SDValue MSP430TargetLowering::LowerRETURNADDR(SDValue Op,
SelectionDAG &DAG) const {
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setReturnAddressIsTaken(true);
if (verifyReturnAddressArgumentIsConstant(Op, DAG))
return SDValue();
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
SDLoc dl(Op);
auto PtrVT = getPointerTy(DAG.getDataLayout());
if (Depth > 0) {
SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
SDValue Offset =
DAG.getConstant(DAG.getDataLayout().getPointerSize(), dl, MVT::i16);
return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
DAG.getNode(ISD::ADD, dl, PtrVT, FrameAddr, Offset),
MachinePointerInfo(), false, false, false, 0);
}
// Just load the return address.
SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), RetAddrFI,
MachinePointerInfo(), false, false, false, 0);
}
SDValue NvfcTargetLowering::LowerFRAMEADDR(SDValue Op,
SelectionDAG &DAG) const {
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
Nvfc::FP, VT);
while (Depth--)
FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, NULL, 0,
false, false, 0);
return FrameAddr;
}
SDValue MipsTargetLowering::
LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG)
{
if (!Subtarget->isMips1())
return Op;
MachineFunction &MF = DAG.getMachineFunction();
unsigned CCReg = AddLiveIn(MF, Mips::FCR31, Mips::CCRRegisterClass);
SDValue Chain = DAG.getEntryNode();
DebugLoc dl = Op.getDebugLoc();
SDValue Src = Op.getOperand(0);
// Set the condition register
SDValue CondReg = DAG.getCopyFromReg(Chain, dl, CCReg, MVT::i32);
CondReg = DAG.getCopyToReg(Chain, dl, Mips::AT, CondReg);
CondReg = DAG.getCopyFromReg(CondReg, dl, Mips::AT, MVT::i32);
SDValue Cst = DAG.getConstant(3, MVT::i32);
SDValue Or = DAG.getNode(ISD::OR, dl, MVT::i32, CondReg, Cst);
Cst = DAG.getConstant(2, MVT::i32);
SDValue Xor = DAG.getNode(ISD::XOR, dl, MVT::i32, Or, Cst);
SDValue InFlag(0, 0);
CondReg = DAG.getCopyToReg(Chain, dl, Mips::FCR31, Xor, InFlag);
// Emit the round instruction and bit convert to integer
SDValue Trunc = DAG.getNode(MipsISD::FPRound, dl, MVT::f32,
Src, CondReg.getValue(1));
SDValue BitCvt = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Trunc);
return BitCvt;
}
static SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) {
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setReturnAddressIsTaken(true);
EVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc();
unsigned RetReg = SP::I7;
uint64_t depth = Op.getConstantOperandVal(0);
SDValue RetAddr;
if (depth == 0)
RetAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, RetReg, VT);
else {
// flush first to make sure the windowed registers' values are in stack
SDValue Chain = getFLUSHW(Op, DAG);
RetAddr = DAG.getCopyFromReg(Chain, dl, SP::I6, VT);
for (uint64_t i = 0; i != depth; ++i) {
SDValue Ptr = DAG.getNode(ISD::ADD,
dl, MVT::i32,
RetAddr,
DAG.getIntPtrConstant((i == depth-1)?60:56));
RetAddr = DAG.getLoad(MVT::i32, dl,
Chain,
Ptr,
MachinePointerInfo(), false, false, 0);
}
}
return RetAddr;
}
SDValue Cpu0TargetLowering::
LowerJumpTable(SDValue Op, SelectionDAG &DAG) const
{
SDValue HiPart, JTI, JTILo;
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
EVT PtrVT = Op.getValueType();
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
if (!IsPIC) {
JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, Cpu0II::MO_ABS);
HiPart = DAG.getNode(Cpu0ISD::Hi, dl, PtrVT, JTI);
JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, Cpu0II::MO_ABS);
} else {// Emit Load from Global Pointer
unsigned GOTFlag = Cpu0II::MO_GOT;
unsigned OfstFlag = Cpu0II::MO_ABS;
JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, GOTFlag);
JTI = DAG.getNode(Cpu0ISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
JTI);
HiPart = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), JTI,
MachinePointerInfo(), false, false, false, 0);
JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, OfstFlag);
}
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, dl, PtrVT, JTILo);
return DAG.getNode(ISD::ADD, dl, PtrVT, HiPart, Lo);
}
SDValue LanaiTargetLowering::LowerFRAMEADDR(SDValue Op,
SelectionDAG &DAG) const {
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
SDLoc DL(Op);
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), DL, Lanai::FP, VT);
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
while (Depth--) {
const unsigned Offset = -8;
SDValue Ptr = DAG.getNode(ISD::ADD, DL, VT, FrameAddr,
DAG.getIntPtrConstant(Offset, DL));
FrameAddr = DAG.getLoad(VT, DL, DAG.getEntryNode(), Ptr,
MachinePointerInfo(), false, false, false, 0);
}
return FrameAddr;
}
SDValue Cpu0TargetLowering::getAddrGlobal(SDValue Op, SelectionDAG &DAG,
unsigned Flag) const {
SDLoc DL = SDLoc(Op);
EVT Ty = Op.getValueType();
SDValue Tgt = DAG.getNode(Cpu0ISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty),
getTargetNode(Op, DAG, Flag));
return DAG.getLoad(Ty, DL, DAG.getEntryNode(), Tgt,
MachinePointerInfo::getGOT(), false, false, false, 0);
}
// Global addresses are stored in the per-function constant pool.
