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0
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1 /* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
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2 Copyright (C) 1992, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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3 2006, 2007, 2008 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #include "config.h"
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22 #include "system.h"
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23 #include "coretypes.h"
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24 #include "tm.h"
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25 #include "rtl.h"
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26 #include "tree.h"
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27 #include "function.h"
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28 #include "cpplib.h"
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29 #include "c-pragma.h"
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30 #include "flags.h"
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31 #include "toplev.h"
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32 #include "ggc.h"
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33 #include "c-common.h"
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34 #include "output.h"
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35 #include "tm_p.h"
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36 #include "vec.h"
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37 #include "target.h"
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38 #include "diagnostic.h"
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39 #include "opts.h"
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40
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41 #define GCC_BAD(gmsgid) \
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42 do { warning (OPT_Wpragmas, gmsgid); return; } while (0)
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43 #define GCC_BAD2(gmsgid, arg) \
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44 do { warning (OPT_Wpragmas, gmsgid, arg); return; } while (0)
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45
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46 typedef struct align_stack GTY(())
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47 {
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48 int alignment;
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49 tree id;
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50 struct align_stack * prev;
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51 } align_stack;
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52
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53 static GTY(()) struct align_stack * alignment_stack;
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54
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55 #ifdef HANDLE_PRAGMA_PACK
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56 static void handle_pragma_pack (cpp_reader *);
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57
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58 #ifdef HANDLE_PRAGMA_PACK_PUSH_POP
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59 /* If we have a "global" #pragma pack(<n>) in effect when the first
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60 #pragma pack(push,<n>) is encountered, this stores the value of
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61 maximum_field_alignment in effect. When the final pop_alignment()
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62 happens, we restore the value to this, not to a value of 0 for
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63 maximum_field_alignment. Value is in bits. */
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64 static int default_alignment;
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65 #define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = *(alignment_stack == NULL \
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66 ? &default_alignment \
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67 : &alignment_stack->alignment) = (ALIGN))
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68
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69 static void push_alignment (int, tree);
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70 static void pop_alignment (tree);
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71
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72 /* Push an alignment value onto the stack. */
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73 static void
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74 push_alignment (int alignment, tree id)
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75 {
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76 align_stack * entry;
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77
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78 entry = GGC_NEW (align_stack);
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79
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80 entry->alignment = alignment;
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81 entry->id = id;
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82 entry->prev = alignment_stack;
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83
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84 /* The current value of maximum_field_alignment is not necessarily
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85 0 since there may be a #pragma pack(<n>) in effect; remember it
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86 so that we can restore it after the final #pragma pop(). */
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87 if (alignment_stack == NULL)
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88 default_alignment = maximum_field_alignment;
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89
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90 alignment_stack = entry;
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91
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92 maximum_field_alignment = alignment;
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93 }
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94
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95 /* Undo a push of an alignment onto the stack. */
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96 static void
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97 pop_alignment (tree id)
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98 {
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99 align_stack * entry;
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100
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101 if (alignment_stack == NULL)
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102 GCC_BAD ("#pragma pack (pop) encountered without matching #pragma pack (push)");
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103
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104 /* If we got an identifier, strip away everything above the target
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105 entry so that the next step will restore the state just below it. */
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106 if (id)
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107 {
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108 for (entry = alignment_stack; entry; entry = entry->prev)
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109 if (entry->id == id)
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110 {
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111 alignment_stack = entry;
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112 break;
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113 }
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114 if (entry == NULL)
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115 warning (OPT_Wpragmas, "\
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116 #pragma pack(pop, %s) encountered without matching #pragma pack(push, %s)"
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117 , IDENTIFIER_POINTER (id), IDENTIFIER_POINTER (id));
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118 }
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119
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120 entry = alignment_stack->prev;
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121
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122 maximum_field_alignment = entry ? entry->alignment : default_alignment;
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123
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124 alignment_stack = entry;
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125 }
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126 #else /* not HANDLE_PRAGMA_PACK_PUSH_POP */
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127 #define SET_GLOBAL_ALIGNMENT(ALIGN) (maximum_field_alignment = (ALIGN))
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128 #define push_alignment(ID, N) \
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129 GCC_BAD ("#pragma pack(push[, id], <n>) is not supported on this target")
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130 #define pop_alignment(ID) \
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131 GCC_BAD ("#pragma pack(pop[, id], <n>) is not supported on this target")
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132 #endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
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133
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134 /* #pragma pack ()
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135 #pragma pack (N)
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136
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137 #pragma pack (push)
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138 #pragma pack (push, N)
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139 #pragma pack (push, ID)
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140 #pragma pack (push, ID, N)
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141 #pragma pack (pop)
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142 #pragma pack (pop, ID) */
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143 static void
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144 handle_pragma_pack (cpp_reader * ARG_UNUSED (dummy))
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145 {
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146 tree x, id = 0;
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147 int align = -1;
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148 enum cpp_ttype token;
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149 enum { set, push, pop } action;
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150
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151 if (pragma_lex (&x) != CPP_OPEN_PAREN)
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152 GCC_BAD ("missing %<(%> after %<#pragma pack%> - ignored");
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153
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154 token = pragma_lex (&x);
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155 if (token == CPP_CLOSE_PAREN)
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156 {
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157 action = set;
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158 align = initial_max_fld_align;
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159 }
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160 else if (token == CPP_NUMBER)
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161 {
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162 if (TREE_CODE (x) != INTEGER_CST)
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163 GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
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164 align = TREE_INT_CST_LOW (x);
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165 action = set;
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166 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
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167 GCC_BAD ("malformed %<#pragma pack%> - ignored");
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168 }
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169 else if (token == CPP_NAME)
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170 {
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171 #define GCC_BAD_ACTION do { if (action != pop) \
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172 GCC_BAD ("malformed %<#pragma pack(push[, id][, <n>])%> - ignored"); \
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173 else \
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174 GCC_BAD ("malformed %<#pragma pack(pop[, id])%> - ignored"); \
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175 } while (0)
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176
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177 const char *op = IDENTIFIER_POINTER (x);
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178 if (!strcmp (op, "push"))
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179 action = push;
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180 else if (!strcmp (op, "pop"))
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181 action = pop;
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182 else
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183 GCC_BAD2 ("unknown action %qs for %<#pragma pack%> - ignored", op);
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184
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185 while ((token = pragma_lex (&x)) == CPP_COMMA)
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186 {
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187 token = pragma_lex (&x);
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188 if (token == CPP_NAME && id == 0)
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189 {
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190 id = x;
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191 }
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192 else if (token == CPP_NUMBER && action == push && align == -1)
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193 {
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194 if (TREE_CODE (x) != INTEGER_CST)
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195 GCC_BAD ("invalid constant in %<#pragma pack%> - ignored");
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196 align = TREE_INT_CST_LOW (x);
