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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 struct def_pragma_macro_value GTY(())
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248 {
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249 struct def_pragma_macro_value *prev;
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250 cpp_macro *value;
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251 };
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252
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253 struct def_pragma_macro GTY(())
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254 {
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255 hashval_t hash;
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256 const char *name;
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257 struct def_pragma_macro_value value;
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258 };
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259
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260 static GTY((param_is (struct def_pragma_macro))) htab_t pushed_macro_table;
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261
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262 #ifdef HANDLE_PRAGMA_PUSH_POP_MACRO
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263 /* Hash table control functions for pushed_macro_table. */
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264 static hashval_t
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265 dpm_hash (const void *p)
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266 {
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267 return ((const struct def_pragma_macro *)p)->hash;
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268 }
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269
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270 static int
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271 dpm_eq (const void *pa, const void *pb)
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272 {
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273 const struct def_pragma_macro *const a = (const struct def_pragma_macro *) pa,
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274 *const b = (const struct def_pragma_macro *) pb;
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275 return a->hash == b->hash && strcmp (a->name, b->name) == 0;
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276 }
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277
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278 /* #pragma push_macro("MACRO_NAME")
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279 #pragma pop_macro("MACRO_NAME") */
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280
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281 static void
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282 handle_pragma_push_macro (cpp_reader *reader)
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283 {
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284 tree x, id = 0;
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285 enum cpp_ttype token;
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286 struct def_pragma_macro dummy, *c;
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287 const char *macroname;
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288 void **slot;
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289
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290 if (pragma_lex (&x) != CPP_OPEN_PAREN)
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291 GCC_BAD ("missing %<(%> after %<#pragma push_macro%> - ignored");
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292
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293 token = pragma_lex (&id);
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294
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295 /* Silently ignore */
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296 if (token == CPP_CLOSE_PAREN)
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297 return;
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298 if (token != CPP_STRING)
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299 GCC_BAD ("invalid constant in %<#pragma push_macro%> - ignored");
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300
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301 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
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302 GCC_BAD ("missing %<)%> after %<#pragma push_macro%> - ignored");
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303
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304 if (pragma_lex (&x) != CPP_EOF)
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305 warning (OPT_Wpragmas, "junk at end of %<#pragma push_macro%>");
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306
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307 /* Check for empty string, and silently ignore. */
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308 if (TREE_STRING_LENGTH (id) < 1)
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309 return;
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310 macroname = TREE_STRING_POINTER (id);
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311
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312 if (pushed_macro_table == NULL)
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313 pushed_macro_table = htab_create_ggc (15, dpm_hash, dpm_eq, 0);
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314
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315 dummy.hash = htab_hash_string (macroname);
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316 dummy.name = macroname;
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317 slot = htab_find_slot_with_hash (pushed_macro_table, &dummy,
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318 dummy.hash, INSERT);