SDValue
VectorProcTargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const
{
EVT PtrVT = getPointerTy();
DebugLoc dl = Op.getDebugLoc();
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
SDValue CPIdx = DAG.getTargetConstantPool(GV, MVT::i32);
return DAG.getLoad(MVT::i32, dl, DAG.getEntryNode(), CPIdx,
MachinePointerInfo::getConstantPool(), false, false, false, 4);
}
SDValue AVM2TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const
{
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) && "only current frame addr supported");
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AVM2::EBP, VT);
return FrameAddr;
}
SDValue Cpu0TargetLowering::getAddrGlobalLargeGOT(SDValue Op, SelectionDAG &DAG,
unsigned HiFlag,
unsigned LoFlag) const {
SDLoc DL = SDLoc(Op);
EVT Ty = Op.getValueType();
SDValue Hi = DAG.getNode(Cpu0ISD::Hi, DL, Ty, getTargetNode(Op, DAG, HiFlag));
Hi = DAG.getNode(ISD::ADD, DL, Ty, Hi, getGlobalReg(DAG, Ty));
SDValue Wrapper = DAG.getNode(Cpu0ISD::Wrapper, DL, Ty, Hi,
getTargetNode(Op, DAG, LoFlag));
return DAG.getLoad(Ty, DL, DAG.getEntryNode(), Wrapper,
MachinePointerInfo::getGOT(), false, false, false, 0);
}
SDValue Cpu0TargetLowering::getAddrLocal(SDValue Op, SelectionDAG &DAG) const {
SDLoc DL = SDLoc(Op);
EVT Ty = Op.getValueType();
unsigned GOTFlag = Cpu0II::MO_GOT;
SDValue GOT = DAG.getNode(Cpu0ISD::Wrapper, DL, Ty, getGlobalReg(DAG, Ty),
getTargetNode(Op, DAG, GOTFlag));
SDValue Load = DAG.getLoad(Ty, DL, DAG.getEntryNode(), GOT,
MachinePointerInfo::getGOT(), false, false, false,
0);
unsigned LoFlag = Cpu0II::MO_ABS_LO;
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, DL, Ty, getTargetNode(Op, DAG, LoFlag));
return DAG.getNode(ISD::ADD, DL, Ty, Load, Lo);
}
SDValue ARCTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
const ARCRegisterInfo &ARI = *Subtarget.getRegisterInfo();
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
MFI.setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
SDLoc dl(Op);
assert(cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0 &&
"Only support lowering frame addr of current frame.");
unsigned FrameReg = ARI.getFrameRegister(MF);
return DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
}
SDValue WebAssemblyTargetLowering::LowerVASTART(SDValue Op,
SelectionDAG &DAG) const {
SDLoc DL(Op);
EVT PtrVT = getPointerTy(DAG.getMachineFunction().getDataLayout());
auto *MFI = DAG.getMachineFunction().getInfo<WebAssemblyFunctionInfo>();
const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
SDValue ArgN = DAG.getCopyFromReg(DAG.getEntryNode(), DL,
MFI->getVarargBufferVreg(), PtrVT);
return DAG.getStore(Op.getOperand(0), DL, ArgN, Op.getOperand(1),
MachinePointerInfo(SV), false, false, 0);
}
SDValue Cpu0TargetLowering::
LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
// check the depth
assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
"Frame address can only be determined for current frame.");
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
DebugLoc dl = Op.getDebugLoc();
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
Cpu0::FP, VT);
return FrameAddr;
}
SDValue NvfcTargetLowering::LowerRETURNADDR(SDValue Op,
SelectionDAG &DAG) const {
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setReturnAddressIsTaken(true);
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
DebugLoc dl = Op.getDebugLoc();
if (Depth > 0) {
SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
SDValue Offset =
DAG.getConstant(TD->getPointerSize(), MVT::i32);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
DAG.getNode(ISD::ADD, dl, getPointerTy(),
FrameAddr, Offset),
NULL, 0, false, false, 0);
}
// Just load the return address.
SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
RetAddrFI, NULL, 0, false, false, 0);
}
SDValue LanaiTargetLowering::LowerRETURNADDR(SDValue Op,
SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
MFI->setReturnAddressIsTaken(true);
EVT VT = Op.getValueType();
SDLoc DL(Op);
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
if (Depth) {
SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
const unsigned Offset = -4;
SDValue Ptr = DAG.getNode(ISD::ADD, DL, VT, FrameAddr,
DAG.getIntPtrConstant(Offset, DL));
return DAG.getLoad(VT, DL, DAG.getEntryNode(), Ptr, MachinePointerInfo(),
false, false, false, 0);
}
// Return the link register, which contains the return address.
// Mark it an implicit live-in.
unsigned Reg = MF.addLiveIn(TRI->getRARegister(), getRegClassFor(MVT::i32));
return DAG.getCopyFromReg(DAG.getEntryNode(), DL, Reg, VT);
}
SDValue WebAssemblyTargetLowering::LowerFRAMEADDR(SDValue Op,
SelectionDAG &DAG) const {
// Non-zero depths are not supported by WebAssembly currently. Use the
// legalizer's default expansion, which is to return 0 (what this function is
// documented to do).
if (Op.getConstantOperandVal(0) > 0)
return SDValue();
DAG.getMachineFunction().getFrameInfo()->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
unsigned FP =
Subtarget->getRegisterInfo()->getFrameRegister(DAG.getMachineFunction());
return DAG.getCopyFromReg(DAG.getEntryNode(), SDLoc(Op), FP, VT);
}
SDValue WebAssemblyTargetLowering::LowerVASTART(SDValue Op,
SelectionDAG &DAG) const {
SDLoc DL(Op);
EVT PtrVT = getPointerTy(DAG.getMachineFunction().getDataLayout());
// The incoming non-fixed arguments are placed on the top of the stack, with
// natural alignment, at the point of the call, so the base pointer is just
// the current frame pointer.
DAG.getMachineFunction().getFrameInfo()->setFrameAddressIsTaken(true);
unsigned FP =
Subtarget->getRegisterInfo()->getFrameRegister(DAG.getMachineFunction());
SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), DL, FP, PtrVT);
const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
return DAG.getStore(Op.getOperand(0), DL, FrameAddr, Op.getOperand(1),
MachinePointerInfo(SV), false, false, 0);
}
SDValue
VectorProcTargetLowering::LowerConstant(SDValue Op, SelectionDAG &DAG) const
{
DebugLoc dl = Op.getDebugLoc();
EVT PtrVT = Op.getValueType();
ConstantSDNode *C = cast<ConstantSDNode>(Op);
if (C->getAPIntValue().abs().ult(0x4000))
{
// Don't need to convert to constant pool reference. This will fit in
// the immediate field of a single instruction, sign extended (15 bits).
