| //===-- MipsISelLowering.h - Mips 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 Mips uses to lower LLVM code into a |
| // selection DAG. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef MipsISELLOWERING_H |
| #define MipsISELLOWERING_H |
| |
| #include "Mips.h" |
| #include "MipsSubtarget.h" |
| #include "llvm/CodeGen/CallingConvLower.h" |
| #include "llvm/CodeGen/SelectionDAG.h" |
| #include "llvm/IR/Function.h" |
| #include "llvm/Target/TargetLowering.h" |
| #include <deque> |
| #include <string> |
| |
| namespace llvm { |
| namespace MipsISD { |
| enum NodeType { |
| // Start the numbering from where ISD NodeType finishes. |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| |
| // Jump and link (call) |
| JmpLink, |
| |
| // Tail call |
| TailCall, |
| |
| // Get the Higher 16 bits from a 32-bit immediate |
| // No relation with Mips Hi register |
| Hi, |
| |
| // Get the Lower 16 bits from a 32-bit immediate |
| // No relation with Mips Lo register |
| Lo, |
| |
| // Handle gp_rel (small data/bss sections) relocation. |
| GPRel, |
| |
| // Thread Pointer |
| ThreadPointer, |
| |
| // Floating Point Branch Conditional |
| FPBrcond, |
| |
| // Floating Point Compare |
| FPCmp, |
| |
| // Floating Point Conditional Moves |
| CMovFP_T, |
| CMovFP_F, |
| |
| // Floating Point Rounding |
| FPRound, |
| |
| // Return |
| Ret, |
| |
| EH_RETURN, |
| |
| // MAdd/Sub nodes |
| MAdd, |
| MAddu, |
| MSub, |
| MSubu, |
| |
| // DivRem(u) |
| DivRem, |
| DivRemU, |
| |
| BuildPairF64, |
| ExtractElementF64, |
| |
| Wrapper, |
| |
| DynAlloc, |
| |
| Sync, |
| |
| Ext, |
| Ins, |
| |
| // EXTR.W instrinsic nodes. |
| EXTP, |
| EXTPDP, |
| EXTR_S_H, |
| EXTR_W, |
| EXTR_R_W, |
| EXTR_RS_W, |
| SHILO, |
| MTHLIP, |
| |
| // DPA.W intrinsic nodes. |
| MULSAQ_S_W_PH, |
| MAQ_S_W_PHL, |
| MAQ_S_W_PHR, |
| MAQ_SA_W_PHL, |
| MAQ_SA_W_PHR, |
| DPAU_H_QBL, |
| DPAU_H_QBR, |
| DPSU_H_QBL, |
| DPSU_H_QBR, |
| DPAQ_S_W_PH, |
| DPSQ_S_W_PH, |
| DPAQ_SA_L_W, |
| DPSQ_SA_L_W, |
| DPA_W_PH, |
| DPS_W_PH, |
| DPAQX_S_W_PH, |
| DPAQX_SA_W_PH, |
| DPAX_W_PH, |
| DPSX_W_PH, |
| DPSQX_S_W_PH, |
| DPSQX_SA_W_PH, |
| MULSA_W_PH, |
| |
| MULT, |
| MULTU, |
| MADD_DSP, |
| MADDU_DSP, |
| MSUB_DSP, |
| MSUBU_DSP, |
| |
| // Load/Store Left/Right nodes. |
| LWL = ISD::FIRST_TARGET_MEMORY_OPCODE, |
| LWR, |
| SWL, |
| SWR, |
| LDL, |
| LDR, |
| SDL, |
| SDR |
| }; |
| } |
| |
| //===--------------------------------------------------------------------===// |
| // TargetLowering Implementation |
| //===--------------------------------------------------------------------===// |
| class MipsFunctionInfo; |
| |
| class MipsTargetLowering : public TargetLowering { |
| public: |
| explicit MipsTargetLowering(MipsTargetMachine &TM); |
| |
| virtual MVT getScalarShiftAmountTy(EVT LHSTy) const { return MVT::i32; } |
| |
| virtual bool allowsUnalignedMemoryAccesses (EVT VT, bool *Fast) const; |
| |
| virtual void LowerOperationWrapper(SDNode *N, |
| SmallVectorImpl<SDValue> &Results, |
| SelectionDAG &DAG) const; |
| |
| /// LowerOperation - Provide custom lowering hooks for some operations. |
| 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; |
| |
| /// getTargetNodeName - This method returns the name of a target specific |
| // DAG node. |
| virtual const char *getTargetNodeName(unsigned Opcode) const; |
| |
| /// getSetCCResultType - get the ISD::SETCC result ValueType |
| EVT getSetCCResultType(EVT VT) const; |
| |
| virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| private: |
| |
| void setMips16LibcallName(RTLIB::Libcall, const char *Name); |
| |
| void setMips16HardFloatLibCalls(); |
| |
| unsigned int |
| getMips16HelperFunctionStubNumber(ArgListTy &Args) const; |
| |
| const char *getMips16HelperFunction |
| (Type* RetTy, ArgListTy &Args, bool &needHelper) const; |
| |
| /// ByValArgInfo - Byval argument information. |
| struct ByValArgInfo { |
| unsigned FirstIdx; // Index of the first register used. |
| unsigned NumRegs; // Number of registers used for this argument. |
| unsigned Address; // Offset of the stack area used to pass this argument. |
| |
| ByValArgInfo() : FirstIdx(0), NumRegs(0), Address(0) {} |
| }; |
| |
| /// MipsCC - This class provides methods used to analyze formal and call |
| /// arguments and inquire about calling convention information. |
