| //===-- ARMISelDAGToDAG.cpp - A dag to dag inst selector for ARM ----------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines an instruction selector for the ARM target. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "ARM.h" |
| #include "ARMAddressingModes.h" |
| #include "ARMConstantPoolValue.h" |
| #include "ARMISelLowering.h" |
| #include "ARMTargetMachine.h" |
| #include "llvm/CallingConv.h" |
| #include "llvm/Constants.h" |
| #include "llvm/DerivedTypes.h" |
| #include "llvm/Function.h" |
| #include "llvm/Intrinsics.h" |
| #include "llvm/LLVMContext.h" |
| #include "llvm/CodeGen/MachineFrameInfo.h" |
| #include "llvm/CodeGen/MachineFunction.h" |
| #include "llvm/CodeGen/MachineInstrBuilder.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/CodeGen/SelectionDAGISel.h" |
| #include "llvm/Target/TargetLowering.h" |
| #include "llvm/Target/TargetOptions.h" |
| #include "llvm/Support/Compiler.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| |
| //===--------------------------------------------------------------------===// |
| /// ARMDAGToDAGISel - ARM specific code to select ARM machine |
| /// instructions for SelectionDAG operations. |
| /// |
| namespace { |
| class ARMDAGToDAGISel : public SelectionDAGISel { |
| ARMBaseTargetMachine &TM; |
| |
| /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can |
| /// make the right decision when generating code for different targets. |
| const ARMSubtarget *Subtarget; |
| |
| public: |
| explicit ARMDAGToDAGISel(ARMBaseTargetMachine &tm) |
| : SelectionDAGISel(tm), TM(tm), |
| Subtarget(&TM.getSubtarget<ARMSubtarget>()) { |
| } |
| |
| virtual const char *getPassName() const { |
| return "ARM Instruction Selection"; |
| } |
| |
| /// getI32Imm - Return a target constant with the specified value, of type i32. |
| inline SDValue getI32Imm(unsigned Imm) { |
| return CurDAG->getTargetConstant(Imm, MVT::i32); |
| } |
| |
| SDNode *Select(SDValue Op); |
| virtual void InstructionSelect(); |
| bool SelectShifterOperandReg(SDValue Op, SDValue N, SDValue &A, |
| SDValue &B, SDValue &C); |
| bool SelectAddrMode2(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &Offset, SDValue &Opc); |
| bool SelectAddrMode2Offset(SDValue Op, SDValue N, |
| SDValue &Offset, SDValue &Opc); |
| bool SelectAddrMode3(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &Offset, SDValue &Opc); |
| bool SelectAddrMode3Offset(SDValue Op, SDValue N, |
| SDValue &Offset, SDValue &Opc); |
| bool SelectAddrMode4(SDValue Op, SDValue N, SDValue &Addr, |
| SDValue &Mode); |
| bool SelectAddrMode5(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &Offset); |
| bool SelectAddrMode6(SDValue Op, SDValue N, SDValue &Addr, SDValue &Update, |
| SDValue &Opc); |
| |
| bool SelectAddrModePC(SDValue Op, SDValue N, SDValue &Offset, |
| SDValue &Label); |
| |
| bool SelectThumbAddrModeRR(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &Offset); |
| bool SelectThumbAddrModeRI5(SDValue Op, SDValue N, unsigned Scale, |
| SDValue &Base, SDValue &OffImm, |
| SDValue &Offset); |
| bool SelectThumbAddrModeS1(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm, SDValue &Offset); |
| bool SelectThumbAddrModeS2(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm, SDValue &Offset); |
| bool SelectThumbAddrModeS4(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm, SDValue &Offset); |
| bool SelectThumbAddrModeSP(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm); |
| |
| bool SelectT2ShifterOperandReg(SDValue Op, SDValue N, |
| SDValue &BaseReg, SDValue &Opc); |
| bool SelectT2AddrModeImm12(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm); |
| bool SelectT2AddrModeImm8(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm); |
| bool SelectT2AddrModeImm8Offset(SDValue Op, SDValue N, |
| SDValue &OffImm); |
| bool SelectT2AddrModeImm8s4(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffImm); |
| bool SelectT2AddrModeSoReg(SDValue Op, SDValue N, SDValue &Base, |
| SDValue &OffReg, SDValue &ShImm); |
| |
| // Include the pieces autogenerated from the target description. |
| #include "ARMGenDAGISel.inc" |
| |
| private: |
| /// SelectARMIndexedLoad - Indexed (pre/post inc/dec) load matching code for |
| /// ARM. |
| SDNode *SelectARMIndexedLoad(SDValue Op); |
| SDNode *SelectT2IndexedLoad(SDValue Op); |
| |
| /// SelectDYN_ALLOC - Select dynamic alloc for Thumb. |
| SDNode *SelectDYN_ALLOC(SDValue Op); |
| |
| /// SelectInlineAsmMemoryOperand - Implement addressing mode selection for |
| /// inline asm expressions. |
| virtual bool SelectInlineAsmMemoryOperand(const SDValue &Op, |
| char ConstraintCode, |
| std::vector<SDValue> &OutOps); |
| }; |
| } |
| |
| void ARMDAGToDAGISel::InstructionSelect() { |
| DEBUG(BB->dump()); |
| |
| SelectRoot(*CurDAG); |
| CurDAG->RemoveDeadNodes(); |
| } |
| |
| bool ARMDAGToDAGISel::SelectShifterOperandReg(SDValue Op, |
| SDValue N, |
| SDValue &BaseReg, |
| SDValue &ShReg, |
| SDValue &Opc) { |
| ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N); |
| |
| // Don't match base register only case. That is matched to a separate |
| // lower complexity pattern with explicit register operand. |
| if (ShOpcVal == ARM_AM::no_shift) return false; |
| |
| BaseReg = N.getOperand(0); |
| unsigned ShImmVal = 0; |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| ShReg = CurDAG->getRegister(0, MVT::i32); |
| ShImmVal = RHS->getZExtValue() & 31; |
| } else { |
| ShReg = N.getOperand(1); |
| } |
| Opc = CurDAG->getTargetConstant(ARM_AM::getSORegOpc(ShOpcVal, ShImmVal), |
| MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrMode2(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &Offset, |
| SDValue &Opc) { |
| if (N.getOpcode() == ISD::MUL) { |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| // X * [3,5,9] -> X + X * [2,4,8] etc. |
| int RHSC = (int)RHS->getZExtValue(); |
| if (RHSC & 1) { |
| RHSC = RHSC & ~1; |
| ARM_AM::AddrOpc AddSub = ARM_AM::add; |
| if (RHSC < 0) { |
| AddSub = ARM_AM::sub; |
| RHSC = - RHSC; |
| } |