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197 if (align == -1)
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198 action = set;
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199 }
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200 else
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201 GCC_BAD_ACTION;
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202 }
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203
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204 if (token != CPP_CLOSE_PAREN)
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205 GCC_BAD_ACTION;
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206 #undef GCC_BAD_ACTION
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207 }
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208 else
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209 GCC_BAD ("malformed %<#pragma pack%> - ignored");
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210
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211 if (pragma_lex (&x) != CPP_EOF)
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212 warning (OPT_Wpragmas, "junk at end of %<#pragma pack%>");
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213
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214 if (flag_pack_struct)
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215 GCC_BAD ("#pragma pack has no effect with -fpack-struct - ignored");
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216
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217 if (action != pop)
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218 switch (align)
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219 {
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220 case 0:
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221 case 1:
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222 case 2:
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223 case 4:
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224 case 8:
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225 case 16:
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226 align *= BITS_PER_UNIT;
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227 break;
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228 case -1:
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229 if (action == push)
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230 {
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231 align = maximum_field_alignment;
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232 break;
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233 }
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234 default:
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235 GCC_BAD2 ("alignment must be a small power of two, not %d", align);
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236 }
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237
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238 switch (action)
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239 {
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240 case set: SET_GLOBAL_ALIGNMENT (align); break;
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241 case push: push_alignment (align, id); break;
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242 case pop: pop_alignment (id); break;
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243 }
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244 }
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245 #endif /* HANDLE_PRAGMA_PACK */
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246
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247 static GTY(()) tree pending_weaks;
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248
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249 #ifdef HANDLE_PRAGMA_WEAK
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250 static void apply_pragma_weak (tree, tree);
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251 static void handle_pragma_weak (cpp_reader *);
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252
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253 static void
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254 apply_pragma_weak (tree decl, tree value)
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255 {
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256 if (value)
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257 {
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258 value = build_string (IDENTIFIER_LENGTH (value),
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259 IDENTIFIER_POINTER (value));
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260 decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
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261 build_tree_list (NULL, value)),
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262 0);
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263 }
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264
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265 if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
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266 && !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */
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267 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
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268 warning (OPT_Wpragmas, "applying #pragma weak %q+D after first use "
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269 "results in unspecified behavior", decl);
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270
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271 declare_weak (decl);
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272 }
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273
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274 void
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275 maybe_apply_pragma_weak (tree decl)
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276 {
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277 tree *p, t, id;
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278
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279 /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
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280
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281 /* No weak symbols pending, take the short-cut. */
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282 if (!pending_weaks)
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283 return;
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284 /* If it's not visible outside this file, it doesn't matter whether
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285 it's weak. */
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286 if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
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287 return;
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288 /* If it's not a function or a variable, it can't be weak.
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289 FIXME: what kinds of things are visible outside this file but
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290 aren't functions or variables? Should this be an assert instead? */
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291 if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
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292 return;
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293
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294 id = DECL_ASSEMBLER_NAME (decl);
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295
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296 for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t))
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297 if (id == TREE_PURPOSE (t))
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298 {
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299 apply_pragma_weak (decl, TREE_VALUE (t));
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300 *p = TREE_CHAIN (t);
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301 break;
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302 }
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303 }
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304
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305 /* Process all "#pragma weak A = B" directives where we have not seen
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306 a decl for A. */
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307 void
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308 maybe_apply_pending_pragma_weaks (void)
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309 {
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310 tree *p, t, alias_id, id, decl, *next;
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311
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312 for (p = &pending_weaks; (t = *p) ; p = next)
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313 {
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314 next = &TREE_CHAIN (t);
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315 alias_id = TREE_PURPOSE (t);
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316 id = TREE_VALUE (t);
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317
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318 if (TREE_VALUE (t) == NULL)
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319 continue;
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320
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321 decl = build_decl (FUNCTION_DECL, alias_id, default_function_type);
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322
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323 DECL_ARTIFICIAL (decl) = 1;
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324 TREE_PUBLIC (decl) = 1;
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325 DECL_EXTERNAL (decl) = 1;
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326 DECL_WEAK (decl) = 1;
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327
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328 assemble_alias (decl, id);
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329 }
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330 }
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331
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332 /* #pragma weak name [= value] */
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333 static void
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334 handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy))
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335 {
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336 tree name, value, x, decl;
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337 enum cpp_ttype t;
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338
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339 value = 0;
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340
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341 if (pragma_lex (&name) != CPP_NAME)
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342 GCC_BAD ("malformed #pragma weak, ignored");
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343 t = pragma_lex (&x);
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344 if (t == CPP_EQ)
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345 {
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346 if (pragma_lex (&value) != CPP_NAME)
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347 GCC_BAD ("malformed #pragma weak, ignored");
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348 t = pragma_lex (&x);
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349 }
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350 if (t != CPP_EOF)
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351 warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>");
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352
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353 decl = identifier_global_value (name);
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354 if (decl && DECL_P (decl))
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355 {
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356 apply_pragma_weak (decl, value);
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357 if (value)
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358 assemble_alias (decl, value);
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359 }
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360 else
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361 pending_weaks = tree_cons (name, value, pending_weaks);
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362 }
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363 #else
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364 void
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365 maybe_apply_pragma_weak (tree ARG_UNUSED (decl))
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366 {
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367 }
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368
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369 void
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370 maybe_apply_pending_pragma_weaks (void)
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371 {
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372 }
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373 #endif /* HANDLE_PRAGMA_WEAK */
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374
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375 /* GCC supports two #pragma directives for renaming the external
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376 symbol associated with a declaration (DECL_ASSEMBLER_NAME), for
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377 compatibility with the Solaris and Tru64 system headers. GCC also
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378 has its own notation for this, __asm__("name") annotations.
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379
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380 Corner cases of these features and their interaction:
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381
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382 1) Both pragmas silently apply only to declarations with external
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383 linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels
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384 do not have this restriction.
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385
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386 2) In C++, both #pragmas silently apply only to extern "C" declarations.
