| //===-- AMDGPUISelLowering.h - AMDGPU Lowering Interface --------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// \file |
| /// \brief Interface definition of the TargetLowering class that is common |
| /// to all AMD GPUs. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUISELLOWERING_H |
| #define LLVM_LIB_TARGET_AMDGPU_AMDGPUISELLOWERING_H |
| |
| #include "llvm/Target/TargetLowering.h" |
| |
| namespace llvm { |
| |
| class AMDGPUMachineFunction; |
| class AMDGPUSubtarget; |
| class MachineRegisterInfo; |
| |
| class AMDGPUTargetLowering : public TargetLowering { |
| protected: |
| const AMDGPUSubtarget *Subtarget; |
| |
| SDValue LowerConstantInitializer(const Constant* Init, const GlobalValue *GV, |
| const SDValue &InitPtr, |
| SDValue Chain, |
| SelectionDAG &DAG) const; |
| SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; |
| /// \brief Lower vector stores by merging the vector elements into an integer |
| /// of the same bitwidth. |
| SDValue MergeVectorStore(const SDValue &Op, SelectionDAG &DAG) const; |
| /// \brief Split a vector store into multiple scalar stores. |
| /// \returns The resulting chain. |
| |
| SDValue LowerFREM(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFCEIL(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFTRUNC(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFRINT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFNEARBYINT(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerFROUND32(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFROUND64(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFROUND(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFFLOOR(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerCTLZ(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerINT_TO_FP32(SDValue Op, SelectionDAG &DAG, bool Signed) const; |
| SDValue LowerINT_TO_FP64(SDValue Op, SelectionDAG &DAG, bool Signed) const; |
| SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerFP64_TO_INT(SDValue Op, SelectionDAG &DAG, bool Signed) const; |
| SDValue LowerFP_TO_UINT(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const; |
| |
| protected: |
| bool shouldCombineMemoryType(EVT VT) const; |
| SDValue performLoadCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performStoreCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performAndCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performShlCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performSraCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performSrlCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performMulCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| SDValue performCtlzCombine(const SDLoc &SL, SDValue Cond, SDValue LHS, |
| SDValue RHS, DAGCombinerInfo &DCI) const; |
| SDValue performSelectCombine(SDNode *N, DAGCombinerInfo &DCI) const; |
| |
| static EVT getEquivalentMemType(LLVMContext &Context, EVT VT); |
| static EVT getEquivalentBitType(LLVMContext &Context, EVT VT); |
| |
| virtual SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op, |
| SelectionDAG &DAG) const; |
| |
| /// Return 64-bit value Op as two 32-bit integers. |
| std::pair<SDValue, SDValue> split64BitValue(SDValue Op, |
| SelectionDAG &DAG) const; |
| SDValue getLoHalf64(SDValue Op, SelectionDAG &DAG) const; |
| SDValue getHiHalf64(SDValue Op, SelectionDAG &DAG) const; |
| |
| /// \brief Split a vector load into 2 loads of half the vector. |
| SDValue SplitVectorLoad(SDValue Op, SelectionDAG &DAG) const; |
| |
| /// \brief Split a vector store into 2 stores of half the vector. |