| if (isPowerOf2_32(RHSC)) { |
| unsigned ShAmt = Log2_32(RHSC); |
| Base = Offset = N.getOperand(0); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, ShAmt, |
| ARM_AM::lsl), |
| MVT::i32); |
| return true; |
| } |
| } |
| } |
| } |
| |
| if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::SUB) { |
| Base = N; |
| if (N.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(N)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } else if (N.getOpcode() == ARMISD::Wrapper) { |
| Base = N.getOperand(0); |
| } |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(ARM_AM::add, 0, |
| ARM_AM::no_shift), |
| MVT::i32); |
| return true; |
| } |
| |
| // Match simple R +/- imm12 operands. |
| if (N.getOpcode() == ISD::ADD) |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if ((RHSC >= 0 && RHSC < 0x1000) || |
| (RHSC < 0 && RHSC > -0x1000)) { // 12 bits. |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(Base)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| |
| ARM_AM::AddrOpc AddSub = ARM_AM::add; |
| if (RHSC < 0) { |
| AddSub = ARM_AM::sub; |
| RHSC = - RHSC; |
| } |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, RHSC, |
| ARM_AM::no_shift), |
| MVT::i32); |
| return true; |
| } |
| } |
| |
| // Otherwise this is R +/- [possibly shifted] R |
| ARM_AM::AddrOpc AddSub = N.getOpcode() == ISD::ADD ? ARM_AM::add:ARM_AM::sub; |
| ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N.getOperand(1)); |
| unsigned ShAmt = 0; |
| |
| Base = N.getOperand(0); |
| Offset = N.getOperand(1); |
| |
| if (ShOpcVal != ARM_AM::no_shift) { |
| // Check to see if the RHS of the shift is a constant, if not, we can't fold |
| // it. |
| if (ConstantSDNode *Sh = |
| dyn_cast<ConstantSDNode>(N.getOperand(1).getOperand(1))) { |
| ShAmt = Sh->getZExtValue(); |
| Offset = N.getOperand(1).getOperand(0); |
| } else { |
| ShOpcVal = ARM_AM::no_shift; |
| } |
| } |
| |
| // Try matching (R shl C) + (R). |
| if (N.getOpcode() == ISD::ADD && ShOpcVal == ARM_AM::no_shift) { |
| ShOpcVal = ARM_AM::getShiftOpcForNode(N.getOperand(0)); |
| if (ShOpcVal != ARM_AM::no_shift) { |
| // Check to see if the RHS of the shift is a constant, if not, we can't |
| // fold it. |
| if (ConstantSDNode *Sh = |
| dyn_cast<ConstantSDNode>(N.getOperand(0).getOperand(1))) { |
| ShAmt = Sh->getZExtValue(); |
| Offset = N.getOperand(0).getOperand(0); |
| Base = N.getOperand(1); |
| } else { |
| ShOpcVal = ARM_AM::no_shift; |
| } |
| } |
| } |
| |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, ShAmt, ShOpcVal), |
| MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrMode2Offset(SDValue Op, SDValue N, |
| SDValue &Offset, SDValue &Opc) { |
| unsigned Opcode = Op.getOpcode(); |
| ISD::MemIndexedMode AM = (Opcode == ISD::LOAD) |
| ? cast<LoadSDNode>(Op)->getAddressingMode() |
| : cast<StoreSDNode>(Op)->getAddressingMode(); |
| ARM_AM::AddrOpc AddSub = (AM == ISD::PRE_INC || AM == ISD::POST_INC) |
| ? ARM_AM::add : ARM_AM::sub; |
| if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N)) { |
| int Val = (int)C->getZExtValue(); |
| if (Val >= 0 && Val < 0x1000) { // 12 bits. |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, Val, |
| ARM_AM::no_shift), |
| MVT::i32); |
| return true; |
| } |
| } |
| |
| Offset = N; |
| ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N); |
| unsigned ShAmt = 0; |
| if (ShOpcVal != ARM_AM::no_shift) { |
| // Check to see if the RHS of the shift is a constant, if not, we can't fold |
| // it. |
| if (ConstantSDNode *Sh = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| ShAmt = Sh->getZExtValue(); |
| Offset = N.getOperand(0); |
| } else { |
| ShOpcVal = ARM_AM::no_shift; |
| } |
| } |
| |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, ShAmt, ShOpcVal), |
| MVT::i32); |
| return true; |
| } |
| |
| |
| bool ARMDAGToDAGISel::SelectAddrMode3(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &Offset, |
| SDValue &Opc) { |
| if (N.getOpcode() == ISD::SUB) { |
| // X - C is canonicalize to X + -C, no need to handle it here. |
| Base = N.getOperand(0); |
| Offset = N.getOperand(1); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::sub, 0),MVT::i32); |
| return true; |
| } |
| |
| if (N.getOpcode() != ISD::ADD) { |
| Base = N; |
| if (N.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(N)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::add, 0),MVT::i32); |
| return true; |
| } |
| |
| // If the RHS is +/- imm8, fold into addr mode. |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if ((RHSC >= 0 && RHSC < 256) || |
| (RHSC < 0 && RHSC > -256)) { // note -256 itself isn't allowed. |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(Base)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| |
| ARM_AM::AddrOpc AddSub = ARM_AM::add; |
| if (RHSC < 0) { |
| AddSub = ARM_AM::sub; |
| RHSC = - RHSC; |
| } |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, RHSC),MVT::i32); |
| return true; |
| } |
| } |
| |
| Base = N.getOperand(0); |
| Offset = N.getOperand(1); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::add, 0), MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrMode3Offset(SDValue Op, SDValue N, |
| SDValue &Offset, SDValue &Opc) { |
| unsigned Opcode = Op.getOpcode(); |
| ISD::MemIndexedMode AM = (Opcode == ISD::LOAD) |
| ? cast<LoadSDNode>(Op)->getAddressingMode() |
| : cast<StoreSDNode>(Op)->getAddressingMode(); |
| ARM_AM::AddrOpc AddSub = (AM == ISD::PRE_INC || AM == ISD::POST_INC) |
| ? ARM_AM::add : ARM_AM::sub; |
| if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N)) { |
| int Val = (int)C->getZExtValue(); |
| if (Val >= 0 && Val < 256) { |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, Val), MVT::i32); |
| return true; |
| } |
| } |
| |
| Offset = N; |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, 0), MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrMode4(SDValue Op, SDValue N, |
| SDValue &Addr, SDValue &Mode) { |
| Addr = N; |
| Mode = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrMode5(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &Offset) { |