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387 Asm labels do not have this restriction.
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388
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389 3) If any of the three ways of changing DECL_ASSEMBLER_NAME is
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390 applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the
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391 new name is different, a warning issues and the name does not change.
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392
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393 4) The "source name" for #pragma redefine_extname is the DECL_NAME,
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394 *not* the DECL_ASSEMBLER_NAME.
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395
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396 5) If #pragma extern_prefix is in effect and a declaration occurs
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397 with an __asm__ name, the #pragma extern_prefix is silently
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398 ignored for that declaration.
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399
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400 6) If #pragma extern_prefix and #pragma redefine_extname apply to
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401 the same declaration, whichever triggered first wins, and a warning
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402 is issued. (We would like to have #pragma redefine_extname always
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403 win, but it can appear either before or after the declaration, and
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404 if it appears afterward, we have no way of knowing whether a modified
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405 DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */
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406
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407 static GTY(()) tree pending_redefine_extname;
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408
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409 static void handle_pragma_redefine_extname (cpp_reader *);
|
|
|
410
|
|
|
411 /* #pragma redefine_extname oldname newname */
|
|
|
412 static void
|
|
|
413 handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy))
|
|
|
414 {
|
|
|
415 tree oldname, newname, decl, x;
|
|
|
416 enum cpp_ttype t;
|
|
|
417
|
|
|
418 if (pragma_lex (&oldname) != CPP_NAME)
|
|
|
419 GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
|
|
420 if (pragma_lex (&newname) != CPP_NAME)
|
|
|
421 GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
|
|
422 t = pragma_lex (&x);
|
|
|
423 if (t != CPP_EOF)
|
|
|
424 warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>");
|
|
|
425
|
|
|
426 if (!flag_mudflap && !targetm.handle_pragma_redefine_extname)
|
|
|
427 {
|
|
|
428 if (warn_unknown_pragmas > in_system_header)
|
|
|
429 warning (OPT_Wunknown_pragmas,
|
|
|
430 "#pragma redefine_extname not supported on this target");
|
|
|
431 return;
|
|
|
432 }
|
|
|
433
|
|
|
434 decl = identifier_global_value (oldname);
|
|
|
435 if (decl
|
|
|
436 && (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
|
|
|
437 && (TREE_CODE (decl) == FUNCTION_DECL
|
|
|
438 || TREE_CODE (decl) == VAR_DECL)
|
|
|
439 && has_c_linkage (decl))
|
|
|
440 {
|
|
|
441 if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
|
|
442 {
|
|
|
443 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
|
444 name = targetm.strip_name_encoding (name);
|
|
|
445
|
|
|
446 if (strcmp (name, IDENTIFIER_POINTER (newname)))
|
|
|
447 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
448 "conflict with previous rename");
|
|
|
449 }
|
|
|
450 else
|
|
|
451 change_decl_assembler_name (decl, newname);
|
|
|
452 }
|
|
|
453 else
|
|
|
454 /* We have to add this to the rename list even if there's already
|
|
|
455 a global value that doesn't meet the above criteria, because in
|
|
|
456 C++ "struct foo {...};" puts "foo" in the current namespace but
|
|
|
457 does *not* conflict with a subsequent declaration of a function
|
|
|
458 or variable foo. See g++.dg/other/pragma-re-2.C. */
|
|
|
459 add_to_renaming_pragma_list (oldname, newname);
|
|
|
460 }
|
|
|
461
|
|
|
462 /* This is called from here and from ia64.c. */
|
|
|
463 void
|
|
|
464 add_to_renaming_pragma_list (tree oldname, tree newname)
|
|
|
465 {
|
|
|
466 tree previous = purpose_member (oldname, pending_redefine_extname);
|
|
|
467 if (previous)
|
|
|
468 {
|
|
|
469 if (TREE_VALUE (previous) != newname)
|
|
|
470 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
471 "conflict with previous #pragma redefine_extname");
|
|
|
472 return;
|
|
|
473 }
|
|
|
474
|
|
|
475 pending_redefine_extname
|
|
|
476 = tree_cons (oldname, newname, pending_redefine_extname);
|
|
|
477 }
|
|
|
478
|
|
|
479 static GTY(()) tree pragma_extern_prefix;
|
|
|
480
|
|
|
481 /* #pragma extern_prefix "prefix" */
|
|
|