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319 c = (struct def_pragma_macro *) *slot;
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320 if (c == NULL)
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321 {
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322 *slot = c = GGC_NEW (struct def_pragma_macro);
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323 c->hash = dummy.hash;
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324 c->name = ggc_alloc_string (macroname, TREE_STRING_LENGTH (id) - 1);
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325 c->value.prev = NULL;
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326 }
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327 else
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328 {
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329 struct def_pragma_macro_value *v;
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330 v = GGC_NEW (struct def_pragma_macro_value);
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331 *v = c->value;
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332 c->value.prev = v;
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333 }
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334
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335 c->value.value = cpp_push_definition (reader, macroname);
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336 }
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337
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338 static void
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339 handle_pragma_pop_macro (cpp_reader *reader)
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340 {
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341 tree x, id = 0;
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342 enum cpp_ttype token;
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343 struct def_pragma_macro dummy, *c;
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344 const char *macroname;
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345 void **slot = NULL;
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346
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347 if (pragma_lex (&x) != CPP_OPEN_PAREN)
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348 GCC_BAD ("missing %<(%> after %<#pragma pop_macro%> - ignored");
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349
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350 token = pragma_lex (&id);
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351
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352 /* Silently ignore */
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353 if (token == CPP_CLOSE_PAREN)
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354 return;
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355 if (token != CPP_STRING)
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356 GCC_BAD ("invalid constant in %<#pragma pop_macro%> - ignored");
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357
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358 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
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359 GCC_BAD ("missing %<)%> after %<#pragma pop_macro%> - ignored");
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360
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361 if (pragma_lex (&x) != CPP_EOF)
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362 warning (OPT_Wpragmas, "junk at end of %<#pragma pop_macro%>");
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363
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364 /* Check for empty string, and silently ignore. */
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365 if (TREE_STRING_LENGTH (id) < 1)
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366 return;
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367 macroname = TREE_STRING_POINTER (id);
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368
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369 dummy.hash = htab_hash_string (macroname);
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370 dummy.name = macroname;
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371 if (pushed_macro_table)
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372 slot = htab_find_slot_with_hash (pushed_macro_table, &dummy,
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373 dummy.hash, NO_INSERT);
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374 if (slot == NULL)
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375 return;
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376 c = (struct def_pragma_macro *) *slot;
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377
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378 cpp_pop_definition (reader, c->name, c->value.value);
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379
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380 if (c->value.prev)
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381 c->value = *c->value.prev;
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382 else
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383 htab_clear_slot (pushed_macro_table, slot);
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384 }
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385 #endif /* HANDLE_PRAGMA_PUSH_POP_MACRO */
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386
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387 static GTY(()) tree pending_weaks;
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388
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389 #ifdef HANDLE_PRAGMA_WEAK
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390 static void apply_pragma_weak (tree, tree);
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391 static void handle_pragma_weak (cpp_reader *);