| if (N.getOpcode() != ISD::ADD) { |
| Base = N; |
| if (N.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(N)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } else if (N.getOpcode() == ARMISD::Wrapper) { |
| Base = N.getOperand(0); |
| } |
| Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(ARM_AM::add, 0), |
| MVT::i32); |
| return true; |
| } |
| |
| // If the RHS is +/- imm8, fold into addr mode. |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if ((RHSC & 3) == 0) { // The constant is implicitly multiplied by 4. |
| RHSC >>= 2; |
| if ((RHSC >= 0 && RHSC < 256) || |
| (RHSC < 0 && RHSC > -256)) { // note -256 itself isn't allowed. |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(Base)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| |
| ARM_AM::AddrOpc AddSub = ARM_AM::add; |
| if (RHSC < 0) { |
| AddSub = ARM_AM::sub; |
| RHSC = - RHSC; |
| } |
| Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(AddSub, RHSC), |
| MVT::i32); |
| return true; |
| } |
| } |
| } |
| |
| Base = N; |
| Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(ARM_AM::add, 0), |
| MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrMode6(SDValue Op, SDValue N, |
| SDValue &Addr, SDValue &Update, |
| SDValue &Opc) { |
| Addr = N; |
| // The optional writeback is handled in ARMLoadStoreOpt. |
| Update = CurDAG->getRegister(0, MVT::i32); |
| Opc = CurDAG->getTargetConstant(ARM_AM::getAM6Opc(false), MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectAddrModePC(SDValue Op, SDValue N, |
| SDValue &Offset, SDValue &Label) { |
| if (N.getOpcode() == ARMISD::PIC_ADD && N.hasOneUse()) { |
| Offset = N.getOperand(0); |
| SDValue N1 = N.getOperand(1); |
| Label = CurDAG->getTargetConstant(cast<ConstantSDNode>(N1)->getZExtValue(), |
| MVT::i32); |
| return true; |
| } |
| return false; |
| } |
| |
| bool ARMDAGToDAGISel::SelectThumbAddrModeRR(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &Offset){ |
| // FIXME dl should come from the parent load or store, not the address |
| DebugLoc dl = Op.getDebugLoc(); |
| if (N.getOpcode() != ISD::ADD) { |
| ConstantSDNode *NC = dyn_cast<ConstantSDNode>(N); |
| if (!NC || NC->getZExtValue() != 0) |
| return false; |
| |
| Base = Offset = N; |
| return true; |
| } |
| |
| Base = N.getOperand(0); |
| Offset = N.getOperand(1); |
| return true; |
| } |
| |
| bool |
| ARMDAGToDAGISel::SelectThumbAddrModeRI5(SDValue Op, SDValue N, |
| unsigned Scale, SDValue &Base, |
| SDValue &OffImm, SDValue &Offset) { |
| if (Scale == 4) { |
| SDValue TmpBase, TmpOffImm; |
| if (SelectThumbAddrModeSP(Op, N, TmpBase, TmpOffImm)) |
| return false; // We want to select tLDRspi / tSTRspi instead. |
| if (N.getOpcode() == ARMISD::Wrapper && |
| N.getOperand(0).getOpcode() == ISD::TargetConstantPool) |
| return false; // We want to select tLDRpci instead. |
| } |
| |
| if (N.getOpcode() != ISD::ADD) { |
| Base = (N.getOpcode() == ARMISD::Wrapper) ? N.getOperand(0) : N; |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| // Thumb does not have [sp, r] address mode. |
| RegisterSDNode *LHSR = dyn_cast<RegisterSDNode>(N.getOperand(0)); |
| RegisterSDNode *RHSR = dyn_cast<RegisterSDNode>(N.getOperand(1)); |
| if ((LHSR && LHSR->getReg() == ARM::SP) || |
| (RHSR && RHSR->getReg() == ARM::SP)) { |
| Base = N; |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| // If the RHS is + imm5 * scale, fold into addr mode. |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if ((RHSC & (Scale-1)) == 0) { // The constant is implicitly multiplied. |
| RHSC /= Scale; |
| if (RHSC >= 0 && RHSC < 32) { |
| Base = N.getOperand(0); |
| Offset = CurDAG->getRegister(0, MVT::i32); |
| OffImm = CurDAG->getTargetConstant(RHSC, MVT::i32); |
| return true; |
| } |
| } |
| } |
| |
| Base = N.getOperand(0); |
| Offset = N.getOperand(1); |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectThumbAddrModeS1(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm, |
| SDValue &Offset) { |
| return SelectThumbAddrModeRI5(Op, N, 1, Base, OffImm, Offset); |
| } |
| |
| bool ARMDAGToDAGISel::SelectThumbAddrModeS2(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm, |
| SDValue &Offset) { |
| return SelectThumbAddrModeRI5(Op, N, 2, Base, OffImm, Offset); |
| } |
| |
| bool ARMDAGToDAGISel::SelectThumbAddrModeS4(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm, |
| SDValue &Offset) { |
| return SelectThumbAddrModeRI5(Op, N, 4, Base, OffImm, Offset); |
| } |
| |
| bool ARMDAGToDAGISel::SelectThumbAddrModeSP(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm) { |
| if (N.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(N)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| if (N.getOpcode() != ISD::ADD) |
| return false; |
| |
| RegisterSDNode *LHSR = dyn_cast<RegisterSDNode>(N.getOperand(0)); |
| if (N.getOperand(0).getOpcode() == ISD::FrameIndex || |
| (LHSR && LHSR->getReg() == ARM::SP)) { |
| // If the RHS is + imm8 * scale, fold into addr mode. |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if ((RHSC & 3) == 0) { // The constant is implicitly multiplied. |
| RHSC >>= 2; |
| if (RHSC >= 0 && RHSC < 256) { |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(Base)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| OffImm = CurDAG->getTargetConstant(RHSC, MVT::i32); |
| return true; |
| } |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| bool ARMDAGToDAGISel::SelectT2ShifterOperandReg(SDValue Op, SDValue N, |
| SDValue &BaseReg, |
| SDValue &Opc) { |
| ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(N); |
| |
| // Don't match base register only case. That is matched to a separate |
| // lower complexity pattern with explicit register operand. |
| if (ShOpcVal == ARM_AM::no_shift) return false; |
| |
| BaseReg = N.getOperand(0); |
| unsigned ShImmVal = 0; |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| ShImmVal = RHS->getZExtValue() & 31; |
| Opc = getI32Imm(ARM_AM::getSORegOpc(ShOpcVal, ShImmVal)); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool ARMDAGToDAGISel::SelectT2AddrModeImm12(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm) { |