482 static void
|
|
|
483 handle_pragma_extern_prefix (cpp_reader * ARG_UNUSED (dummy))
|
|
|
484 {
|
|
|
485 tree prefix, x;
|
|
|
486 enum cpp_ttype t;
|
|
|
487
|
|
|
488 if (pragma_lex (&prefix) != CPP_STRING)
|
|
|
489 GCC_BAD ("malformed #pragma extern_prefix, ignored");
|
|
|
490 t = pragma_lex (&x);
|
|
|
491 if (t != CPP_EOF)
|
|
|
492 warning (OPT_Wpragmas, "junk at end of %<#pragma extern_prefix%>");
|
|
|
493
|
|
|
494 if (targetm.handle_pragma_extern_prefix)
|
|
|
495 /* Note that the length includes the null terminator. */
|
|
|
496 pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL);
|
|
|
497 else if (warn_unknown_pragmas > in_system_header)
|
|
|
498 warning (OPT_Wunknown_pragmas,
|
|
|
499 "#pragma extern_prefix not supported on this target");
|
|
|
500 }
|
|
|
501
|
|
|
502 /* Hook from the front ends to apply the results of one of the preceding
|
|
|
503 pragmas that rename variables. */
|
|
|
504
|
|
|
505 tree
|
|
|
506 maybe_apply_renaming_pragma (tree decl, tree asmname)
|
|
|
507 {
|
|
|
508 tree *p, t;
|
|
|
509
|
|
|
510 /* The renaming pragmas are only applied to declarations with
|
|
|
511 external linkage. */
|
|
|
512 if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
|
|
513 || (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl))
|
|
|
514 || !has_c_linkage (decl))
|
|
|
515 return asmname;
|
|
|
516
|
|
|
517 /* If the DECL_ASSEMBLER_NAME is already set, it does not change,
|
|
|
518 but we may warn about a rename that conflicts. */
|
|
|
519 if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
|
|
520 {
|
|
|
521 const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
|
522 oldname = targetm.strip_name_encoding (oldname);
|
|
|
523
|
|
|
524 if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname))
|
|
|
525 warning (OPT_Wpragmas, "asm declaration ignored due to "
|
|
|
526 "conflict with previous rename");
|
|
|
527
|
|
|
528 /* Take any pending redefine_extname off the list. */
|
|
|
529 for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
|
|
530 if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
|
|
531 {
|
|
|
532 /* Only warn if there is a conflict. */
|
|
|
533 if (strcmp (IDENTIFIER_POINTER (TREE_VALUE (t)), oldname))
|
|
|
534 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
535 "conflict with previous rename");
|
|
|
536
|
|
|
537 *p = TREE_CHAIN (t);
|
|
|
538 break;
|
|
|
539 }
|
|
|
540 return 0;
|
|
|
541 }
|
|
|
542
|
|
|
543 /* Find out if we have a pending #pragma redefine_extname. */
|
|
|
544 for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
|
|
545 if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
|
|
546 {
|
|
|
547 tree newname = TREE_VALUE (t);
|
|
|
548 *p = TREE_CHAIN (t);
|
|
|
549
|
|
|
550 /* If we already have an asmname, #pragma redefine_extname is
|
|
|
551 ignored (with a warning if it conflicts). */
|
|
|
552 if (asmname)
|
|
|
553 {
|
|
|
554 if (strcmp (TREE_STRING_POINTER (asmname),
|
|
|
555 IDENTIFIER_POINTER (newname)) != 0)
|
|
|
556 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
557 "conflict with __asm__ declaration");
|
|
|
558 return asmname;
|
|
|
559 }
|
|
|
560
|
|
|
561 /* Otherwise we use what we've got; #pragma extern_prefix is
|
|
|
562 silently ignored. */
|
|
|
563 return build_string (IDENTIFIER_LENGTH (newname),
|
|
|
564 IDENTIFIER_POINTER (newname));
|
|
|
565 }
|
|
|
566
|
|
|
567 /* If we've got an asmname, #pragma extern_prefix is silently ignored. */
|
|
|
568 if (asmname)
|
|
|
569 return asmname;
|
|
|
570
|
|
|
571 /* If #pragma extern_prefix is in effect, apply it. */
|
|
|
572 if (pragma_extern_prefix)
|
|
|
573 {
|
|
|
574 const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix);
|
|
|
575 size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1;
|
|
|
576
|
|
|
577 const char *id = IDENTIFIER_POINTER (DECL_NAME (decl));
|
|
|
578 size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl));
|
|
|
579
|
|
|
580 char *newname = (char *) alloca (plen + ilen + 1);
|
|
|
581
|
|
|
582 memcpy (newname, prefix, plen);
|
|
|
583 memcpy (newname + plen, id, ilen + 1);
|
|
|
584
|
|
|
585 return build_string (plen + ilen, newname);
|
|
|
586 }
|
|
|
587
|
|
|
588 /* Nada. */
|
|
|
589 return 0;
|
|
|
590 }
|
|
|
591
|
|
|
592
|
|
|
593 #ifdef HANDLE_PRAGMA_VISIBILITY
|
|
|
594 static void handle_pragma_visibility (cpp_reader *);
|
|
|
595
|
|
|
596 typedef enum symbol_visibility visibility;
|
|
|
597 DEF_VEC_I (visibility);
|
|
|
598 DEF_VEC_ALLOC_I (visibility, heap);
|
|
|
599 static VEC (visibility, heap) *visstack;
|
|
|
600
|
|
|
601 /* Push the visibility indicated by STR onto the top of the #pragma
|
|
|
602 visibility stack. */
|
|
|
603
|
|
|
604 void
|
|
|
605 push_visibility (const char *str)
|
|
|
606 {
|
|
|
607 VEC_safe_push (visibility, heap, visstack,
|
|
|
608 default_visibility);
|
|
|
609 if (!strcmp (str, "default"))
|
|
|
610 default_visibility = VISIBILITY_DEFAULT;
|
|
|
611 else if (!strcmp (str, "internal"))
|
|
|
612 default_visibility = VISIBILITY_INTERNAL;
|
|
|
613 else if (!strcmp (str, "hidden"))
|
|
|
