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annotate include/llvm/Target/TargetCallingConv.h @ 77:54457678186b LLVM3.6

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children 60c9769439b8
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1 //===-- llvm/Target/TargetCallingConv.h - Calling Convention ----*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file defines types for working with calling-convention information.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #ifndef LLVM_TARGET_TARGETCALLINGCONV_H
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15 #define LLVM_TARGET_TARGETCALLINGCONV_H
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16
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17 #include "llvm/CodeGen/ValueTypes.h"
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18 #include "llvm/Support/DataTypes.h"
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19 #include "llvm/Support/MathExtras.h"
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20 #include <string>
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21
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22 namespace llvm {
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23
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24 namespace ISD {
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25 struct ArgFlagsTy {
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26 private:
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27 static const uint64_t NoFlagSet = 0ULL;
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28 static const uint64_t ZExt = 1ULL<<0; ///< Zero extended
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29 static const uint64_t ZExtOffs = 0;
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30 static const uint64_t SExt = 1ULL<<1; ///< Sign extended
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31 static const uint64_t SExtOffs = 1;
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32 static const uint64_t InReg = 1ULL<<2; ///< Passed in register
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33 static const uint64_t InRegOffs = 2;
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34 static const uint64_t SRet = 1ULL<<3; ///< Hidden struct-ret ptr
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35 static const uint64_t SRetOffs = 3;
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36 static const uint64_t ByVal = 1ULL<<4; ///< Struct passed by value
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37 static const uint64_t ByValOffs = 4;
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38 static const uint64_t Nest = 1ULL<<5; ///< Nested fn static chain
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39 static const uint64_t NestOffs = 5;
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40 static const uint64_t Returned = 1ULL<<6; ///< Always returned
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41 static const uint64_t ReturnedOffs = 6;
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42 static const uint64_t ByValAlign = 0xFULL<<7; ///< Struct alignment
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43 static const uint64_t ByValAlignOffs = 7;
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44 static const uint64_t Split = 1ULL<<11;
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45 static const uint64_t SplitOffs = 11;
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46 static const uint64_t InAlloca = 1ULL<<12; ///< Passed with inalloca
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47 static const uint64_t InAllocaOffs = 12;
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48 static const uint64_t OrigAlign = 0x1FULL<<27;
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49 static const uint64_t OrigAlignOffs = 27;
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50 static const uint64_t ByValSize = 0x3fffffffULL<<32; ///< Struct size
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51 static const uint64_t ByValSizeOffs = 32;
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52 static const uint64_t InConsecutiveRegsLast = 0x1ULL<<62; ///< Struct size
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53 static const uint64_t InConsecutiveRegsLastOffs = 62;
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54 static const uint64_t InConsecutiveRegs = 0x1ULL<<63; ///< Struct size
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55 static const uint64_t InConsecutiveRegsOffs = 63;
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56
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57 static const uint64_t One = 1ULL; ///< 1 of this type, for shifts
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58
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59 uint64_t Flags;
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60 public:
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61 ArgFlagsTy() : Flags(0) { }
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62
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63 bool isZExt() const { return Flags & ZExt; }
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64 void setZExt() { Flags |= One << ZExtOffs; }
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65
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66 bool isSExt() const { return Flags & SExt; }
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67 void setSExt() { Flags |= One << SExtOffs; }
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68
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69 bool isInReg() const { return Flags & InReg; }
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70 void setInReg() { Flags |= One << InRegOffs; }
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71
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72 bool isSRet() const { return Flags & SRet; }
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73 void setSRet() { Flags |= One << SRetOffs; }
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74
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75 bool isByVal() const { return Flags & ByVal; }
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76 void setByVal() { Flags |= One << ByValOffs; }
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77
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78 bool isInAlloca() const { return Flags & InAlloca; }
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79 void setInAlloca() { Flags |= One << InAllocaOffs; }
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80
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81 bool isNest() const { return Flags & Nest; }
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82 void setNest() { Flags |= One << NestOffs; }
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83
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84 bool isReturned() const { return Flags & Returned; }
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85 void setReturned() { Flags |= One << ReturnedOffs; }
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86
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87 bool isInConsecutiveRegs() const { return Flags & InConsecutiveRegs; }
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88 void setInConsecutiveRegs() { Flags |= One << InConsecutiveRegsOffs; }
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89
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90 bool isInConsecutiveRegsLast() const { return Flags & InConsecutiveRegsLast; }
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91 void setInConsecutiveRegsLast() { Flags |= One << InConsecutiveRegsLastOffs; }
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92