| // Match simple R + imm12 operands. |
| |
| // Base only. |
| if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::SUB) { |
| if (N.getOpcode() == ISD::FrameIndex) { |
| // Match frame index... |
| int FI = cast<FrameIndexSDNode>(N)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } else if (N.getOpcode() == ARMISD::Wrapper) { |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::TargetConstantPool) |
| return false; // We want to select t2LDRpci instead. |
| } else |
| Base = N; |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| if (SelectT2AddrModeImm8(Op, N, Base, OffImm)) |
| // Let t2LDRi8 handle (R - imm8). |
| return false; |
| |
| int RHSC = (int)RHS->getZExtValue(); |
| if (N.getOpcode() == ISD::SUB) |
| RHSC = -RHSC; |
| |
| if (RHSC >= 0 && RHSC < 0x1000) { // 12 bits (unsigned) |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(Base)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| OffImm = CurDAG->getTargetConstant(RHSC, MVT::i32); |
| return true; |
| } |
| } |
| |
| // Base only. |
| Base = N; |
| OffImm = CurDAG->getTargetConstant(0, MVT::i32); |
| return true; |
| } |
| |
| bool ARMDAGToDAGISel::SelectT2AddrModeImm8(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm) { |
| // Match simple R - imm8 operands. |
| if (N.getOpcode() == ISD::ADD || N.getOpcode() == ISD::SUB) { |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getSExtValue(); |
| if (N.getOpcode() == ISD::SUB) |
| RHSC = -RHSC; |
| |
| if ((RHSC >= -255) && (RHSC < 0)) { // 8 bits (always negative) |
| Base = N.getOperand(0); |
| if (Base.getOpcode() == ISD::FrameIndex) { |
| int FI = cast<FrameIndexSDNode>(Base)->getIndex(); |
| Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| } |
| OffImm = CurDAG->getTargetConstant(RHSC, MVT::i32); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| bool ARMDAGToDAGISel::SelectT2AddrModeImm8Offset(SDValue Op, SDValue N, |
| SDValue &OffImm){ |
| unsigned Opcode = Op.getOpcode(); |
| ISD::MemIndexedMode AM = (Opcode == ISD::LOAD) |
| ? cast<LoadSDNode>(Op)->getAddressingMode() |
| : cast<StoreSDNode>(Op)->getAddressingMode(); |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N)) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if (RHSC >= 0 && RHSC < 0x100) { // 8 bits. |
| OffImm = ((AM == ISD::PRE_INC) || (AM == ISD::POST_INC)) |
| ? CurDAG->getTargetConstant(RHSC, MVT::i32) |
| : CurDAG->getTargetConstant(-RHSC, MVT::i32); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| bool ARMDAGToDAGISel::SelectT2AddrModeImm8s4(SDValue Op, SDValue N, |
| SDValue &Base, SDValue &OffImm) { |
| if (N.getOpcode() == ISD::ADD) { |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if (((RHSC & 0x3) == 0) && |
| ((RHSC >= 0 && RHSC < 0x400) || (RHSC < 0 && RHSC > -0x400))) { // 8 bits. |
| Base = N.getOperand(0); |
| OffImm = CurDAG->getTargetConstant(RHSC, MVT::i32); |
| return true; |
| } |
| } |
| } else if (N.getOpcode() == ISD::SUB) { |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if (((RHSC & 0x3) == 0) && (RHSC >= 0 && RHSC < 0x400)) { // 8 bits. |
| Base = N.getOperand(0); |
| OffImm = CurDAG->getTargetConstant(-RHSC, MVT::i32); |
| return true; |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| bool ARMDAGToDAGISel::SelectT2AddrModeSoReg(SDValue Op, SDValue N, |
| SDValue &Base, |
| SDValue &OffReg, SDValue &ShImm) { |
| // (R - imm8) should be handled by t2LDRi8. The rest are handled by t2LDRi12. |
| if (N.getOpcode() != ISD::ADD) |
| return false; |
| |
| // Leave (R + imm12) for t2LDRi12, (R - imm8) for t2LDRi8. |
| if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) { |
| int RHSC = (int)RHS->getZExtValue(); |
| if (RHSC >= 0 && RHSC < 0x1000) // 12 bits (unsigned) |
| return false; |
| else if (RHSC < 0 && RHSC >= -255) // 8 bits |
| return false; |
| } |
| |
| // Look for (R + R) or (R + (R << [1,2,3])). |
| unsigned ShAmt = 0; |
| Base = N.getOperand(0); |
| OffReg = N.getOperand(1); |
| |
| // Swap if it is ((R << c) + R). |
| ARM_AM::ShiftOpc ShOpcVal = ARM_AM::getShiftOpcForNode(OffReg); |
| if (ShOpcVal != ARM_AM::lsl) { |
| ShOpcVal = ARM_AM::getShiftOpcForNode(Base); |
| if (ShOpcVal == ARM_AM::lsl) |
| std::swap(Base, OffReg); |
| } |
| |
| if (ShOpcVal == ARM_AM::lsl) { |
| // Check to see if the RHS of the shift is a constant, if not, we can't fold |
| // it. |
| if (ConstantSDNode *Sh = dyn_cast<ConstantSDNode>(OffReg.getOperand(1))) { |
| ShAmt = Sh->getZExtValue(); |
| if (ShAmt >= 4) { |
| ShAmt = 0; |
| ShOpcVal = ARM_AM::no_shift; |
| } else |
| OffReg = OffReg.getOperand(0); |
| } else { |
| ShOpcVal = ARM_AM::no_shift; |
| } |
| } |
| |
| ShImm = CurDAG->getTargetConstant(ShAmt, MVT::i32); |
| |
| return true; |
| } |
| |
| //===--------------------------------------------------------------------===// |
| |
| /// getAL - Returns a ARMCC::AL immediate node. |
| static inline SDValue getAL(SelectionDAG *CurDAG) { |
| return CurDAG->getTargetConstant((uint64_t)ARMCC::AL, MVT::i32); |
| } |
| |
| SDNode *ARMDAGToDAGISel::SelectARMIndexedLoad(SDValue Op) { |
| LoadSDNode *LD = cast<LoadSDNode>(Op); |
| ISD::MemIndexedMode AM = LD->getAddressingMode(); |
| if (AM == ISD::UNINDEXED) |
| return NULL; |
| |
| EVT LoadedVT = LD->getMemoryVT(); |
| SDValue Offset, AMOpc; |
| bool isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC); |
| unsigned Opcode = 0; |
| bool Match = false; |
| if (LoadedVT == MVT::i32 && |
| SelectAddrMode2Offset(Op, LD->getOffset(), Offset, AMOpc)) { |
| Opcode = isPre ? ARM::LDR_PRE : ARM::LDR_POST; |
| Match = true; |
| } else if (LoadedVT == MVT::i16 && |
| SelectAddrMode3Offset(Op, LD->getOffset(), Offset, AMOpc)) { |
| Match = true; |
| Opcode = (LD->getExtensionType() == ISD::SEXTLOAD) |
| ? (isPre ? ARM::LDRSH_PRE : ARM::LDRSH_POST) |
| : (isPre ? ARM::LDRH_PRE : ARM::LDRH_POST); |
| } else if (LoadedVT == MVT::i8 || LoadedVT == MVT::i1) { |
| if (LD->getExtensionType() == ISD::SEXTLOAD) { |