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392
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393 static void
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394 apply_pragma_weak (tree decl, tree value)
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395 {
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396 if (value)
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397 {
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398 value = build_string (IDENTIFIER_LENGTH (value),
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399 IDENTIFIER_POINTER (value));
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400 decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
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401 build_tree_list (NULL, value)),
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402 0);
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403 }
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404
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405 if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
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406 && !DECL_WEAK (decl) /* Don't complain about a redundant #pragma. */
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|
|
407 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
|
|
|
408 warning (OPT_Wpragmas, "applying #pragma weak %q+D after first use "
|
|
|
409 "results in unspecified behavior", decl);
|
|
|
410
|
|
|
411 declare_weak (decl);
|
|
|
412 }
|
|
|
413
|
|
|
414 void
|
|
|
415 maybe_apply_pragma_weak (tree decl)
|
|
|
416 {
|
|
|
417 tree *p, t, id;
|
|
|
418
|
|
|
419 /* Avoid asking for DECL_ASSEMBLER_NAME when it's not needed. */
|
|
|
420
|
|
|
421 /* No weak symbols pending, take the short-cut. */
|
|
|
422 if (!pending_weaks)
|
|
|
423 return;
|
|
|
424 /* If it's not visible outside this file, it doesn't matter whether
|
|
|
425 it's weak. */
|
|
|
426 if (!DECL_EXTERNAL (decl) && !TREE_PUBLIC (decl))
|
|
|
427 return;
|
|
|
428 /* If it's not a function or a variable, it can't be weak.
|
|
|
429 FIXME: what kinds of things are visible outside this file but
|
|
|
430 aren't functions or variables? Should this be an assert instead? */
|
|
|
431 if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
|
|
432 return;
|
|
|
433
|
|
|
434 id = DECL_ASSEMBLER_NAME (decl);
|
|
|
435
|
|
|
436 for (p = &pending_weaks; (t = *p) ; p = &TREE_CHAIN (t))
|
|
|
437 if (id == TREE_PURPOSE (t))
|
|
|
438 {
|
|
|
439 apply_pragma_weak (decl, TREE_VALUE (t));
|
|
|
440 *p = TREE_CHAIN (t);
|
|
|
441 break;
|
|
|
442 }
|
|
|
443 }
|
|
|
444
|
|
|
445 /* Process all "#pragma weak A = B" directives where we have not seen
|
|
|
446 a decl for A. */
|
|
|
447 void
|
|
|
448 maybe_apply_pending_pragma_weaks (void)
|
|
|
449 {
|
|
|
450 tree *p, t, alias_id, id, decl, *next;
|
|
|
451
|
|
|
452 for (p = &pending_weaks; (t = *p) ; p = next)
|
|
|
453 {
|
|
|
454 next = &TREE_CHAIN (t);
|
|
|
455 alias_id = TREE_PURPOSE (t);
|
|
|
456 id = TREE_VALUE (t);
|
|
|
457
|
|
|
458 if (TREE_VALUE (t) == NULL)
|
|
|
459 continue;
|
|
|
460
|
|
|
461 decl = build_decl (FUNCTION_DECL, alias_id, default_function_type);
|
|
|
462
|
|
|
463 DECL_ARTIFICIAL (decl) = 1;
|
|
|
464 TREE_PUBLIC (decl) = 1;
|
|
|
465 DECL_EXTERNAL (decl) = 1;
|
|
|
466 DECL_WEAK (decl) = 1;
|
|
|
467
|
|
|
468 assemble_alias (decl, id);
|
|
|
469 }
|
|
|
470 }
|
|
|
471
|
|
|
472 /* #pragma weak name [= value] */
|
|
|
473 static void
|
|
|
474 handle_pragma_weak (cpp_reader * ARG_UNUSED (dummy))
|
|
|
475 {
|
|
|
476 tree name, value, x, decl;
|
|
|
477 enum cpp_ttype t;
|
|
|
478
|
|
|
479 value = 0;
|
|
|
480
|
|
|
481 if (pragma_lex (&name) != CPP_NAME)
|
|
|
482 GCC_BAD ("malformed #pragma weak, ignored");
|
|
|
483 t = pragma_lex (&x);
|
|
|
484 if (t == CPP_EQ)
|
|
|
485 {
|
|
|
486 if (pragma_lex (&value) != CPP_NAME)
|
|
|
487 GCC_BAD ("malformed #pragma weak, ignored");
|
|
|
488 t = pragma_lex (&x);
|
|
|
489 }
|
|
|
490 if (t != CPP_EOF)
|
|
|
491 warning (OPT_Wpragmas, "junk at end of %<#pragma weak%>");
|
|
|
492
|
|
|
493 decl = identifier_global_value (name);
|
|
|
494 if (decl && DECL_P (decl))
|
|
|
495 {
|
|
|
496 apply_pragma_weak (decl, value);
|
|
|
497 if (value)
|
|
|
498 assemble_alias (decl, value);
|
|
|
499 }
|
|
|
500 else
|
|
|
501 pending_weaks = tree_cons (name, value, pending_weaks);
|
|
|
502 }
|
|
|
503 #else
|
|
|
504 void
|
|
|
505 maybe_apply_pragma_weak (tree ARG_UNUSED (decl))
|
|
|
506 {
|
|
|
507 }
|
|
|
508
|
|
|
509 void
|
|
|
510 maybe_apply_pending_pragma_weaks (void)
|
|
|
511 {
|
|
|
512 }
|
|
|
513 #endif /* HANDLE_PRAGMA_WEAK */
|
|
|
514
|
|
|
515 /* GCC supports two #pragma directives for renaming the external
|
|
|
516 symbol associated with a declaration (DECL_ASSEMBLER_NAME), for
|
|
|
517 compatibility with the Solaris and Tru64 system headers. GCC also
|
|
|
518 has its own notation for this, __asm__("name") annotations.
|
|
|
519
|
|
|
520 Corner cases of these features and their interaction:
|
|
|
521
|
|
|
522 1) Both pragmas silently apply only to declarations with external
|
|
|
523 linkage (that is, TREE_PUBLIC || DECL_EXTERNAL). Asm labels
|
|
|
524 do not have this restriction.
|
|
|
525
|
|
|
526 2) In C++, both #pragmas silently apply only to extern "C" declarations.
|
|
|
527 Asm labels do not have this restriction.
|
|
|
528
|
|
|
529 3) If any of the three ways of changing DECL_ASSEMBLER_NAME is
|
|
|
530 applied to a decl whose DECL_ASSEMBLER_NAME is already set, and the
|
|
|
531 new name is different, a warning issues and the name does not change.
|
|
|
532
|
|
|
533 4) The "source name" for #pragma redefine_extname is the DECL_NAME,
|
|
|
534 *not* the DECL_ASSEMBLER_NAME.
|
|
|
535
|
|
|
536 5) If #pragma extern_prefix is in effect and a declaration occurs
|
|
|
537 with an __asm__ name, the #pragma extern_prefix is silently
|
|
|
538 ignored for that declaration.
