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 LowerFrameIndex(SDValue Op, SelectionDAG &DAG) const;
32 SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
33 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const;
34 SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
35 /// \brief Lower vector stores by merging the vector elements into an integer
36 /// of the same bitwidth.
37 SDValue MergeVectorStore(const SDValue &Op, SelectionDAG &DAG) const;
38 /// \brief Split a vector store into multiple scalar stores.
39 /// \returns The resulting chain.
40 SDValue LowerUDIVREM(SDValue Op, SelectionDAG &DAG) const;
41 SDValue LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) const;
45 /// \brief Helper function that adds Reg to the LiveIn list of the DAG's
48 /// \returns a RegisterSDNode representing Reg.
49 virtual SDValue CreateLiveInRegister(SelectionDAG &DAG,
50 const TargetRegisterClass *RC,
51 unsigned Reg, EVT VT) const;
52 SDValue LowerGlobalAddress(AMDGPUMachineFunction *MFI, SDValue Op,
53 SelectionDAG &DAG) const;
54 /// \brief Split a vector load into multiple scalar loads.
55 SDValue SplitVectorLoad(const SDValue &Op, SelectionDAG &DAG) const;
56 SDValue SplitVectorStore(SDValue Op, SelectionDAG &DAG) const;
57 SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const;
58 bool isHWTrueValue(SDValue Op) const;
59 bool isHWFalseValue(SDValue Op) const;
61 /// The SelectionDAGBuilder will automatically promote function arguments
62 /// with illegal types. However, this does not work for the AMDGPU targets
63 /// since the function arguments are stored in memory as these illegal types.
64 /// In order to handle this properly we need to get the origianl types sizes
65 /// from the LLVM IR Function and fixup the ISD:InputArg values before
66 /// passing them to AnalyzeFormalArguments()
67 void getOriginalFunctionArgs(SelectionDAG &DAG,
69 const SmallVectorImpl<ISD::InputArg> &Ins,
70 SmallVectorImpl<ISD::InputArg> &OrigIns) const;
71 void AnalyzeFormalArguments(CCState &State,
72 const SmallVectorImpl<ISD::InputArg> &Ins) const;
75 AMDGPUTargetLowering(TargetMachine &TM);
77 virtual bool isFAbsFree(EVT VT) const;
78 virtual bool isFNegFree(EVT VT) const;
79 virtual MVT getVectorIdxTy() const;
80 virtual bool isLoadBitCastBeneficial(EVT, EVT) const LLVM_OVERRIDE;
81 virtual SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv,
83 const SmallVectorImpl<ISD::OutputArg> &Outs,
84 const SmallVectorImpl<SDValue> &OutVals,
85 SDLoc DL, SelectionDAG &DAG) const;
86 virtual SDValue LowerCall(CallLoweringInfo &CLI,
87 SmallVectorImpl<SDValue> &InVals) const {
89 llvm_unreachable("Undefined function");
92 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;
93 SDValue LowerIntrinsicIABS(SDValue Op, SelectionDAG &DAG) const;
94 SDValue LowerIntrinsicLRP(SDValue Op, SelectionDAG &DAG) const;
95 SDValue LowerMinMax(SDValue Op, SelectionDAG &DAG) const;
96 virtual const char* getTargetNodeName(unsigned Opcode) const;
98 virtual SDNode *PostISelFolding(MachineSDNode *N, SelectionDAG &DAG) const {
102 // Functions defined in AMDILISelLowering.cpp
105 /// \brief Determine which of the bits specified in \p Mask are known to be
106 /// either zero or one and return them in the \p KnownZero and \p KnownOne
108 virtual void computeMaskedBitsForTargetNode(const SDValue Op,
111 const SelectionDAG &DAG,
112 unsigned Depth = 0) const;
114 virtual bool getTgtMemIntrinsic(IntrinsicInfo &Info,
115 const CallInst &I, unsigned Intrinsic) const;
117 /// We want to mark f32/f64 floating point values as legal.
118 bool isFPImmLegal(const APFloat &Imm, EVT VT) const;
120 /// We don't want to shrink f64/f32 constants.
121 bool ShouldShrinkFPConstant(EVT VT) const;
124 void InitAMDILLowering();
125 SDValue LowerSREM(SDValue Op, SelectionDAG &DAG) const;
126 SDValue LowerSREM8(SDValue Op, SelectionDAG &DAG) const;
127 SDValue LowerSREM16(SDValue Op, SelectionDAG &DAG) const;
128 SDValue LowerSREM32(SDValue Op, SelectionDAG &DAG) const;
129 SDValue LowerSREM64(SDValue Op, SelectionDAG &DAG) const;
130 SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) const;
131 SDValue LowerSDIV24(SDValue Op, SelectionDAG &DAG) const;
132 SDValue LowerSDIV32(SDValue Op, SelectionDAG &DAG) const;
133 SDValue LowerSDIV64(SDValue Op, SelectionDAG &DAG) const;
134 SDValue LowerSIGN_EXTEND_INREG(SDValue Op, SelectionDAG &DAG) const;
135 EVT genIntType(uint32_t size = 32, uint32_t numEle = 1) const;
136 SDValue LowerBRCOND(SDValue Op, SelectionDAG &DAG) const;
137 SDValue LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const;
140 namespace AMDGPUISD {
144 FIRST_NUMBER = ISD::BUILTIN_OP_END,
145 CALL, // Function call based on a single integer
146 UMUL, // 32bit unsigned multiplication
147 DIV_INF, // Divide with infinity returned on zero divisor
150 // End AMDIL ISD Opcodes
173 FIRST_MEM_OPCODE_NUMBER = ISD::FIRST_TARGET_MEMORY_OPCODE,
176 TBUFFER_STORE_FORMAT,
177 LAST_AMDGPU_ISD_NUMBER
181 } // End namespace AMDGPUISD
183 } // End namespace llvm
185 #endif // AMDGPUISELLOWERING_H