| class MipsCC { |
| public: |
| MipsCC(CallingConv::ID CallConv, bool IsO32, CCState &Info); |
| |
| void analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs, |
| bool IsVarArg, bool IsSoftFloat, |
| const SDNode *CallNode, |
| std::vector<ArgListEntry> &FuncArgs); |
| void analyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins, |
| bool IsSoftFloat, |
| Function::const_arg_iterator FuncArg); |
| |
| void analyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins, |
| bool IsSoftFloat, const SDNode *CallNode, |
| const Type *RetTy) const; |
| |
| void analyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs, |
| bool IsSoftFloat, const Type *RetTy) const; |
| |
| const CCState &getCCInfo() const { return CCInfo; } |
| |
| /// hasByValArg - Returns true if function has byval arguments. |
| bool hasByValArg() const { return !ByValArgs.empty(); } |
| |
| /// regSize - Size (in number of bits) of integer registers. |
| unsigned regSize() const { return IsO32 ? 4 : 8; } |
| |
| /// numIntArgRegs - Number of integer registers available for calls. |
| unsigned numIntArgRegs() const; |
| |
| /// reservedArgArea - The size of the area the caller reserves for |
| /// register arguments. This is 16-byte if ABI is O32. |
| unsigned reservedArgArea() const; |
| |
| /// Return pointer to array of integer argument registers. |
| const uint16_t *intArgRegs() const; |
| |
| typedef SmallVector<ByValArgInfo, 2>::const_iterator byval_iterator; |
| byval_iterator byval_begin() const { return ByValArgs.begin(); } |
| byval_iterator byval_end() const { return ByValArgs.end(); } |
| |
| private: |
| void handleByValArg(unsigned ValNo, MVT ValVT, MVT LocVT, |
| CCValAssign::LocInfo LocInfo, |
| ISD::ArgFlagsTy ArgFlags); |
| |
| /// useRegsForByval - Returns true if the calling convention allows the |
| /// use of registers to pass byval arguments. |
| bool useRegsForByval() const { return CallConv != CallingConv::Fast; } |
| |
| /// Return the function that analyzes fixed argument list functions. |
| llvm::CCAssignFn *fixedArgFn() const; |
| |
| /// Return the function that analyzes variable argument list functions. |
| llvm::CCAssignFn *varArgFn() const; |
| |
| const uint16_t *shadowRegs() const; |
| |
| void allocateRegs(ByValArgInfo &ByVal, unsigned ByValSize, |
| unsigned Align); |
| |
| /// Return the type of the register which is used to pass an argument or |
| /// return a value. This function returns f64 if the argument is an i64 |
| /// value which has been generated as a result of softening an f128 value. |
| /// Otherwise, it just returns VT. |
| MVT getRegVT(MVT VT, const Type *OrigTy, const SDNode *CallNode, |
| bool IsSoftFloat) const; |
| |
| template<typename Ty> |
| void analyzeReturn(const SmallVectorImpl<Ty> &RetVals, bool IsSoftFloat, |
| const SDNode *CallNode, const Type *RetTy) const; |
| |
| CCState &CCInfo; |
| CallingConv::ID CallConv; |
| bool IsO32; |
| SmallVector<ByValArgInfo, 2> ByValArgs; |
| }; |
| |
| // Subtarget Info |
| const MipsSubtarget *Subtarget; |
| |
| bool HasMips64, IsN64, IsO32; |
| |
| // Lower Operand helpers |
| SDValue LowerCallResult(SDValue Chain, SDValue InFlag, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| DebugLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals, |
| const SDNode *CallNode, const Type *RetTy) const; |
| |
| // Lower Operand specifics |
| SDValue lowerBR_JT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerBRCOND(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerConstantPool(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerBlockAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerJumpTable(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSELECT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSETCC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerVASTART(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFABS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerMEMBARRIER(SDValue Op, SelectionDAG& DAG) const; |
| SDValue lowerATOMIC_FENCE(SDValue Op, SelectionDAG& DAG) const; |
| SDValue lowerShiftLeftParts(SDValue Op, SelectionDAG& DAG) const; |
| SDValue lowerShiftRightParts(SDValue Op, SelectionDAG& DAG, |
| bool IsSRA) const; |
