X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FPowerPC%2FPPCISelDAGToDAG.cpp;h=e04d7e1bc359bb09c42b869d68acc4a6b95cc9ba;hb=c48b3bf31875d515aa7bcd26c6182b0ce75777f7;hp=cc4478b1c296bbb727e1a718b6ec51c4c0818362;hpb=c38c1d135cb9d617254c396c22949baca024dd35;p=oota-llvm.git diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp index cc4478b1c29..e04d7e1bc35 100644 --- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp +++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp @@ -12,9 +12,9 @@ // //===----------------------------------------------------------------------===// -#define DEBUG_TYPE "ppc-codegen" #include "PPC.h" #include "MCTargetDesc/PPCPredicates.h" +#include "PPCMachineFunctionInfo.h" #include "PPCTargetMachine.h" #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineInstrBuilder.h" @@ -27,6 +27,8 @@ #include "llvm/IR/GlobalValue.h" #include "llvm/IR/GlobalVariable.h" #include "llvm/IR/Intrinsics.h" +#include "llvm/IR/Module.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/MathExtras.h" @@ -34,6 +36,12 @@ #include "llvm/Target/TargetOptions.h" using namespace llvm; +#define DEBUG_TYPE "ppc-codegen" + +// FIXME: Remove this once the bug has been fixed! +cl::opt ANDIGlueBug("expose-ppc-andi-glue-bug", +cl::desc("expose the ANDI glue bug on PPC"), cl::Hidden); + namespace llvm { void initializePPCDAGToDAGISelPass(PassRegistry&); } @@ -45,29 +53,31 @@ namespace { /// class PPCDAGToDAGISel : public SelectionDAGISel { const PPCTargetMachine &TM; - const PPCTargetLowering &PPCLowering; - const PPCSubtarget &PPCSubTarget; + const PPCTargetLowering *PPCLowering; + const PPCSubtarget *PPCSubTarget; unsigned GlobalBaseReg; public: explicit PPCDAGToDAGISel(PPCTargetMachine &tm) - : SelectionDAGISel(tm), TM(tm), - PPCLowering(*TM.getTargetLowering()), - PPCSubTarget(*TM.getSubtargetImpl()) { + : SelectionDAGISel(tm), TM(tm), + PPCLowering(TM.getSubtargetImpl()->getTargetLowering()), + PPCSubTarget(TM.getSubtargetImpl()) { initializePPCDAGToDAGISelPass(*PassRegistry::getPassRegistry()); } - virtual bool runOnMachineFunction(MachineFunction &MF) { + bool runOnMachineFunction(MachineFunction &MF) override { // Make sure we re-emit a set of the global base reg if necessary GlobalBaseReg = 0; + PPCLowering = TM.getSubtargetImpl()->getTargetLowering(); + PPCSubTarget = TM.getSubtargetImpl(); SelectionDAGISel::runOnMachineFunction(MF); - if (!PPCSubTarget.isSVR4ABI()) + if (!PPCSubTarget->isSVR4ABI()) InsertVRSaveCode(MF); return true; } - virtual void PostprocessISelDAG(); + void PostprocessISelDAG() override; /// getI32Imm - Return a target constant with the specified value, of type /// i32. @@ -83,7 +93,7 @@ namespace { /// getSmallIPtrImm - Return a target constant of pointer type. inline SDValue getSmallIPtrImm(unsigned Imm) { - return CurDAG->getTargetConstant(Imm, PPCLowering.getPointerTy()); + return CurDAG->getTargetConstant(Imm, PPCLowering->getPointerTy()); } /// isRunOfOnes - Returns true iff Val consists of one contiguous run of 1s @@ -104,7 +114,7 @@ namespace { // Select - Convert the specified operand from a target-independent to a // target-specific node if it hasn't already been changed. - SDNode *Select(SDNode *N); + SDNode *Select(SDNode *N) override; SDNode *SelectBitfieldInsert(SDNode *N); @@ -116,7 +126,7 @@ namespace { /// a base register plus a signed 16-bit displacement [r+imm]. bool SelectAddrImm(SDValue N, SDValue &Disp, SDValue &Base) { - return PPCLowering.SelectAddressRegImm(N, Disp, Base, *CurDAG, false); + return PPCLowering->SelectAddressRegImm(N, Disp, Base, *CurDAG, false); } /// SelectAddrImmOffs - Return true if the operand is valid for a preinc @@ -136,20 +146,20 @@ namespace { /// represented as an indexed [r+r] operation. Returns false if it can /// be represented by [r+imm], which are preferred. bool SelectAddrIdx(SDValue N, SDValue &Base, SDValue &Index) { - return PPCLowering.SelectAddressRegReg(N, Base, Index, *CurDAG); + return PPCLowering->SelectAddressRegReg(N, Base, Index, *CurDAG); } /// SelectAddrIdxOnly - Given the specified addressed, force it to be /// represented as an indexed [r+r] operation. bool SelectAddrIdxOnly(SDValue N, SDValue &Base, SDValue &Index) { - return PPCLowering.SelectAddressRegRegOnly(N, Base, Index, *CurDAG); + return PPCLowering->SelectAddressRegRegOnly(N, Base, Index, *CurDAG); } /// SelectAddrImmX4 - Returns true if the address N can be represented by /// a base register plus a signed 16-bit displacement that is a multiple of 4. /// Suitable for use by STD and friends. bool SelectAddrImmX4(SDValue N, SDValue &Disp, SDValue &Base) { - return PPCLowering.SelectAddressRegImm(N, Disp, Base, *CurDAG, true); + return PPCLowering->SelectAddressRegImm(N, Disp, Base, *CurDAG, true); } // Select an address into a single register. @@ -163,16 +173,26 @@ namespace { /// a register. The case of adding a (possibly relocatable) constant to a /// register can be improved, but it is wrong to substitute Reg+Reg for /// Reg in an asm, because the load or store opcode would have to change. - virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op, - char ConstraintCode, - std::vector &OutOps) { - OutOps.push_back(Op); + bool SelectInlineAsmMemoryOperand(const SDValue &Op, + char ConstraintCode, + std::vector &OutOps) override { + // We need to make sure that this one operand does not end up in r0 + // (because we might end up lowering this as 0(%op)). + const TargetRegisterInfo *TRI = TM.getSubtargetImpl()->getRegisterInfo(); + const TargetRegisterClass *TRC = TRI->getPointerRegClass(*MF, /*Kind=*/1); + SDValue RC = CurDAG->getTargetConstant(TRC->getID(), MVT::i32); + SDValue NewOp = + SDValue(CurDAG->getMachineNode(TargetOpcode::COPY_TO_REGCLASS, + SDLoc(Op), Op.getValueType(), + Op, RC), 0); + + OutOps.push_back(NewOp); return false; } void InsertVRSaveCode(MachineFunction &MF); - virtual const char *getPassName() const { + const char *getPassName() const override { return "PowerPC DAG->DAG Pattern Instruction Selection"; } @@ -181,6 +201,12 @@ namespace { private: SDNode *SelectSETCC(SDNode *N); + + void PeepholePPC64(); + void PeepholeCROps(); + + bool AllUsersSelectZero(SDNode *N); + void SwapAllSelectUsers(SDNode *N); }; } @@ -218,7 +244,7 @@ void PPCDAGToDAGISel::InsertVRSaveCode(MachineFunction &Fn) { unsigned InVRSAVE = RegInfo->createVirtualRegister(&PPC::GPRCRegClass); unsigned UpdatedVRSAVE = RegInfo->createVirtualRegister(&PPC::GPRCRegClass); - const TargetInstrInfo &TII = *TM.getInstrInfo(); + const