1 //===-- AMDGPUISelLowering.h - AMDGPU Lowering Interface --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Interface definition of the TargetLowering class that is common
14 //===----------------------------------------------------------------------===//
16 #ifndef AMDGPUISELLOWERING_H
17 #define AMDGPUISELLOWERING_H
19 #include "llvm/Target/TargetLowering.h"
23 class AMDGPUMachineFunction;
24 class MachineRegisterInfo;
26 class AMDGPUTargetLowering : public TargetLowering {
28 void ExtractVectorElements(SDValue Op, SelectionDAG &DAG,
29 SmallVectorImpl<SDValue> &Args,
30 unsigned Start, unsigned Count) const;
31 SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
32 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
33 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
34 SDValue LowerUDIVREM(SDValue Op, SelectionDAG &DAG) const;
38 /// \brief Helper function that adds Reg to the LiveIn list of the DAG's
41 /// \returns a RegisterSDNode representing Reg.
42 virtual SDValue CreateLiveInRegister(SelectionDAG &DAG,
43 const TargetRegisterClass *RC,
44 unsigned Reg, EVT VT) const;
45 SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
46 SelectionDAG &DAG) const;
48 bool isHWTrueValue(SDValue Op) const;
49 bool isHWFalseValue(SDValue Op) const;
51 void AnalyzeFormalArguments(CCState &State,
52 const SmallVectorImpl<ISD::InputArg> &Ins) const;
54 /// \brief Lower vector stores by merging the vector elements into an integer
55 /// of the same bitwidth.
56 SDValue LowerVectorStore(const SDValue &Op, SelectionDAG &DAG) const;
59 AMDGPUTargetLowering(TargetMachine &TM);
61 virtual bool isFAbsFree(EVT VT) const;
62 virtual bool isFNegFree(EVT VT) const;
63 virtual MVT getVectorIdxTy() const;
64 virtual SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv,
66 const SmallVectorImpl<ISD::OutputArg> &Outs,
67 const SmallVectorImpl<SDValue> &OutVals,
68 SDLoc DL, SelectionDAG &DAG) const;
69 virtual SDValue LowerCall(CallLoweringInfo &CLI,
70 SmallVectorImpl<SDValue> &InVals) const {
72 llvm_unreachable("Undefined function");
75 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
76 SDValue LowerIntrinsicIABS(SDValue Op, SelectionDAG &DAG) const;
77 SDValue LowerIntrinsicLRP(SDValue Op, SelectionDAG &DAG) const;
78 SDValue LowerMinMax(SDValue Op, SelectionDAG &DAG) const;
79 virtual const char* getTargetNodeName(unsigned Opcode) const;
81 virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const {
85 // Functions defined in AMDILISelLowering.cpp
88 /// \brief Determine which of the bits specified in \p Mask are known to be
89 /// either zero or one and return them in the \p KnownZero and \p KnownOne
91 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
94 const SelectionDAG &DAG,
95 unsigned Depth = 0) const;
97 virtual bool getTgtMemIntrinsic(IntrinsicInfo &Info,
98 const CallInst &I, unsigned Intrinsic) const;
100 /// We want to mark f32/f64 floating point values as legal.
101 bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
103 /// We don't want to shrink f64/f32 constants.
104 bool ShouldShrinkFPConstant(EVT VT) const;
107 void InitAMDILLowering();
108 SDValue LowerSREM(SDValue Op, SelectionDAG &DAG) const;
109 SDValue LowerSREM8(SDValue Op, SelectionDAG &DAG) const;
110 SDValue LowerSREM16(SDValue Op, SelectionDAG &DAG) const;
111 SDValue LowerSREM32(SDValue Op, SelectionDAG &DAG) const;
112 SDValue LowerSREM64(SDValue Op, SelectionDAG &DAG) const;
113 SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) const;
114 SDValue LowerSDIV24(SDValue Op, SelectionDAG &DAG) const;
115 SDValue LowerSDIV32(SDValue Op, SelectionDAG &DAG) const;
116 SDValue LowerSDIV64(SDValue Op, SelectionDAG &DAG) const;
117 SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const;
118 EVT genIntType(uint32_t size = 32, uint32_t numEle = 1) const;
119 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
120 SDValue LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
123 namespace AMDGPUISD {
127 FIRST_NUMBER = ISD::BUILTIN_OP_END,
128 CALL, // Function call based on a single integer
129 UMUL, // 32bit unsigned multiplication
130 DIV_INF, // Divide with infinity returned on zero divisor
133 // End AMDIL ISD Opcodes
156 FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE,
159 LAST_AMDGPU_ISD_NUMBER
163 } // End namespace AMDGPUISD
165 } // End namespace llvm
167 #endif // AMDGPUISELLOWERING_H