#include "MSP430ISelLowering.h"
#include "MSP430.h"
#include "MSP430MachineFunctionInfo.h"
-#include "MSP430TargetMachine.h"
#include "MSP430Subtarget.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Function.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/CallingConv.h"
-#include "llvm/GlobalVariable.h"
-#include "llvm/GlobalAlias.h"
+#include "MSP430TargetMachine.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/GlobalAlias.h"
+#include "llvm/IR/GlobalVariable.h"
+#include "llvm/IR/Intrinsics.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
TargetLowering(tm, new TargetLoweringObjectFileELF()),
Subtarget(*tm.getSubtargetImpl()) {
- TD = getTargetData();
+ TD = getDataLayout();
// Set up the register classes.
addRegisterClass(MVT::i8, &MSP430::GR8RegClass);
setOperationAction(ISD::SDIVREM, MVT::i16, Expand);
setOperationAction(ISD::SREM, MVT::i16, Expand);
+ // varargs support
+ setOperationAction(ISD::VASTART, MVT::Other, Custom);
+ setOperationAction(ISD::VAARG, MVT::Other, Expand);
+ setOperationAction(ISD::VAEND, MVT::Other, Expand);
+ setOperationAction(ISD::VACOPY, MVT::Other, Expand);
+
// Libcalls names.
if (HWMultMode == HWMultIntr) {
setLibcallName(RTLIB::MUL_I8, "__mulqi3hw");
case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, DAG);
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
+ case ISD::VASTART: return LowerVASTART(Op, DAG);
default:
llvm_unreachable("unimplemented operand");
}
/// LowerCCCArguments - transform physical registers into virtual registers and
/// generate load operations for arguments places on the stack.
// FIXME: struct return stuff
-// FIXME: varargs
SDValue
MSP430TargetLowering::LowerCCCArguments(SDValue Chain,
CallingConv::ID CallConv,
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
MachineRegisterInfo &RegInfo = MF.getRegInfo();
+ MSP430MachineFunctionInfo *FuncInfo = MF.getInfo<MSP430MachineFunctionInfo>();
// Assign locations to all of the incoming arguments.
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
- getTargetMachine(), ArgLocs, *DAG.getContext());
+ getTargetMachine(), ArgLocs, *DAG.getContext());
CCInfo.AnalyzeFormalArguments(Ins, CC_MSP430);
- assert(!isVarArg && "Varargs not supported yet");
+ // Create frame index for the start of the first vararg value
+ if (isVarArg) {
+ unsigned Offset = CCInfo.getNextStackOffset();
+ FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, Offset, true));
+ }
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
CCValAssign &VA = ArgLocs[i];
} else {
// Sanity check
assert(VA.isMemLoc());
- // Load the argument to a virtual register
- unsigned ObjSize = VA.getLocVT().getSizeInBits()/8;
- if (ObjSize > 2) {
- errs() << "LowerFormalArguments Unhandled argument type: "
- << EVT(VA.getLocVT()).getEVTString()
- << "\n";
+
+ SDValue InVal;
+ ISD::ArgFlagsTy Flags = Ins[i].Flags;
+
+ if (Flags.isByVal()) {
+ int FI = MFI->CreateFixedObject(Flags.getByValSize(),
+ VA.getLocMemOffset(), true);
+ InVal = DAG.getFrameIndex(FI, getPointerTy());
+ } else {
+ // Load the argument to a virtual register
+ unsigned ObjSize = VA.getLocVT().getSizeInBits()/8;
+ if (ObjSize > 2) {
+ errs() << "LowerFormalArguments Unhandled argument type: "
+ << EVT(VA.getLocVT()).getEVTString()
+ << "\n";
+ }
+ // Create the frame index object for this incoming parameter...
+ int FI = MFI->CreateFixedObject(ObjSize, VA.getLocMemOffset(), true);
+
+ // Create the SelectionDAG nodes corresponding to a load
+ //from this parameter
+ SDValue FIN = DAG.getFrameIndex(FI, MVT::i16);
+ InVal = DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
+ MachinePointerInfo::getFixedStack(FI),
+ false, false, false, 0);
}
- // Create the frame index object for this incoming parameter...
- int FI = MFI->CreateFixedObject(ObjSize, VA.getLocMemOffset(), true);
-
- // Create the SelectionDAG nodes corresponding to a load
- //from this parameter
- SDValue FIN = DAG.getFrameIndex(FI, MVT::i16);
- InVals.push_back(DAG.getLoad(VA.getLocVT(), dl, Chain, FIN,
- MachinePointerInfo::getFixedStack(FI),
- false, false, false, 0));
+
+ InVals.push_back(InVal);
}
}
// CCState - Info about the registers and stack slot.
