Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/i386/winnt-cxx.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | f6334be47118 |
| rev | line source |
|---|---|
| 0 | 1 /* Target support for C++ classes on Windows. |
| 2 Contributed by Danny Smith (dannysmith@users.sourceforge.net) | |
|
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3 Copyright (C) 2005, 2007, 2009 Free Software Foundation, Inc. |
| 0 | 4 |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 24 #include "tm.h" | |
| 25 #include "rtl.h" | |
| 26 #include "regs.h" | |
| 27 #include "hard-reg-set.h" | |
| 28 #include "output.h" | |
| 29 #include "tree.h" | |
|
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30 #include "cp/cp-tree.h" /* This is why we're a separate module. */ |
| 0 | 31 #include "flags.h" |
| 32 #include "tm_p.h" | |
| 33 #include "toplev.h" | |
| 34 #include "hashtab.h" | |
| 35 | |
| 36 bool | |
| 37 i386_pe_type_dllimport_p (tree decl) | |
| 38 { | |
| 39 gcc_assert (TREE_CODE (decl) == VAR_DECL | |
| 40 || TREE_CODE (decl) == FUNCTION_DECL); | |
| 41 | |
| 42 if (TARGET_NOP_FUN_DLLIMPORT && TREE_CODE (decl) == FUNCTION_DECL) | |
| 43 return false; | |
| 44 | |
| 45 /* We ignore the dllimport attribute for inline member functions. | |
| 46 This differs from MSVC behavior which treats it like GNUC | |
| 47 'extern inline' extension. Also ignore for template | |
| 48 instantiations with linkonce semantics and artificial methods. */ | |
| 49 if (TREE_CODE (decl) == FUNCTION_DECL | |
| 50 && (DECL_DECLARED_INLINE_P (decl) | |
| 51 || DECL_TEMPLATE_INSTANTIATION (decl) | |
| 52 || DECL_ARTIFICIAL (decl))) | |
| 53 return false; | |
|
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54 |
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55 /* Overrides of the class dllimport decls by out-of-class definitions are |
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56 handled by tree.c:merge_dllimport_decl_attributes. */ |
| 0 | 57 return true; |
| 58 } | |
| 59 | |
| 60 bool | |
| 61 i386_pe_type_dllexport_p (tree decl) | |
| 62 { | |
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63 gcc_assert (TREE_CODE (decl) == VAR_DECL |
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64 || TREE_CODE (decl) == FUNCTION_DECL); |
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65 |
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66 /* Avoid exporting compiler-generated default dtors and copy ctors. |
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67 The only artificial methods that need to be exported are virtual |
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68 and non-virtual thunks. */ |
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69 if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE |
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70 && DECL_ARTIFICIAL (decl) && !DECL_THUNK_P (decl)) |
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71 return false; |
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72 return true; |
| 0 | 73 } |
| 74 | |
| 75 static inline void maybe_add_dllimport (tree decl) | |
| 76 { | |
| 77 if (i386_pe_type_dllimport_p (decl)) | |
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78 DECL_DLLIMPORT_P (decl) = 1; |
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79 } |
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80 |
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81 static inline void maybe_add_dllexport (tree decl) |
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82 { |
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83 if (i386_pe_type_dllexport_p (decl)) |
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84 { |
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85 tree decl_attrs = DECL_ATTRIBUTES (decl); |
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86 if (lookup_attribute ("dllexport", decl_attrs) != NULL_TREE) |
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87 /* Already done. */ |
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88 return; |
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89 DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("dllexport"), |
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90 NULL_TREE, decl_attrs); |
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91 } |
| 0 | 92 } |
| 93 | |
| 94 void | |
| 95 i386_pe_adjust_class_at_definition (tree t) | |
| 96 { | |
| 97 tree member; | |
| 98 | |
| 99 gcc_assert (CLASS_TYPE_P (t)); | |
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100 |
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101 |
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102 if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (t)) != NULL_TREE) |
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103 { |
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104 /* Check static VAR_DECL's. */ |
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105 for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) |
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106 if (TREE_CODE (member) == VAR_DECL) |
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107 maybe_add_dllexport (member); |
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108 |
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109 /* Check FUNCTION_DECL's. */ |
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110 for (member = TYPE_METHODS (t); member; member = TREE_CHAIN (member)) |
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111 if (TREE_CODE (member) == FUNCTION_DECL) |
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112 { |
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113 tree thunk; |
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114 maybe_add_dllexport (member); |
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115 |
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116 /* Also add the attribute to its thunks. */ |
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117 for (thunk = DECL_THUNKS (member); thunk; |
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118 thunk = TREE_CHAIN (thunk)) |
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119 maybe_add_dllexport (thunk); |
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120 } |
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121 /* Check vtables */ |
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122 for (member = CLASSTYPE_VTABLES (t); member; member = TREE_CHAIN (member)) |
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123 if (TREE_CODE (member) == VAR_DECL) |
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124 maybe_add_dllexport (member); |
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125 } |
| 0 | 126 |
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127 else if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (t)) != NULL_TREE) |
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128 { |
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129 /* We don't actually add the attribute to the decl, just set the flag |
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130 that signals that the address of this symbol is not a compile-time |
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131 constant. Any subsequent out-of-class declaration of members wil |
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132 cause the DECL_DLLIMPORT_P flag to be unset. |
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133 (See tree.c: merge_dllimport_decl_attributes). |
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134 That is just right since out-of class declarations can only be a |
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135 definition. */ |
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136 |
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137 /* Check static VAR_DECL's. */ |
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138 for (member = TYPE_FIELDS (t); member; member = TREE_CHAIN (member)) |
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139 if (TREE_CODE (member) == VAR_DECL) |
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140 maybe_add_dllimport (member); |
| 0 | 141 |
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142 /* Check FUNCTION_DECL's. */ |
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143 for (member = TYPE_METHODS (t); member; member = TREE_CHAIN (member)) |
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144 if (TREE_CODE (member) == FUNCTION_DECL) |
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145 { |
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146 tree thunk; |
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147 maybe_add_dllimport (member); |
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148 |
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149 /* Also add the attribute to its thunks. */ |
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150 for (thunk = DECL_THUNKS (member); thunk; |
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151 thunk = TREE_CHAIN (thunk)) |
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152 maybe_add_dllimport (thunk); |
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153 } |
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155 /* Check vtables */ |
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156 for (member = CLASSTYPE_VTABLES (t); member; member = TREE_CHAIN (member)) |
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157 if (TREE_CODE (member) == VAR_DECL) |
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158 maybe_add_dllimport (member); |
| 0 | 159 |
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160 /* We leave typeinfo tables alone. We can't mark TI objects as |
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161 dllimport, since the address of a secondary VTT may be needed |
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162 for static initialization of a primary VTT. VTT's of |
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163 dllimport'd classes should always be link-once COMDAT. */ |
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164 } |
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