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/Support/DataTypes.h" 18 #include "llvm/Support/MathExtras.h" 19 #include <string> 20 21 namespace llvm { 22 23 namespace ISD { 24 struct ArgFlagsTy { 25 private: 26 static const uint64_t NoFlagSet = 0ULL; 27 static const uint64_t ZExt = 1ULL<<0; ///< Zero extended 28 static const uint64_t ZExtOffs = 0; 29 static const uint64_t SExt = 1ULL<<1; ///< Sign extended 30 static const uint64_t SExtOffs = 1; 31 static const uint64_t InReg = 1ULL<<2; ///< Passed in register 32 static const uint64_t InRegOffs = 2; 33 static const uint64_t SRet = 1ULL<<3; ///< Hidden struct-ret ptr 34 static const uint64_t SRetOffs = 3; 35 static const uint64_t ByVal = 1ULL<<4; ///< Struct passed by value 36 static const uint64_t ByValOffs = 4; 37 static const uint64_t Nest = 1ULL<<5; ///< Nested fn static chain 38 static const uint64_t NestOffs = 5; 39 static const uint64_t ByValAlign = 0xFULL << 6; ///< Struct alignment 40 static const uint64_t ByValAlignOffs = 6; 41 static const uint64_t Split = 1ULL << 10; 42 static const uint64_t SplitOffs = 10; 43 static const uint64_t OrigAlign = 0x1FULL<<27; 44 static const uint64_t OrigAlignOffs = 27; 45 static const uint64_t ByValSize = 0xffffffffULL << 32; ///< Struct size 46 static const uint64_t ByValSizeOffs = 32; 47 48 static const uint64_t One = 1ULL; ///< 1 of this type, for shifts 49 50 uint64_t Flags; 51 public: ArgFlagsTyArgFlagsTy52 ArgFlagsTy() : Flags(0) { } 53 isZExtArgFlagsTy54 bool isZExt() const { return Flags & ZExt; } setZExtArgFlagsTy55 void setZExt() { Flags |= One << ZExtOffs; } 56 isSExtArgFlagsTy57 bool isSExt() const { return Flags & SExt; } setSExtArgFlagsTy58 void setSExt() { Flags |= One << SExtOffs; } 59 isInRegArgFlagsTy60 bool isInReg() const { return Flags & InReg; } setInRegArgFlagsTy61 void setInReg() { Flags |= One << InRegOffs; } 62 isSRetArgFlagsTy63 bool isSRet() const { return Flags & SRet; } setSRetArgFlagsTy64 void setSRet() { Flags |= One << SRetOffs; } 65 isByValArgFlagsTy66 bool isByVal() const { return Flags & ByVal; } setByValArgFlagsTy67 void setByVal() { Flags |= One << ByValOffs; } 68 isNestArgFlagsTy69 bool isNest() const { return Flags & Nest; } setNestArgFlagsTy70 void setNest() { Flags |= One << NestOffs; } 71 getByValAlignArgFlagsTy72 unsigned getByValAlign() const { 73 return (unsigned) 74 ((One << ((Flags & ByValAlign) >> ByValAlignOffs)) / 2); 75 } setByValAlignArgFlagsTy76 void setByValAlign(unsigned A) { 77 Flags = (Flags & ~ByValAlign) | 78 (uint64_t(Log2_32(A) + 1) << ByValAlignOffs); 79 } 80 isSplitArgFlagsTy81 bool isSplit() const { return Flags & Split; } setSplitArgFlagsTy82 void setSplit() { Flags |= One << SplitOffs; } 83 getOrigAlignArgFlagsTy84 unsigned getOrigAlign() const { 85 return (unsigned) 86 ((One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2); 87 } setOrigAlignArgFlagsTy88 void setOrigAlign(unsigned A) { 89 Flags = (Flags & ~OrigAlign) | 90 (uint64_t(Log2_32(A) + 1) << OrigAlignOffs); 91 } 92 getByValSizeArgFlagsTy93 unsigned getByValSize() const { 94 return (unsigned)((Flags & ByValSize) >> ByValSizeOffs); 95 } setByValSizeArgFlagsTy96 void setByValSize(unsigned S) { 97 Flags = (Flags & ~ByValSize) | (uint64_t(S) << ByValSizeOffs); 98 } 99 100 /// getArgFlagsString - Returns the flags as a string, eg: "zext align:4". 101 std::string getArgFlagsString(); 102 103 /// getRawBits - Represent the flags as a bunch of bits. getRawBitsArgFlagsTy104 uint64_t getRawBits() const { return Flags; } 105 }; 106 107 /// InputArg - This struct carries flags and type information about a 108 /// single incoming (formal) argument or incoming (from the perspective 109 /// of the caller) return value virtual register. 110 /// 111 struct InputArg { 112 ArgFlagsTy Flags; 113 MVT VT; 114 bool Used; 115 InputArgInputArg116 InputArg() : VT(MVT::Other), Used(false) {} InputArgInputArg117 InputArg(ArgFlagsTy flags, EVT vt, bool used) 118 : Flags(flags), Used(used) { 119 VT = vt.getSimpleVT(); 120 } 121 }; 122 123 /// OutputArg - This struct carries flags and a value for a 124 /// single outgoing (actual) argument or outgoing (from the perspective 125 /// of the caller) return value virtual register. 126 /// 127 struct OutputArg { 128 ArgFlagsTy Flags; 129 MVT VT; 130 131 /// IsFixed - Is this a "fixed" value, ie not passed through a vararg "...". 132 bool IsFixed; 133 OutputArgOutputArg134 OutputArg() : IsFixed(false) {} OutputArgOutputArg135 OutputArg(ArgFlagsTy flags, EVT vt, bool isfixed) 136 : Flags(flags), IsFixed(isfixed) { 137 VT = vt.getSimpleVT(); 138 } 139 }; 140 } 141 142 } // end llvm namespace 143 144 #endif 145