614 default_visibility = VISIBILITY_HIDDEN;
|
|
|
615 else if (!strcmp (str, "protected"))
|
|
|
616 default_visibility = VISIBILITY_PROTECTED;
|
|
|
617 else
|
|
|
618 GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected");
|
|
|
619 visibility_options.inpragma = 1;
|
|
|
620 }
|
|
|
621
|
|
|
622 /* Pop a level of the #pragma visibility stack. */
|
|
|
623
|
|
|
624 void
|
|
|
625 pop_visibility (void)
|
|
|
626 {
|
|
|
627 default_visibility = VEC_pop (visibility, visstack);
|
|
|
628 visibility_options.inpragma
|
|
|
629 = VEC_length (visibility, visstack) != 0;
|
|
|
630 }
|
|
|
631
|
|
|
632 /* Sets the default visibility for symbols to something other than that
|
|
|
633 specified on the command line. */
|
|
|
634
|
|
|
635 static void
|
|
|
636 handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED)
|
|
|
637 {
|
|
|
638 /* Form is #pragma GCC visibility push(hidden)|pop */
|
|
|
639 tree x;
|
|
|
640 enum cpp_ttype token;
|
|
|
641 enum { bad, push, pop } action = bad;
|
|
|
642
|
|
|
643 token = pragma_lex (&x);
|
|
|
644 if (token == CPP_NAME)
|
|
|
645 {
|
|
|
646 const char *op = IDENTIFIER_POINTER (x);
|
|
|
647 if (!strcmp (op, "push"))
|
|
|
648 action = push;
|
|
|
649 else if (!strcmp (op, "pop"))
|
|
|
650 action = pop;
|
|
|
651 }
|
|
|
652 if (bad == action)
|
|
|
653 GCC_BAD ("#pragma GCC visibility must be followed by push or pop");
|
|
|
654 else
|
|
|
655 {
|
|
|
656 if (pop == action)
|
|
|
657 {
|
|
|
658 if (!VEC_length (visibility, visstack))
|
|
|
659 GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>");
|
|
|
660 else
|
|
|
661 pop_visibility ();
|
|
|
662 }
|
|
|
663 else
|
|
|
664 {
|
|
|
665 if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
|
|
666 GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
|
|
667 token = pragma_lex (&x);
|
|
|
668 if (token != CPP_NAME)
|
|
|
669 GCC_BAD ("malformed #pragma GCC visibility push");
|
|
|
670 else
|
|
|
671 push_visibility (IDENTIFIER_POINTER (x));
|
|
|
672 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
|
|
673 GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
|
|
674 }
|
|
|
675 }
|
|
|
676 if (pragma_lex (&x) != CPP_EOF)
|
|
|
677 warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>");
|
|
|
678 }
|
|
|
679
|
|
|
680 #endif
|
|
|
681
|
|
|
682 static void
|
|
|
683 handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy))
|
|
|
684 {
|
|
|
685 const char *kind_string, *option_string;
|
|
|
686 unsigned int option_index;
|
|
|
687 enum cpp_ttype token;
|
|
|
688 diagnostic_t kind;
|
|
|
689 tree x;
|
|
|
690
|
|
|
691 if (cfun)
|
|
|
692 {
|
|
|
693 error ("#pragma GCC diagnostic not allowed inside functions");
|
|
|
694 return;
|
|
|
695 }
|
|
|
696
|
|
|
697 token = pragma_lex (&x);
|
|
|
698 if (token != CPP_NAME)
|
|
|
699 GCC_BAD ("missing [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
|
|
700 kind_string = IDENTIFIER_POINTER (x);
|
|
|
701 if (strcmp (kind_string, "error") == 0)
|
|
|
702 kind = DK_ERROR;
|
|
|
703 else if (strcmp (kind_string, "warning") == 0)
|
|
|
704 kind = DK_WARNING;
|
|
|
705 else if (strcmp (kind_string, "ignored") == 0)
|
|
|
706 kind = DK_IGNORED;
|
|
|
707 else
|
|
|
708 GCC_BAD ("expected [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
|
|
709
|
|
|
710 token = pragma_lex (&x);
|
|
|
711 if (token != CPP_STRING)
|
|
|
712 GCC_BAD ("missing option after %<#pragma GCC diagnostic%> kind");
|
|
|
713 option_string = TREE_STRING_POINTER (x);
|
|
|
714 for (option_index = 0; option_index < cl_options_count; option_index++)
|
|
|
715 if (strcmp (cl_options[option_index].opt_text, option_string) == 0)
|
|
|
716 {
|
|
|
717 /* This overrides -Werror, for example. */
|
|
|
718 diagnostic_classify_diagnostic (global_dc, option_index, kind);
|
|
|
719 /* This makes sure the option is enabled, like -Wfoo would do. */
|
|
|
720 if (cl_options[option_index].var_type == CLVC_BOOLEAN
|
|
|
721 && cl_options[option_index].flag_var
|
|
|
722 && kind != DK_IGNORED)
|
|
|
723 *(int *) cl_options[option_index].flag_var = 1;
|
|
|
724 return;
|
|
|
725 }
|
|
|
726 GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind");
|
|
|
727 }
|
|
|
728
|
|
|
729 /* Parse #pragma GCC target (xxx) to set target specific options. */
|
|
|
730 static void
|
|
|
731 handle_pragma_target(cpp_reader *ARG_UNUSED(dummy))
|
|
|
732 {
|
|
|
733 enum cpp_ttype token;
|
|
|
734 tree x;
|
|
|
735 bool close_paren_needed_p = false;
|
|
|
736
|
|
|
737 if (cfun)
|
|
|
738 {
|
|
|
739 error ("#pragma GCC option is not allowed inside functions");
|
|
|
740 return;
|
|
|
741 }
|
|
|
742
|
|
|
743 token = pragma_lex (&x);
|
|
|
744 if (token == CPP_OPEN_PAREN)
|
|
|
745 {
|
|
|
746 close_paren_needed_p = true;
|
|
|
747 token = pragma_lex (&x);
|
|
|
748 }
|
|
|
749
|
|
|
750 if (token != CPP_STRING)
|
|
|
751 {
|
|
|
752 GCC_BAD ("%<#pragma GCC option%> is not a string");
|
|
|
753 return;
|
|
|
754 }
|
|
|
755
|
|
|
756 /* Strings are user options. */
|
|
|
757 else
|
|
|
758 {
|
|
|
759 tree args = NULL_TREE;
|
|
|
760
|
|
|
761 do
|
|
|
762 {
|
|
|
763 /* Build up the strings now as a tree linked list. Skip empty
