Flags.getByValSize() &&
"ByVal args of size 0 should have been ignored by front-end.");
- assert(ByValArg != MipsCCInfo.byval_end());
+ assert(ByValIdx < CCInfo.getInRegsParamsCount());
copyByValRegs(Chain, DL, OutChains, DAG, Flags, InVals, &*FuncArg,
- MipsCCInfo, *ByValArg, VA);
- ++ByValArg;
+ MipsCCInfo, FirstByValReg, LastByValReg, VA);
+ CCInfo.nextInRegsParam();
continue;
}
@@ -2875,16 +2941,24 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain,
// If this is an 8 or 16-bit value, it has been passed promoted
// to 32 bits. Insert an assert[sz]ext to capture this, then
// truncate to the right size.
- if (VA.getLocInfo() != CCValAssign::Full) {
- unsigned Opcode = 0;
- if (VA.getLocInfo() == CCValAssign::SExt)
- Opcode = ISD::AssertSext;
- else if (VA.getLocInfo() == CCValAssign::ZExt)
- Opcode = ISD::AssertZext;
- if (Opcode)
- ArgValue = DAG.getNode(Opcode, DL, RegVT, ArgValue,
- DAG.getValueType(ValVT));
+ switch (VA.getLocInfo()) {
+ default:
+ llvm_unreachable("Unknown loc info!");
+ case CCValAssign::Full:
+ break;
+ case CCValAssign::SExt:
+ ArgValue = DAG.getNode(ISD::AssertSext, DL, RegVT, ArgValue,
+ DAG.getValueType(ValVT));
+ ArgValue = DAG.getNode(ISD::TRUNCATE, DL, ValVT, ArgValue);
+ break;
+ case CCValAssign::ZExt:
+ ArgValue = DAG.getNode(ISD::AssertZext, DL, RegVT, ArgValue,
+ DAG.getValueType(ValVT));
ArgValue = DAG.getNode(ISD::TRUNCATE, DL, ValVT, ArgValue);
+ break;
+ case CCValAssign::BCvt:
+ ArgValue = DAG.getNode(ISD::BITCAST, DL, ValVT, ArgValue);
+ break;
}
// Handle floating point arguments passed in integer registers and
@@ -3556,18 +3630,10 @@ void MipsTargetLowering::MipsCC::analyzeCallOperands(
ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
bool R;
- if (ArgFlags.isByVal()) {
- handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, State);
- continue;
- }
-
if (IsVarArg && !Args[I].IsFixed)
R = CC_Mips_VarArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, State);
- else {
- MVT RegVT = getRegVT(ArgVT, FuncArgs[Args[I].OrigArgIndex].Ty, CallNode,
- IsSoftFloat);
- R = FixedFn(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, State);
- }
+ else
+ R = FixedFn(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, State);
if (R) {
#ifndef NDEBUG
@@ -3581,24 +3647,14 @@ void MipsTargetLowering::MipsCC::analyzeCallOperands(
void MipsTargetLowering::MipsCC::analyzeFormalArguments(
const SmallVectorImpl<ISD::InputArg> &Args, bool IsSoftFloat,
- Function::const_arg_iterator FuncArg, CCState &State) {
+ CCState &State) {
unsigned NumArgs = Args.size();
- unsigned CurArgIdx = 0;
for (unsigned I = 0; I != NumArgs; ++I) {
MVT ArgVT = Args[I].VT;
ISD::ArgFlagsTy ArgFlags = Args[I].Flags;
- std::advance(FuncArg, Args[I].OrigArgIndex - CurArgIdx);
- CurArgIdx = Args[I].OrigArgIndex;
-
- if (ArgFlags.isByVal()) {
- handleByValArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, State);
- continue;
- }
-
- MVT RegVT = getRegVT(ArgVT, FuncArg->getType(), nullptr, IsSoftFloat);
- if (!CC_Mips_FixedArg(I, ArgVT, RegVT, CCValAssign::Full, ArgFlags, State))
+ if (!CC_Mips_FixedArg(I, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, State))
continue;
#ifndef NDEBUG
@@ -3609,30 +3665,6 @@ void MipsTargetLowering::MipsCC::analyzeFormalArguments(
}
}
-void MipsTargetLowering::MipsCC::handleByValArg(unsigned ValNo, MVT ValVT,
- MVT LocVT,
- CCValAssign::LocInfo LocInfo,
- ISD::ArgFlagsTy ArgFlags,
- CCState &State) {
- assert(ArgFlags.getByValSize() && "Byval argument's size shouldn't be 0.");
-
- struct ByValArgInfo ByVal;
- unsigned RegSizeInBytes = Subtarget.getGPRSizeInBytes();
- unsigned ByValSize =
- RoundUpToAlignment(ArgFlags.getByValSize(), RegSizeInBytes);
- unsigned Align = std::min(std::max(ArgFlags.getByValAlign(), RegSizeInBytes),
- RegSizeInBytes * 2);
-
- if (useRegsForByval())
- allocateRegs(ByVal, ByValSize, Align, State);
-
- // Allocate space on caller's stack.