return SDValue();
}
SDValue CPIdx = DAG.getConstantPool(C->getConstantIntValue(), MVT::i32);
return DAG.getLoad(MVT::i32, dl, DAG.getEntryNode(), CPIdx,
MachinePointerInfo::getConstantPool(), false, false, false, 4);
}
SDValue Cpu0TargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) const {
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
SDVTList VTs = DAG.getVTList(MVT::i32);
Cpu0TargetObjectFile &TLOF = (Cpu0TargetObjectFile&)getObjFileLowering();
// %gp_rel relocation
if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
Cpu0II::MO_GPREL);
SDValue GPRelNode = DAG.getNode(Cpu0ISD::GPRel, dl, VTs, &GA, 1);
SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
return DAG.getNode(ISD::ADD, dl, MVT::i32, GOT, GPRelNode);
}
// %hi/%lo relocation
SDValue GAHi = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
Cpu0II::MO_ABS_HI);
SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
Cpu0II::MO_ABS_LO);
SDValue HiPart = DAG.getNode(Cpu0ISD::Hi, dl, VTs, &GAHi, 1);
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, dl, MVT::i32, GALo);
return DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
}
EVT ValTy = Op.getValueType();
bool HasGotOfst = (GV->hasInternalLinkage() ||
(GV->hasLocalLinkage() && !isa<Function>(GV)));
unsigned GotFlag = (HasGotOfst ? Cpu0II::MO_GOT : Cpu0II::MO_GOT16);
SDValue GA = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0, GotFlag);
GA = DAG.getNode(Cpu0ISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), GA);
SDValue ResNode = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), GA,
MachinePointerInfo(), false, false, false, 0);
// On functions and global targets not internal linked only
// a load from got/GP is necessary for PIC to work.
if (!HasGotOfst)
return ResNode;
SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0,
Cpu0II::MO_ABS_LO);
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, dl, ValTy, GALo);
return DAG.getNode(ISD::ADD, dl, ValTy, ResNode, Lo);
}
SDValue SparcTargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) const {
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
// FIXME there isn't really any debug info here
DebugLoc dl = Op.getDebugLoc();
SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, GA);
SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, GA);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
getPointerTy());
SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
GlobalBase, RelAddr);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
AbsAddr, NULL, 0, false, false, 0);
}
SDValue SparcTargetLowering::LowerConstantPool(SDValue Op,
SelectionDAG &DAG) const {
ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
// FIXME there isn't really any debug info here
DebugLoc dl = Op.getDebugLoc();
const Constant *C = N->getConstVal();
SDValue CP = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment());
SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, CP);
SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, CP);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
getPointerTy());
SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
GlobalBase, RelAddr);
return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
AbsAddr, NULL, 0, false, false, 0);
}
SDValue Cpu0TargetLowering::
LowerConstantPool(SDValue Op, SelectionDAG &DAG) const
{
SDValue ResNode;
ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
const Constant *C = N->getConstVal();
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
// gp_rel relocation
// FIXME: we should reference the constant pool using small data sections,
// but the asm printer currently doesn't support this feature without
// hacking it. This feature should come soon so we can uncomment the
// stuff below.
//if (IsInSmallSection(C->getType())) {
// SDValue GPRelNode = DAG.getNode(Cpu0ISD::GPRel, MVT::i32, CP);
// SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
// ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
SDValue CPHi = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
N->getOffset(), Cpu0II::MO_ABS);
SDValue ResNode = DAG.getNode(Cpu0ISD::Hi, dl, MVT::i32, CPHi);
} else {
EVT ValTy = Op.getValueType();
unsigned GOTFlag = Cpu0II::MO_GOT;
unsigned OFSTFlag = Cpu0II::MO_ABS;
SDValue CP = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
N->getOffset(), GOTFlag);
CP = DAG.getNode(Cpu0ISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), CP);
SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), CP,
MachinePointerInfo::getConstantPool(), false,
false, false, 0);
SDValue CPLo = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
N->getOffset(), OFSTFlag);
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, dl, ValTy, CPLo);
ResNode = DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
}
return ResNode;
}
SDValue Cpu0TargetLowering::LowerBlockAddress(SDValue Op,
SelectionDAG &DAG) const {
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
return DAG.getBlockAddress(BA, MVT::i32, true, Cpu0II::MO_ABS);
}
EVT ValTy = Op.getValueType();
unsigned GOTFlag = Cpu0II::MO_GOT;
unsigned OFSTFlag = Cpu0II::MO_ABS;
SDValue BAGOTOffset = DAG.getBlockAddress(BA, ValTy, true, GOTFlag);
BAGOTOffset = DAG.getNode(Cpu0ISD::Wrapper, dl, ValTy,
GetGlobalReg(DAG, ValTy), BAGOTOffset);
SDValue BALOOffset = DAG.getBlockAddress(BA, ValTy, true, OFSTFlag);
SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), BAGOTOffset,
MachinePointerInfo(), false, false, false, 0);
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, dl, ValTy, BALOOffset);
return DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
}
SDValue SystemZTargetLowering::LowerGlobalAddress(SDValue Op,
SelectionDAG &DAG) {
DebugLoc dl = Op.getDebugLoc();
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
bool IsPic = getTargetMachine().getRelocationModel() == Reloc::PIC_;
bool ExtraLoadRequired =
Subtarget.GVRequiresExtraLoad(GV, getTargetMachine(), false);
SDValue Result;
if (!IsPic && !ExtraLoadRequired) {
Result = DAG.getTargetGlobalAddress(GV, getPointerTy(), Offset);
Offset = 0;
} else {
unsigned char OpFlags = 0;
if (ExtraLoadRequired)
OpFlags = SystemZII::MO_GOTENT;
Result = DAG.getTargetGlobalAddress(GV, getPointerTy(), 0, OpFlags);
}
Result = DAG.getNode(SystemZISD::PCRelativeWrapper, dl,
getPointerTy(), Result);
if (ExtraLoadRequired)
Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
PseudoSourceValue::getGOT(), 0, false, false, 0);
// If there was a non-zero offset that we didn't fold, create an explicit
// addition for it.