TargetInstrInfo &TII = *TM.getSubtargetImpl()->getInstrInfo(); MachineBasicBlock &EntryBB = *Fn.begin(); DebugLoc dl; // Emit the following code into the entry block: @@ -254,24 +280,42 @@ void PPCDAGToDAGISel::InsertVRSaveCode(MachineFunction &Fn) { /// SDNode *PPCDAGToDAGISel::getGlobalBaseReg() { if (!GlobalBaseReg) { - const TargetInstrInfo &TII = *TM.getInstrInfo(); + const TargetInstrInfo &TII = *TM.getSubtargetImpl()->getInstrInfo(); // Insert the set of GlobalBaseReg into the first MBB of the function MachineBasicBlock &FirstMBB = MF->front(); MachineBasicBlock::iterator MBBI = FirstMBB.begin(); + const Module *M = MF->getFunction()->getParent(); DebugLoc dl; - if (PPCLowering.getPointerTy() == MVT::i32) { - GlobalBaseReg = RegInfo->createVirtualRegister(&PPC::GPRCRegClass); - BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR)); - BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg); + if (PPCLowering->getPointerTy() == MVT::i32) { + if (PPCSubTarget->isTargetELF()) { + GlobalBaseReg = PPC::R30; + if (M->getPICLevel() == PICLevel::Small) { + BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MoveGOTtoLR)); + BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg); + } else { + BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR)); + BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg); + unsigned TempReg = RegInfo->createVirtualRegister(&PPC::GPRCRegClass); + BuildMI(FirstMBB, MBBI, dl, + TII.get(PPC::UpdateGBR)).addReg(GlobalBaseReg) + .addReg(TempReg, RegState::Define).addReg(GlobalBaseReg); + MF->getInfo()->setUsesPICBase(true); + } + } else { + GlobalBaseReg = + RegInfo->createVirtualRegister(&PPC::GPRC_NOR0RegClass); + BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR)); + BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR), GlobalBaseReg); + } } else { - GlobalBaseReg = RegInfo->createVirtualRegister(&PPC::G8RCRegClass); + GlobalBaseReg = RegInfo->createVirtualRegister(&PPC::G8RC_NOX0RegClass); BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MovePCtoLR8)); BuildMI(FirstMBB, MBBI, dl, TII.get(PPC::MFLR8), GlobalBaseReg); } } return CurDAG->getRegister(GlobalBaseReg, - PPCLowering.getPointerTy()).getNode(); + PPCLowering->getPointerTy()).getNode(); } /// isIntS16Immediate - This method tests to see if the node is either a 32-bit @@ -330,6 +374,9 @@ static bool isOpcWithIntImmediate(SDNode *N, unsigned Opc, unsigned& Imm) { } bool PPCDAGToDAGISel::isRunOfOnes(unsigned Val, unsigned &MB, unsigned &ME) { + if (!Val) + return false; + if (isShiftedMask_32(Val)) { // look for the first non-zero bit MB = countLeadingZeros(Val); @@ -400,8 +447,8 @@ SDNode *PPCDAGToDAGISel::SelectBitfieldInsert(SDNode *N) { SDLoc dl(N); APInt LKZ, LKO, RKZ, RKO; - CurDAG->ComputeMaskedBits(Op0, LKZ, LKO); - CurDAG->ComputeMaskedBits(Op1, RKZ, RKO); + CurDAG->computeKnownBits(Op0, LKZ, LKO); + CurDAG->computeKnownBits(Op1, RKZ, RKO); unsigned TargetMask = LKZ.getZExtValue(); unsigned InsertMask = RKZ.getZExtValue(); @@ -435,7 +482,7 @@ SDNode *PPCDAGToDAGISel::SelectBitfieldInsert(SDNode *N) { } unsigned MB, ME; - if (InsertMask && isRunOfOnes(InsertMask, MB, ME)) { + if (isRunOfOnes(InsertMask, MB, ME)) { SDValue Tmp1, Tmp2; if ((Op1Opc == ISD::SHL || Op1Opc == ISD::SRL) && @@ -444,11 +491,18 @@ SDNode *PPCDAGToDAGISel::SelectBitfieldInsert(SDNode *N) { SH = (Op1Opc == ISD::SHL) ? Value : 32 - Value; } if (Op1Opc == ISD::AND) { + // The AND mask might not be a constant, and we need to make sure that + // if we're going to fold the masking with the insert, all bits not + // know to be zero in the mask are known to be one. + APInt MKZ, MKO; + CurDAG->computeKnownBits(Op1.getOperand(1), MKZ, MKO); + bool CanFoldMask = InsertMask == MKO.getZExtValue(); + unsigned SHOpc = Op1.getOperand(0).getOpcode(); - if ((SHOpc == ISD::SHL || SHOpc == ISD::SRL) && + if ((SHOpc == ISD::SHL || SHOpc == ISD::SRL) && CanFoldMask && isInt32Immediate(Op1.getOperand(0).getOperand(1), Value)) { - // Note that Value must be in range here (less than 32) because - // otherwise there would not be any bits set in InsertMask. + // Note that Value must be in range here (less than 32) because + // otherwise there would not be any bits set in InsertMask. Op1 = Op1.getOperand(0).getOperand(0); SH = (SHOpc == ISD::SHL) ? Value : 32 - Value; } @@ -460,7 +514,7 @@ SDNode *PPCDAGToDAGISel::SelectBitfieldInsert(SDNode *N) { return CurDAG->getMachineNode(PPC::RLWIMI, dl, MVT::i32, Ops); } } - return 0; + return nullptr; } /// SelectCC - Select a comparison of the specified values with the specified @@ -558,7 +612,7 @@ SDValue PPCDAGToDAGISel::SelectCC(SDValue LHS, SDValue RHS, Opc = PPC::FCMPUS; } else { assert(LHS.getValueType() == MVT::f64 && "Unknown vt!"); - Opc = PPC::FCMPUD; + Opc = PPCSubTarget->hasVSX() ? PPC::XSCMPUDP : PPC::FCMPUD; } return SDValue(CurDAG->getMachineNode(Opc, dl, MVT::i32, LHS, RHS), 0); } @@ -594,12 +648,8 @@ static PPC::Predicate getPredicateForSetCC(ISD::CondCode CC) { /// getCRIdxForSetCC - Return the index of the condition register field /// associated with the SetCC condition, and whether or not the field is /// treated as inverted. That is, lt = 0; ge = 0 inverted. -/// -/// If this returns with Other != -1, then the returned comparison is an or of -/// two simpler comparisons. In this case, Invert is guaranteed to be false. -static unsigned getCRIdxForSetCC(ISD::CondCode CC, bool &Invert, int &Other) { +static unsigned getCRIdxForSetCC(ISD::CondCode CC, bool &Invert) { Invert = false; - Other = -1; switch (CC) { default: llvm_unreachable("Unknown condition!"); case ISD::SETOLT: @@ -630,85 +680,108 @@ static unsigned getCRIdxForSetCC(ISD::CondCode CC, bool &Invert, int &Other) { // getVCmpInst: return the vector compare instruction for the specified // vector type and condition code. Since this is for altivec specific code, // only support the altivec types (v16i8, v8i16, v4i32, and v4f32). -static unsigned int getVCmpInst(MVT::SimpleValueType VecVT, ISD::CondCode CC) { - switch (CC) { - case ISD::SETEQ: - case ISD::SETUEQ: - case ISD::SETNE: - case ISD::SETUNE: - if (VecVT == MVT::v16i8) - return PPC::VCMPEQUB; - else if (VecVT == MVT::v8i16) - return PPC::VCMPEQUH; - else if (VecVT == MVT::v4i32) - return PPC::VCMPEQUW; - // v4f32 != v4f32 could be translate to unordered not equal - else if (VecVT == MVT::v4f32) - return PPC::VCMPEQFP; - break; - case ISD::SETLT: - case ISD::SETGT: - case ISD::SETLE: - case ISD::SETGE: - if (VecVT == MVT::v16i8) - return PPC::VCMPGTSB; - else