- unsigned Offset =
- State.AllocateStack(ByValSize - RegSizeInBytes * ByVal.NumRegs, Align);
- State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
- ByValArgs.push_back(ByVal);
-}
-
unsigned MipsTargetLowering::MipsCC::reservedArgArea() const {
return (Subtarget.isABI_O32() && (CallConv != CallingConv::Fast)) ? 16 : 0;
}
@@ -3643,35 +3675,6 @@ const ArrayRef<MCPhysReg> MipsTargetLowering::MipsCC::intArgRegs() const {
return makeArrayRef(Mips64IntRegs);
}
-const MCPhysReg *MipsTargetLowering::MipsCC::shadowRegs() const {
- return Subtarget.isABI_O32() ? O32IntRegs : Mips64DPRegs;
-}
-
-void MipsTargetLowering::MipsCC::allocateRegs(ByValArgInfo &ByVal,
- unsigned ByValSize,
- unsigned Align, CCState &State) {
- unsigned RegSizeInBytes = Subtarget.getGPRSizeInBytes();
- const ArrayRef<MCPhysReg> IntArgRegs = intArgRegs();
- const MCPhysReg *ShadowRegs = shadowRegs();
- assert(!(ByValSize % RegSizeInBytes) && !(Align % RegSizeInBytes) &&
- "Byval argument's size and alignment should be a multiple of"
- "RegSizeInBytes.");
-
- ByVal.FirstIdx =
- State.getFirstUnallocated(IntArgRegs.data(), IntArgRegs.size());
-
- // If Align > RegSizeInBytes, the first arg register must be even.
- if ((Align > RegSizeInBytes) && (ByVal.FirstIdx % 2)) {
- State.AllocateReg(IntArgRegs[ByVal.FirstIdx], ShadowRegs[ByVal.FirstIdx]);
- ++ByVal.FirstIdx;
- }
-
- // Mark the registers allocated.