| SDValue SplitVectorStore(SDValue Op, SelectionDAG &DAG) const; |
| |
| SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerSDIVREM(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerUDIVREM(SDValue Op, SelectionDAG &DAG) const; |
| SDValue LowerDIVREM24(SDValue Op, SelectionDAG &DAG, bool sign) const; |
| void LowerUDIVREM64(SDValue Op, SelectionDAG &DAG, |
| SmallVectorImpl<SDValue> &Results) const; |
| /// The SelectionDAGBuilder will automatically promote function arguments |
| /// with illegal types. However, this does not work for the AMDGPU targets |
| /// since the function arguments are stored in memory as these illegal types. |
| /// In order to handle this properly we need to get the origianl types sizes |
| /// from the LLVM IR Function and fixup the ISD:InputArg values before |
| /// passing them to AnalyzeFormalArguments() |
| void getOriginalFunctionArgs(SelectionDAG &DAG, |
| const Function *F, |
| const SmallVectorImpl<ISD::InputArg> &Ins, |
| SmallVectorImpl<ISD::InputArg> &OrigIns) const; |
| void AnalyzeFormalArguments(CCState &State, |
| const SmallVectorImpl<ISD::InputArg> &Ins) const; |
| void AnalyzeReturn(CCState &State, |
| const SmallVectorImpl<ISD::OutputArg> &Outs) const; |
| |
| public: |
| AMDGPUTargetLowering(const TargetMachine &TM, const AMDGPUSubtarget &STI); |
| |
| bool isFAbsFree(EVT VT) const override; |
| bool isFNegFree(EVT VT) const override; |
| bool isTruncateFree(EVT Src, EVT Dest) const override; |
| bool isTruncateFree(Type *Src, Type *Dest) const override; |
| |
| bool isZExtFree(Type *Src, Type *Dest) const override; |
| bool isZExtFree(EVT Src, EVT Dest) const override; |
| bool isZExtFree(SDValue Val, EVT VT2) const override; |
| |
| bool isNarrowingProfitable(EVT VT1, EVT VT2) const override; |
| |
| MVT getVectorIdxTy(const DataLayout &) const override; |
| bool isSelectSupported(SelectSupportKind) const override; |
| |
| bool isFPImmLegal(const APFloat &Imm, EVT VT) const override; |
| bool ShouldShrinkFPConstant(EVT VT) const override; |
| bool shouldReduceLoadWidth(SDNode *Load, |
| ISD::LoadExtType ExtType, |
| EVT ExtVT) const override; |
| |
| bool isLoadBitCastBeneficial(EVT, EVT) const final; |
| |
| bool storeOfVectorConstantIsCheap(EVT MemVT, |
| unsigned NumElem, |
| unsigned AS) const override; |
| bool aggressivelyPreferBuildVectorSources(EVT VecVT) const override; |
| bool isCheapToSpeculateCttz() const override; |
| bool isCheapToSpeculateCtlz() const override; |
| |
| SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, |
| const SmallVectorImpl<ISD::OutputArg> &Outs, |
| const SmallVectorImpl<SDValue> &OutVals, const SDLoc &DL, |
| SelectionDAG &DAG) const override; |
| SDValue LowerCall(CallLoweringInfo &CLI, |
| SmallVectorImpl<SDValue> &InVals) const override; |
| |
| SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, |
| SelectionDAG &DAG) const; |
| |
| SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; |
| SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; |
| void ReplaceNodeResults(SDNode * N, |
| SmallVectorImpl<SDValue> &Results, |
| SelectionDAG &DAG) const override; |
| |
| SDValue CombineFMinMaxLegacy(const SDLoc &DL, EVT VT, SDValue LHS, |
| SDValue RHS, SDValue True, SDValue False, |
| SDValue CC, DAGCombinerInfo &DCI) const; |
| |
| const char* getTargetNodeName(unsigned Opcode) const override; |
| |
| SDValue getRsqrtEstimate(SDValue Operand, |
| DAGCombinerInfo &DCI, |
| unsigned &RefinementSteps, |
| bool &UseOneConstNR) const override; |
| SDValue getRecipEstimate(SDValue Operand, |
| DAGCombinerInfo &DCI, |
