| //===-- ARMISelLowering.h - ARM DAG Lowering Interface ----------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the interfaces that ARM uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef ARMISELLOWERING_H |
| #define ARMISELLOWERING_H |
| |
| #include "ARMSubtarget.h" |
| #include "llvm/Target/TargetLowering.h" |
| #include "llvm/Target/TargetRegisterInfo.h" |
| #include "llvm/CodeGen/FastISel.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/CodeGen/CallingConvLower.h" |
| #include <vector> |
| |
| namespace llvm { |
| class ARMConstantPoolValue; |
| |
| namespace ARMISD { |
| // ARM Specific DAG Nodes |
| enum NodeType { |
| // Start the numbering where the builtin ops and target ops leave off. |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| |
| Wrapper, // Wrapper - A wrapper node for TargetConstantPool, |
| // TargetExternalSymbol, and TargetGlobalAddress. |
| WrapperDYN, // WrapperDYN - A wrapper node for TargetGlobalAddress in |
| // DYN mode. |
| WrapperPIC, // WrapperPIC - A wrapper node for TargetGlobalAddress in |
| // PIC mode. |
| WrapperJT, // WrapperJT - A wrapper node for TargetJumpTable |
| |
| CALL, // Function call. |
| CALL_PRED, // Function call that's predicable. |
| CALL_NOLINK, // Function call with branch not branch-and-link. |
| tCALL, // Thumb function call. |
| BRCOND, // Conditional branch. |
| BR_JT, // Jumptable branch. |
| BR2_JT, // Jumptable branch (2 level - jumptable entry is a jump). |
| RET_FLAG, // Return with a flag operand. |
| |
| PIC_ADD, // Add with a PC operand and a PIC label. |
| |
| CMP, // ARM compare instructions. |
| CMPZ, // ARM compare that sets only Z flag. |
| CMPFP, // ARM VFP compare instruction, sets FPSCR. |
| CMPFPw0, // ARM VFP compare against zero instruction, sets FPSCR. |
| FMSTAT, // ARM fmstat instruction. |
| CMOV, // ARM conditional move instructions. |
| |
| BCC_i64, |
| |
| RBIT, // ARM bitreverse instruction |
| |
| FTOSI, // FP to sint within a FP register. |
| FTOUI, // FP to uint within a FP register. |
| SITOF, // sint to FP within a FP register. |
| UITOF, // uint to FP within a FP register. |
| |
| SRL_FLAG, // V,Flag = srl_flag X -> srl X, 1 + save carry out. |
| SRA_FLAG, // V,Flag = sra_flag X -> sra X, 1 + save carry out. |
| RRX, // V = RRX X, Flag -> srl X, 1 + shift in carry flag. |
| |
| ADDC, // Add with carry |
| ADDE, // Add using carry |
| SUBC, // Sub with carry |
| SUBE, // Sub using carry |
| |
| VMOVRRD, // double to two gprs. |
| VMOVDRR, // Two gprs to double. |
| |
| EH_SJLJ_SETJMP, // SjLj exception handling setjmp. |
| EH_SJLJ_LONGJMP, // SjLj exception handling longjmp. |
| EH_SJLJ_DISPATCHSETUP, // SjLj exception handling dispatch setup. |
| |
| TC_RETURN, // Tail call return pseudo. |
| |
| THREAD_POINTER, |
| |
| DYN_ALLOC, // Dynamic allocation on the stack. |
| |
| MEMBARRIER, // Memory barrier (DMB) |
| MEMBARRIER_MCR, // Memory barrier (MCR) |
| |
| PRELOAD, // Preload |
| |
| VCEQ, // Vector compare equal. |
| VCEQZ, // Vector compare equal to zero. |
| VCGE, // Vector compare greater than or equal. |
| VCGEZ, // Vector compare greater than or equal to zero. |
| VCLEZ, // Vector compare less than or equal to zero. |
| VCGEU, // Vector compare unsigned greater than or equal. |
| VCGT, // Vector compare greater than. |
| VCGTZ, // Vector compare greater than zero. |
| VCLTZ, // Vector compare less than zero. |
| VCGTU, // Vector compare unsigned greater than. |
| VTST, // Vector test bits. |
| |
| // Vector shift by immediate: |
| VSHL, // ...left |
| VSHRs, // ...right (signed) |
| VSHRu, // ...right (unsigned) |