- for (unsigned I = ByVal.FirstIdx; ByValSize && (I < IntArgRegs.size());
- ByValSize -= RegSizeInBytes, ++I, ++ByVal.NumRegs)
- State.AllocateReg(IntArgRegs[I], ShadowRegs[I]);
-}
-
MVT MipsTargetLowering::MipsCC::getRegVT(MVT VT, const Type *OrigTy,
const SDNode *CallNode,
bool IsSoftFloat) const {
@@ -3690,19 +3693,20 @@ MVT MipsTargetLowering::MipsCC::getRegVT(MVT VT, const Type *OrigTy,
void MipsTargetLowering::copyByValRegs(
SDValue Chain, SDLoc DL, std::vector<SDValue> &OutChains, SelectionDAG &DAG,
const ISD::ArgFlagsTy &Flags, SmallVectorImpl<SDValue> &InVals,
- const Argument *FuncArg, const MipsCC &CC, const ByValArgInfo &ByVal,
- const CCValAssign &VA) const {
+ const Argument *FuncArg, const MipsCC &CC, unsigned FirstReg,
+ unsigned LastReg, const CCValAssign &VA) const {
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
unsigned GPRSizeInBytes = Subtarget.getGPRSizeInBytes();
- unsigned RegAreaSize = ByVal.NumRegs * GPRSizeInBytes;
+ unsigned NumRegs = LastReg - FirstReg;
+ unsigned RegAreaSize = NumRegs * GPRSizeInBytes;
unsigned FrameObjSize = std::max(Flags.getByValSize(), RegAreaSize);
int FrameObjOffset;
if (RegAreaSize)
FrameObjOffset =
(int)CC.reservedArgArea() -
- (int)((CC.intArgRegs().size() - ByVal.FirstIdx) * GPRSizeInBytes);
+ (int)((CC.intArgRegs().size() - FirstReg) * GPRSizeInBytes);
else
FrameObjOffset = VA.getLocMemOffset();
@@ -3712,15 +3716,15 @@ void MipsTargetLowering::copyByValRegs(
SDValue FIN = DAG.getFrameIndex(FI, PtrTy);
InVals.push_back(FIN);
- if (!ByVal.NumRegs)
+ if (!NumRegs)
return;
// Copy arg registers.
MVT RegTy = MVT::getIntegerVT(GPRSizeInBytes * 8);
const TargetRegisterClass *RC = getRegClassFor(RegTy);
- for (unsigned I = 0; I < ByVal.NumRegs; ++I) {
- unsigned ArgReg = CC.intArgRegs()[ByVal.FirstIdx + I];
+ for (unsigned I = 0; I < NumRegs; ++I) {
+ unsigned ArgReg = CC.intArgRegs()[FirstReg + I];
unsigned VReg = addLiveIn(MF, ArgReg, RC);
unsigned Offset = I * GPRSizeInBytes;
SDValue StorePtr = DAG.getNode(ISD::ADD, DL, PtrTy, FIN,
@@ -3738,29 +3742,29 @@ void MipsTargetLowering::passByValArg(
std::deque<std::pair<unsigned, SDValue>> &RegsToPass,
SmallVectorImpl<SDValue> &MemOpChains, SDValue StackPtr,
MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg, const MipsCC &CC,
- const ByValArgInfo &ByVal, const ISD::ArgFlagsTy &Flags, bool isLittle,
- const CCValAssign &VA) const {
+ unsigned FirstReg, unsigned LastReg, const ISD::ArgFlagsTy &Flags,
+ bool isLittle, const CCValAssign &VA) const {
unsigned ByValSizeInBytes = Flags.getByValSize();
unsigned OffsetInBytes = 0; // From beginning of struct
unsigned RegSizeInBytes = Subtarget.getGPRSizeInBytes();
unsigned Alignment = std::min(Flags.getByValAlign(), RegSizeInBytes);
EVT PtrTy = getPointerTy(), RegTy = MVT::getIntegerVT(RegSizeInBytes * 8);
+ unsigned NumRegs = LastReg - FirstReg;
- if (ByVal.NumRegs) {
+ if (NumRegs) {
const ArrayRef<MCPhysReg> ArgRegs = CC.intArgRegs();
- bool LeftoverBytes = (ByVal.NumRegs * RegSizeInBytes > ByValSizeInBytes);
+ bool LeftoverBytes = (NumRegs * RegSizeInBytes > ByValSizeInBytes);
unsigned I = 0;
// Copy words to registers.