|
|
|
539
|
|
|
540 6) If #pragma extern_prefix and #pragma redefine_extname apply to
|
|
|
541 the same declaration, whichever triggered first wins, and a warning
|
|
|
542 is issued. (We would like to have #pragma redefine_extname always
|
|
|
543 win, but it can appear either before or after the declaration, and
|
|
|
544 if it appears afterward, we have no way of knowing whether a modified
|
|
|
545 DECL_ASSEMBLER_NAME is due to #pragma extern_prefix.) */
|
|
|
546
|
|
|
547 static GTY(()) tree pending_redefine_extname;
|
|
|
548
|
|
|
549 static void handle_pragma_redefine_extname (cpp_reader *);
|
|
|
550
|
|
|
551 /* #pragma redefine_extname oldname newname */
|
|
|
552 static void
|
|
|
553 handle_pragma_redefine_extname (cpp_reader * ARG_UNUSED (dummy))
|
|
|
554 {
|
|
|
555 tree oldname, newname, decl, x;
|
|
|
556 enum cpp_ttype t;
|
|
|
557
|
|
|
558 if (pragma_lex (&oldname) != CPP_NAME)
|
|
|
559 GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
|
|
560 if (pragma_lex (&newname) != CPP_NAME)
|
|
|
561 GCC_BAD ("malformed #pragma redefine_extname, ignored");
|
|
|
562 t = pragma_lex (&x);
|
|
|
563 if (t != CPP_EOF)
|
|
|
564 warning (OPT_Wpragmas, "junk at end of %<#pragma redefine_extname%>");
|
|
|
565
|
|
|
566 if (!flag_mudflap && !targetm.handle_pragma_redefine_extname)
|
|
|
567 {
|
|
|
568 if (warn_unknown_pragmas > in_system_header)
|
|
|
569 warning (OPT_Wunknown_pragmas,
|
|
|
570 "#pragma redefine_extname not supported on this target");
|
|
|
571 return;
|
|
|
572 }
|
|
|
573
|
|
|
574 decl = identifier_global_value (oldname);
|
|
|
575 if (decl
|
|
|
576 && (TREE_PUBLIC (decl) || DECL_EXTERNAL (decl))
|
|
|
577 && (TREE_CODE (decl) == FUNCTION_DECL
|
|
|
578 || TREE_CODE (decl) == VAR_DECL)
|
|
|
579 && has_c_linkage (decl))
|
|
|
580 {
|
|
|
581 if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
|
|
582 {
|
|
|
583 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
|
584 name = targetm.strip_name_encoding (name);
|
|
|
585
|
|
|
586 if (strcmp (name, IDENTIFIER_POINTER (newname)))
|
|
|
587 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
588 "conflict with previous rename");
|
|
|
589 }
|
|
|
590 else
|
|
|
591 change_decl_assembler_name (decl, newname);
|
|
|
592 }
|
|
|
593 else
|
|
|
594 /* We have to add this to the rename list even if there's already
|
|
|
595 a global value that doesn't meet the above criteria, because in
|
|
|
596 C++ "struct foo {...};" puts "foo" in the current namespace but
|
|
|
597 does *not* conflict with a subsequent declaration of a function
|
|
|
598 or variable foo. See g++.dg/other/pragma-re-2.C. */
|
|
|
599 add_to_renaming_pragma_list (oldname, newname);
|
|
|
600 }
|
|
|
601
|
|
|
602 /* This is called from here and from ia64.c. */
|
|
|
603 void
|
|
|
604 add_to_renaming_pragma_list (tree oldname, tree newname)
|
|
|
605 {
|
|
|
606 tree previous = purpose_member (oldname, pending_redefine_extname);
|
|
|
607 if (previous)
|
|
|
608 {
|
|
|
609 if (TREE_VALUE (previous) != newname)
|
|
|
610 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
611 "conflict with previous #pragma redefine_extname");
|
|
|
612 return;
|
|
|
613 }
|
|
|
614
|
|
|
615 pending_redefine_extname
|
|
|