if (Offset != 0)
Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
DAG.getConstant(Offset, getPointerTy()));
return Result;
}
SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) {
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
SDVTList VTs = DAG.getVTList(MVT::i32);
MipsTargetObjectFile &TLOF = (MipsTargetObjectFile&)getObjFileLowering();
// %gp_rel relocation
if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, dl, VTs, &GA, 1);
SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
return DAG.getNode(ISD::ADD, dl, MVT::i32, GOT, GPRelNode);
}
// %hi/%lo relocation
SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, VTs, &GA, 1);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, GA);
return DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
} else { // Abicall relocations, TODO: make this cleaner.
SDValue ResNode = DAG.getLoad(MVT::i32, dl,
DAG.getEntryNode(), GA, NULL, 0);
// On functions and global targets not internal linked only
// a load from got/GP is necessary for PIC to work.
if (!GV->hasLocalLinkage() || isa<Function>(GV))
return ResNode;
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, GA);
return DAG.getNode(ISD::ADD, dl, MVT::i32, ResNode, Lo);
}
llvm_unreachable("Dont know how to handle GlobalAddress");
return SDValue(0,0);
}
SDValue MipsTargetLowering::
LowerJumpTable(SDValue Op, SelectionDAG &DAG)
{
SDValue ResNode;
SDValue HiPart;
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
EVT PtrVT = Op.getValueType();
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
SDVTList VTs = DAG.getVTList(MVT::i32);
SDValue Ops[] = { JTI };
HiPart = DAG.getNode(MipsISD::Hi, dl, VTs, Ops, 1);
} else // Emit Load from Global Pointer
HiPart = DAG.getLoad(MVT::i32, dl, DAG.getEntryNode(), JTI, NULL, 0);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, JTI);
ResNode = DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
return ResNode;
}
static SDValue PerformDivRemCombine(SDNode *N, SelectionDAG& DAG,
TargetLowering::DAGCombinerInfo &DCI,
const Cpu0Subtarget* Subtarget) {
if (DCI.isBeforeLegalizeOps())
return SDValue();
EVT Ty = N->getValueType(0);
unsigned LO = Cpu0::LO;
unsigned HI = Cpu0::HI;
unsigned opc = N->getOpcode() == ISD::SDIVREM ? Cpu0ISD::DivRem :
Cpu0ISD::DivRemU;
SDLoc DL(N);
SDValue DivRem = DAG.getNode(opc, DL, MVT::Glue,
N->getOperand(0), N->getOperand(1));
SDValue InChain = DAG.getEntryNode();
SDValue InGlue = DivRem;
// insert MFLO
if (N->hasAnyUseOfValue(0)) {
SDValue CopyFromLo = DAG.getCopyFromReg(InChain, DL, LO, Ty,
InGlue);
DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
InChain = CopyFromLo.getValue(1);
InGlue = CopyFromLo.getValue(2);
}
// insert MFHI
if (N->hasAnyUseOfValue(1)) {
SDValue CopyFromHi = DAG.getCopyFromReg(InChain, DL,
HI, Ty, InGlue);
DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
}
return SDValue();
}
SDValue MSP430TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
SDValue LHS = Op.getOperand(0);
SDValue RHS = Op.getOperand(1);
DebugLoc dl = Op.getDebugLoc();
// If we are doing an AND and testing against zero, then the CMP
// will not be generated. The AND (or BIT) will generate the condition codes,
// but they are different from CMP.