| if (SelectAddrMode3Offset(Op, LD->getOffset(), Offset, AMOpc)) { |
| Match = true; |
| Opcode = isPre ? ARM::LDRSB_PRE : ARM::LDRSB_POST; |
| } |
| } else { |
| if (SelectAddrMode2Offset(Op, LD->getOffset(), Offset, AMOpc)) { |
| Match = true; |
| Opcode = isPre ? ARM::LDRB_PRE : ARM::LDRB_POST; |
| } |
| } |
| } |
| |
| if (Match) { |
| SDValue Chain = LD->getChain(); |
| SDValue Base = LD->getBasePtr(); |
| SDValue Ops[]= { Base, Offset, AMOpc, getAL(CurDAG), |
| CurDAG->getRegister(0, MVT::i32), Chain }; |
| return CurDAG->getTargetNode(Opcode, Op.getDebugLoc(), MVT::i32, MVT::i32, |
| MVT::Other, Ops, 6); |
| } |
| |
| return NULL; |
| } |
| |
| SDNode *ARMDAGToDAGISel::SelectT2IndexedLoad(SDValue Op) { |
| LoadSDNode *LD = cast<LoadSDNode>(Op); |
| ISD::MemIndexedMode AM = LD->getAddressingMode(); |
| if (AM == ISD::UNINDEXED) |
| return NULL; |
| |
| EVT LoadedVT = LD->getMemoryVT(); |
| bool isSExtLd = LD->getExtensionType() == ISD::SEXTLOAD; |
| SDValue Offset; |
| bool isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC); |
| unsigned Opcode = 0; |
| bool Match = false; |
| if (SelectT2AddrModeImm8Offset(Op, LD->getOffset(), Offset)) { |
| switch (LoadedVT.getSimpleVT().SimpleTy) { |
| case MVT::i32: |
| Opcode = isPre ? ARM::t2LDR_PRE : ARM::t2LDR_POST; |
| break; |
| case MVT::i16: |
| if (isSExtLd) |
| Opcode = isPre ? ARM::t2LDRSH_PRE : ARM::t2LDRSH_POST; |
| else |
| Opcode = isPre ? ARM::t2LDRH_PRE : ARM::t2LDRH_POST; |
| break; |
| case MVT::i8: |
| case MVT::i1: |
| if (isSExtLd) |
| Opcode = isPre ? ARM::t2LDRSB_PRE : ARM::t2LDRSB_POST; |
| else |
| Opcode = isPre ? ARM::t2LDRB_PRE : ARM::t2LDRB_POST; |
| break; |
| default: |
| return NULL; |
| } |
| Match = true; |
| } |
| |
| if (Match) { |
| SDValue Chain = LD->getChain(); |
| SDValue Base = LD->getBasePtr(); |
| SDValue Ops[]= { Base, Offset, getAL(CurDAG), |
| CurDAG->getRegister(0, MVT::i32), Chain }; |
| return CurDAG->getTargetNode(Opcode, Op.getDebugLoc(), MVT::i32, MVT::i32, |
| MVT::Other, Ops, 5); |
| } |
| |
| return NULL; |
| } |
| |
| SDNode *ARMDAGToDAGISel::SelectDYN_ALLOC(SDValue Op) { |
| SDNode *N = Op.getNode(); |
| DebugLoc dl = N->getDebugLoc(); |
| EVT VT = Op.getValueType(); |
| SDValue Chain = Op.getOperand(0); |
| SDValue Size = Op.getOperand(1); |
| SDValue Align = Op.getOperand(2); |
| SDValue SP = CurDAG->getRegister(ARM::SP, MVT::i32); |
| int32_t AlignVal = cast<ConstantSDNode>(Align)->getSExtValue(); |
| if (AlignVal < 0) |
| // We need to align the stack. Use Thumb1 tAND which is the only thumb |
| // instruction that can read and write SP. This matches to a pseudo |
| // instruction that has a chain to ensure the result is written back to |
| // the stack pointer. |
| SP = SDValue(CurDAG->getTargetNode(ARM::tANDsp, dl, VT, SP, Align), 0); |
| |
| bool isC = isa<ConstantSDNode>(Size); |
| uint32_t C = isC ? cast<ConstantSDNode>(Size)->getZExtValue() : ~0UL; |
| // Handle the most common case for both Thumb1 and Thumb2: |
| // tSUBspi - immediate is between 0 ... 508 inclusive. |
| if (C <= 508 && ((C & 3) == 0)) |
| // FIXME: tSUBspi encode scale 4 implicitly. |
| return CurDAG->SelectNodeTo(N, ARM::tSUBspi_, VT, MVT::Other, SP, |
| CurDAG->getTargetConstant(C/4, MVT::i32), |
| Chain); |
| |
| if (Subtarget->isThumb1Only()) { |
| // Use tADDspr since Thumb1 does not have a sub r, sp, r. ARMISelLowering |
| // should have negated the size operand already. FIXME: We can't insert |
| // new target independent node at this stage so we are forced to negate |
| // it earlier. Is there a better solution? |
| return CurDAG->SelectNodeTo(N, ARM::tADDspr_, VT, MVT::Other, SP, Size, |
| Chain); |
| } else if (Subtarget->isThumb2()) { |
| if (isC && Predicate_t2_so_imm(Size.getNode())) { |
| // t2SUBrSPi |
| SDValue Ops[] = { SP, CurDAG->getTargetConstant(C, MVT::i32), Chain }; |
| return CurDAG->SelectNodeTo(N, ARM::t2SUBrSPi_, VT, MVT::Other, Ops, 3); |
| } else if (isC && Predicate_imm0_4095(Size.getNode())) { |
| // t2SUBrSPi12 |
| SDValue Ops[] = { SP, CurDAG->getTargetConstant(C, MVT::i32), Chain }; |
| return CurDAG->SelectNodeTo(N, ARM::t2SUBrSPi12_, VT, MVT::Other, Ops, 3); |
| } else { |
| // t2SUBrSPs |
| SDValue Ops[] = { SP, Size, |
| getI32Imm(ARM_AM::getSORegOpc(ARM_AM::lsl,0)), Chain }; |
| return CurDAG->SelectNodeTo(N, ARM::t2SUBrSPs_, VT, MVT::Other, Ops, 4); |
| } |
| } |
| |
| // FIXME: Add ADD / SUB sp instructions for ARM. |
| return 0; |
| } |
| |
| SDNode *ARMDAGToDAGISel::Select(SDValue Op) { |
| SDNode *N = Op.getNode(); |
| DebugLoc dl = N->getDebugLoc(); |
| |
| if (N->isMachineOpcode()) |
| return NULL; // Already selected. |
| |
| switch (N->getOpcode()) { |
| default: break; |
| case ISD::Constant: { |
| unsigned Val = cast<ConstantSDNode>(N)->getZExtValue(); |
| bool UseCP = true; |
| if (Subtarget->isThumb()) { |
| if (Subtarget->hasThumb2()) |
| // Thumb2 has the MOVT instruction, so all immediates can |
| // be done with MOV + MOVT, at worst. |
| UseCP = 0; |
| else |
| UseCP = (Val > 255 && // MOV |
| ~Val > 255 && // MOV + MVN |
| !ARM_AM::isThumbImmShiftedVal(Val)); // MOV + LSL |
| } else |
| UseCP = (ARM_AM::getSOImmVal(Val) == -1 && // MOV |
| ARM_AM::getSOImmVal(~Val) == -1 && // MVN |
| !ARM_AM::isSOImmTwoPartVal(Val)); // two instrs. |
| if (UseCP) { |
| SDValue CPIdx = |
| CurDAG->getTargetConstantPool(ConstantInt::get( |
| Type::getInt32Ty(*CurDAG->getContext()), Val), |
| TLI.getPointerTy()); |
| |
| SDNode *ResNode; |
| if (Subtarget->isThumb1Only()) { |
| SDValue Pred = CurDAG->getTargetConstant(0xEULL, MVT::i32); |
| SDValue PredReg = CurDAG->getRegister(0, MVT::i32); |
| SDValue Ops[] = { CPIdx, Pred, PredReg, CurDAG->getEntryNode() }; |
| ResNode = CurDAG->getTargetNode(ARM::tLDRcp, dl, MVT::i32, MVT::Other, |
| Ops, 4); |
| } else { |
| SDValue Ops[] = { |
| CPIdx, |
| CurDAG->getRegister(0, MVT::i32), |
| CurDAG->getTargetConstant(0, MVT::i32), |
| getAL(CurDAG), |
| CurDAG->getRegister(0, MVT::i32), |
| CurDAG->getEntryNode() |
| }; |
| ResNode=CurDAG->getTargetNode(ARM::LDRcp, dl, MVT::i32, MVT::Other, |