| VSHLLs, // ...left long (signed) |
| VSHLLu, // ...left long (unsigned) |
| VSHLLi, // ...left long (with maximum shift count) |
| VSHRN, // ...right narrow |
| |
| // Vector rounding shift by immediate: |
| VRSHRs, // ...right (signed) |
| VRSHRu, // ...right (unsigned) |
| VRSHRN, // ...right narrow |
| |
| // Vector saturating shift by immediate: |
| VQSHLs, // ...left (signed) |
| VQSHLu, // ...left (unsigned) |
| VQSHLsu, // ...left (signed to unsigned) |
| VQSHRNs, // ...right narrow (signed) |
| VQSHRNu, // ...right narrow (unsigned) |
| VQSHRNsu, // ...right narrow (signed to unsigned) |
| |
| // Vector saturating rounding shift by immediate: |
| VQRSHRNs, // ...right narrow (signed) |
| VQRSHRNu, // ...right narrow (unsigned) |
| VQRSHRNsu, // ...right narrow (signed to unsigned) |
| |
| // Vector shift and insert: |
| VSLI, // ...left |
| VSRI, // ...right |
| |
| // Vector get lane (VMOV scalar to ARM core register) |
| // (These are used for 8- and 16-bit element types only.) |
| VGETLANEu, // zero-extend vector extract element |
| VGETLANEs, // sign-extend vector extract element |
| |
| // Vector move immediate and move negated immediate: |
| VMOVIMM, |
| VMVNIMM, |
| |
| // Vector duplicate: |
| VDUP, |
| VDUPLANE, |
| |
| // Vector shuffles: |
| VEXT, // extract |
| VREV64, // reverse elements within 64-bit doublewords |
| VREV32, // reverse elements within 32-bit words |
| VREV16, // reverse elements within 16-bit halfwords |
| VZIP, // zip (interleave) |
| VUZP, // unzip (deinterleave) |
| VTRN, // transpose |
| VTBL1, // 1-register shuffle with mask |
| VTBL2, // 2-register shuffle with mask |
| |
| // Vector multiply long: |
| VMULLs, // ...signed |
| VMULLu, // ...unsigned |
| |
| // Operands of the standard BUILD_VECTOR node are not legalized, which |
| // is fine if BUILD_VECTORs are always lowered to shuffles or other |
| // operations, but for ARM some BUILD_VECTORs are legal as-is and their |
| // operands need to be legalized. Define an ARM-specific version of |
| // BUILD_VECTOR for this purpose. |
| BUILD_VECTOR, |
| |
| // Floating-point max and min: |
| FMAX, |
| FMIN, |
| |
| // Bit-field insert |
| BFI, |
| |
| // Vector OR with immediate |
| VORRIMM, |
| // Vector AND with NOT of immediate |
| VBICIMM, |
| |
| // Vector bitwise select |
| VBSL, |
| |
| // Vector load N-element structure to all lanes: |
| VLD2DUP = ISD::FIRST_TARGET_MEMORY_OPCODE, |
| VLD3DUP, |
| VLD4DUP, |
| |
| // NEON loads with post-increment base updates: |
| VLD1_UPD, |
| VLD2_UPD, |
| VLD3_UPD, |
| VLD4_UPD, |
| VLD2LN_UPD, |
| VLD3LN_UPD, |
| VLD4LN_UPD, |
| VLD2DUP_UPD, |
| VLD3DUP_UPD, |
| VLD4DUP_UPD, |
| |
| // NEON stores with post-increment base updates: |
| VST1_UPD, |
| VST2_UPD, |
| VST3_UPD, |
| VST4_UPD, |
| VST2LN_UPD, |
| VST3LN_UPD, |
| VST4LN_UPD, |
| |
| // 64-bit atomic ops (value split into two registers) |
| ATOMADD64_DAG, |
| ATOMSUB64_DAG, |
| ATOMOR64_DAG, |
| ATOMXOR64_DAG, |
| ATOMAND64_DAG, |
| ATOMNAND64_DAG, |
| ATOMSWAP64_DAG, |
| ATOMCMPXCHG64_DAG |
| }; |
| } |
| |
| /// Define some predicates that are used for node matching. |
| namespace ARM { |
| bool isBitFieldInvertedMask(unsigned v); |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // ARMTargetLowering - ARM Implementation of the TargetLowering interface |
| |
| class ARMTargetLowering : public TargetLowering { |
| public: |
| explicit ARMTargetLowering(TargetMachine &TM); |
| |
| virtual unsigned getJumpTableEncoding(void) const; |
| |
| virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const; |
| |
