1 //===-- NVPTXISelLowering.h - NVPTX DAG Lowering Interface ------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the interfaces that NVPTX uses to lower LLVM code into a 11 // selection DAG. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef NVPTXISELLOWERING_H 16 #define NVPTXISELLOWERING_H 17 18 #include "NVPTX.h" 19 #include "NVPTXSubtarget.h" 20 #include "llvm/CodeGen/SelectionDAG.h" 21 #include "llvm/Target/TargetLowering.h" 22 23 namespace llvm { 24 namespace NVPTXISD { 25 enum NodeType { 26 // Start the numbering from where ISD NodeType finishes. 27 FIRST_NUMBER = ISD::BUILTIN_OP_END, 28 Wrapper, 29 CALL, 30 RET_FLAG, 31 LOAD_PARAM, 32 NVBuiltin, 33 DeclareParam, 34 DeclareScalarParam, 35 DeclareRetParam, 36 DeclareRet, 37 DeclareScalarRet, 38 LoadParam, 39 StoreParam, 40 StoreParamS32, // to sext and store a <32bit value, not used currently 41 StoreParamU32, // to zext and store a <32bit value, not used currently 42 MoveToParam, 43 PrintCall, 44 PrintCallUni, 45 CallArgBegin, 46 CallArg, 47 LastCallArg, 48 CallArgEnd, 49 CallVoid, 50 CallVal, 51 CallSymbol, 52 Prototype, 53 MoveParam, 54 MoveRetval, 55 MoveToRetval, 56 StoreRetval, 57 PseudoUseParam, 58 RETURN, 59 CallSeqBegin, 60 CallSeqEnd, 61 Dummy 62 }; 63 } 64 65 //===--------------------------------------------------------------------===// 66 // TargetLowering Implementation 67 //===--------------------------------------------------------------------===// 68 class NVPTXTargetLowering : public TargetLowering { 69 public: 70 explicit NVPTXTargetLowering(NVPTXTargetMachine &TM); 71 virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const; 72 73 SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const; 74 SDValue LowerGlobalAddress(const GlobalValue *GV, int64_t Offset, 75 SelectionDAG &DAG) const; 76 77 virtual const char *getTargetNodeName(unsigned Opcode) const; 78 79 bool isTypeSupportedInIntrinsic(MVT VT) const; 80 81 bool getTgtMemIntrinsic(IntrinsicInfo& Info, const CallInst &I, 82 unsigned Intrinsic) const; 83 84 /// isLegalAddressingMode - Return true if the addressing mode represented 85 /// by AM is legal for this target, for a load/store of the specified type 86 /// Used to guide target specific optimizations, like loop strength 87 /// reduction (LoopStrengthReduce.cpp) and memory optimization for 88 /// address mode (CodeGenPrepare.cpp) 89 virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const; 90 91 /// getFunctionAlignment - Return the Log2 alignment of this function. 92 virtual unsigned getFunctionAlignment(const Function *F) const; 93 94 virtual EVT getSetCCResultType(EVT VT) const { 95 return MVT::i1; 96 } 97 98 ConstraintType getConstraintType(const std::string &Constraint) const; 99 std::pair<unsigned, const TargetRegisterClass*> 100 getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const; 101 102 virtual SDValue 103 LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 104 const SmallVectorImpl<ISD::InputArg> &Ins, DebugLoc dl, 105 SelectionDAG &DAG, 106 SmallVectorImpl<SDValue> &InVals) const; 107 108 virtual SDValue 109 LowerCall(CallLoweringInfo &CLI, SmallVectorImpl<SDValue> &InVals) const; 110 111 std::string getPrototype(Type *, const ArgListTy &, 112 const SmallVectorImpl<ISD::OutputArg> &, 113 unsigned retAlignment) const; 114 115 virtual SDValue 116 LowerReturn(SDValue Chain, CallingConv::ID CallConv, bool isVarArg, 117 const SmallVectorImpl<ISD::OutputArg> &Outs, 118 const SmallVectorImpl<SDValue> &OutVals, DebugLoc dl, 119 SelectionDAG &DAG) const; 120 121 virtual void LowerAsmOperandForConstraint(SDValue Op, std::string &Constraint, 122 std::vector<SDValue> &Ops, 123 SelectionDAG &DAG) const; 124 125 NVPTXTargetMachine *nvTM; 126 127 // PTX always uses 32-bit shift amounts 128 virtual MVT getShiftAmountTy(EVT LHSTy) const { 129 return MVT::i32; 130 } 131 132 private: 133 const NVPTXSubtarget &nvptxSubtarget; // cache the subtarget here 134 135 SDValue getExtSymb(SelectionDAG &DAG, const char *name, int idx, EVT = 136 MVT::i32) const; 137 SDValue getParamSymbol(SelectionDAG &DAG, int idx, EVT = MVT::i32) const; 138 SDValue getParamHelpSymbol(SelectionDAG &DAG, int idx); 139 140 SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const; 141 }; 142 } // namespace llvm 143 144 #endif // NVPTXISELLOWERING_H 145