| Ops, 6); |
| } |
| ReplaceUses(Op, SDValue(ResNode, 0)); |
| return NULL; |
| } |
| |
| // Other cases are autogenerated. |
| break; |
| } |
| case ISD::FrameIndex: { |
| // Selects to ADDri FI, 0 which in turn will become ADDri SP, imm. |
| int FI = cast<FrameIndexSDNode>(N)->getIndex(); |
| SDValue TFI = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy()); |
| if (Subtarget->isThumb1Only()) { |
| return CurDAG->SelectNodeTo(N, ARM::tADDrSPi, MVT::i32, TFI, |
| CurDAG->getTargetConstant(0, MVT::i32)); |
| } else { |
| unsigned Opc = ((Subtarget->isThumb() && Subtarget->hasThumb2()) ? |
| ARM::t2ADDri : ARM::ADDri); |
| SDValue Ops[] = { TFI, CurDAG->getTargetConstant(0, MVT::i32), |
| getAL(CurDAG), CurDAG->getRegister(0, MVT::i32), |
| CurDAG->getRegister(0, MVT::i32) }; |
| return CurDAG->SelectNodeTo(N, Opc, MVT::i32, Ops, 5); |
| } |
| } |
| case ARMISD::DYN_ALLOC: |
| return SelectDYN_ALLOC(Op); |
| case ISD::MUL: |
| if (Subtarget->isThumb1Only()) |
| break; |
| if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { |
| unsigned RHSV = C->getZExtValue(); |
| if (!RHSV) break; |
| if (isPowerOf2_32(RHSV-1)) { // 2^n+1? |
| unsigned ShImm = Log2_32(RHSV-1); |
| if (ShImm >= 32) |
| break; |
| SDValue V = Op.getOperand(0); |
| ShImm = ARM_AM::getSORegOpc(ARM_AM::lsl, ShImm); |
| SDValue ShImmOp = CurDAG->getTargetConstant(ShImm, MVT::i32); |
| SDValue Reg0 = CurDAG->getRegister(0, MVT::i32); |
| if (Subtarget->isThumb()) { |
| SDValue Ops[] = { V, V, ShImmOp, getAL(CurDAG), Reg0, Reg0 }; |
| return CurDAG->SelectNodeTo(N, ARM::t2ADDrs, MVT::i32, Ops, 6); |
| } else { |
| SDValue Ops[] = { V, V, Reg0, ShImmOp, getAL(CurDAG), Reg0, Reg0 }; |
| return CurDAG->SelectNodeTo(N, ARM::ADDrs, MVT::i32, Ops, 7); |
| } |
| } |
| if (isPowerOf2_32(RHSV+1)) { // 2^n-1? |
| unsigned ShImm = Log2_32(RHSV+1); |
| if (ShImm >= 32) |
| break; |
| SDValue V = Op.getOperand(0); |
| ShImm = ARM_AM::getSORegOpc(ARM_AM::lsl, ShImm); |
| SDValue ShImmOp = CurDAG->getTargetConstant(ShImm, MVT::i32); |
| SDValue Reg0 = CurDAG->getRegister(0, MVT::i32); |
| if (Subtarget->isThumb()) { |
| SDValue Ops[] = { V, V, ShImmOp, getAL(CurDAG), Reg0 }; |
| return CurDAG->SelectNodeTo(N, ARM::t2RSBrs, MVT::i32, Ops, 5); |
| } else { |
| SDValue Ops[] = { V, V, Reg0, ShImmOp, getAL(CurDAG), Reg0, Reg0 }; |
| return CurDAG->SelectNodeTo(N, ARM::RSBrs, MVT::i32, Ops, 7); |
| } |
| } |
| } |
| break; |
| case ARMISD::FMRRD: |
| return CurDAG->getTargetNode(ARM::FMRRD, dl, MVT::i32, MVT::i32, |
| Op.getOperand(0), getAL(CurDAG), |
| CurDAG->getRegister(0, MVT::i32)); |
| case ISD::UMUL_LOHI: { |
| if (Subtarget->isThumb1Only()) |
| break; |
| if (Subtarget->isThumb()) { |
| SDValue Ops[] = { Op.getOperand(0), Op.getOperand(1), |
| getAL(CurDAG), CurDAG->getRegister(0, MVT::i32), |
| CurDAG->getRegister(0, MVT::i32) }; |
| return CurDAG->getTargetNode(ARM::t2UMULL, dl, MVT::i32, MVT::i32, Ops,4); |
| } else { |
| SDValue Ops[] = { Op.getOperand(0), Op.getOperand(1), |
| getAL(CurDAG), CurDAG->getRegister(0, MVT::i32), |
| CurDAG->getRegister(0, MVT::i32) }; |
| return CurDAG->getTargetNode(ARM::UMULL, dl, MVT::i32, MVT::i32, Ops, 5); |
| } |
| } |
| case ISD::SMUL_LOHI: { |
| if (Subtarget->isThumb1Only()) |
| break; |
| if (Subtarget->isThumb()) { |
| SDValue Ops[] = { Op.getOperand(0), Op.getOperand(1), |
| getAL(CurDAG), CurDAG->getRegister(0, MVT::i32) }; |
| return CurDAG->getTargetNode(ARM::t2SMULL, dl, MVT::i32, MVT::i32, Ops,4); |
| } else { |
| SDValue Ops[] = { Op.getOperand(0), Op.getOperand(1), |
| getAL(CurDAG), CurDAG->getRegister(0, MVT::i32), |
| CurDAG->getRegister(0, MVT::i32) }; |
| return CurDAG->getTargetNode(ARM::SMULL, dl, MVT::i32, MVT::i32, Ops, 5); |
| } |
| } |
| case ISD::LOAD: { |
| SDNode *ResNode = 0; |
| if (Subtarget->isThumb() && Subtarget->hasThumb2()) |
| ResNode = SelectT2IndexedLoad(Op); |
| else |
| ResNode = SelectARMIndexedLoad(Op); |
| if (ResNode) |
| return ResNode; |
| // Other cases are autogenerated. |
| break; |
| } |
| case ARMISD::BRCOND: { |
| // Pattern: (ARMbrcond:void (bb:Other):$dst, (imm:i32):$cc) |
| // Emits: (Bcc:void (bb:Other):$dst, (imm:i32):$cc) |
| // Pattern complexity = 6 cost = 1 size = 0 |
| |
| // Pattern: (ARMbrcond:void (bb:Other):$dst, (imm:i32):$cc) |
| // Emits: (tBcc:void (bb:Other):$dst, (imm:i32):$cc) |
| // Pattern complexity = 6 cost = 1 size = 0 |
| |
| // Pattern: (ARMbrcond:void (bb:Other):$dst, (imm:i32):$cc) |
| // Emits: (t2Bcc:void (bb:Other):$dst, (imm:i32):$cc) |
| // Pattern complexity = 6 cost = 1 size = 0 |
| |
| unsigned Opc = Subtarget->isThumb() ? |
| ((Subtarget->hasThumb2()) ? ARM::t2Bcc : ARM::tBcc) : ARM::Bcc; |
| SDValue Chain = Op.getOperand(0); |
| SDValue N1 = Op.getOperand(1); |
| SDValue N2 = Op.getOperand(2); |
| SDValue N3 = Op.getOperand(3); |
| SDValue InFlag = Op.getOperand(4); |
| assert(N1.getOpcode() == ISD::BasicBlock); |
| assert(N2.getOpcode() == ISD::Constant); |
| assert(N3.getOpcode() == ISD::Register); |
| |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N1, Tmp2, N3, Chain, InFlag }; |
| SDNode *ResNode = CurDAG->getTargetNode(Opc, dl, MVT::Other, |
| MVT::Flag, Ops, 5); |
| Chain = SDValue(ResNode, 0); |
| if (Op.getNode()->getNumValues() == 2) { |
| InFlag = SDValue(ResNode, 1); |
| ReplaceUses(SDValue(Op.getNode(), 1), InFlag); |
| } |
| ReplaceUses(SDValue(Op.getNode(), 0), SDValue(Chain.getNode(), Chain.getResNo())); |
| return NULL; |
| } |
| case ARMISD::CMOV: { |
| EVT VT = Op.getValueType(); |
| SDValue N0 = Op.getOperand(0); |
| SDValue N1 = Op.getOperand(1); |
| SDValue N2 = Op.getOperand(2); |
| SDValue N3 = Op.getOperand(3); |
| SDValue InFlag = Op.getOperand(4); |
| assert(N2.getOpcode() == ISD::Constant); |
| assert(N3.getOpcode() == ISD::Register); |
| |
| if (!Subtarget->isThumb1Only() && VT == MVT::i32) { |
| // Pattern: (ARMcmov:i32 GPR:i32:$false, so_reg:i32:$true, (imm:i32):$cc) |
| // Emits: (MOVCCs:i32 GPR:i32:$false, so_reg:i32:$true, (imm:i32):$cc) |