| /// ReplaceNodeResults - Replace the results of node with an illegal result |
| /// type with new values built out of custom code. |
| /// |
| virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue>&Results, |
| SelectionDAG &DAG) const; |
| |
| virtual const char *getTargetNodeName(unsigned Opcode) const; |
| |
| /// getSetCCResultType - Return the value type to use for ISD::SETCC. |
| virtual EVT getSetCCResultType(EVT VT) const; |
| |
| virtual MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr *MI, |
| MachineBasicBlock *MBB) const; |
| |
| virtual void |
| AdjustInstrPostInstrSelection(MachineInstr *MI, SDNode *Node) const; |
| |
| SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const; |
| virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| |
| bool isDesirableToTransformToIntegerOp(unsigned Opc, EVT VT) const; |
| |
| /// allowsUnalignedMemoryAccesses - Returns true if the target allows |
| /// unaligned memory accesses. of the specified type. |
| /// FIXME: Add getOptimalMemOpType to implement memcpy with NEON? |
| virtual bool allowsUnalignedMemoryAccesses(EVT VT) const; |
| |
| /// isLegalAddressingMode - Return true if the addressing mode represented |
| /// by AM is legal for this target, for a load/store of the specified type. |
| virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty)const; |
| bool isLegalT2ScaledAddressingMode(const AddrMode &AM, EVT VT) const; |
| |
| /// isLegalICmpImmediate - Return true if the specified immediate is legal |
| /// icmp immediate, that is the target has icmp instructions which can |
| /// compare a register against the immediate without having to materialize |
| /// the immediate into a register. |
| virtual bool isLegalICmpImmediate(int64_t Imm) const; |
| |
| /// isLegalAddImmediate - Return true if the specified immediate is legal |
| /// add immediate, that is the target has add instructions which can |
| /// add a register and the immediate without having to materialize |
| /// the immediate into a register. |
| virtual bool isLegalAddImmediate(int64_t Imm) const; |
| |
| /// getPreIndexedAddressParts - returns true by value, base pointer and |
| /// offset pointer and addressing mode by reference if the node's address |
| /// can be legally represented as pre-indexed load / store address. |
| virtual bool getPreIndexedAddressParts(SDNode *N, SDValue &Base, |
| SDValue &Offset, |
| ISD::MemIndexedMode &AM, |
| SelectionDAG &DAG) const; |
| |
| /// getPostIndexedAddressParts - returns true by value, base pointer and |
| /// offset pointer and addressing mode by reference if this node can be |
| /// combined with a load / store to form a post-indexed load / store. |
| virtual bool getPostIndexedAddressParts(SDNode *N, SDNode *Op, |
| SDValue &Base, SDValue &Offset, |
| ISD::MemIndexedMode &AM, |
| SelectionDAG &DAG) const; |
| |
| virtual void computeMaskedBitsForTargetNode(const SDValue Op, |
| const APInt &Mask, |
| APInt &KnownZero, |
| APInt &KnownOne, |
| const SelectionDAG &DAG, |
| unsigned Depth) const; |
| |
| |
| virtual bool ExpandInlineAsm(CallInst *CI) const; |
| |
| ConstraintType getConstraintType(const std::string &Constraint) const; |
| |
| /// Examine constraint string and operand type and determine a weight value. |
| /// The operand object must already have been set up with the operand type. |
| ConstraintWeight getSingleConstraintMatchWeight( |
| AsmOperandInfo &info, const char *constraint) const; |
| |
| std::pair<unsigned, const TargetRegisterClass*> |
| getRegForInlineAsmConstraint(const std::string &Constraint, |
| EVT VT) const; |
| |