616 = tree_cons (oldname, newname, pending_redefine_extname);
|
|
|
617 }
|
|
|
618
|
|
|
619 static GTY(()) tree pragma_extern_prefix;
|
|
|
620
|
|
|
621 /* #pragma extern_prefix "prefix" */
|
|
|
622 static void
|
|
|
623 handle_pragma_extern_prefix (cpp_reader * ARG_UNUSED (dummy))
|
|
|
624 {
|
|
|
625 tree prefix, x;
|
|
|
626 enum cpp_ttype t;
|
|
|
627
|
|
|
628 if (pragma_lex (&prefix) != CPP_STRING)
|
|
|
629 GCC_BAD ("malformed #pragma extern_prefix, ignored");
|
|
|
630 t = pragma_lex (&x);
|
|
|
631 if (t != CPP_EOF)
|
|
|
632 warning (OPT_Wpragmas, "junk at end of %<#pragma extern_prefix%>");
|
|
|
633
|
|
|
634 if (targetm.handle_pragma_extern_prefix)
|
|
|
635 /* Note that the length includes the null terminator. */
|
|
|
636 pragma_extern_prefix = (TREE_STRING_LENGTH (prefix) > 1 ? prefix : NULL);
|
|
|
637 else if (warn_unknown_pragmas > in_system_header)
|
|
|
638 warning (OPT_Wunknown_pragmas,
|
|
|
639 "#pragma extern_prefix not supported on this target");
|
|
|
640 }
|
|
|
641
|
|
|
642 /* Hook from the front ends to apply the results of one of the preceding
|
|
|
643 pragmas that rename variables. */
|
|
|
644
|
|
|
645 tree
|
|
|
646 maybe_apply_renaming_pragma (tree decl, tree asmname)
|
|
|
647 {
|
|
|
648 tree *p, t;
|
|
|
649
|
|
|
650 /* The renaming pragmas are only applied to declarations with
|
|
|
651 external linkage. */
|
|
|
652 if ((TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL)
|
|
|
653 || (!TREE_PUBLIC (decl) && !DECL_EXTERNAL (decl))
|
|
|
654 || !has_c_linkage (decl))
|
|
|
655 return asmname;
|
|
|
656
|
|
|
657 /* If the DECL_ASSEMBLER_NAME is already set, it does not change,
|
|
|
658 but we may warn about a rename that conflicts. */
|
|
|
659 if (DECL_ASSEMBLER_NAME_SET_P (decl))
|
|
|
660 {
|
|
|
661 const char *oldname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
|
662 oldname = targetm.strip_name_encoding (oldname);
|
|
|
663
|
|
|
664 if (asmname && strcmp (TREE_STRING_POINTER (asmname), oldname))
|
|
|
665 warning (OPT_Wpragmas, "asm declaration ignored due to "
|
|
|
666 "conflict with previous rename");
|
|
|
667
|
|
|
668 /* Take any pending redefine_extname off the list. */
|
|
|
669 for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
|
|
670 if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
|
|
671 {
|
|
|
672 /* Only warn if there is a conflict. */
|
|
|
673 if (strcmp (IDENTIFIER_POINTER (TREE_VALUE (t)), oldname))
|
|
|
674 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
675 "conflict with previous rename");
|
|
|
676
|
|
|
677 *p = TREE_CHAIN (t);
|
|
|
678 break;
|
|
|
679 }
|
|
|
680 return 0;
|
|
|
681 }
|
|
|
682
|
|
|
683 /* Find out if we have a pending #pragma redefine_extname. */
|
|
|
684 for (p = &pending_redefine_extname; (t = *p); p = &TREE_CHAIN (t))
|
|
|
685 if (DECL_NAME (decl) == TREE_PURPOSE (t))
|
|
|
686 {
|
|
|
687 tree newname = TREE_VALUE (t);
|
|
|
688 *p = TREE_CHAIN (t);
|
|
|
689
|
|
|
690 /* If we already have an asmname, #pragma redefine_extname is
|
|
|
691 ignored (with a warning if it conflicts). */
|
|
|
692 if (asmname)
|
|
|
693 {
|
|
|
694 if (strcmp (TREE_STRING_POINTER (asmname),
|
|
|
695 IDENTIFIER_POINTER (newname)) != 0)
|
|
|