if (VecVT == MVT::v8i16) - return PPC::VCMPGTSH; - else if (VecVT == MVT::v4i32) - return PPC::VCMPGTSW; - else if (VecVT == MVT::v4f32) - return PPC::VCMPGTFP; - break; - case ISD::SETULT: - case ISD::SETUGT: - case ISD::SETUGE: - case ISD::SETULE: - if (VecVT == MVT::v16i8) - return PPC::VCMPGTUB; - else if (VecVT == MVT::v8i16) - return PPC::VCMPGTUH; - else if (VecVT == MVT::v4i32) - return PPC::VCMPGTUW; - break; - case ISD::SETOEQ: - if (VecVT == MVT::v4f32) - return PPC::VCMPEQFP; - break; - case ISD::SETOLT: - case ISD::SETOGT: - case ISD::SETOLE: - if (VecVT == MVT::v4f32) - return PPC::VCMPGTFP; - break; - case ISD::SETOGE: - if (VecVT == MVT::v4f32) - return PPC::VCMPGEFP; - break; - default: - break; - } - llvm_unreachable("Invalid integer vector compare condition"); -} +static unsigned int getVCmpInst(MVT VecVT, ISD::CondCode CC, + bool HasVSX, bool &Swap, bool &Negate) { + Swap = false; + Negate = false; -// getVCmpEQInst: return the equal compare instruction for the specified vector -// type. Since this is for altivec specific code, only support the altivec -// types (v16i8, v8i16, v4i32, and v4f32). -static unsigned int getVCmpEQInst(MVT::SimpleValueType VecVT) { - switch (VecVT) { - case MVT::v16i8: - return PPC::VCMPEQUB; - case MVT::v8i16: - return PPC::VCMPEQUH; - case MVT::v4i32: - return PPC::VCMPEQUW; - case MVT::v4f32: - return PPC::VCMPEQFP; - default: - llvm_unreachable("Invalid integer vector compare condition"); + if (VecVT.isFloatingPoint()) { + /* Handle some cases by swapping input operands. */ + switch (CC) { + case ISD::SETLE: CC = ISD::SETGE; Swap = true; break; + case ISD::SETLT: CC = ISD::SETGT; Swap = true; break; + case ISD::SETOLE: CC = ISD::SETOGE; Swap = true; break; + case ISD::SETOLT: CC = ISD::SETOGT; Swap = true; break; + case ISD::SETUGE: CC = ISD::SETULE; Swap = true; break; + case ISD::SETUGT: CC = ISD::SETULT; Swap = true; break; + default: break; + } + /* Handle some cases by negating the result. */ + switch (CC) { + case ISD::SETNE: CC = ISD::SETEQ; Negate = true; break; + case ISD::SETUNE: CC = ISD::SETOEQ; Negate = true; break; + case ISD::SETULE: CC = ISD::SETOGT; Negate = true; break; + case ISD::SETULT: CC = ISD::SETOGE; Negate = true; break; + default: break; + } + /* We have instructions implementing the remaining cases. */ + switch (CC) { + case ISD::SETEQ: + case ISD::SETOEQ: + if (VecVT == MVT::v4f32) + return HasVSX ? PPC::XVCMPEQSP : PPC::VCMPEQFP; + else if (VecVT == MVT::v2f64) + return PPC::XVCMPEQDP; + break; + case ISD::SETGT: + case ISD::SETOGT: + if (VecVT == MVT::v4f32) + return HasVSX ? PPC::XVCMPGTSP : PPC::VCMPGTFP; + else if (VecVT == MVT::v2f64) + return PPC::XVCMPGTDP; + break; + case ISD::SETGE: + case ISD::SETOGE: + if (VecVT == MVT::v4f32) + return HasVSX ? PPC::XVCMPGESP : PPC::VCMPGEFP; + else if (VecVT == MVT::v2f64) + return PPC::XVCMPGEDP; + break; + default: + break; + } + llvm_unreachable("Invalid floating-point vector compare condition"); + } else { + /* Handle some cases by swapping input operands. */ + switch (CC) { + case ISD::SETGE: CC = ISD::SETLE; Swap = true; break; + case ISD::SETLT: CC = ISD::SETGT; Swap = true; break; + case ISD::SETUGE: CC = ISD::SETULE; Swap = true; break; + case ISD::SETULT: CC = ISD::SETUGT; Swap = true; break; + default: break; + } + /* Handle some cases by negating the result. */ + switch (CC) { + case ISD::SETNE: CC = ISD::SETEQ; Negate = true; break; + case ISD::SETUNE: CC = ISD::SETUEQ; Negate = true; break; + case ISD::SETLE: CC = ISD::SETGT; Negate = true; break; + case ISD::SETULE: CC = ISD::SETUGT; Negate = true; break; + default: break; + } + /* We have instructions implementing the remaining cases. */ + switch (CC) { + case ISD::SETEQ: + case ISD::SETUEQ: + if (VecVT == MVT::v16i8) + return PPC::VCMPEQUB; + else if (VecVT == MVT::v8i16) + return PPC::VCMPEQUH; + else if (VecVT == MVT::v4i32) + return PPC::VCMPEQUW; + break; + case ISD::SETGT: + if (VecVT == MVT::v16i8) + return PPC::VCMPGTSB; + else if (VecVT == MVT::v8i16) + return PPC::VCMPGTSH; + else if (VecVT == MVT::v4i32) + return PPC::VCMPGTSW; + break; + case ISD::SETUGT: + if (VecVT == MVT::v16i8) + return PPC::VCMPGTUB; + else if (VecVT == MVT::v8i16) + return PPC::VCMPGTUH; + else if (VecVT == MVT::v4i32) + return PPC::VCMPGTUW; + break; + default: + break; + } + llvm_unreachable("Invalid integer vector compare condition"); } } - SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { SDLoc dl(N); unsigned Imm; @@ -716,7 +789,8 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { EVT PtrVT = CurDAG->getTargetLoweringInfo().getPointerTy(); bool isPPC64 = (PtrVT == MVT::i64); - if (isInt32Immediate(N->getOperand(1), Imm)) { + if (!PPCSubTarget->useCRBits() && + isInt32Immediate(N->getOperand(1), Imm)) { // We can codegen setcc op, imm very efficiently compared to a brcond. // Check for those cases here. // setcc op, 0 @@ -727,7 +801,7 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { case ISD::SETEQ: { Op = SDValue(CurDAG->getMachineNode(PPC::CNTLZW, dl, MVT::i32, Op), 0); SDValue Ops[] = { Op, getI32Imm(27), getI32Imm(5), getI32Imm(31) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } case ISD::SETNE: { if (isPPC64) break; @@ -739,14 +813,14 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { } case ISD::SETLT: { SDValue Ops[] = { Op, getI32Imm(1), getI32Imm(31), getI32Imm(31) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } case ISD::SETGT: { SDValue T = SDValue(CurDAG->getMachineNode(PPC::NEG, dl, MVT::i32, Op), 0); T = SDValue(CurDAG->getMachineNode(PPC::ANDC, dl, MVT::i32, T, Op), 0); SDValue Ops[] = { T, getI32Imm(1), getI32Imm(31), getI32Imm(31) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } } } else if (Imm == ~0U) { // setcc op, -1 @@ -776,7 +850,7 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { SDValue AN = SDValue(CurDAG->getMachineNode(PPC::AND, dl, MVT::i32, AD, Op), 0); SDValue Ops[] = { AN, getI32Imm(1), getI32Imm(31), getI32Imm(31) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } case ISD::SETGT: { SDValue Ops[] = { Op, getI32Imm(1), getI32Imm(31), getI32Imm(31) }; @@ -796,98 +870,49 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { // vector compare operations return the same type as the operands. if (LHS.getValueType().isVector()) { EVT VecVT = LHS.getValueType(); - MVT::SimpleValueType VT = VecVT.getSimpleVT().SimpleTy; - unsigned int VCmpInst = getVCmpInst(VT, CC); - - switch (CC) { - case ISD::SETEQ: - case ISD::SETOEQ: - case ISD::SETUEQ: - return CurDAG->SelectNodeTo(N, VCmpInst, VecVT, LHS, RHS); - case ISD::SETNE: - case ISD::SETONE: - case ISD::SETUNE: { - SDValue VCmp(CurDAG->getMachineNode(VCmpInst, dl, VecVT, LHS, RHS), 0); - return CurDAG->SelectNodeTo(N, PPC::VNOR, VecVT, VCmp, VCmp); - } - case ISD::SETLT: - case ISD::SETOLT: - case ISD::SETULT: - return CurDAG->SelectNodeTo(N, VCmpInst, VecVT, RHS, LHS); - case ISD::SETGT: - case ISD::SETOGT: - case ISD::SETUGT: - return CurDAG->SelectNodeTo(N, VCmpInst, VecVT, LHS, RHS); - case ISD::SETGE: - case ISD::SETOGE: - case ISD::SETUGE: { - // Small optimization: Altivec provides a 'Vector Compare Greater Than - // or Equal To' instruction (vcmpgefp), so in this case there is no - // need for extra logic for the equal compare. - if (VecVT.getSimpleVT().isFloatingPoint()) { - return CurDAG->SelectNodeTo(N, VCmpInst, VecVT, LHS, RHS); - } else { - SDValue VCmpGT(CurDAG->getMachineNode(VCmpInst, dl, VecVT, LHS, RHS), 0); - unsigned int VCmpEQInst = getVCmpEQInst(VT); - SDValue VCmpEQ(CurDAG->getMachineNode(VCmpEQInst, dl, VecVT, LHS, RHS), 0); - return CurDAG->SelectNodeTo(N, PPC::VOR, VecVT, VCmpGT, VCmpEQ); - } - } - case ISD::SETLE: - case ISD::SETOLE: - case ISD::SETULE: { - SDValue VCmpLE(CurDAG->getMachineNode(VCmpInst, dl, VecVT, RHS, LHS), 0); - unsigned int VCmpEQInst = getVCmpEQInst(VT); - SDValue VCmpEQ(CurDAG->getMachineNode(VCmpEQInst, dl, VecVT, LHS, RHS), 0); - return CurDAG->SelectNodeTo(N, PPC::VOR, VecVT, VCmpLE, VCmpEQ); - } - default: - llvm_unreachable("Invalid vector compare type: should be expanded by legalize"); + bool Swap, Negate; + unsigned int VCmpInst = getVCmpInst(VecVT.getSimpleVT(), CC, + PPCSubTarget->hasVSX(), Swap, Negate); + if (Swap) + std::swap(LHS, RHS); + + if (Negate) { + SDValue VCmp(CurDAG->getMachineNode(VCmpInst, dl, VecVT, LHS, RHS), 0); + return CurDAG->SelectNodeTo(N, PPCSubTarget->hasVSX() ? PPC::XXLNOR : + PPC::VNOR, + VecVT, VCmp, VCmp); } + + return CurDAG->SelectNodeTo(N, VCmpInst, VecVT, LHS, RHS); } + if (PPCSubTarget->useCRBits()) + return nullptr; + bool Inv; - int OtherCondIdx; - unsigned Idx = getCRIdxForSetCC(CC, Inv, OtherCondIdx); + unsigned Idx = getCRIdxForSetCC(CC, Inv); SDValue CCReg = SelectCC(LHS, RHS, CC, dl); SDValue IntCR; // Force the ccreg into CR7. SDValue CR7Reg = CurDAG->getRegister(PPC::CR7, MVT::i32); - SDValue InFlag(0, 0); // Null incoming flag value. + SDValue InFlag(nullptr, 0); // Null incoming flag value. CCReg = CurDAG->getCopyToReg(CurDAG->getEntryNode(), dl, CR7Reg, CCReg, InFlag).getValue(1); - if (PPCSubTarget.hasMFOCRF() && OtherCondIdx == -1) - IntCR = SDValue(CurDAG->getMachineNode(PPC::MFOCRF, dl, MVT::i32, CR7Reg, - CCReg), 0); - else - IntCR = SDValue(CurDAG->getMachineNode(PPC::MFCRpseud, dl, MVT::i32, - CR7Reg, CCReg), 0); + IntCR = SDValue(CurDAG->getMachineNode(PPC::MFOCRF, dl, MVT::i32, CR7Reg, + CCReg), 0); SDValue Ops[] = { IntCR, getI32Imm((32-(3-Idx)) & 31), getI32Imm(31), getI32Imm(31) }; - if (OtherCondIdx == -1 && !Inv) - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + if (!Inv) + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); // Get the specified bit. SDValue Tmp = SDValue(CurDAG->getMachineNode(PPC::RLWINM, dl, MVT::i32, Ops), 0); - if (Inv) { - assert(OtherCondIdx == -1 && "Can't have split plus negation"); - return CurDAG->SelectNodeTo(N, PPC::XORI, MVT::i32, Tmp, getI32Imm(1)); - } - - // Otherwise, we have to turn an operation like SETONE -> SETOLT | SETOGT. - // We already got the bit for the first part of the comparison (e.g. SETULE). - - // Get the other bit of the comparison. - Ops[1] = getI32Imm((32-(3-OtherCondIdx)) & 31); - SDValue OtherCond = - SDValue(CurDAG->getMachineNode(PPC::RLWINM, dl, MVT::i32, Ops), 0); - - return CurDAG->SelectNodeTo(N, PPC::OR, MVT::i32, Tmp, OtherCond); + return CurDAG->SelectNodeTo(N, PPC::XORI, MVT::i32, Tmp, getI32Imm(1)); } @@ -895,8 +920,17 @@ SDNode *PPCDAGToDAGISel::SelectSETCC(SDNode *N) { // target-specific node if it hasn't already been changed. SDNode *PPCDAGToDAGISel::Select(SDNode *N) { SDLoc dl(N); - if (N->isMachineOpcode()) - return NULL; // Already selected. + if (N->isMachineOpcode()) { + N->setNodeId(-1); + return nullptr; // Already selected. + } + + // In case any misguided DAG-level optimizations form an ADD with a + // TargetConstant operand, crash here instead of miscompiling (by selecting + // an r+r add instead of some kind of r+i add). + if (N->getOpcode() == ISD::ADD && + N->getOperand(1).getOpcode() == ISD::TargetConstant) + llvm_unreachable("Invalid ADD with TargetConstant operand"); switch (N->getOpcode()) { default: break; @@ -976,8 +1010,12 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { break; } - case ISD::SETCC: - return SelectSETCC(N); + case ISD::SETCC: { + SDNode *SN = SelectSETCC(N); + if (SN) + return SN; + break; + } case PPCISD::GlobalBaseReg: return getGlobalBaseReg(); @@ -992,15 +1030,15 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { getSmallIPtrImm(0)); } - case PPCISD::MFCR: { + case PPCISD::MFOCRF: { SDValue InFlag = N->getOperand(1); - // Use MFOCRF if supported. - if (PPCSubTarget.hasMFOCRF()) - return CurDAG->getMachineNode(PPC::MFOCRF, dl, MVT::i32, - N->getOperand(0), InFlag); - else - return CurDAG->getMachineNode(PPC::MFCRpseud, dl, MVT::i32, - N->getOperand(0), InFlag); + return CurDAG->getMachineNode(PPC::MFOCRF, dl, MVT::i32, + N->getOperand(0), InFlag); + } + + case PPCISD::READ_TIME_BASE: { + return CurDAG->getMachineNode(PPC::ReadTB, dl, MVT::i32, MVT::i32, + MVT::Other, N->getOperand(0)); } case ISD::SDIV: { @@ -1078,7 +1116,7 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { SDValue Base = LD->getBasePtr(); SDValue Ops[] = { Offset, Base, Chain }; return CurDAG->getMachineNode(Opcode, dl, LD->getValueType(0), - PPCLowering.getPointerTy(), + PPCLowering->getPointerTy(), MVT::Other, Ops); } else { unsigned Opcode; @@ -1113,7 +1151,7 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { SDValue Base = LD->getBasePtr(); SDValue Ops[] = { Base, Offset, Chain }; return CurDAG->getMachineNode(Opcode, dl, LD->getValueType(0), - PPCLowering.getPointerTy(), + PPCLowering->getPointerTy(), MVT::Other, Ops); } } @@ -1128,7 +1166,7 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { isRotateAndMask(N->getOperand(0).getNode(), Imm, false, SH, MB, ME)) { SDValue Val = N->getOperand(0).getOperand(0); SDValue Ops[] = { Val, getI32Imm(SH), getI32Imm(MB), getI32Imm(ME) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } // If this is just a