|
|
|
764 strings. */
|
|
|
765 if (TREE_STRING_LENGTH (x) > 0)
|
|
|
766 args = tree_cons (NULL_TREE, x, args);
|
|
|
767
|
|
|
768 token = pragma_lex (&x);
|
|
|
769 while (token == CPP_COMMA)
|
|
|
770 token = pragma_lex (&x);
|
|
|
771 }
|
|
|
772 while (token == CPP_STRING);
|
|
|
773
|
|
|
774 if (close_paren_needed_p)
|
|
|
775 {
|
|
|
776 if (token == CPP_CLOSE_PAREN)
|
|
|
777 token = pragma_lex (&x);
|
|
|
778 else
|
|
|
779 GCC_BAD ("%<#pragma GCC target (string [,string]...)%> does "
|
|
|
780 "not have a final %<)%>.");
|
|
|
781 }
|
|
|
782
|
|
|
783 if (token != CPP_EOF)
|
|
|
784 {
|
|
|
785 error ("#pragma GCC target string... is badly formed");
|
|
|
786 return;
|
|
|
787 }
|
|
|
788
|
|
|
789 /* put arguments in the order the user typed them. */
|
|
|
790 args = nreverse (args);
|
|
|
791
|
|
|
792 if (targetm.target_option.pragma_parse (args, NULL_TREE))
|
|
|
793 current_target_pragma = args;
|
|
|
794 }
|
|
|
795 }
|
|
|
796
|
|
|
797 /* Handle #pragma GCC optimize to set optimization options. */
|
|
|
798 static void
|
|
|
799 handle_pragma_optimize (cpp_reader *ARG_UNUSED(dummy))
|
|
|
800 {
|
|
|
801 enum cpp_ttype token;
|
|
|
802 tree x;
|
|
|
803 bool close_paren_needed_p = false;
|
|
|
804 tree optimization_previous_node = optimization_current_node;
|
|
|
805
|
|
|
806 if (cfun)
|
|
|
807 {
|
|
|
808 error ("#pragma GCC optimize is not allowed inside functions");
|
|
|
809 return;
|
|
|
810 }
|
|
|
811
|
|
|
812 token = pragma_lex (&x);
|
|
|
813 if (token == CPP_OPEN_PAREN)
|
|
|
814 {
|
|
|
815 close_paren_needed_p = true;
|
|
|
816 token = pragma_lex (&x);
|
|
|
817 }
|
|
|
818
|
|
|
819 if (token != CPP_STRING && token != CPP_NUMBER)
|
|
|
820 {
|
|
|
821 GCC_BAD ("%<#pragma GCC optimize%> is not a string or number");
|
|
|
822 return;
|
|
|
823 }
|
|
|
824
|
|
|
825 /* Strings/numbers are user options. */
|
|
|
826 else
|
|
|
827 {
|
|
|
828 tree args = NULL_TREE;
|
|
|
829
|
|
|
830 do
|
|
|
831 {
|
|
|
832 /* Build up the numbers/strings now as a list. */
|
|
|
833 if (token != CPP_STRING || TREE_STRING_LENGTH (x) > 0)
|
|
|
834 args = tree_cons (NULL_TREE, x, args);
|
|
|
835
|
|
|
836 token = pragma_lex (&x);
|
|
|
837 while (token == CPP_COMMA)
|
|
|
838 token = pragma_lex (&x);
|
|
|
839 }
|
|
|
840 while (token == CPP_STRING || token == CPP_NUMBER);
|
|
|
841
|
|
|
842 if (close_paren_needed_p)
|
|
|
843 {
|
|
|
844 if (token == CPP_CLOSE_PAREN)
|
|
|
845 token = pragma_lex (&x);
|
|
|
846 else
|
|
|
847 GCC_BAD ("%<#pragma GCC optimize (string [,string]...)%> does "
|
|
|
848 "not have a final %<)%>.");
|
|
|
849 }
|
|
|
850
|
|
|
851 if (token != CPP_EOF)
|
|
|
852 {
|
|
|
853 error ("#pragma GCC optimize string... is badly formed");
|
|
|
854 return;
|
|
|
855 }
|
|
|
856
|
|
|
857 /* put arguments in the order the user typed them. */
|
|
|
858 args = nreverse (args);
|
|
|
859
|
|
|
860 parse_optimize_options (args, false);
|
|
|
861 current_optimize_pragma = chainon (current_optimize_pragma, args);
|
|
|
862 optimization_current_node = build_optimization_node ();
|
|
|
863 c_cpp_builtins_optimize_pragma (parse_in,
|
|
|
864 optimization_previous_node,
|
|
|
865 optimization_current_node);
|
|
|
866 }
|
|
|
867 }
|
|
|
868
|
|
|
869 /* Stack of the #pragma GCC options created with #pragma GCC push_option. Save
|
|
|
870 both the binary representation of the options and the TREE_LIST of
|
|
|
871 strings that will be added to the function's attribute list. */
|
|
|
872 typedef struct opt_stack GTY(())
|
|
|
873 {
|
|
|
874 struct opt_stack *prev;
|
|
|
875 tree target_binary;
|
|
|
876 tree target_strings;
|
|
|
877 tree optimize_binary;
|
|
|
878 tree optimize_strings;
|
|
|
879 } opt_stack;
|
|
|
880
|
|
|
881 static GTY(()) struct opt_stack * options_stack;
|
|
|
882
|
|
|
883 /* Handle #pragma GCC push_options to save the current target and optimization
|
|
|
884 options. */
|
|
|
885
|
|
|
886 static void
|
|
|
887 handle_pragma_push_options (cpp_reader *ARG_UNUSED(dummy))
|
|
|
888 {
|
|
|
889 enum cpp_ttype token;
|
|
|
890 tree x = 0;
|
|
|
891 opt_stack *p;
|
|
|
892
|
|
|
893 token = pragma_lex (&x);
|
|
|
894 if (token != CPP_EOF)
|
|
|
895 {
|
|
|
896 warning (OPT_Wpragmas, "junk at end of %<#pragma push_options%>");
|
|
|
897 return;
|
|
|
898 }
|
|
|
899
|
|
|
900 p = GGC_NEW (opt_stack);
|
|
|
901 p->prev = options_stack;
|
|
|
902 options_stack = p;
|
|
|
903
|
|
|
904 /* Save optimization and target flags in binary format. */
|
|
|
905 p->optimize_binary = build_optimization_node ();
|
|
|
906 p->target_binary = build_target_option_node ();
|
|
|
907
|
|
|
908 /* Save optimization and target flags in string list format. */
|
|
|
909 p->optimize_strings = copy_list (current_optimize_pragma);
|
|
|
910 p->target_strings = copy_list (current_target_pragma);
|
|
|
911 }
|
|
|
912
|
|
|
913 /* Handle #pragma GCC pop_options to restore the current target and
|
|
|
914 optimization options from a previous push_options. */
|
|
|
915
|
|
|
916 static void
|
|
|
917 handle_pragma_pop_options (cpp_reader *ARG_UNUSED(dummy))
|
|
|
918 {
|
|
|