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
- getTargetMachine(), RVLocs, *DAG.getContext());
+ getTargetMachine(), RVLocs, *DAG.getContext());
// Analize return values.
CCInfo.AnalyzeReturn(Outs, RetCC_MSP430);
- // If this is the first return lowered for this function, add the regs to the
- // liveout set for the function.
- if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
- for (unsigned i = 0; i != RVLocs.size(); ++i)
- if (RVLocs[i].isRegLoc())
- DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
- }
-
SDValue Flag;
+ SmallVector<SDValue, 4> RetOps(1, Chain);
// Copy the result values into the output registers.
for (unsigned i = 0; i != RVLocs.size(); ++i) {
// Guarantee that all emitted copies are stuck together,
// avoiding something bad.
Flag = Chain.getValue(1);
+ RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
}
unsigned Opc = (CallConv == CallingConv::MSP430_INTR ?
MSP430ISD::RETI_FLAG : MSP430ISD::RET_FLAG);
+ RetOps[0] = Chain; // Update chain.
+
+ // Add the flag if we have it.
if (Flag.getNode())
- return DAG.getNode(Opc, dl, MVT::Other, Chain, Flag);
+ RetOps.push_back(Flag);
- // Return Void
- return DAG.getNode(Opc, dl, MVT::Other, Chain);
+ return DAG.getNode(Opc, dl, MVT::Other, &RetOps[0], RetOps.size());
}
/// LowerCCCCallTo - functions arguments are copied from virtual regs to
// Analyze operands of the call, assigning locations to each operand.
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
- getTargetMachine(), ArgLocs, *DAG.getContext());
+ getTargetMachine(), ArgLocs, *DAG.getContext());
CCInfo.AnalyzeCallOperands(Outs, CC_MSP430);
StackPtr,
DAG.getIntPtrConstant(VA.getLocMemOffset()));
+ SDValue MemOp;
+ ISD::ArgFlagsTy Flags = Outs[i].Flags;
+
+ if (Flags.isByVal()) {
+ SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i16);
+ MemOp = DAG.getMemcpy(Chain, dl, PtrOff, Arg, SizeNode,
+ Flags.getByValAlign(),
+ /*isVolatile*/false,
+ /*AlwaysInline=*/true,
+ MachinePointerInfo(),
+ MachinePointerInfo());
+ } else {
+ MemOp = DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo(),
+ false, false, 0);
+ }
- MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
- MachinePointerInfo(),false, false, 0));
+ MemOpChains.push_back(MemOp);
}
}
// Assign locations to each value returned by this call.
SmallVector<CCValAssign, 16> RVLocs;
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
- getTargetMachine(), RVLocs, *DAG.getContext());
+ getTargetMachine(), RVLocs, *DAG.getContext());
CCInfo.AnalyzeCallResult(Ins, RetCC_MSP430);
SelectionDAG &DAG) const {
DebugLoc dl = Op.getDebugLoc();
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
- SDValue Result = DAG.getBlockAddress(BA, getPointerTy(), /*isTarget=*/true);
+ SDValue Result = DAG.getTargetBlockAddress(BA, getPointerTy());
return DAG.getNode(MSP430ISD::Wrapper, dl, getPointerTy(), Result);
}
return FrameAddr;
}
+SDValue MSP430TargetLowering::LowerVASTART(SDValue Op,
+ SelectionDAG &DAG) const {
+ MachineFunction &MF = DAG.getMachineFunction();
+ MSP430MachineFunctionInfo *FuncInfo = MF.getInfo<MSP430MachineFunctionInfo>();
+
+ // Frame index of first vararg argument
+ SDValue FrameIndex = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
+ getPointerTy());
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
+
+ // Create a store of the frame index to the location operand
+ return DAG.getStore(Op.getOperand(0), Op.getDebugLoc(), FrameIndex,
+ Op.getOperand(1), MachinePointerInfo(SV),
+ false, false, 0);
+}
+
/// getPostIndexedAddressParts - returns true by value, base pointer and
/// offset pointer and addressing mode by reference if this node can be
/// combined with a load / store to form a post-indexed load / store.
return 0 && VT1 == MVT::i8 && VT2 == MVT::i16;
}
+bool MSP430TargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
+ return isZExtFree(Val.getValueType(), VT2);
+}
+
//===----------------------------------------------------------------------===//
// Other Lowering Code
//===----------------------------------------------------------------------===//