1 //===-- llvm/Target/TargetCallingConv.h - Calling Convention ----*- 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 types for working with calling-convention information. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_TARGET_TARGETCALLINGCONV_H 15 #define LLVM_TARGET_TARGETCALLINGCONV_H 16 17 #include "llvm/CodeGen/ValueTypes.h" 18 #include "llvm/Support/DataTypes.h" 19 #include "llvm/Support/MathExtras.h" 20 #include <climits> 21 22 namespace llvm { 23 24 namespace ISD { 25 struct ArgFlagsTy { 26 private: 27 static const uint64_t NoFlagSet = 0ULL; 28 static const uint64_t ZExt = 1ULL<<0; ///< Zero extended 29 static const uint64_t ZExtOffs = 0; 30 static const uint64_t SExt = 1ULL<<1; ///< Sign extended 31 static const uint64_t SExtOffs = 1; 32 static const uint64_t InReg = 1ULL<<2; ///< Passed in register 33 static const uint64_t InRegOffs = 2; 34 static const uint64_t SRet = 1ULL<<3; ///< Hidden struct-ret ptr 35 static const uint64_t SRetOffs = 3; 36 static const uint64_t ByVal = 1ULL<<4; ///< Struct passed by value 37 static const uint64_t ByValOffs = 4; 38 static const uint64_t Nest = 1ULL<<5; ///< Nested fn static chain 39 static const uint64_t NestOffs = 5; 40 static const uint64_t Returned = 1ULL<<6; ///< Always returned 41 static const uint64_t ReturnedOffs = 6; 42 static const uint64_t ByValAlign = 0xFULL<<7; ///< Struct alignment 43 static const uint64_t ByValAlignOffs = 7; 44 static const uint64_t Split = 1ULL<<11; 45 static const uint64_t SplitOffs = 11; 46 static const uint64_t InAlloca = 1ULL<<12; ///< Passed with inalloca 47 static const uint64_t InAllocaOffs = 12; 48 static const uint64_t SplitEnd = 1ULL<<13; ///< Last part of a split 49 static const uint64_t SplitEndOffs = 13; 50 static const uint64_t SwiftSelf = 1ULL<<14; ///< Swift self parameter 51 static const uint64_t SwiftSelfOffs = 14; 52 static const uint64_t SwiftError = 1ULL<<15; ///< Swift error parameter 53 static const uint64_t SwiftErrorOffs = 15; 54 static const uint64_t OrigAlign = 0x1FULL<<27; 55 static const uint64_t OrigAlignOffs = 27; 56 static const uint64_t ByValSize = 0x3fffffffULL<<32; ///< Struct size 57 static const uint64_t ByValSizeOffs = 32; 58 static const uint64_t InConsecutiveRegsLast = 0x1ULL<<62; ///< Struct size 59 static const uint64_t InConsecutiveRegsLastOffs = 62; 60 static const uint64_t InConsecutiveRegs = 0x1ULL<<63; ///< Struct size 61 static const uint64_t InConsecutiveRegsOffs = 63; 62 63 static const uint64_t One = 1ULL; ///< 1 of this type, for shifts 64 65 uint64_t Flags; 66 67 public: 68 ArgFlagsTy() : Flags(0) { } 69 70 bool isZExt() const { return Flags & ZExt; } 71 void setZExt() { Flags |= One << ZExtOffs; } 72 73 bool isSExt() const { return Flags & SExt; } 74 void setSExt() { Flags |= One << SExtOffs; } 75 76 bool isInReg() const { return Flags & InReg; } 77 void setInReg() { Flags |= One << InRegOffs; } 78 79 bool isSRet() const { return Flags & SRet; } 80 void setSRet() { Flags |= One << SRetOffs; } 81 82 bool isByVal() const { return Flags & ByVal; } 83 void setByVal() { Flags |= One << ByValOffs; } 84 85 bool isInAlloca() const { return Flags & InAlloca; } 86 void setInAlloca() { Flags |= One << InAllocaOffs; } 87 88 bool isSwiftSelf() const { return Flags & SwiftSelf; } 89 void setSwiftSelf() { Flags |= One << SwiftSelfOffs; } 90 91 bool isSwiftError() const { return Flags & SwiftError; } 92 void setSwiftError() { Flags |= One << SwiftErrorOffs; } 93 94 bool isNest() const { return Flags & Nest; } 95 void setNest() { Flags |= One << NestOffs; } 96 97 bool isReturned() const { return Flags & Returned; } 98 void setReturned() { Flags |= One << ReturnedOffs; } 99 100 bool isInConsecutiveRegs() const { return Flags & InConsecutiveRegs; } 101 void setInConsecutiveRegs() { Flags |= One << InConsecutiveRegsOffs; } 102 103 bool isInConsecutiveRegsLast() const { return Flags & InConsecutiveRegsLast; } 104 void setInConsecutiveRegsLast() { Flags |= One << InConsecutiveRegsLastOffs; } 105 106 unsigned getByValAlign() const { 107 return (unsigned) 108 ((One << ((Flags & ByValAlign) >> ByValAlignOffs)) / 2); 109 } 110 void setByValAlign(unsigned A) { 111 Flags = (Flags & ~ByValAlign) | 112 (uint64_t(Log2_32(A) + 1) << ByValAlignOffs); 113 } 114 115 bool isSplit() const { return Flags & Split; } 116 void setSplit() { Flags |= One << SplitOffs; } 117 118 bool isSplitEnd() const { return Flags & SplitEnd; } 119 void setSplitEnd() { Flags |= One << SplitEndOffs; } 120 121 unsigned getOrigAlign() const { 122 return (unsigned) 123 ((One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2); 124 } 125 void setOrigAlign(unsigned A) { 126 Flags = (Flags & ~OrigAlign) | 127 (uint64_t(Log2_32(A) + 1) << OrigAlignOffs); 128 } 129 130 unsigned getByValSize() const { 131 return (unsigned)((Flags & ByValSize) >> ByValSizeOffs); 132 } 133 void setByValSize(unsigned S) { 134 Flags = (Flags & ~ByValSize) | (uint64_t(S) << ByValSizeOffs); 135 } 136 137 /// getRawBits - Represent the flags as a bunch of bits. 138 uint64_t getRawBits() const { return Flags; } 139 }; 140 141 /// InputArg - This struct carries flags and type information about a 142 /// single incoming (formal) argument or incoming (from the perspective 143 /// of the caller) return value virtual register. 144 /// 145 struct InputArg { 146 ArgFlagsTy Flags; 147 MVT VT; 148 EVT ArgVT; 149 bool Used; 150 151 /// Index original Function's argument. 152 unsigned OrigArgIndex; 153 /// Sentinel value for implicit machine-level input arguments. 154 static const unsigned NoArgIndex = UINT_MAX; 155 156 /// Offset in bytes of current input value relative to the beginning of 157 /// original argument. E.g. if argument was splitted into four 32 bit 158 /// registers, we got 4 InputArgs with PartOffsets 0, 4, 8 and 12. 159 unsigned PartOffset; 160 161 InputArg() : VT(MVT::Other), Used(false) {} 162 InputArg(ArgFlagsTy flags, EVT vt, EVT argvt, bool used, 163 unsigned origIdx, unsigned partOffs) 164 : Flags(flags), Used(used), OrigArgIndex(origIdx), PartOffset(partOffs) { 165 VT = vt.getSimpleVT(); 166 ArgVT = argvt; 167 } 168 169 bool isOrigArg() const { 170 return OrigArgIndex != NoArgIndex; 171 } 172 173 unsigned getOrigArgIndex() const { 174 assert(OrigArgIndex != NoArgIndex && "Implicit machine-level argument"); 175 return OrigArgIndex; 176 } 177 }; 178 179 /// OutputArg - This struct carries flags and a value for a 180 /// single outgoing (actual) argument or outgoing (from the perspective 181 /// of the caller) return value virtual register. 182 /// 183 struct OutputArg { 184 ArgFlagsTy Flags; 185 MVT VT; 186 EVT ArgVT; 187 188 /// IsFixed - Is this a "fixed" value, ie not passed through a vararg "...". 189 bool IsFixed; 190 191 /// Index original Function's argument. 192 unsigned OrigArgIndex; 193 194 /// Offset in bytes of current output value relative to the beginning of 195 /// original argument. E.g. if argument was splitted into four 32 bit 196 /// registers, we got 4 OutputArgs with PartOffsets 0, 4, 8 and 12. 197 unsigned PartOffset; 198 199 OutputArg() : IsFixed(false) {} 200 OutputArg(ArgFlagsTy flags, EVT vt, EVT argvt, bool isfixed, 201 unsigned origIdx, unsigned partOffs) 202 : Flags(flags), IsFixed(isfixed), OrigArgIndex(origIdx), 203 PartOffset(partOffs) { 204 VT = vt.getSimpleVT(); 205 ArgVT = argvt; 206 } 207 }; 208 } // end namespace ISD 209 210 } // end llvm namespace 211 212 #endif // LLVM_TARGET_TARGETCALLINGCONV_H 213