919 enum cpp_ttype token;
|
|
|
920 tree x = 0;
|
|
|
921 opt_stack *p;
|
|
|
922
|
|
|
923 token = pragma_lex (&x);
|
|
|
924 if (token != CPP_EOF)
|
|
|
925 {
|
|
|
926 warning (OPT_Wpragmas, "junk at end of %<#pragma pop_options%>");
|
|
|
927 return;
|
|
|
928 }
|
|
|
929
|
|
|
930 if (! options_stack)
|
|
|
931 {
|
|
|
932 warning (OPT_Wpragmas,
|
|
|
933 "%<#pragma GCC pop_options%> without a corresponding "
|
|
|
934 "%<#pragma GCC push_options%>");
|
|
|
935 return;
|
|
|
936 }
|
|
|
937
|
|
|
938 p = options_stack;
|
|
|
939 options_stack = p->prev;
|
|
|
940
|
|
|
941 if (p->target_binary != target_option_current_node)
|
|
|
942 {
|
|
|
943 (void) targetm.target_option.pragma_parse (NULL_TREE, p->target_binary);
|
|
|
944 target_option_current_node = p->target_binary;
|
|
|
945 }
|
|
|
946
|
|
|
947 if (p->optimize_binary != optimization_current_node)
|
|
|
948 {
|
|
|
949 tree old_optimize = optimization_current_node;
|
|
|
950 cl_optimization_restore (TREE_OPTIMIZATION (p->optimize_binary));
|
|
|
951 c_cpp_builtins_optimize_pragma (parse_in, old_optimize,
|
|
|
952 p->optimize_binary);
|
|
|
953 optimization_current_node = p->optimize_binary;
|
|
|
954 }
|
|
|
955
|
|
|
956 current_target_pragma = p->target_strings;
|
|
|
957 current_optimize_pragma = p->optimize_strings;
|
|
|
958 }
|
|
|
959
|
|
|
960 /* Handle #pragma GCC reset_options to restore the current target and
|
|
|
961 optimization options to the original options used on the command line. */
|
|
|
962
|
|
|
963 static void
|
|
|
964 handle_pragma_reset_options (cpp_reader *ARG_UNUSED(dummy))
|
|
|
965 {
|
|
|
966 enum cpp_ttype token;
|
|
|
967 tree x = 0;
|
|
|
968 tree new_optimize = optimization_default_node;
|
|
|
969 tree new_target = target_option_default_node;
|
|
|
970
|
|
|
971 token = pragma_lex (&x);
|
|
|
972 if (token != CPP_EOF)
|
|
|
973 {
|
|
|
974 warning (OPT_Wpragmas, "junk at end of %<#pragma reset_options%>");
|
|
|
975 return;
|
|
|
976 }
|
|
|
977
|
|
|
978 if (new_target != target_option_current_node)
|
|
|
979 {
|
|
|
980 (void) targetm.target_option.pragma_parse (NULL_TREE, new_target);
|
|
|
981 target_option_current_node = new_target;
|
|
|
982 }
|
|
|
983
|
|
|
984 if (new_optimize != optimization_current_node)
|
|
|
985 {
|
|
|
986 tree old_optimize = optimization_current_node;
|
|
|
987 cl_optimization_restore (TREE_OPTIMIZATION (new_optimize));
|
|
|
988 c_cpp_builtins_optimize_pragma (parse_in, old_optimize, new_optimize);
|
|
|
989 optimization_current_node = new_optimize;
|
|
|
990 }
|
|
|
991
|
|
|
992 current_target_pragma = NULL_TREE;
|
|
|
993 current_optimize_pragma = NULL_TREE;
|
|
|
994 }
|
|
|
995
|
|
|
996 /* Print a plain user-specified message. */
|
|
|
997
|
|
|
998 static void
|
|
|
999 handle_pragma_message (cpp_reader *ARG_UNUSED(dummy))
|
|
|
1000 {
|
|
|
1001 enum cpp_ttype token;
|
|
|
1002 tree x, message = 0;
|
|
|
1003
|
|
|
1004 token = pragma_lex (&x);
|
|
|
1005 if (token == CPP_OPEN_PAREN)
|
|
|
1006 {
|
|
|
1007 token = pragma_lex (&x);
|
|
|
1008 if (token == CPP_STRING)
|
|
|
1009 message = x;
|
|
|
1010 else
|
|
|
1011 GCC_BAD ("expected a string after %<#pragma message%>");
|
|
|
1012 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
|
|
1013 GCC_BAD ("malformed %<#pragma message%>, ignored");
|
|
|
1014 }
|
|
|
1015 else if (token == CPP_STRING)
|
|
|
1016 message = x;
|
|
|
1017 else
|
|
|
1018 GCC_BAD ("expected a string after %<#pragma message%>");
|
|
|
1019
|
|
|
1020 gcc_assert (message);
|
|
|
1021
|
|
|
1022 if (pragma_lex (&x) != CPP_EOF)
|
|
|
1023 warning (OPT_Wpragmas, "junk at end of %<#pragma message%>");
|
|
|
1024
|
|
|
1025 if (TREE_STRING_LENGTH (message) > 1)
|
|
|
1026 inform (input_location, "#pragma message: %s", TREE_STRING_POINTER (message));
|
|
|
1027 }
|
|
|
1028
|
|
|
1029 /* A vector of registered pragma callbacks. */
|
|
|
1030
|
|
|
1031 DEF_VEC_O (pragma_handler);
|
|
|
1032 DEF_VEC_ALLOC_O (pragma_handler, heap);
|
|
|
1033
|
|
|
1034 static VEC(pragma_handler, heap) *registered_pragmas;
|
|
|
1035
|
|
|
1036 typedef struct
|
|
|
1037 {
|
|
|
1038 const char *space;
|
|
|
1039 const char *name;
|
|
|
1040 } pragma_ns_name;
|
|
|
1041
|
|
|
1042 DEF_VEC_O (pragma_ns_name);
|
|
|
1043 DEF_VEC_ALLOC_O (pragma_ns_name, heap);
|
|
|
1044
|
|
|
1045 static VEC(pragma_ns_name, heap) *registered_pp_pragmas;
|
|
|
1046
|
|
|
1047 struct omp_pragma_def { const char *name; unsigned int id; };
|
|
|
1048 static const struct omp_pragma_def omp_pragmas[] = {
|
|
|
1049 { "atomic", PRAGMA_OMP_ATOMIC },
|
|
|
1050 { "barrier", PRAGMA_OMP_BARRIER },
|
|
|
1051 { "critical", PRAGMA_OMP_CRITICAL },
|
|
|
1052 { "flush", PRAGMA_OMP_FLUSH },
|
|
|
1053 { "for", PRAGMA_OMP_FOR },
|
|
|
1054 { "master", PRAGMA_OMP_MASTER },
|
|
|
1055 { "ordered", PRAGMA_OMP_ORDERED },
|
|
|
1056 { "parallel", PRAGMA_OMP_PARALLEL },
|
|
|
1057 { "section", PRAGMA_OMP_SECTION },
|
|
|
1058 { "sections", PRAGMA_OMP_SECTIONS },
|
|
|
1059 { "single", PRAGMA_OMP_SINGLE },
|
|
|
1060 { "task", PRAGMA_OMP_TASK },
|
|
|
1061 { "taskwait", PRAGMA_OMP_TASKWAIT },
|
|
|