// FIXME: since we're doing a post-processing, use a pseudoinstr here, so
// lowering & isel wouldn't diverge.
bool andCC = false;
if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
if (RHSC->isNullValue() && LHS.hasOneUse() &&
(LHS.getOpcode() == ISD::AND ||
(LHS.getOpcode() == ISD::TRUNCATE &&
LHS.getOperand(0).getOpcode() == ISD::AND))) {
andCC = true;
}
}
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
SDValue TargetCC;
SDValue Flag = EmitCMP(LHS, RHS, TargetCC, CC, dl, DAG);
// Get the condition codes directly from the status register, if its easy.
// Otherwise a branch will be generated. Note that the AND and BIT
// instructions generate different flags than CMP, the carry bit can be used
// for NE/EQ.
bool Invert = false;
bool Shift = false;
bool Convert = true;
switch (cast<ConstantSDNode>(TargetCC)->getZExtValue()) {
default:
Convert = false;
break;
case MSP430CC::COND_HS:
// Res = SRW & 1, no processing is required
break;
case MSP430CC::COND_LO:
// Res = ~(SRW & 1)
Invert = true;
break;
case MSP430CC::COND_NE:
if (andCC) {
// C = ~Z, thus Res = SRW & 1, no processing is required
} else {
// Res = ~((SRW >> 1) & 1)
Shift = true;
Invert = true;
}
break;
case MSP430CC::COND_E:
Shift = true;
// C = ~Z for AND instruction, thus we can put Res = ~(SRW & 1), however,
// Res = (SRW >> 1) & 1 is 1 word shorter.
break;
}
EVT VT = Op.getValueType();
SDValue One = DAG.getConstant(1, VT);
if (Convert) {
SDValue SR = DAG.getCopyFromReg(DAG.getEntryNode(), dl, MSP430::SRW,
MVT::i16, Flag);
if (Shift)
// FIXME: somewhere this is turned into a SRL, lower it MSP specific?
SR = DAG.getNode(ISD::SRA, dl, MVT::i16, SR, One);
SR = DAG.getNode(ISD::AND, dl, MVT::i16, SR, One);
if (Invert)
SR = DAG.getNode(ISD::XOR, dl, MVT::i16, SR, One);
return SR;
} else {
SDValue Zero = DAG.getConstant(0, VT);
SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
SmallVector<SDValue, 4> Ops;
Ops.push_back(One);
Ops.push_back(Zero);
Ops.push_back(TargetCC);
Ops.push_back(Flag);
return DAG.getNode(MSP430ISD::SELECT_CC, dl, VTs, &Ops[0], Ops.size());
}
}
SDValue
Cpu0TargetLowering::LowerCall(SDValue InChain, SDValue Callee,
CallingConv::ID CallConv, bool isVarArg,
bool doesNotRet, bool &isTailCall,
const SmallVectorImpl<ISD::OutputArg> &Outs,
const SmallVectorImpl<SDValue> &OutVals,
const SmallVectorImpl<ISD::InputArg> &Ins,
DebugLoc dl, SelectionDAG &DAG,
SmallVectorImpl<SDValue> &InVals) const {
#if 1
// Cpu0 target does not yet support tail call optimization.
isTailCall = false;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
Cpu0FunctionInfo *Cpu0FI = MF.getInfo<Cpu0FunctionInfo>();
// Analyze operands of the call, assigning locations to each operand.
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
getTargetMachine(), ArgLocs, *DAG.getContext());
CCInfo.AnalyzeCallOperands(Outs, CC_Cpu0);
// Get a count of how many bytes are to be pushed on the stack.
unsigned NextStackOffset = CCInfo.getNextStackOffset();
// Chain is the output chain of the last Load/Store or CopyToReg node.
// ByValChain is the output chain of the last Memcpy node created for copying
// byval arguments to the stack.
SDValue Chain, CallSeqStart, ByValChain;
SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
Chain = CallSeqStart = DAG.getCALLSEQ_START(InChain, NextStackOffsetVal);
ByValChain = InChain;
#if 0
// If this is the first call, create a stack frame object that points to
// a location to which .cprestore saves $gp.
if (IsO32 && IsPIC && Cpu0FI->globalBaseRegFixed() && !Cpu0FI->getGPFI())
Cpu0FI->setGPFI(MFI->CreateFixedObject(4, 0, true));
#endif
// Get the frame index of the stack frame object that points to the location
// of dynamically allocated area on the stack.
int DynAllocFI = Cpu0FI->getDynAllocFI();
#if 0
// Update size of the maximum argument space.