| /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops |
| /// vector. If it is invalid, don't add anything to Ops. If hasMemory is |
| /// true it means one of the asm constraint of the inline asm instruction |
| /// being processed is 'm'. |
| virtual void LowerAsmOperandForConstraint(SDValue Op, |
| std::string &Constraint, |
| std::vector<SDValue> &Ops, |
| SelectionDAG &DAG) const; |
| |
| const ARMSubtarget* getSubtarget() const { |
| return Subtarget; |
| } |
| |
| /// getRegClassFor - Return the register class that should be used for the |
| /// specified value type. |
| virtual TargetRegisterClass *getRegClassFor(EVT VT) const; |
| |
| /// getMaximalGlobalOffset - Returns the maximal possible offset which can |
| /// be used for loads / stores from the global. |
| virtual unsigned getMaximalGlobalOffset() const; |
| |
| /// createFastISel - This method returns a target specific FastISel object, |
| /// or null if the target does not support "fast" ISel. |
| virtual FastISel *createFastISel(FunctionLoweringInfo &funcInfo) const; |
| |
| Sched::Preference getSchedulingPreference(SDNode *N) const; |
| |
| bool isShuffleMaskLegal(const SmallVectorImpl<int> &M, EVT VT) const; |
| bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const; |
| |
| /// isFPImmLegal - Returns true if the target can instruction select the |
| /// specified FP immediate natively. If false, the legalizer will |
| /// materialize the FP immediate as a load from a constant pool. |
| virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const; |
| |
| virtual bool getTgtMemIntrinsic(IntrinsicInfo &Info, |
| const CallInst &I, |
| unsigned Intrinsic) const; |
| protected: |
| std::pair<const TargetRegisterClass*, uint8_t> |
| findRepresentativeClass(EVT VT) const; |
| |
| private: |
| /// 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; |
| |
| const TargetRegisterInfo *RegInfo; |
| |
| const InstrItineraryData *Itins; |
| |
| /// ARMPCLabelIndex - Keep track of the number of ARM PC labels created. |
| /// |
| unsigned ARMPCLabelIndex; |
| |
| void addTypeForNEON(EVT VT, EVT PromotedLdStVT, EVT PromotedBitwiseVT); |
| void addDRTypeForNEON(EVT VT); |
| void addQRTypeForNEON(EVT VT); |
| |
| typedef SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPassVector; |
| void PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG, |
| SDValue Chain, SDValue &Arg, |
| RegsToPassVector &RegsToPass, |
| CCValAssign &VA, CCValAssign &NextVA, |
| SDValue &StackPtr, |
| SmallVector<SDValue, 8> &MemOpChains, |
| ISD::ArgFlagsTy Flags) const; |
| SDValue GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA, |
| SDValue &Root, SelectionDAG &DAG, |
| DebugLoc dl) const; |
| |
| CCAssignFn *CCAssignFnForNode(CallingConv::ID CC, bool Return, |
| bool isVarArg) const; |
| SDValue LowerMemOpCallTo(SDValue Chain, SDValue StackPtr, SDValue Arg, |
| DebugLoc dl, SelectionDAG &DAG, |
| const CCValAssign &VA, |
| ISD::ArgFlagsTy Flags) const; |
| SDValue LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerEH_SJLJ_DISPATCHSETUP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG, |
| const ARMSubtarget *Subtarget) const; |
| SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalAddressDarwin(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalAddressELF(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA, |
| SelectionDAG &DAG) const; |
| SDValue LowerToTLSExecModels(GlobalAddressSDNode *GA, |
| SelectionDAG &DAG) const; |
