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 AMDGPUSubtarget;
25 class MachineRegisterInfo;
27 class AMDGPUTargetLowering : public TargetLowering {
29 const AMDGPUSubtarget *Subtarget;
32 void ExtractVectorElements(SDValue Op, SelectionDAG &DAG,
33 SmallVectorImpl<SDValue> &Args,
34 unsigned Start, unsigned Count) const;
35 SDValue LowerConstantInitializer(const Constant* Init, const GlobalValue *GV,
36 const SDValue &InitPtr,
38 SelectionDAG &DAG) const;
39 SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;
40 SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
41 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
42 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
43 /// \brief Lower vector stores by merging the vector elements into an integer
44 /// of the same bitwidth.
45 SDValue MergeVectorStore(const SDValue &Op, SelectionDAG &DAG) const;
46 /// \brief Split a vector store into multiple scalar stores.
47 /// \returns The resulting chain.
48 SDValue LowerUDIVREM(SDValue Op, SelectionDAG &DAG) const;
49 SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
53 /// \brief Helper function that adds Reg to the LiveIn list of the DAG's
56 /// \returns a RegisterSDNode representing Reg.
57 virtual SDValue CreateLiveInRegister(SelectionDAG &DAG,
58 const TargetRegisterClass *RC,
59 unsigned Reg, EVT VT) const;
60 SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
61 SelectionDAG &DAG) const;
62 /// \brief Split a vector load into multiple scalar loads.
63 SDValue SplitVectorLoad(const SDValue &Op, SelectionDAG &DAG) const;
64 SDValue SplitVectorStore(SDValue Op, SelectionDAG &DAG) const;
65 SDValue LowerLOAD(SDValue Op, SelectionDAG &DAG) const;
66 SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
67 bool isHWTrueValue(SDValue Op) const;
68 bool isHWFalseValue(SDValue Op) const;
70 /// The SelectionDAGBuilder will automatically promote function arguments
71 /// with illegal types. However, this does not work for the AMDGPU targets
72 /// since the function arguments are stored in memory as these illegal types.
73 /// In order to handle this properly we need to get the origianl types sizes
74 /// from the LLVM IR Function and fixup the ISD:InputArg values before
75 /// passing them to AnalyzeFormalArguments()
76 void getOriginalFunctionArgs(SelectionDAG &DAG,
78 const SmallVectorImpl<ISD::InputArg> &Ins,
79 SmallVectorImpl<ISD::InputArg> &OrigIns) const;
80 void AnalyzeFormalArguments(CCState &State,
81 const SmallVectorImpl<ISD::InputArg> &Ins) const;
84 AMDGPUTargetLowering(TargetMachine &TM);
86 virtual bool isFAbsFree(EVT VT) const override;
87 virtual bool isFNegFree(EVT VT) const override;
88 virtual bool isTruncateFree(EVT Src, EVT Dest) const override;
89 virtual bool isTruncateFree(Type *Src, Type *Dest) const override;
91 virtual bool isZExtFree(Type *Src, Type *Dest) const override;
92 virtual bool isZExtFree(EVT Src, EVT Dest) const override;
94 virtual bool isNarrowingProfitable(EVT VT1, EVT VT2) const override;
96 virtual MVT getVectorIdxTy() const override;
97 virtual bool isLoadBitCastBeneficial(EVT, EVT) const override;
98 virtual SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv,
100 const SmallVectorImpl<ISD::OutputArg> &Outs,
101 const SmallVectorImpl<SDValue> &OutVals,
102 SDLoc DL, SelectionDAG &DAG) const;
103 virtual SDValue LowerCall(CallLoweringInfo &CLI,
104 SmallVectorImpl<SDValue> &InVals) const {
106 llvm_unreachable("Undefined function");
109 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
110 virtual void ReplaceNodeResults(SDNode * N,
111 SmallVectorImpl<SDValue> &Results,
112 SelectionDAG &DAG) const override;
114 SDValue LowerIntrinsicIABS(SDValue Op, SelectionDAG &DAG) const;
115 SDValue LowerIntrinsicLRP(SDValue Op, SelectionDAG &DAG) const;
116 SDValue LowerMinMax(SDValue Op, SelectionDAG &DAG) const;
117 virtual const char* getTargetNodeName(unsigned Opcode) const;
119 virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const {
123 /// \brief Determine which of the bits specified in \p Mask are known to be
124 /// either zero or one and return them in the \p KnownZero and \p KnownOne
126 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
129 const SelectionDAG &DAG,
130 unsigned Depth = 0) const override;
132 // Functions defined in AMDILISelLowering.cpp
134 virtual bool getTgtMemIntrinsic(IntrinsicInfo &Info,
135 const CallInst &I, unsigned Intrinsic) const;
137 /// We want to mark f32/f64 floating point values as legal.
138 bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
140 /// We don't want to shrink f64/f32 constants.
141 bool ShouldShrinkFPConstant(EVT VT) const;
144 void InitAMDILLowering();
145 SDValue LowerSREM(SDValue Op, SelectionDAG &DAG) const;
146 SDValue LowerSREM8(SDValue Op, SelectionDAG &DAG) const;
147 SDValue LowerSREM16(SDValue Op, SelectionDAG &DAG) const;
148 SDValue LowerSREM32(SDValue Op, SelectionDAG &DAG) const;
149 SDValue LowerSREM64(SDValue Op, SelectionDAG &DAG) const;
150 SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) const;
151 SDValue LowerSDIV24(SDValue Op, SelectionDAG &DAG) const;
152 SDValue LowerSDIV32(SDValue Op, SelectionDAG &DAG) const;
153 SDValue LowerSDIV64(SDValue Op, SelectionDAG &DAG) const;
155 SDValue ExpandSIGN_EXTEND_INREG(SDValue Op,
157 SelectionDAG &DAG) const;
158 SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const;
159 EVT genIntType(uint32_t size = 32, uint32_t numEle = 1) const;
160 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
161 SDValue LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
164 namespace AMDGPUISD {
168 FIRST_NUMBER = ISD::BUILTIN_OP_END,
169 CALL, // Function call based on a single integer
170 UMUL, // 32bit unsigned multiplication
171 DIV_INF, // Divide with infinity returned on zero divisor
174 // End AMDIL ISD Opcodes
187 BFE_U32, // Extract range of bits with zero extension to 32-bits.
188 BFE_I32, // Extract range of bits with sign extension to 32-bits.
189 BFI, // (src0 & src1) | (~src0 & src2)
190 BFM, // Insert a range of bits into a 32-bit word.
201 FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE,
204 TBUFFER_STORE_FORMAT,
205 LAST_AMDGPU_ISD_NUMBER
209 } // End namespace AMDGPUISD
211 } // End namespace llvm
213 #endif // AMDGPUISELLOWERING_H