// For O32, a minimum of four words (16 bytes) of argument space is
// allocated.
if (IsO32)
NextStackOffset = std::max(NextStackOffset, (unsigned)16);
#endif
unsigned MaxCallFrameSize = Cpu0FI->getMaxCallFrameSize();
if (MaxCallFrameSize < NextStackOffset) {
Cpu0FI->setMaxCallFrameSize(NextStackOffset);
// Set the offsets relative to $sp of the $gp restore slot and dynamically
// allocated stack space. These offsets must be aligned to a boundary
// determined by the stack alignment of the ABI.
unsigned StackAlignment = TFL->getStackAlignment();
NextStackOffset = (NextStackOffset + StackAlignment - 1) /
StackAlignment * StackAlignment;
if (Cpu0FI->needGPSaveRestore())
MFI->setObjectOffset(Cpu0FI->getGPFI(), NextStackOffset);
MFI->setObjectOffset(DynAllocFI, NextStackOffset);
}
// With EABI is it possible to have 16 args on registers.
SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass;
SmallVector<SDValue, 8> MemOpChains;
int FirstFI = -MFI->getNumFixedObjects() - 1, LastFI = 0;
// Walk the register/memloc assignments, inserting copies/loads.
for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
SDValue Arg = OutVals[i];
CCValAssign &VA = ArgLocs[i];
MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
ISD::ArgFlagsTy Flags = Outs[i].Flags;
// ByVal Arg.
if (Flags.isByVal()) {
assert(Flags.getByValSize() &&
"ByVal args of size 0 should have been ignored by front-end.");
#if 0
if (IsO32)
WriteByValArg(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI,
MFI, DAG, Arg, VA, Flags, getPointerTy(),
Subtarget->isLittle());
#endif
#if 0
else
PassByValArg64(ByValChain, Chain, dl, RegsToPass, MemOpChains, LastFI,
MFI, DAG, Arg, VA, Flags, getPointerTy(),
Subtarget->isLittle());
#endif
continue;
}
// Promote the value if needed.
switch (VA.getLocInfo()) {
default: llvm_unreachable("Unknown loc info!");
case CCValAssign::Full:
#if 0
if (VA.isRegLoc()) {
if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
(ValVT == MVT::f64 && LocVT == MVT::i64))
Arg = DAG.getNode(ISD::BITCAST, dl, LocVT, Arg);
else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
SDValue Lo = DAG.getNode(Cpu0ISD::ExtractElementF64, dl, MVT::i32,
Arg, DAG.getConstant(0, MVT::i32));
SDValue Hi = DAG.getNode(Cpu0ISD::ExtractElementF64, dl, MVT::i32,
Arg, DAG.getConstant(1, MVT::i32));
if (!Subtarget->isLittle())
std::swap(Lo, Hi);
unsigned LocRegLo = VA.getLocReg();
unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
continue;
}
}
#else
assert("CCValAssign::Full:"); // Gamma debug
#endif
break;
case CCValAssign::SExt:
Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, LocVT, Arg);
break;
case CCValAssign::ZExt:
Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, LocVT, Arg);
break;
case CCValAssign::AExt:
Arg = DAG.getNode(ISD::ANY_EXTEND, dl, LocVT, Arg);
break;
}
// Arguments that can be passed on register must be kept at
// RegsToPass vector
if (VA.isRegLoc()) {
RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
continue;
}
// Register can't get to this point...
assert(VA.isMemLoc());
// Create the frame index object for this incoming parameter
LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
VA.getLocMemOffset(), true);
SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy());
// emit ISD::STORE whichs stores the
// parameter value to a stack Location
MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
MachinePointerInfo(), false, false, 0));
}
// Extend range of indices of frame objects for outgoing arguments that were
// created during this function call. Skip this step if no such objects were
// created.
if (LastFI)
Cpu0FI->extendOutArgFIRange(FirstFI, LastFI);
// If a memcpy has been created to copy a byval arg to a stack, replace the
// chain input of CallSeqStart with ByValChain.
if (InChain != ByValChain)
DAG.UpdateNodeOperands(CallSeqStart.getNode(), ByValChain,
NextStackOffsetVal);
// Transform all store nodes into one single node because all store
// nodes are independent of each other.