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93 unsigned getByValAlign() const {
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94 return (unsigned)
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95 ((One << ((Flags & ByValAlign) >> ByValAlignOffs)) / 2);
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96 }
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97 void setByValAlign(unsigned A) {
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98 Flags = (Flags & ~ByValAlign) |
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99 (uint64_t(Log2_32(A) + 1) << ByValAlignOffs);
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100 }
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101
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102 bool isSplit() const { return Flags & Split; }
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103 void setSplit() { Flags |= One << SplitOffs; }
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104
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105 unsigned getOrigAlign() const {
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106 return (unsigned)
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107 ((One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2);
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108 }
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109 void setOrigAlign(unsigned A) {
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110 Flags = (Flags & ~OrigAlign) |
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111 (uint64_t(Log2_32(A) + 1) << OrigAlignOffs);
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112 }
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113
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114 unsigned getByValSize() const {
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115 return (unsigned)((Flags & ByValSize) >> ByValSizeOffs);
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116 }
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117 void setByValSize(unsigned S) {
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118 Flags = (Flags & ~ByValSize) | (uint64_t(S) << ByValSizeOffs);
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119 }
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120
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121 /// getRawBits - Represent the flags as a bunch of bits.
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122 uint64_t getRawBits() const { return Flags; }
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123 };
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124
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125 /// InputArg - This struct carries flags and type information about a
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126 /// single incoming (formal) argument or incoming (from the perspective
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127 /// of the caller) return value virtual register.
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128 ///
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129 struct InputArg {
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130 ArgFlagsTy Flags;
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131 MVT VT;
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132 EVT ArgVT;
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133 bool Used;
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134
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135 /// Index original Function's argument.
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136 unsigned OrigArgIndex;
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137
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138 /// Offset in bytes of current input value relative to the beginning of
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139 /// original argument. E.g. if argument was splitted into four 32 bit
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140 /// registers, we got 4 InputArgs with PartOffsets 0, 4, 8 and 12.
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141 unsigned PartOffset;
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142
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143 InputArg() : VT(MVT::Other), Used(false) {}
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144 InputArg(ArgFlagsTy flags, EVT vt, EVT argvt, bool used,
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145 unsigned origIdx, unsigned partOffs)
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146 : Flags(flags), Used(used), OrigArgIndex(origIdx), PartOffset(partOffs) {
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147 VT = vt.getSimpleVT();
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148 ArgVT = argvt;
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149 }
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150 };
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151
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152 /// OutputArg - This struct carries flags and a value for a
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153 /// single outgoing (actual) argument or outgoing (from the perspective
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154 /// of the caller) return value virtual register.
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155 ///
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156 struct OutputArg {
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157 ArgFlagsTy Flags;
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158 MVT VT;
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159 EVT ArgVT;
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160
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161 /// IsFixed - Is this a "fixed" value, ie not passed through a vararg "...".
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162 bool IsFixed;
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163
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164 /// Index original Function's argument.
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165 unsigned OrigArgIndex;
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166
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167 /// Offset in bytes of current output value relative to the beginning of
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168 /// original argument. E.g. if argument was splitted into four 32 bit
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169 /// registers, we got 4 OutputArgs with PartOffsets 0, 4, 8 and 12.
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170 unsigned PartOffset;
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171
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172 OutputArg() : IsFixed(false) {}
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173 OutputArg(ArgFlagsTy flags, EVT vt, EVT argvt, bool isfixed,
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174 unsigned origIdx, unsigned partOffs)
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175 : Flags(flags), IsFixed(isfixed), OrigArgIndex(origIdx),
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176 PartOffset(partOffs) {
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177 VT = vt.getSimpleVT();
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178 ArgVT = argvt;
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179 }
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180 };
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181 }
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182
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183 } // end llvm namespace
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184
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185 #endif