| // Pattern complexity = 18 cost = 1 size = 0 |
| SDValue CPTmp0; |
| SDValue CPTmp1; |
| SDValue CPTmp2; |
| if (Subtarget->isThumb()) { |
| if (SelectT2ShifterOperandReg(Op, N1, CPTmp0, CPTmp1)) { |
| unsigned SOVal = cast<ConstantSDNode>(CPTmp1)->getZExtValue(); |
| unsigned SOShOp = ARM_AM::getSORegShOp(SOVal); |
| unsigned Opc = 0; |
| switch (SOShOp) { |
| case ARM_AM::lsl: Opc = ARM::t2MOVCClsl; break; |
| case ARM_AM::lsr: Opc = ARM::t2MOVCClsr; break; |
| case ARM_AM::asr: Opc = ARM::t2MOVCCasr; break; |
| case ARM_AM::ror: Opc = ARM::t2MOVCCror; break; |
| default: |
| llvm_unreachable("Unknown so_reg opcode!"); |
| break; |
| } |
| SDValue SOShImm = |
| CurDAG->getTargetConstant(ARM_AM::getSORegOffset(SOVal), MVT::i32); |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N0, CPTmp0, SOShImm, Tmp2, N3, InFlag }; |
| return CurDAG->SelectNodeTo(Op.getNode(), Opc, MVT::i32,Ops, 6); |
| } |
| } else { |
| if (SelectShifterOperandReg(Op, N1, CPTmp0, CPTmp1, CPTmp2)) { |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N0, CPTmp0, CPTmp1, CPTmp2, Tmp2, N3, InFlag }; |
| return CurDAG->SelectNodeTo(Op.getNode(), |
| ARM::MOVCCs, MVT::i32, Ops, 7); |
| } |
| } |
| |
| // Pattern: (ARMcmov:i32 GPR:i32:$false, |
| // (imm:i32)<<P:Predicate_so_imm>>:$true, |
| // (imm:i32):$cc) |
| // Emits: (MOVCCi:i32 GPR:i32:$false, |
| // (so_imm:i32 (imm:i32):$true), (imm:i32):$cc) |
| // Pattern complexity = 10 cost = 1 size = 0 |
| if (N3.getOpcode() == ISD::Constant) { |
| if (Subtarget->isThumb()) { |
| if (Predicate_t2_so_imm(N3.getNode())) { |
| SDValue Tmp1 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N1)->getZExtValue()), |
| MVT::i32); |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N0, Tmp1, Tmp2, N3, InFlag }; |
| return CurDAG->SelectNodeTo(Op.getNode(), |
| ARM::t2MOVCCi, MVT::i32, Ops, 5); |
| } |
| } else { |
| if (Predicate_so_imm(N3.getNode())) { |
| SDValue Tmp1 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N1)->getZExtValue()), |
| MVT::i32); |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N0, Tmp1, Tmp2, N3, InFlag }; |
| return CurDAG->SelectNodeTo(Op.getNode(), |
| ARM::MOVCCi, MVT::i32, Ops, 5); |
| } |
| } |
| } |
| } |
| |
| // Pattern: (ARMcmov:i32 GPR:i32:$false, GPR:i32:$true, (imm:i32):$cc) |
| // Emits: (MOVCCr:i32 GPR:i32:$false, GPR:i32:$true, (imm:i32):$cc) |
| // Pattern complexity = 6 cost = 1 size = 0 |
| // |
| // Pattern: (ARMcmov:i32 GPR:i32:$false, GPR:i32:$true, (imm:i32):$cc) |
| // Emits: (tMOVCCr:i32 GPR:i32:$false, GPR:i32:$true, (imm:i32):$cc) |
| // Pattern complexity = 6 cost = 11 size = 0 |
| // |
| // Also FCPYScc and FCPYDcc. |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N0, N1, Tmp2, N3, InFlag }; |
| unsigned Opc = 0; |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: assert(false && "Illegal conditional move type!"); |
| break; |
| case MVT::i32: |
| Opc = Subtarget->isThumb() |
| ? (Subtarget->hasThumb2() ? ARM::t2MOVCCr : ARM::tMOVCCr_pseudo) |
| : ARM::MOVCCr; |
| break; |
| case MVT::f32: |
| Opc = ARM::FCPYScc; |
| break; |
| case MVT::f64: |
| Opc = ARM::FCPYDcc; |
| break; |
| } |
| return CurDAG->SelectNodeTo(Op.getNode(), Opc, VT, Ops, 5); |
| } |
| case ARMISD::CNEG: { |
| EVT VT = Op.getValueType(); |
| SDValue N0 = Op.getOperand(0); |
| SDValue N1 = Op.getOperand(1); |
| SDValue N2 = Op.getOperand(2); |
| SDValue N3 = Op.getOperand(3); |
| SDValue InFlag = Op.getOperand(4); |
| assert(N2.getOpcode() == ISD::Constant); |
| assert(N3.getOpcode() == ISD::Register); |
| |
| SDValue Tmp2 = CurDAG->getTargetConstant(((unsigned) |
| cast<ConstantSDNode>(N2)->getZExtValue()), |
| MVT::i32); |
| SDValue Ops[] = { N0, N1, Tmp2, N3, InFlag }; |
| unsigned Opc = 0; |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: assert(false && "Illegal conditional move type!"); |
| break; |
| case MVT::f32: |
| Opc = ARM::FNEGScc; |
| break; |
| case MVT::f64: |
| Opc = ARM::FNEGDcc; |
| break; |
| } |
| return CurDAG->SelectNodeTo(Op.getNode(), Opc, VT, Ops, 5); |
| } |
| |
| case ISD::DECLARE: { |
| SDValue Chain = Op.getOperand(0); |
| SDValue N1 = Op.getOperand(1); |
| SDValue N2 = Op.getOperand(2); |
| FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(N1); |
| // FIXME: handle VLAs. |
| if (!FINode) { |
| ReplaceUses(Op.getValue(0), Chain); |
| return NULL; |
| } |
| if (N2.getOpcode() == ARMISD::PIC_ADD && isa<LoadSDNode>(N2.getOperand(0))) |
| N2 = N2.getOperand(0); |
| LoadSDNode *Ld = dyn_cast<LoadSDNode>(N2); |
| if (!Ld) { |
| ReplaceUses(Op.getValue(0), Chain); |
| return NULL; |
| } |
| SDValue BasePtr = Ld->getBasePtr(); |
| assert(BasePtr.getOpcode() == ARMISD::Wrapper && |
| isa<ConstantPoolSDNode>(BasePtr.getOperand(0)) && |
| "llvm.dbg.variable should be a constantpool node"); |
| ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(BasePtr.getOperand(0)); |
| GlobalValue *GV = 0; |
| if (CP->isMachineConstantPoolEntry()) { |
| ARMConstantPoolValue *ACPV = (ARMConstantPoolValue*)CP->getMachineCPVal(); |
| GV = ACPV->getGV(); |
| } else |
| GV = dyn_cast<GlobalValue>(CP->getConstVal()); |
| if (!GV) { |
| ReplaceUses(Op.getValue(0), Chain); |
| return NULL; |
| } |
| |
| SDValue Tmp1 = CurDAG->getTargetFrameIndex(FINode->getIndex(), |
| TLI.getPointerTy()); |
| SDValue Tmp2 = CurDAG->getTargetGlobalAddress(GV, TLI.getPointerTy()); |
| SDValue Ops[] = { Tmp1, Tmp2, Chain }; |
| return CurDAG->getTargetNode(TargetInstrInfo::DECLARE, dl, |
| MVT::Other, Ops, 3); |
| } |
| |
| case ARMISD::VLD2D: { |
| SDValue MemAddr, MemUpdate, MemOpc; |
| if (!SelectAddrMode6(Op, N->getOperand(1), MemAddr, MemUpdate, MemOpc)) |
| return NULL; |
| unsigned Opc = 0; |
| EVT VT = Op.getValueType(); |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: llvm_unreachable("unhandled VLD2D type"); |
| case MVT::v8i8: Opc = ARM::VLD2d8; break; |
| case MVT::v4i16: Opc = ARM::VLD2d16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VLD2d32; break; |
| } |
| SDValue Chain = N->getOperand(0); |
| const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc, Chain }; |