| SDValue lowerLOAD(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerSTORE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| SDValue lowerADD(SDValue Op, SelectionDAG &DAG) const; |
| |
| /// isEligibleForTailCallOptimization - Check whether the call is eligible |
| /// for tail call optimization. |
| bool isEligibleForTailCallOptimization(const MipsCC &MipsCCInfo, |
| unsigned NextStackOffset, |
| const MipsFunctionInfo& FI) const; |
| |
| /// copyByValArg - Copy argument registers which were used to pass a byval |
| /// argument to the stack. Create a stack frame object for the byval |
| /// argument. |
| void copyByValRegs(SDValue Chain, DebugLoc DL, |
| std::vector<SDValue> &OutChains, SelectionDAG &DAG, |
| const ISD::ArgFlagsTy &Flags, |
| SmallVectorImpl<SDValue> &InVals, |
| const Argument *FuncArg, |
| const MipsCC &CC, const ByValArgInfo &ByVal) const; |
| |
| /// passByValArg - Pass a byval argument in registers or on stack. |
| void passByValArg(SDValue Chain, DebugLoc DL, |
| std::deque< std::pair<unsigned, SDValue> > &RegsToPass, |
| SmallVector<SDValue, 8> &MemOpChains, SDValue StackPtr, |
| MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg, |
| const MipsCC &CC, const ByValArgInfo &ByVal, |
| const ISD::ArgFlagsTy &Flags, bool isLittle) const; |
| |
| /// writeVarArgRegs - Write variable function arguments passed in registers |
| /// to the stack. Also create a stack frame object for the first variable |
| /// argument. |
| void writeVarArgRegs(std::vector<SDValue> &OutChains, const MipsCC &CC, |
| SDValue Chain, DebugLoc DL, SelectionDAG &DAG) const; |
| |
| virtual SDValue |
| LowerFormalArguments(SDValue Chain, |
| CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| DebugLoc dl, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| SDValue passArgOnStack(SDValue StackPtr, unsigned Offset, SDValue Chain, |
| SDValue Arg, DebugLoc DL, bool IsTailCall, |
| SelectionDAG &DAG) const; |
| |
| virtual SDValue |
| LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const; |
| |
| virtual bool |
| CanLowerReturn(CallingConv::ID CallConv, MachineFunction &MF, |
| bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| LLVMContext &Context) 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 MachineBasicBlock * |
| EmitInstrWithCustomInserter(MachineInstr *MI, |
| MachineBasicBlock *MBB) const; |
| |
| // Inline asm support |
| 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; |
| |
| virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const; |
| |
| virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const; |
| |
| virtual EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign, |
| unsigned SrcAlign, |
| bool IsMemset, bool ZeroMemset, |
| bool MemcpyStrSrc, |
| MachineFunction &MF) 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 unsigned getJumpTableEncoding() const; |
| |
| MachineBasicBlock *emitBPOSGE32(MachineInstr *MI, |
| MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB, |
| unsigned Size, unsigned BinOpcode, bool Nand = false) const; |
| MachineBasicBlock *emitAtomicBinaryPartword(MachineInstr *MI, |
| MachineBasicBlock *BB, unsigned Size, unsigned BinOpcode, |
| bool Nand = false) const; |
| MachineBasicBlock *emitAtomicCmpSwap(MachineInstr *MI, |
| MachineBasicBlock *BB, unsigned Size) const; |
| MachineBasicBlock *emitAtomicCmpSwapPartword(MachineInstr *MI, |
| MachineBasicBlock *BB, unsigned Size) const; |
| MachineBasicBlock *emitSel16(unsigned Opc, MachineInstr *MI, |
| MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitSeliT16(unsigned Opc1, unsigned Opc2, |
| MachineInstr *MI, |
| MachineBasicBlock *BB) const; |
| |
| MachineBasicBlock *emitSelT16(unsigned Opc1, unsigned Opc2, |
| MachineInstr *MI, |
| MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitFEXT_T8I816_ins(unsigned BtOpc, unsigned CmpOpc, |
| MachineInstr *MI, |
| MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitFEXT_T8I8I16_ins( |
| unsigned BtOpc, unsigned CmpiOpc, unsigned CmpiXOpc, |
| MachineInstr *MI, MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitFEXT_CCRX16_ins( |
| unsigned SltOpc, |
| MachineInstr *MI, MachineBasicBlock *BB) const; |
| MachineBasicBlock *emitFEXT_CCRXI16_ins( |
| unsigned SltiOpc, unsigned SltiXOpc, |
| MachineInstr *MI, MachineBasicBlock *BB )const; |
| |
| }; |
| } |
| |
| #endif // MipsISELLOWERING_H |