1062 { "threadprivate", PRAGMA_OMP_THREADPRIVATE }
|
|
|
1063 };
|
|
|
1064
|
|
|
1065 void
|
|
|
1066 c_pp_lookup_pragma (unsigned int id, const char **space, const char **name)
|
|
|
1067 {
|
|
|
1068 const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
|
|
1069 int i;
|
|
|
1070
|
|
|
1071 for (i = 0; i < n_omp_pragmas; ++i)
|
|
|
1072 if (omp_pragmas[i].id == id)
|
|
|
1073 {
|
|
|
1074 *space = "omp";
|
|
|
1075 *name = omp_pragmas[i].name;
|
|
|
1076 return;
|
|
|
1077 }
|
|
|
1078
|
|
|
1079 if (id >= PRAGMA_FIRST_EXTERNAL
|
|
|
1080 && (id < PRAGMA_FIRST_EXTERNAL
|
|
|
1081 + VEC_length (pragma_ns_name, registered_pp_pragmas)))
|
|
|
1082 {
|
|
|
1083 *space = VEC_index (pragma_ns_name, registered_pp_pragmas,
|
|
|
1084 id - PRAGMA_FIRST_EXTERNAL)->space;
|
|
|
1085 *name = VEC_index (pragma_ns_name, registered_pp_pragmas,
|
|
|
1086 id - PRAGMA_FIRST_EXTERNAL)->name;
|
|
|
1087 return;
|
|
|
1088 }
|
|
|
1089
|
|
|
1090 gcc_unreachable ();
|
|
|
1091 }
|
|
|
1092
|
|
|
1093 /* Front-end wrappers for pragma registration to avoid dragging
|
|
|
1094 cpplib.h in almost everywhere. */
|
|
|
1095
|
|
|
1096 static void
|
|
|
1097 c_register_pragma_1 (const char *space, const char *name,
|
|
|
1098 pragma_handler handler, bool allow_expansion)
|
|
|
1099 {
|
|
|
1100 unsigned id;
|
|
|
1101
|
|
|
1102 if (flag_preprocess_only)
|
|
|
1103 {
|
|
|
1104 pragma_ns_name ns_name;
|
|
|
1105
|
|
|
1106 if (!allow_expansion)
|
|
|
1107 return;
|
|
|
1108
|
|
|
1109 ns_name.space = space;
|
|
|
1110 ns_name.name = name;
|
|
|
1111 VEC_safe_push (pragma_ns_name, heap, registered_pp_pragmas, &ns_name);
|
|
|
1112 id = VEC_length (pragma_ns_name, registered_pp_pragmas);
|
|
|
1113 id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
|
1114 }
|
|
|
1115 else
|
|
|
1116 {
|
|
|
1117 VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler);
|
|
|
1118 id = VEC_length (pragma_handler, registered_pragmas);
|
|
|
1119 id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
|
1120
|
|
|
1121 /* The C++ front end allocates 6 bits in cp_token; the C front end
|
|
|
1122 allocates 7 bits in c_token. At present this is sufficient. */
|
|
|
1123 gcc_assert (id < 64);
|
|
|
1124 }
|
|
|
1125
|
|
|
1126 cpp_register_deferred_pragma (parse_in, space, name, id,
|
|
|
1127 allow_expansion, false);
|
|
|
1128 }
|
|
|
1129
|
|
|
1130 void
|
|
|
1131 c_register_pragma (const char *space, const char *name, pragma_handler handler)
|
|
|
1132 {
|
|
|
1133 c_register_pragma_1 (space, name, handler, false);
|
|
|
1134 }
|
|
|
1135
|
|
|
1136 void
|
|
|
1137 c_register_pragma_with_expansion (const char *space, const char *name,
|
|
|
1138 pragma_handler handler)
|
|
|
1139 {
|
|
|
1140 c_register_pragma_1 (space, name, handler, true);
|
|
|
1141 }
|
|
|
1142
|
|
|
1143 void
|
|
|
1144 c_invoke_pragma_handler (unsigned int id)
|
|
|
1145 {
|
|
|
1146 pragma_handler handler;
|
|
|
1147
|
|
|
1148 id -= PRAGMA_FIRST_EXTERNAL;
|
|
|
1149 handler = *VEC_index (pragma_handler, registered_pragmas, id);
|
|
|
1150
|
|
|
1151 handler (parse_in);
|
|
|
1152 }
|
|
|
1153
|
|
|
1154 /* Set up front-end pragmas. */
|
|
|
1155 void
|
|
|
1156 init_pragma (void)
|
|
|
1157 {
|
|
|
1158 if (flag_openmp)
|
|
|
1159 {
|
|
|
1160 const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
|
|
1161 int i;
|
|
|
1162
|
|
|
1163 for (i = 0; i < n_omp_pragmas; ++i)
|
|
|
1164 cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name,
|
|
|
1165 omp_pragmas[i].id, true, true);
|
|
|
1166 }
|
|
|
1167
|
|
|
1168 if (!flag_preprocess_only)
|
|
|
1169 cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess",
|
|
|
1170 PRAGMA_GCC_PCH_PREPROCESS, false, false);
|
|
|
1171
|
|
|
1172 #ifdef HANDLE_PRAGMA_PACK
|
|
|
1173 #ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION
|
|
|
1174 c_register_pragma_with_expansion (0, "pack", handle_pragma_pack);
|
|
|
1175 #else
|
|
|
1176 c_register_pragma (0, "pack", handle_pragma_pack);
|
|
|
1177 #endif
|
|
|
1178 #endif
|
|
|
1179 #ifdef HANDLE_PRAGMA_WEAK
|
|
|
1180 c_register_pragma (0, "weak", handle_pragma_weak);
|
|
|
1181 #endif
|
|
|
1182 #ifdef HANDLE_PRAGMA_VISIBILITY
|
|
|
1183 c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
|
|
|
1184 #endif
|
|
|
1185
|
|
|
1186 c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic);
|
|
|
1187 c_register_pragma ("GCC", "target", handle_pragma_target);
|
|
|
1188 c_register_pragma ("GCC", "optimize", handle_pragma_optimize);
|
|
|
1189 c_register_pragma ("GCC", "push_options", handle_pragma_push_options);
|
|
|
1190 c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options);
|
|
|
1191 c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options);
|
|
|
1192
|
|
|
1193 c_register_pragma_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname);
|
|
|
1194 c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
|
|
|
1195
|
|
|
1196 c_register_pragma_with_expansion (0, "message", handle_pragma_message);
|
|
|
1197
|
|
|
1198 #ifdef REGISTER_TARGET_PRAGMAS
|
|
|
1199 REGISTER_TARGET_PRAGMAS ();
|
|
|
1200 #endif
|
|
|
1201 }
|
|
|
1202
|
|
|
1203 #include "gt-c-pragma.h"
|