masked value where the input is not handled above, and // is not a rotate-left (handled by a pattern in the .td file), emit rlwinm @@ -1137,20 +1175,34 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { N->getOperand(0).getOpcode() != ISD::ROTL) { SDValue Val = N->getOperand(0); SDValue Ops[] = { Val, getI32Imm(0), getI32Imm(MB), getI32Imm(ME) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } // If this is a 64-bit zero-extension mask, emit rldicl. if (isInt64Immediate(N->getOperand(1).getNode(), Imm64) && isMask_64(Imm64)) { SDValue Val = N->getOperand(0); MB = 64 - CountTrailingOnes_64(Imm64); - SDValue Ops[] = { Val, getI32Imm(0), getI32Imm(MB) }; - return CurDAG->SelectNodeTo(N, PPC::RLDICL, MVT::i64, Ops, 3); + SH = 0; + + // If the operand is a logical right shift, we can fold it into this + // instruction: rldicl(rldicl(x, 64-n, n), 0, mb) -> rldicl(x, 64-n, mb) + // for n <= mb. The right shift is really a left rotate followed by a + // mask, and this mask is a more-restrictive sub-mask of the mask implied + // by the shift. + if (Val.getOpcode() == ISD::SRL && + isInt32Immediate(Val.getOperand(1).getNode(), Imm) && Imm <= MB) { + assert(Imm < 64 && "Illegal shift amount"); + Val = Val.getOperand(0); + SH = 64 - Imm; + } + + SDValue Ops[] = { Val, getI32Imm(SH), getI32Imm(MB) }; + return CurDAG->SelectNodeTo(N, PPC::RLDICL, MVT::i64, Ops); } // AND X, 0 -> 0, not "rlwinm 32". if (isInt32Immediate(N->getOperand(1), Imm) && (Imm == 0)) { ReplaceUses(SDValue(N, 0), N->getOperand(1)); - return NULL; + return nullptr; } // ISD::OR doesn't get all the bitfield insertion fun. // (and (or x, c1), c2) where isRunOfOnes(~(c1^c2)) is a bitfield insert @@ -1183,7 +1235,7 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { isRotateAndMask(N, Imm, true, SH, MB, ME)) { SDValue Ops[] = { N->getOperand(0).getOperand(0), getI32Imm(SH), getI32Imm(MB), getI32Imm(ME) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } // Other cases are autogenerated. @@ -1195,17 +1247,45 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { isRotateAndMask(N, Imm, true, SH, MB, ME)) { SDValue Ops[] = { N->getOperand(0).getOperand(0), getI32Imm(SH), getI32Imm(MB), getI32Imm(ME) }; - return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32, Ops); } // Other cases are autogenerated. break; } + // FIXME: Remove this once the ANDI glue bug is fixed: + case PPCISD::ANDIo_1_EQ_BIT: + case PPCISD::ANDIo_1_GT_BIT: { + if (!ANDIGlueBug) + break; + + EVT InVT = N->getOperand(0).getValueType(); + assert((InVT == MVT::i64 || InVT == MVT::i32) && + "Invalid input type for ANDIo_1_EQ_BIT"); + + unsigned Opcode = (InVT == MVT::i64) ? PPC::ANDIo8 : PPC::ANDIo; + SDValue AndI(CurDAG->getMachineNode(Opcode, dl, InVT, MVT::Glue, + N->getOperand(0), + CurDAG->getTargetConstant(1, InVT)), 0); + SDValue CR0Reg = CurDAG->getRegister(PPC::CR0, MVT::i32); + SDValue SRIdxVal = + CurDAG->getTargetConstant(N->getOpcode() == PPCISD::ANDIo_1_EQ_BIT ? + PPC::sub_eq : PPC::sub_gt, MVT::i32); + + return CurDAG->SelectNodeTo(N, TargetOpcode::EXTRACT_SUBREG, MVT::i1, + CR0Reg, SRIdxVal, + SDValue(AndI.getNode(), 1) /* glue */); + } case ISD::SELECT_CC: { ISD::CondCode CC = cast(N->getOperand(4))->get(); EVT PtrVT = CurDAG->getTargetLoweringInfo().getPointerTy(); bool isPPC64 = (PtrVT == MVT::i64); + // If this is a select of i1 operands, we'll pattern match it. + if (PPCSubTarget->useCRBits() && + N->getOperand(0).getValueType() == MVT::i1) + break; + // Handle the setcc cases here. select_cc lhs, 0, 1, 0, cc if (!isPPC64) if (ConstantSDNode *N1C = dyn_cast(N->getOperand(1))) @@ -1224,6 +1304,36 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { } SDValue CCReg = SelectCC(N->getOperand(0), N->getOperand(1), CC, dl); + + if (N->getValueType(0) == MVT::i1) { + // An i1 select is: (c & t) | (!c & f). + bool Inv; + unsigned Idx = getCRIdxForSetCC(CC, Inv); + + unsigned SRI; + switch (Idx) { + default: llvm_unreachable("Invalid CC index"); + case 0: SRI = PPC::sub_lt; break; + case 1: SRI = PPC::sub_gt; break; + case 2: SRI = PPC::sub_eq; break; + case 3: SRI = PPC::sub_un; break; + } + + SDValue CCBit = CurDAG->getTargetExtractSubreg(SRI, dl, MVT::i1, CCReg); + + SDValue NotCCBit(CurDAG->getMachineNode(PPC::CRNOR, dl, MVT::i1, + CCBit, CCBit), 0); + SDValue C = Inv ? NotCCBit : CCBit, + NotC = Inv ? CCBit : NotCCBit; + + SDValue CAndT(CurDAG->getMachineNode(PPC::CRAND, dl, MVT::i1, + C, N->getOperand(2)), 0); + SDValue NotCAndF(CurDAG->getMachineNode(PPC::CRAND, dl, MVT::i1, + NotC, N->getOperand(3)), 0); + + return CurDAG->SelectNodeTo(N, PPC::CROR, MVT::i1, CAndT, NotCAndF); + } + unsigned BROpc = getPredicateForSetCC(CC); unsigned SelectCCOp; @@ -1234,22 +1344,72 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { else if (N->getValueType(0) == MVT::f32) SelectCCOp = PPC::SELECT_CC_F4; else if (N->getValueType(0) == MVT::f64) - SelectCCOp = PPC::SELECT_CC_F8; + if (PPCSubTarget->hasVSX()) + SelectCCOp = PPC::SELECT_CC_VSFRC; + else + SelectCCOp = PPC::SELECT_CC_F8; + else if (N->getValueType(0) == MVT::v2f64 || + N->getValueType(0) == MVT::v2i64) + SelectCCOp = PPC::SELECT_CC_VSRC; else SelectCCOp = PPC::SELECT_CC_VRRC; SDValue Ops[] = { CCReg, N->getOperand(2), N->getOperand(3), getI32Imm(BROpc) }; - return CurDAG->SelectNodeTo(N, SelectCCOp, N->getValueType(0), Ops, 4); + return CurDAG->SelectNodeTo(N, SelectCCOp, N->getValueType(0), Ops); } + case ISD::VSELECT: + if (PPCSubTarget->hasVSX()) { + SDValue Ops[] = { N->getOperand(2), N->getOperand(1), N->getOperand(0) }; + return CurDAG->SelectNodeTo(N, PPC::XXSEL, N->getValueType(0), Ops); + } + + break; + case ISD::VECTOR_SHUFFLE: + if (PPCSubTarget->hasVSX() && (N->getValueType(0) == MVT::v2f64 || + N->getValueType(0) == MVT::v2i64)) { + ShuffleVectorSDNode *SVN = cast(N); + + SDValue Op1 = N->getOperand(SVN->getMaskElt(0) < 2 ? 0 : 1), + Op2 = N->getOperand(SVN->getMaskElt(1) < 2 ? 