if (!MemOpChains.empty())
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
&MemOpChains[0], MemOpChains.size());
// If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
// direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
// node so that legalize doesn't hack it.
unsigned char OpFlag;
#if 0 // cpu0 int 32 only
bool IsPICCall = (IsN64 || IsPIC); // true if calls are translated to jalr $25
#else
bool IsPICCall = IsPIC; // true if calls are translated to jalr $25
#endif
bool GlobalOrExternal = false;
SDValue CalleeLo;
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
if (IsPICCall && G->getGlobal()->hasInternalLinkage()) {
OpFlag = Cpu0II::MO_GOT;
#if 0
unsigned char LoFlag = IsO32 ? Cpu0II::MO_ABS_LO : Cpu0II::MO_GOT_OFST;
#else
unsigned char LoFlag = Cpu0II::MO_ABS_LO;
#endif
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(), 0,
OpFlag);
CalleeLo = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(),
0, LoFlag);
} else {
OpFlag = IsPICCall ? Cpu0II::MO_GOT_CALL : Cpu0II::MO_NO_FLAG;
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
getPointerTy(), 0, OpFlag);
}
GlobalOrExternal = true;
}
else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
if (!IsPIC) // static
OpFlag = Cpu0II::MO_NO_FLAG;
else // O32 & PIC
OpFlag = Cpu0II::MO_GOT_CALL;
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
OpFlag);
GlobalOrExternal = true;
}
SDValue InFlag;
// Create nodes that load address of callee and copy it to T9
if (IsPICCall) {
if (GlobalOrExternal) {
// Load callee address
Callee = DAG.getNode(Cpu0ISD::Wrapper, dl, getPointerTy(),
GetGlobalReg(DAG, getPointerTy()), Callee);
SDValue LoadValue = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
Callee, MachinePointerInfo::getGOT(),
false, false, false, 0);
// Use GOT+LO if callee has internal linkage.
if (CalleeLo.getNode()) {
SDValue Lo = DAG.getNode(Cpu0ISD::Lo, dl, getPointerTy(), CalleeLo);
Callee = DAG.getNode(ISD::ADD, dl, getPointerTy(), LoadValue, Lo);
} else
Callee = LoadValue;
}
}
// T9 should contain the address of the callee function if
// -reloction-model=pic or it is an indirect call.
if (IsPICCall || !GlobalOrExternal) {
// copy to T9
unsigned T9Reg = Cpu0::T9;
Chain = DAG.getCopyToReg(Chain, dl, T9Reg, Callee, SDValue(0, 0));
InFlag = Chain.getValue(1);
Callee = DAG.getRegister(T9Reg, getPointerTy());
}
// Build a sequence of copy-to-reg nodes chained together with token
// chain and flag operands which copy the outgoing args into registers.
// The InFlag in necessary since all emitted instructions must be
// stuck together.
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
RegsToPass[i].second, InFlag);
InFlag = Chain.getValue(1);
}
// Cpu0JmpLink = #chain, #target_address, #opt_in_flags...
// = Chain, Callee, Reg#1, Reg#2, ...
//
// Returns a chain & a flag for retval copy to use.
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
SmallVector<SDValue, 8> Ops;
Ops.push_back(Chain);
Ops.push_back(Callee);
// Add argument registers to the end of the list so that they are
// known live into the call.
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
Ops.push_back(DAG.getRegister(RegsToPass[i].first,
RegsToPass[i].second.getValueType()));
// Add a register mask operand representing the call-preserved registers.
const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
assert(Mask && "Missing call preserved mask for calling convention");
Ops.push_back(DAG.getRegisterMask(Mask));
if (InFlag.getNode())
Ops.push_back(InFlag);
Chain = DAG.getNode(Cpu0ISD::JmpLink, dl, NodeTys, &Ops[0], Ops.size());
InFlag = Chain.getValue(1);
// Create the CALLSEQ_END node.
Chain = DAG.getCALLSEQ_END(Chain,
DAG.getIntPtrConstant(NextStackOffset, true),
DAG.getIntPtrConstant(0, true), InFlag);
InFlag = Chain.getValue(1);
// Handle result values, copying them out of physregs into vregs that we
// return.
return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
Ins, dl, DAG, InVals);
#else
return InChain;
#endif
}