- for (; I < ByVal.NumRegs - LeftoverBytes;
- ++I, OffsetInBytes += RegSizeInBytes) {
+ for (; I < NumRegs - LeftoverBytes; ++I, OffsetInBytes += RegSizeInBytes) {
SDValue LoadPtr = DAG.getNode(ISD::ADD, DL, PtrTy, Arg,
DAG.getConstant(OffsetInBytes, PtrTy));
SDValue LoadVal = DAG.getLoad(RegTy, DL, Chain, LoadPtr,
MachinePointerInfo(), false, false, false,
Alignment);
MemOpChains.push_back(LoadVal.getValue(1));
- unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
+ unsigned ArgReg = ArgRegs[FirstReg + I];
RegsToPass.push_back(std::make_pair(ArgReg, LoadVal));
}
@@ -3770,9 +3774,6 @@ void MipsTargetLowering::passByValArg(
// Copy the remainder of the byval argument with sub-word loads and shifts.
if (LeftoverBytes) {
- assert((ByValSizeInBytes > OffsetInBytes) &&
- (ByValSizeInBytes < OffsetInBytes + RegSizeInBytes) &&
- "Size of the remainder should be smaller than RegSizeInBytes.");
SDValue Val;
for (unsigned LoadSizeInBytes = RegSizeInBytes / 2, TotalBytesLoaded = 0;
@@ -3812,7 +3813,7 @@ void MipsTargetLowering::passByValArg(
Alignment = std::min(Alignment, LoadSizeInBytes);
}
- unsigned ArgReg = ArgRegs[ByVal.FirstIdx + I];
+ unsigned ArgReg = ArgRegs[FirstReg + I];
RegsToPass.push_back(std::make_pair(ArgReg, Val));
return;
}
@@ -3875,3 +3876,49 @@ void MipsTargetLowering::writeVarArgRegs(std::vector<SDValue> &OutChains,
OutChains.push_back(Store);
}
}
+
+void MipsTargetLowering::HandleByVal(CCState *State, unsigned &Size,
+ unsigned Align) const {
+ MachineFunction &MF = State->getMachineFunction();
+ const TargetFrameLowering *TFL = MF.getSubtarget().getFrameLowering();
+
+ assert(Size && "Byval argument's size shouldn't be 0.");
+
+ Align = std::min(Align, TFL->getStackAlignment());
+
+ unsigned FirstReg = 0;
+ unsigned NumRegs = 0;
+
+ if (State->getCallingConv() != CallingConv::Fast) {
+ unsigned RegSizeInBytes = Subtarget.getGPRSizeInBytes();
+ const ArrayRef<MCPhysReg> IntArgRegs = Subtarget.getABI().GetByValArgRegs();
+ // FIXME: The O32 case actually describes no shadow registers.
+ const MCPhysReg *ShadowRegs =
+ Subtarget.isABI_O32() ? IntArgRegs.data() : Mips64DPRegs;
+
+ // We used to check the size as well but we can't do that anymore since
+ // CCState::HandleByVal() rounds up the size after calling this function.
+ assert(!(Align % RegSizeInBytes) &&
+ "Byval argument's alignment should be a multiple of"
+ "RegSizeInBytes.");
+
+ FirstReg = State->getFirstUnallocated(IntArgRegs.data(), IntArgRegs.size());
+
+ // If Align > RegSizeInBytes, the first arg register must be even.
+ // FIXME: This condition happens to do the right thing but it's not the
+ // right way to test it. We want to check that the stack frame offset
+ // of the register is aligned.
+ if ((Align > RegSizeInBytes) && (FirstReg % 2)) {
+ State->AllocateReg(IntArgRegs[FirstReg], ShadowRegs[FirstReg]);
+ ++FirstReg;
+ }
+
+ // Mark the registers allocated.
+ Size = RoundUpToAlignment(Size, RegSizeInBytes);
+ for (unsigned I = FirstReg; Size > 0 && (I < IntArgRegs.size());
+ Size -= RegSizeInBytes, ++I, ++NumRegs)
+ State->AllocateReg(IntArgRegs[I], ShadowRegs[I]);
+ }
+
+ State->addInRegsParamInfo(FirstReg, FirstReg + NumRegs);
+}
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