| return CurDAG->getTargetNode(Opc, dl, VT, VT, MVT::Other, Ops, 4); |
| } |
| |
| case ARMISD::VLD3D: { |
| SDValue MemAddr, MemUpdate, MemOpc; |
| if (!SelectAddrMode6(Op, N->getOperand(1), MemAddr, MemUpdate, MemOpc)) |
| return NULL; |
| unsigned Opc = 0; |
| EVT VT = Op.getValueType(); |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: llvm_unreachable("unhandled VLD3D type"); |
| case MVT::v8i8: Opc = ARM::VLD3d8; break; |
| case MVT::v4i16: Opc = ARM::VLD3d16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VLD3d32; break; |
| } |
| SDValue Chain = N->getOperand(0); |
| const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc, Chain }; |
| return CurDAG->getTargetNode(Opc, dl, VT, VT, VT, MVT::Other, Ops, 4); |
| } |
| |
| case ARMISD::VLD4D: { |
| SDValue MemAddr, MemUpdate, MemOpc; |
| if (!SelectAddrMode6(Op, N->getOperand(1), MemAddr, MemUpdate, MemOpc)) |
| return NULL; |
| unsigned Opc = 0; |
| EVT VT = Op.getValueType(); |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: llvm_unreachable("unhandled VLD4D type"); |
| case MVT::v8i8: Opc = ARM::VLD4d8; break; |
| case MVT::v4i16: Opc = ARM::VLD4d16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VLD4d32; break; |
| } |
| SDValue Chain = N->getOperand(0); |
| const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc, Chain }; |
| std::vector<EVT> ResTys(4, VT); |
| ResTys.push_back(MVT::Other); |
| return CurDAG->getTargetNode(Opc, dl, ResTys, Ops, 4); |
| } |
| |
| case ARMISD::VST2D: { |
| SDValue MemAddr, MemUpdate, MemOpc; |
| if (!SelectAddrMode6(Op, N->getOperand(1), MemAddr, MemUpdate, MemOpc)) |
| return NULL; |
| unsigned Opc = 0; |
| switch (N->getOperand(2).getValueType().getSimpleVT().SimpleTy) { |
| default: llvm_unreachable("unhandled VST2D type"); |
| case MVT::v8i8: Opc = ARM::VST2d8; break; |
| case MVT::v4i16: Opc = ARM::VST2d16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VST2d32; break; |
| } |
| SDValue Chain = N->getOperand(0); |
| const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc, |
| N->getOperand(2), N->getOperand(3), Chain }; |
| return CurDAG->getTargetNode(Opc, dl, MVT::Other, Ops, 6); |
| } |
| |
| case ARMISD::VST3D: { |
| SDValue MemAddr, MemUpdate, MemOpc; |
| if (!SelectAddrMode6(Op, N->getOperand(1), MemAddr, MemUpdate, MemOpc)) |
| return NULL; |
| unsigned Opc = 0; |
| switch (N->getOperand(2).getValueType().getSimpleVT().SimpleTy) { |
| default: llvm_unreachable("unhandled VST3D type"); |
| case MVT::v8i8: Opc = ARM::VST3d8; break; |
| case MVT::v4i16: Opc = ARM::VST3d16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VST3d32; break; |
| } |
| SDValue Chain = N->getOperand(0); |
| const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc, |
| N->getOperand(2), N->getOperand(3), |
| N->getOperand(4), Chain }; |
| return CurDAG->getTargetNode(Opc, dl, MVT::Other, Ops, 7); |
| } |
| |
| case ARMISD::VST4D: { |
| SDValue MemAddr, MemUpdate, MemOpc; |
| if (!SelectAddrMode6(Op, N->getOperand(1), MemAddr, MemUpdate, MemOpc)) |
| return NULL; |
| unsigned Opc = 0; |
| switch (N->getOperand(2).getValueType().getSimpleVT().SimpleTy) { |
| default: llvm_unreachable("unhandled VST4D type"); |
| case MVT::v8i8: Opc = ARM::VST4d8; break; |
| case MVT::v4i16: Opc = ARM::VST4d16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VST4d32; break; |
| } |
| SDValue Chain = N->getOperand(0); |
| const SDValue Ops[] = { MemAddr, MemUpdate, MemOpc, |
| N->getOperand(2), N->getOperand(3), |
| N->getOperand(4), N->getOperand(5), Chain }; |
| return CurDAG->getTargetNode(Opc, dl, MVT::Other, Ops, 8); |
| } |
| case ARMISD::VZIP: { |
| unsigned Opc = 0; |
| EVT VT = N->getValueType(0); |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: return NULL; |
| case MVT::v8i8: Opc = ARM::VZIPd8; break; |
| case MVT::v4i16: Opc = ARM::VZIPd16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VZIPd32; break; |
| case MVT::v16i8: Opc = ARM::VZIPq8; break; |
| case MVT::v8i16: Opc = ARM::VZIPq16; break; |
| case MVT::v4f32: |
| case MVT::v4i32: Opc = ARM::VZIPq32; break; |
| } |
| return CurDAG->getTargetNode(Opc, dl, VT, VT, |
| N->getOperand(0), N->getOperand(1)); |
| } |
| case ARMISD::VUZP: { |
| unsigned Opc = 0; |
| EVT VT = N->getValueType(0); |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: return NULL; |
| case MVT::v8i8: Opc = ARM::VUZPd8; break; |
| case MVT::v4i16: Opc = ARM::VUZPd16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VUZPd32; break; |
| case MVT::v16i8: Opc = ARM::VUZPq8; break; |
| case MVT::v8i16: Opc = ARM::VUZPq16; break; |
| case MVT::v4f32: |
| case MVT::v4i32: Opc = ARM::VUZPq32; break; |
| } |
| return CurDAG->getTargetNode(Opc, dl, VT, VT, |
| N->getOperand(0), N->getOperand(1)); |
| } |
| case ARMISD::VTRN: { |
| unsigned Opc = 0; |
| EVT VT = N->getValueType(0); |
| switch (VT.getSimpleVT().SimpleTy) { |
| default: return NULL; |
| case MVT::v8i8: Opc = ARM::VTRNd8; break; |
| case MVT::v4i16: Opc = ARM::VTRNd16; break; |
| case MVT::v2f32: |
| case MVT::v2i32: Opc = ARM::VTRNd32; break; |
| case MVT::v16i8: Opc = ARM::VTRNq8; break; |
| case MVT::v8i16: Opc = ARM::VTRNq16; break; |
| case MVT::v4f32: |
| case MVT::v4i32: Opc = ARM::VTRNq32; break; |
| } |
| return CurDAG->getTargetNode(Opc, dl, VT, VT, |
| N->getOperand(0), N->getOperand(1)); |
| } |
| } |
| |
| return SelectCode(Op); |
| } |
| |
| bool ARMDAGToDAGISel:: |
| SelectInlineAsmMemoryOperand(const SDValue &Op, char ConstraintCode, |
| std::vector<SDValue> &OutOps) { |
| assert(ConstraintCode == 'm' && "unexpected asm memory constraint"); |
| |
| SDValue Base, Offset, Opc; |
| if (!SelectAddrMode2(Op, Op, Base, Offset, Opc)) |
| return true; |
| |
| OutOps.push_back(Base); |
| OutOps.push_back(Offset); |
| OutOps.push_back(Opc); |
| return false; |
| } |
| |
| /// createARMISelDag - This pass converts a legalized DAG into a |
| /// ARM-specific DAG, ready for instruction scheduling. |
| /// |
| FunctionPass *llvm::createARMISelDag(ARMBaseTargetMachine &TM) { |
| return new ARMDAGToDAGISel(TM); |
| } |
