//===-- 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 AMDGPUISELLOWERING_H #define AMDGPUISELLOWERING_H #include "llvm/Target/TargetLowering.h" namespace llvm { class AMDGPUMachineFunction; class AMDGPUSubtarget; class MachineRegisterInfo; class AMDGPUTargetLowering : public TargetLowering { protected: const AMDGPUSubtarget *Subtarget; private: SDValue LowerConstantInitializer(const Constant* Init, const GlobalValue *GV, const SDValue &InitPtr, SDValue Chain, SelectionDAG &DAG) const; SDValue LowerFrameIndex(SDValue Op, 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 LowerSDIV(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSDIV24(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSDIV32(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSDIV64(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSREM(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSREM32(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSREM64(SDValue Op, SelectionDAG &DAG) const; SDValue LowerUDIVREM(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 LowerFFLOOR(SDValue Op, SelectionDAG &DAG) const; SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const; SDValue ExpandSIGN_EXTEND_INREG(SDValue Op, unsigned BitsDiff, SelectionDAG &DAG) const; SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const; protected: static EVT getEquivalentMemType(LLVMContext &Context, EVT VT); static EVT getEquivalentLoadRegType(LLVMContext &Context, EVT VT); /// \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; SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op, SelectionDAG &DAG) const; /// \brief Split a vector load into multiple scalar loads. SDValue SplitVectorLoad(const SDValue &Op, SelectionDAG &DAG) const; SDValue SplitVectorStore(SDValue Op, SelectionDAG &DAG) const; SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const; SDValue LowerSDIVREM(SDValue Op, SelectionDAG &DAG) const; bool isHWTrueValue(SDValue Op) const; bool isHWFalseValue(SDValue Op) 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 &Ins, SmallVectorImpl &OrigIns) const; void AnalyzeFormalArguments(CCState &State, const SmallVectorImpl &Ins) const; public: AMDGPUTargetLowering(TargetMachine &TM); 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 override; bool isSelectSupported(SelectSupportKind) const override; bool isFPImmLegal(const APFloat &Imm, EVT VT) const override; bool ShouldShrinkFPConstant(EVT VT) const override; bool isLoadBitCastBeneficial(EVT, EVT) const override; SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, const SmallVectorImpl &Outs, const SmallVectorImpl &OutVals, SDLoc DL, SelectionDAG &DAG) const override; SDValue LowerCall(CallLoweringInfo &CLI, SmallVectorImpl &InVals) const override; SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override; SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override; void ReplaceNodeResults(SDNode * N, SmallVectorImpl &Results, SelectionDAG &DAG) const override; SDValue LowerIntrinsicIABS(SDValue Op, SelectionDAG &DAG) const; SDValue LowerIntrinsicLRP(SDValue Op, SelectionDAG &DAG) const; SDValue CombineMinMax(SDNode *N, SelectionDAG &DAG) const; const char* getTargetNodeName(unsigned Opcode) const override; virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const { return N; } /// \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; virtual unsigned ComputeNumSignBitsForTargetNode( SDValue Op, const SelectionDAG &DAG, unsigned Depth = 0) const override; }; namespace AMDGPUISD { enum { // AMDIL ISD Opcodes FIRST_NUMBER = ISD::BUILTIN_OP_END, CALL, // Function call based on a single integer UMUL, // 32bit unsigned multiplication RET_FLAG, BRANCH_COND, // End AMDIL ISD Opcodes 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, SMAX, UMAX, FMIN, SMIN, UMIN, 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_CLAMPED, DOT4, 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. BREV, // Reverse bits. 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, FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE, STORE_MSKOR, LOAD_CONSTANT, TBUFFER_STORE_FORMAT, LAST_AMDGPU_ISD_NUMBER }; } // End namespace AMDGPUISD } // End namespace llvm #endif // AMDGPUISELLOWERING_H