| unsigned &RefinementSteps) const override; |
| |
| virtual SDNode *PostISelFolding(MachineSDNode *N, |
| SelectionDAG &DAG) const = 0; |
| |
| /// \brief Determine which of the bits specified in \p Mask are known to be |
| /// either zero or one and return them in the \p KnownZero and \p KnownOne |
| /// bitsets. |
| void computeKnownBitsForTargetNode(const SDValue Op, |
| APInt &KnownZero, |
| APInt &KnownOne, |
| const SelectionDAG &DAG, |
| unsigned Depth = 0) const override; |
| |
| unsigned ComputeNumSignBitsForTargetNode(SDValue Op, const SelectionDAG &DAG, |
| unsigned Depth = 0) const override; |
| |
| /// \brief Helper function that adds Reg to the LiveIn list of the DAG's |
| /// MachineFunction. |
| /// |
| /// \returns a RegisterSDNode representing Reg. |
| virtual SDValue CreateLiveInRegister(SelectionDAG &DAG, |
| const TargetRegisterClass *RC, |
| unsigned Reg, EVT VT) const; |
| |
| enum ImplicitParameter { |
| FIRST_IMPLICIT, |
| GRID_DIM = FIRST_IMPLICIT, |
| GRID_OFFSET, |
| }; |
| |
| /// \brief Helper function that returns the byte offset of the given |
| /// type of implicit parameter. |
| uint32_t getImplicitParameterOffset(const AMDGPUMachineFunction *MFI, |
| const ImplicitParameter Param) const; |
| }; |
| |
| namespace AMDGPUISD { |
| |
| enum NodeType : unsigned { |
| // AMDIL ISD Opcodes |
| FIRST_NUMBER = ISD::BUILTIN_OP_END, |
| CALL, // Function call based on a single integer |
| UMUL, // 32bit unsigned multiplication |
| BRANCH_COND, |
| // End AMDIL ISD Opcodes |
| ENDPGM, |
| RETURN, |
| DWORDADDR, |
| FRACT, |
| CLAMP, |
| |
| // SIN_HW, COS_HW - f32 for SI, 1 ULP max error, valid from -100 pi to 100 pi. |
| // Denormals handled on some parts. |
| COS_HW, |
| SIN_HW, |
| FMAX_LEGACY, |
| FMIN_LEGACY, |
| FMAX3, |
| SMAX3, |
| UMAX3, |
| FMIN3, |
| SMIN3, |
| UMIN3, |
| FMED3, |
| SMED3, |
| UMED3, |
| URECIP, |
| DIV_SCALE, |
| DIV_FMAS, |
| DIV_FIXUP, |
| TRIG_PREOP, // 1 ULP max error for f64 |
| |
| // RCP, RSQ - For f32, 1 ULP max error, no denormal handling. |
| // For f64, max error 2^29 ULP, handles denormals. |
| RCP, |
| RSQ, |
| RSQ_LEGACY, |
| RSQ_CLAMP, |
| LDEXP, |
| FP_CLASS, |
| DOT4, |
| CARRY, |
| BORROW, |
| BFE_U32, // Extract range of bits with zero extension to 32-bits. |
| BFE_I32, // Extract range of bits with sign extension to 32-bits. |
| BFI, // (src0 & src1) | (~src0 & src2) |
| BFM, // Insert a range of bits into a 32-bit word. |
| FFBH_U32, // ctlz with -1 if input is zero. |
| MUL_U24, |
| MUL_I24, |
| MAD_U24, |
| MAD_I24, |
| TEXTURE_FETCH, |
| EXPORT, |
| CONST_ADDRESS, |
| REGISTER_LOAD, |
| REGISTER_STORE, |
| LOAD_INPUT, |
| SAMPLE, |
| SAMPLEB, |
| SAMPLED, |
| SAMPLEL, |
| |
| // These cvt_f32_ubyte* nodes need to remain consecutive and in order. |
| CVT_F32_UBYTE0, |
| CVT_F32_UBYTE1, |
| CVT_F32_UBYTE2, |
| CVT_F32_UBYTE3, |
| /// This node is for VLIW targets and it is used to represent a vector |
| /// that is stored in consecutive registers with the same channel. |
| /// For example: |
| /// |X |Y|Z|W| |
| /// T0|v.x| | | | |
| /// T1|v.y| | | | |
| /// T2|v.z| | | | |
| /// T3|v.w| | | | |
| BUILD_VERTICAL_VECTOR, |
| /// Pointer to the start of the shader's constant data. |
| CONST_DATA_PTR, |
| SENDMSG, |
| INTERP_MOV, |
| INTERP_P1, |
| INTERP_P2, |
| PC_ADD_REL_OFFSET, |
| FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE, |
| STORE_MSKOR, |
| LOAD_CONSTANT, |
| TBUFFER_STORE_FORMAT, |
| ATOMIC_CMP_SWAP, |
| ATOMIC_INC, |
| ATOMIC_DEC, |
| LAST_AMDGPU_ISD_NUMBER |
| }; |
| |
| |
| } // End namespace AMDGPUISD |
| |
| } // End namespace llvm |
| |
| #endif |
