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[mips] Simplify lowering functions in MipsISelLowering.cpp by using t…
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…he helper

functions added in r168456.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168458 91177308-0d34-0410-b5e6-96231b3b80d8
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@ahatanak
ahatanak committed Nov 21, 2012
1 parent 6b28b80 commit d43e06d
Showing 1 changed file with 32 additions and 148 deletions.
180 changes: 32 additions & 148 deletions lib/Target/Mips/MipsISelLowering.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1812,80 +1812,36 @@ SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();

if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
SDVTList VTs = DAG.getVTList(MVT::i32);

const MipsTargetObjectFile &TLOF =
(const MipsTargetObjectFile&)getObjFileLowering();

// %gp_rel relocation
if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
MipsII::MO_GPREL);
SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, dl, VTs, &GA, 1);
SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, dl,
DAG.getVTList(MVT::i32), &GA, 1);
SDValue GPReg = DAG.getRegister(Mips::GP, MVT::i32);
return DAG.getNode(ISD::ADD, dl, MVT::i32, GPReg, GPRelNode);
}

// %hi/%lo relocation
SDValue GAHi = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
MipsII::MO_ABS_HI);
SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
MipsII::MO_ABS_LO);
SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, VTs, &GAHi, 1);
SDValue Lo = DAG.getNode(MipsISD::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 = HasMips64 ?
(HasGotOfst ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT_DISP) :
(HasGotOfst ? MipsII::MO_GOT : MipsII::MO_GOT16);
SDValue GA = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0, GotFlag);
GA = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), GA);
SDValue ResNode = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), GA,
MachinePointerInfo::getGOT(), 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,
HasMips64 ? MipsII::MO_GOT_OFST :
MipsII::MO_ABS_LO);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, GALo);
return DAG.getNode(ISD::ADD, dl, ValTy, ResNode, Lo);
return getAddrNonPIC(Op, DAG);
}

if (GV->hasInternalLinkage() || (GV->hasLocalLinkage() && !isa<Function>(GV)))
return getAddrLocal(Op, DAG, HasMips64);

return getAddrGlobal(Op, DAG,
HasMips64 ? MipsII::MO_GOT_DISP : MipsII::MO_GOT16);
}

SDValue MipsTargetLowering::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_ && !IsN64)
return getAddrNonPIC(Op, DAG);

if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
// %hi/%lo relocation
SDValue BAHi =
DAG.getTargetBlockAddress(BA, MVT::i32, 0, MipsII::MO_ABS_HI);
SDValue BALo =
DAG.getTargetBlockAddress(BA, MVT::i32, 0, MipsII::MO_ABS_LO);
SDValue Hi = DAG.getNode(MipsISD::Hi, dl, MVT::i32, BAHi);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALo);
return DAG.getNode(ISD::ADD, dl, MVT::i32, Hi, Lo);
}

EVT ValTy = Op.getValueType();
unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
SDValue BAGOTOffset = DAG.getTargetBlockAddress(BA, ValTy, 0, GOTFlag);
BAGOTOffset = DAG.getNode(MipsISD::Wrapper, dl, ValTy,
GetGlobalReg(DAG, ValTy), BAGOTOffset);
SDValue BALOOffset = DAG.getTargetBlockAddress(BA, ValTy, 0, OFSTFlag);
SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), BAGOTOffset,
MachinePointerInfo::getGOT(), false, false, false,
0);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, BALOOffset);
return DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
return getAddrLocal(Op, DAG, HasMips64);
}

SDValue MipsTargetLowering::
Expand Down Expand Up @@ -1972,41 +1928,15 @@ LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
SDValue MipsTargetLowering::
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 (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64)
return getAddrNonPIC(Op, DAG);

if (!IsPIC && !IsN64) {
JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_HI);
HiPart = DAG.getNode(MipsISD::Hi, dl, PtrVT, JTI);
JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_LO);
} else {// Emit Load from Global Pointer
unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
unsigned OfstFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, GOTFlag);
JTI = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
JTI);
HiPart = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), JTI,
MachinePointerInfo::getGOT(), false, false, false, 0);
JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, OfstFlag);
}

SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, JTILo);
return DAG.getNode(ISD::ADD, dl, PtrVT, HiPart, Lo);
return getAddrLocal(Op, DAG, HasMips64);
}

SDValue MipsTargetLowering::
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
Expand All @@ -2017,31 +1947,10 @@ LowerConstantPool(SDValue Op, SelectionDAG &DAG) const
// SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
// ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);

if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
SDValue CPHi = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
N->getOffset(), MipsII::MO_ABS_HI);
SDValue CPLo = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
N->getOffset(), MipsII::MO_ABS_LO);
SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, MVT::i32, CPHi);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, CPLo);
ResNode = DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
} else {
EVT ValTy = Op.getValueType();
unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
SDValue CP = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
N->getOffset(), GOTFlag);
CP = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), CP);
SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), CP,
MachinePointerInfo::getGOT(), false,
false, false, 0);
SDValue CPLo = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
N->getOffset(), OFSTFlag);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, CPLo);
ResNode = DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
}
if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64)
return getAddrNonPIC(Op, DAG);

return ResNode;
return getAddrLocal(Op, DAG, HasMips64);
}

SDValue MipsTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
Expand Down Expand Up @@ -2933,60 +2842,35 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
// 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;
bool IsPICCall = (IsN64 || IsPIC); // true if calls are translated to jalr $25
bool GlobalOrExternal = false;
SDValue CalleeLo;

if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
if (IsPICCall && G->getGlobal()->hasInternalLinkage()) {
OpFlag = IsO32 ? MipsII::MO_GOT : MipsII::MO_GOT_PAGE;
unsigned char LoFlag = IsO32 ? MipsII::MO_ABS_LO : MipsII::MO_GOT_OFST;
if (IsPICCall) {
if (G->getGlobal()->hasInternalLinkage())
Callee = getAddrLocal(Callee, DAG, HasMips64);
else
Callee = getAddrGlobal(Callee, DAG, MipsII::MO_GOT_CALL);
} else
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(), 0,
OpFlag);
CalleeLo = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(),
0, LoFlag);
} else {
OpFlag = IsPICCall ? MipsII::MO_GOT_CALL : MipsII::MO_NO_FLAG;
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
getPointerTy(), 0, OpFlag);
}

MipsII::MO_NO_FLAG);
GlobalOrExternal = true;
}
else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
if (IsN64 || (!IsO32 && IsPIC))
OpFlag = MipsII::MO_GOT_DISP;
Callee = getAddrGlobal(Callee, DAG, MipsII::MO_GOT_DISP);
else if (!IsPIC) // !N64 && static
OpFlag = MipsII::MO_NO_FLAG;
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
MipsII::MO_NO_FLAG);
else // O32 & PIC
OpFlag = MipsII::MO_GOT_CALL;
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
OpFlag);
Callee = getAddrGlobal(Callee, DAG, MipsII::MO_GOT_CALL);

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(MipsISD::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(MipsISD::Lo, dl, getPointerTy(), CalleeLo);
Callee = DAG.getNode(ISD::ADD, dl, getPointerTy(), LoadValue, Lo);
} else
Callee = LoadValue;
}
}

// T9 register operand.
SDValue T9;

Expand Down

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