| SDValue LowerGLOBAL_OFFSET_TABLE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBR_JT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSELECT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerShiftRightParts(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerShiftLeftParts(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG, |
| const ARMSubtarget *ST) const; |
| |
| SDValue ReconstructShuffle(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerCallResult(SDValue Chain, SDValue InFlag, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| DebugLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| virtual SDValue |
| LowerFormalArguments(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| DebugLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| void VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG, |
| DebugLoc dl, SDValue &Chain, unsigned ArgOffset) |
| const; |
| |
| void computeRegArea(CCState &CCInfo, MachineFunction &MF, |
| unsigned &VARegSize, unsigned &VARegSaveSize) const; |
| |
| virtual SDValue |
| LowerCall(SDValue Chain, SDValue Callee, |
| CallingConv::ID CallConv, bool isVarArg, |
| bool &isTailCall, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| DebugLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| /// HandleByVal - Target-specific cleanup for ByVal support. |
| virtual void HandleByVal(CCState *, unsigned &) const; |
| |
| /// IsEligibleForTailCallOptimization - Check whether the call is eligible |
| /// for tail call optimization. Targets which want to do tail call |
| /// optimization should implement this function. |
| bool IsEligibleForTailCallOptimization(SDValue Callee, |
| CallingConv::ID CalleeCC, |
| bool isVarArg, |
| bool isCalleeStructRet, |
| bool isCallerStructRet, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SelectionDAG& DAG) const; |
| virtual SDValue |
| LowerReturn(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, |
| DebugLoc dl, SelectionDAG &DAG) const; |
| |
| virtual bool isUsedByReturnOnly(SDNode *N) const; |
| |
| virtual bool mayBeEmittedAsTailCall(CallInst *CI) const; |
| |
| SDValue getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC, |
| SDValue &ARMcc, SelectionDAG &DAG, DebugLoc dl) const; |
| SDValue getVFPCmp(SDValue LHS, SDValue RHS, |
| SelectionDAG &DAG, DebugLoc dl) const; |
| SDValue duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const; |
| |
| SDValue OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const; |
| |
| MachineBasicBlock *EmitAtomicCmpSwap(MachineInstr *MI, |
| MachineBasicBlock *BB, |
| unsigned Size) const; |
| MachineBasicBlock *EmitAtomicBinary(MachineInstr *MI, |
| MachineBasicBlock *BB, |
| unsigned Size, |
| unsigned BinOpcode) const; |
| MachineBasicBlock *EmitAtomicBinary64(MachineInstr *MI, |
| MachineBasicBlock *BB, |
| unsigned Op1, |
| unsigned Op2, |
| bool NeedsCarry = false, |
| bool IsCmpxchg = false) const; |
| MachineBasicBlock * EmitAtomicBinaryMinMax(MachineInstr *MI, |
| MachineBasicBlock *BB, |
| unsigned Size, |
| bool signExtend, |
| ARMCC::CondCodes Cond) const; |
| |
| void EmitBasePointerRecalculation(MachineInstr *MI, MachineBasicBlock *MBB, |
| MachineBasicBlock *DispatchBB) const; |
| |
| void SetupEntryBlockForSjLj(MachineInstr *MI, |
| MachineBasicBlock *MBB, |
| MachineBasicBlock *DispatchBB, int FI) const; |
| |
| MachineBasicBlock *EmitSjLjDispatchBlock(MachineInstr *MI, |
| MachineBasicBlock *MBB) const; |
| |
| bool RemapAddSubWithFlags(MachineInstr *MI, MachineBasicBlock *BB) const; |
| }; |
| |
| enum NEONModImmType { |
| VMOVModImm, |
| VMVNModImm, |
| OtherModImm |
| }; |
| |
| |
| namespace ARM { |
| FastISel *createFastISel(FunctionLoweringInfo &funcInfo); |
| } |
| } |
| |
| #endif // ARMISELLOWERING_H |