0 : 1); + unsigned DM[2]; + + for (int i = 0; i < 2; ++i) + if (SVN->getMaskElt(i) <= 0 || SVN->getMaskElt(i) == 2) + DM[i] = 0; + else + DM[i] = 1; + + SDValue DMV = CurDAG->getTargetConstant(DM[1] | (DM[0] << 1), MVT::i32); + + if (Op1 == Op2 && DM[0] == 0 && DM[1] == 0 && + Op1.getOpcode() == ISD::SCALAR_TO_VECTOR && + isa(Op1.getOperand(0))) { + LoadSDNode *LD = cast(Op1.getOperand(0)); + SDValue Base, Offset; + + if (LD->isUnindexed() && + SelectAddrIdxOnly(LD->getBasePtr(), Base, Offset)) { + SDValue Chain = LD->getChain(); + SDValue Ops[] = { Base, Offset, Chain }; + return CurDAG->SelectNodeTo(N, PPC::LXVDSX, + N->getValueType(0), Ops); + } + } + + SDValue Ops[] = { Op1, Op2, DMV }; + return CurDAG->SelectNodeTo(N, PPC::XXPERMDI, N->getValueType(0), Ops); + } + + break; case PPCISD::BDNZ: case PPCISD::BDZ: { - bool IsPPC64 = PPCSubTarget.isPPC64(); + bool IsPPC64 = PPCSubTarget->isPPC64(); SDValue Ops[] = { N->getOperand(1), N->getOperand(0) }; return CurDAG->SelectNodeTo(N, N->getOpcode() == PPCISD::BDNZ ? (IsPPC64 ? PPC::BDNZ8 : PPC::BDNZ) : (IsPPC64 ? PPC::BDZ8 : PPC::BDZ), - MVT::Other, Ops, 2); + MVT::Other, Ops); } case PPCISD::COND_BRANCH: { // Op #0 is the Chain. @@ -1262,14 +1422,36 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { getI32Imm(cast(N->getOperand(1))->getZExtValue()); SDValue Ops[] = { Pred, N->getOperand(2), N->getOperand(3), N->getOperand(0), N->getOperand(4) }; - return CurDAG->SelectNodeTo(N, PPC::BCC, MVT::Other, Ops, 5); + return CurDAG->SelectNodeTo(N, PPC::BCC, MVT::Other, Ops); } case ISD::BR_CC: { ISD::CondCode CC = cast(N->getOperand(1))->get(); + unsigned PCC = getPredicateForSetCC(CC); + + if (N->getOperand(2).getValueType() == MVT::i1) { + unsigned Opc; + bool Swap; + switch (PCC) { + default: llvm_unreachable("Unexpected Boolean-operand predicate"); + case PPC::PRED_LT: Opc = PPC::CRANDC; Swap = true; break; + case PPC::PRED_LE: Opc = PPC::CRORC; Swap = true; break; + case PPC::PRED_EQ: Opc = PPC::CREQV; Swap = false; break; + case PPC::PRED_GE: Opc = PPC::CRORC; Swap = false; break; + case PPC::PRED_GT: Opc = PPC::CRANDC; Swap = false; break; + case PPC::PRED_NE: Opc = PPC::CRXOR; Swap = false; break; + } + + SDValue BitComp(CurDAG->getMachineNode(Opc, dl, MVT::i1, + N->getOperand(Swap ? 3 : 2), + N->getOperand(Swap ? 2 : 3)), 0); + return CurDAG->SelectNodeTo(N, PPC::BC, MVT::Other, + BitComp, N->getOperand(4), N->getOperand(0)); + } + SDValue CondCode = SelectCC(N->getOperand(2), N->getOperand(3), CC, dl); - SDValue Ops[] = { getI32Imm(getPredicateForSetCC(CC)), CondCode, + SDValue Ops[] = { getI32Imm(PCC), CondCode, N->getOperand(4), N->getOperand(0) }; - return CurDAG->SelectNodeTo(N, PPC::BCC, MVT::Other, Ops, 4); + return CurDAG->SelectNodeTo(N, PPC::BCC, MVT::Other, Ops); } case ISD::BRIND: { // FIXME: Should custom lower this. @@ -1282,19 +1464,25 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { return CurDAG->SelectNodeTo(N, Reg, MVT::Other, Chain); } case PPCISD::TOC_ENTRY: { - assert (PPCSubTarget.isPPC64() && "Only supported for 64-bit ABI"); + assert ((PPCSubTarget->isPPC64() || PPCSubTarget->isSVR4ABI()) && + "Only supported for 64-bit ABI and 32-bit SVR4"); + if (PPCSubTarget->isSVR4ABI() && !PPCSubTarget->isPPC64()) { + SDValue GA = N->getOperand(0); + return CurDAG->getMachineNode(PPC::LWZtoc, dl, MVT::i32, GA, + N->getOperand(1)); + } // For medium and large code model, we generate two instructions as // described below. Otherwise we allow SelectCodeCommon to handle this, - // selecting one of LDtoc, LDtocJTI, and LDtocCPT. + // selecting one of LDtoc, LDtocJTI, LDtocCPT, and LDtocBA. CodeModel::Model CModel = TM.getCodeModel(); if (CModel != CodeModel::Medium && CModel != CodeModel::Large) break; - // The first source operand is a TargetGlobalAddress or a - // TargetJumpTable. If it is an externally defined symbol, a symbol - // with common linkage, a function address, or a jump table address, - // or if we are generating code for large code model, we generate: + // The first source operand is a TargetGlobalAddress or a TargetJumpTable. + // If it is an externally defined symbol, a symbol with common linkage, + // a non-local function address, or a jump table address, or if we are + // generating code for large code model, we generate: // LDtocL(, ADDIStocHA(%X2, )) // Otherwise we generate: // ADDItocL(ADDIStocHA(%X2, ), ) @@ -1303,24 +1491,17 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { SDNode *Tmp = CurDAG->getMachineNode(PPC::ADDIStocHA, dl, MVT::i64, TOCbase, GA); - if (isa(GA) || CModel == CodeModel::Large) + if (isa(GA) || isa(GA) || + CModel == CodeModel::Large) return CurDAG->getMachineNode(PPC::LDtocL, dl, MVT::i64, GA, SDValue(Tmp, 0)); if (GlobalAddressSDNode *G = dyn_cast(GA)) { const GlobalValue *GValue = G->getGlobal(); - const GlobalAlias *GAlias = dyn_cast(GValue); - const GlobalValue *RealGValue = GAlias ? - GAlias->resolveAliasedGlobal(false) : GValue; - const GlobalVariable *GVar = dyn_cast(RealGValue); - assert((GVar || isa(RealGValue)) && - "Unexpected global value subclass!"); - - // An external variable is one without an initializer. For these, - // for variables with common linkage, and for Functions, generate - // the LDtocL form. - if (!GVar || !GVar->hasInitializer() || RealGValue->hasCommonLinkage() || - RealGValue->hasAvailableExternallyLinkage()) + if ((GValue->getType()->getElementType()->isFunctionTy() && + (GValue->isDeclaration() || GValue->isWeakForLinker())) || + GValue->isDeclaration() || GValue->hasCommonLinkage() || + GValue->hasAvailableExternallyLinkage()) return CurDAG->getMachineNode(PPC::LDtocL, dl, MVT::i64, GA, SDValue(Tmp, 0)); } @@ -1328,6 +1509,12 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { return CurDAG->getMachineNode(PPC::ADDItocL, dl, MVT::i64, SDValue(Tmp, 0), GA); } + case PPCISD::PPC32_PICGOT: { + // Generate a PIC-safe GOT reference. + assert(!PPCSubTarget->isPPC64() && PPCSubTarget->isSVR4ABI() && + "PPCISD::PPC32_PICGOT is only supported for 32-bit SVR4"); + return CurDAG->SelectNodeTo(N, PPC::PPC32PICGOT, PPCLowering->getPointerTy(), MVT::i32); + } case PPCISD::VADD_SPLAT: { // This expands into one of three sequences, depending on whether // the first operand is odd or even, positive or negative. @@ -1404,7 +1591,7 @@ SDNode *PPCDAGToDAGISel::Select(SDNode *N) { return SelectCode(N); } -/// PostProcessISelDAG - Perform some late peephole optimizations +/// PostprocessISelDAG - Perform some late peephole optimizations /// on the DAG representation. void PPCDAGToDAGISel::PostprocessISelDAG() { @@ -1412,8 +1599,484 @@ void PPCDAGToDAGISel::PostprocessISelDAG() { if (TM.getOptLevel() == CodeGenOpt::None) return; + PeepholePPC64(); + PeepholeCROps(); +} + +// Check if all users of this node will become isel where the second operand +// is the constant zero. If this is so, and if we can negate the condition, +// then we can flip the true and false operands. This will allow the zero to +// be folded with the isel so that we don't need to materialize a register +// containing zero. +bool PPCDAGToDAGISel::AllUsersSelectZero(SDNode *N) { + // If we're not using isel, then this does not matter. + if (!PPCSubTarget->hasISEL()) + return false; + + for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end(); + UI != UE; ++UI) { + SDNode *User = *UI; + if (!User->isMachineOpcode()) + return false; + if (User->getMachineOpcode() != PPC::SELECT_I4 && + User->getMachineOpcode() != PPC::SELECT_I8) + return false; + + SDNode *Op2 = User->getOperand(2).getNode(); + if (!Op2->isMachineOpcode()) + return false; + + if (Op2->getMachineOpcode() != PPC::LI && + Op2->getMachineOpcode() != PPC::LI8) + return false; + + ConstantSDNode *C = dyn_cast(Op2->getOperand(0)); + if (!C) + return false; + + if (!C->isNullValue()) + return false; + } + + return true; +} + +void PPCDAGToDAGISel::SwapAllSelectUsers(SDNode *N) { + SmallVector ToReplace; + for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end(); + UI != UE; ++UI) { + SDNode *User = *UI; + assert((User->getMachineOpcode() == PPC::SELECT_I4 || + User->getMachineOpcode() == PPC::SELECT_I8) && + "Must have all select users"); + ToReplace.push_back(User); + } + + for (SmallVector::iterator UI = ToReplace.begin(), + UE = ToReplace.end(); UI != UE; ++UI) { + SDNode *User = *UI; + SDNode *ResNode = + CurDAG->getMachineNode(User->getMachineOpcode(), SDLoc(User), + User->getValueType(0), User->getOperand(0), + User->getOperand(2), + User->getOperand(1)); + + DEBUG(dbgs() << "CR Peephole replacing:\nOld: "); + DEBUG(User->dump(CurDAG)); + DEBUG(dbgs() << "\nNew: "); + DEBUG(ResNode->dump(CurDAG)); + DEBUG(dbgs() << "\n"); + + ReplaceUses(User, ResNode); + } +} + +void PPCDAGToDAGISel::PeepholeCROps() { + bool IsModified; + do { + IsModified = false; + for (SelectionDAG::allnodes_iterator I = CurDAG->allnodes_begin(), + E = CurDAG->allnodes_end(); I != E; ++I) { + MachineSDNode *MachineNode = dyn_cast(I); + if (!MachineNode || MachineNode->use_empty()) + continue; + SDNode *ResNode = MachineNode; + + bool Op1Set = false, Op1Unset = false, + Op1Not = false, + Op2Set = false, Op2Unset = false, + Op2Not = false; + + unsigned Opcode = MachineNode->getMachineOpcode(); + switch (Opcode) { + default: break; + case PPC::CRAND: + case PPC::CRNAND: + case PPC::CROR: + case PPC::CRXOR: + case PPC::CRNOR: + case PPC::CREQV: + case PPC::CRANDC: + case PPC::CRORC: { + SDValue Op = MachineNode->getOperand(1); + if (Op.isMachineOpcode()) { + if (Op.getMachineOpcode() == PPC::CRSET) + Op2Set = true; + else if (Op.getMachineOpcode() == PPC::CRUNSET) + Op2Unset = true; + else if (Op.getMachineOpcode() == PPC::CRNOR && + Op.getOperand(0) == Op.getOperand(1)) + Op2Not = true; + } + } // fallthrough + case PPC::BC: + case PPC::BCn: + case PPC::SELECT_I4: + case PPC::SELECT_I8: + case PPC::SELECT_F4: + case PPC::SELECT_F8: + case PPC::SELECT_VRRC: + case PPC::SELECT_VSFRC: + case PPC::SELECT_VSRC: { + SDValue Op = MachineNode->getOperand(0); + if (Op.isMachineOpcode()) { + if (Op.getMachineOpcode() == PPC::CRSET) + Op1Set = true; + else if (Op.getMachineOpcode() == PPC::CRUNSET) + Op1Unset = true; + else if (Op.getMachineOpcode() == PPC::CRNOR && + Op.getOperand(0) == Op.getOperand(1)) + Op1Not = true; + } + } + break; + } + + bool SelectSwap = false; + switch (Opcode) { + default: break; + case PPC::CRAND: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // x & x = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Set) + // 1 & y = y + ResNode = MachineNode->getOperand(1).getNode(); + else if (Op2Set) + // x & 1 = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Unset || Op2Unset) + // x & 0 = 0 & y = 0 + ResNode = CurDAG->getMachineNode(PPC::CRUNSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Not) + // ~x & y = andc(y, x) + ResNode = CurDAG->getMachineNode(PPC::CRANDC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(0). + getOperand(0)); + else if (Op2Not) + // x & ~y = andc(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRANDC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1). + getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CRNAND, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1)), + SelectSwap = true; + break; + case PPC::CRNAND: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // nand(x, x) -> nor(x, x) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(0)); + else if (Op1Set) + // nand(1, y) -> nor(y, y) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(1)); + else if (Op2Set) + // nand(x, 1) -> nor(x, x) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(0)); + else if (Op1Unset || Op2Unset) + // nand(x, 0) = nand(0, y) = 1 + ResNode = CurDAG->getMachineNode(PPC::CRSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Not) + // nand(~x, y) = ~(~x & y) = x | ~y = orc(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRORC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1)); + else if (Op2Not) + // nand(x, ~y) = ~x | y = orc(y, x) + ResNode = CurDAG->getMachineNode(PPC::CRORC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1). + getOperand(0), + MachineNode->getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CRAND, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1)), + SelectSwap = true; + break; + case PPC::CROR: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // x | x = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Set || Op2Set) + // x | 1 = 1 | y = 1 + ResNode = CurDAG->getMachineNode(PPC::CRSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Unset) + // 0 | y = y + ResNode = MachineNode->getOperand(1).getNode(); + else if (Op2Unset) + // x | 0 = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Not) + // ~x | y = orc(y, x) + ResNode = CurDAG->getMachineNode(PPC::CRORC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(0). + getOperand(0)); + else if (Op2Not) + // x | ~y = orc(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRORC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1). + getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1)), + SelectSwap = true; + break; + case PPC::CRXOR: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // xor(x, x) = 0 + ResNode = CurDAG->getMachineNode(PPC::CRUNSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Set) + // xor(1, y) -> nor(y, y) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(1)); + else if (Op2Set) + // xor(x, 1) -> nor(x, x) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(0)); + else if (Op1Unset) + // xor(0, y) = y + ResNode = MachineNode->getOperand(1).getNode(); + else if (Op2Unset) + // xor(x, 0) = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Not) + // xor(~x, y) = eqv(x, y) + ResNode = CurDAG->getMachineNode(PPC::CREQV, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1)); + else if (Op2Not) + // xor(x, ~y) = eqv(x, y) + ResNode = CurDAG->getMachineNode(PPC::CREQV, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1). + getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CREQV, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1)), + SelectSwap = true; + break; + case PPC::CRNOR: + if (Op1Set || Op2Set) + // nor(1, y) -> 0 + ResNode = CurDAG->getMachineNode(PPC::CRUNSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Unset) + // nor(0, y) = ~y -> nor(y, y) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(1)); + else if (Op2Unset) + // nor(x, 0) = ~x + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(0)); + else if (Op1Not) + // nor(~x, y) = andc(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRANDC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1)); + else if (Op2Not) + // nor(x, ~y) = andc(y, x) + ResNode = CurDAG->getMachineNode(PPC::CRANDC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1). + getOperand(0), + MachineNode->getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CROR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1)), + SelectSwap = true; + break; + case PPC::CREQV: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // eqv(x, x) = 1 + ResNode = CurDAG->getMachineNode(PPC::CRSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Set) + // eqv(1, y) = y + ResNode = MachineNode->getOperand(1).getNode(); + else if (Op2Set) + // eqv(x, 1) = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Unset) + // eqv(0, y) = ~y -> nor(y, y) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(1)); + else if (Op2Unset) + // eqv(x, 0) = ~x + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(0)); + else if (Op1Not) + // eqv(~x, y) = xor(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRXOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1)); + else if (Op2Not) + // eqv(x, ~y) = xor(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRXOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1). + getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CRXOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1)), + SelectSwap = true; + break; + case PPC::CRANDC: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // andc(x, x) = 0 + ResNode = CurDAG->getMachineNode(PPC::CRUNSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Set) + // andc(1, y) = ~y + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(1)); + else if (Op1Unset || Op2Set) + // andc(0, y) = andc(x, 1) = 0 + ResNode = CurDAG->getMachineNode(PPC::CRUNSET, SDLoc(MachineNode), + MVT::i1); + else if (Op2Unset) + // andc(x, 0) = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Not) + // andc(~x, y) = ~(x | y) = nor(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1)); + else if (Op2Not) + // andc(x, ~y) = x & y + ResNode = CurDAG->getMachineNode(PPC::CRAND, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1). + getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CRORC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(0)), + SelectSwap = true; + break; + case PPC::CRORC: + if (MachineNode->getOperand(0) == MachineNode->getOperand(1)) + // orc(x, x) = 1 + ResNode = CurDAG->getMachineNode(PPC::CRSET, SDLoc(MachineNode), + MVT::i1); + else if (Op1Set || Op2Unset) + // orc(1, y) = orc(x, 0) = 1 + ResNode = CurDAG->getMachineNode(PPC::CRSET, SDLoc(MachineNode), + MVT::i1); + else if (Op2Set) + // orc(x, 1) = x + ResNode = MachineNode->getOperand(0).getNode(); + else if (Op1Unset) + // orc(0, y) = ~y + ResNode = CurDAG->getMachineNode(PPC::CRNOR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(1)); + else if (Op1Not) + // orc(~x, y) = ~(x & y) = nand(x, y) + ResNode = CurDAG->getMachineNode(PPC::CRNAND, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1)); + else if (Op2Not) + // orc(x, ~y) = x | y + ResNode = CurDAG->getMachineNode(PPC::CROR, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(0), + MachineNode->getOperand(1). + getOperand(0)); + else if (AllUsersSelectZero(MachineNode)) + ResNode = CurDAG->getMachineNode(PPC::CRANDC, SDLoc(MachineNode), + MVT::i1, MachineNode->getOperand(1), + MachineNode->getOperand(0)), + SelectSwap = true; + break; + case PPC::SELECT_I4: + case PPC::SELECT_I8: + case PPC::SELECT_F4: + case PPC::SELECT_F8: + case PPC::SELECT_VRRC: + case PPC::SELECT_VSFRC: + case PPC::SELECT_VSRC: + if (Op1Set) + ResNode = MachineNode->getOperand(1).getNode(); + else if (Op1Unset) + ResNode = MachineNode->getOperand(2).getNode(); + else if (Op1Not) + ResNode = CurDAG->getMachineNode(MachineNode->getMachineOpcode(), + SDLoc(MachineNode), + MachineNode->getValueType(0), + MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(2), + MachineNode->getOperand(1)); + break; + case PPC::BC: + case PPC::BCn: + if (Op1Not) + ResNode = CurDAG->getMachineNode(Opcode == PPC::BC ? PPC::BCn : + PPC::BC, + SDLoc(MachineNode), + MVT::Other, + MachineNode->getOperand(0). + getOperand(0), + MachineNode->getOperand(1), + MachineNode->getOperand(2)); + // FIXME: Handle Op1Set, Op1Unset here too. + break; + } + + // If we're inverting this node because it is used only by selects that + // we'd like to swap, then swap the selects before the node replacement. + if (SelectSwap) + SwapAllSelectUsers(MachineNode); + + if (ResNode != MachineNode) { + DEBUG(dbgs() << "CR Peephole replacing:\nOld: "); + DEBUG(MachineNode->dump(CurDAG)); + DEBUG(dbgs() << "\nNew: "); + DEBUG(ResNode->dump(CurDAG)); + DEBUG(dbgs() << "\n"); + + ReplaceUses(MachineNode, ResNode); + IsModified = true; + } + } + if (IsModified) + CurDAG->RemoveDeadNodes(); + } while (IsModified); +} + +void PPCDAGToDAGISel::PeepholePPC64() { // These optimizations are currently supported only for 64-bit SVR4. - if (PPCSubTarget.isDarwin() || !PPCSubTarget.isPPC64()) + if (PPCSubTarget->isDarwin() || !PPCSubTarget->isPPC64()) return; SelectionDAG::allnodes_iterator Position(CurDAG->getRoot().getNode()); @@ -1571,8 +2234,8 @@ FunctionPass *llvm::createPPCISelDag(PPCTargetMachine &TM) { static void initializePassOnce(PassRegistry &Registry) { const char *Name = "PowerPC DAG->DAG Pattern Instruction Selection"; - PassInfo *PI = new PassInfo(Name, "ppc-codegen", &SelectionDAGISel::ID, 0, - false, false); + PassInfo *PI = new PassInfo(Name, "ppc-codegen", &SelectionDAGISel::ID, + nullptr, false, false); Registry.registerPass(*PI, true); }