696 warning (OPT_Wpragmas, "#pragma redefine_extname ignored due to "
|
|
|
697 "conflict with __asm__ declaration");
|
|
|
698 return asmname;
|
|
|
699 }
|
|
|
700
|
|
|
701 /* Otherwise we use what we've got; #pragma extern_prefix is
|
|
|
702 silently ignored. */
|
|
|
703 return build_string (IDENTIFIER_LENGTH (newname),
|
|
|
704 IDENTIFIER_POINTER (newname));
|
|
|
705 }
|
|
|
706
|
|
|
707 /* If we've got an asmname, #pragma extern_prefix is silently ignored. */
|
|
|
708 if (asmname)
|
|
|
709 return asmname;
|
|
|
710
|
|
|
711 /* If #pragma extern_prefix is in effect, apply it. */
|
|
|
712 if (pragma_extern_prefix)
|
|
|
713 {
|
|
|
714 const char *prefix = TREE_STRING_POINTER (pragma_extern_prefix);
|
|
|
715 size_t plen = TREE_STRING_LENGTH (pragma_extern_prefix) - 1;
|
|
|
716
|
|
|
717 const char *id = IDENTIFIER_POINTER (DECL_NAME (decl));
|
|
|
718 size_t ilen = IDENTIFIER_LENGTH (DECL_NAME (decl));
|
|
|
719
|
|
|
720 char *newname = (char *) alloca (plen + ilen + 1);
|
|
|
721
|
|
|
722 memcpy (newname, prefix, plen);
|
|
|
723 memcpy (newname + plen, id, ilen + 1);
|
|
|
724
|
|
|
725 return build_string (plen + ilen, newname);
|
|
|
726 }
|
|
|
727
|
|
|
728 /* Nada. */
|
|
|
729 return 0;
|
|
|
730 }
|
|
|
731
|
|
|
732
|
|
|
733 #ifdef HANDLE_PRAGMA_VISIBILITY
|
|
|
734 static void handle_pragma_visibility (cpp_reader *);
|
|
|
735
|
|
|
736 typedef enum symbol_visibility visibility;
|
|
|
737 DEF_VEC_I (visibility);
|
|
|
738 DEF_VEC_ALLOC_I (visibility, heap);
|
|
|
739 static VEC (visibility, heap) *visstack;
|
|
|
740
|
|
|
741 /* Push the visibility indicated by STR onto the top of the #pragma
|
|
|
742 visibility stack. */
|
|
|
743
|
|
|
744 void
|
|
|
745 push_visibility (const char *str)
|
|
|
746 {
|
|
|
747 VEC_safe_push (visibility, heap, visstack,
|
|
|
748 default_visibility);
|
|
|
749 if (!strcmp (str, "default"))
|
|
|
750 default_visibility = VISIBILITY_DEFAULT;
|
|
|
751 else if (!strcmp (str, "internal"))
|
|
|
752 default_visibility = VISIBILITY_INTERNAL;
|
|
|
753 else if (!strcmp (str, "hidden"))
|
|
|
754 default_visibility = VISIBILITY_HIDDEN;
|
|
|
755 else if (!strcmp (str, "protected"))
|
|
|
756 default_visibility = VISIBILITY_PROTECTED;
|
|
|
757 else
|
|
|
758 GCC_BAD ("#pragma GCC visibility push() must specify default, internal, hidden or protected");
|
|
|
759 visibility_options.inpragma = 1;
|
|
|
760 }
|
|
|
761
|
|
|
762 /* Pop a level of the #pragma visibility stack. */
|
|
|
763
|
|
|
764 void
|
|
|
765 pop_visibility (void)
|
|
|
766 {
|
|
|
767 default_visibility = VEC_pop (visibility, visstack);
|
|
|
768 visibility_options.inpragma
|
|
|
769 = VEC_length (visibility, visstack) != 0;
|
|
|
770 }
|
|
|
771
|
|
|
772 /* Sets the default visibility for symbols to something other than that
|
|
|
773 specified on the command line. */
|
|
|
774
|
|
|
775 static void
|
|
|
776 handle_pragma_visibility (cpp_reader *dummy ATTRIBUTE_UNUSED)
|
|
|
777 {
|
|
|
778 /* Form is #pragma GCC visibility push(hidden)|pop */
|
|
|
779 tree x;
|
|
|
780 enum cpp_ttype token;
|
|
|
781 enum { bad, push, pop } action = bad;
|
|
|
782
|
|
|
783 token = pragma_lex (&x);
|
|
|
784 if (token == CPP_NAME)
|
|
|
785 {
|
|
|
786 const char *op = IDENTIFIER_POINTER (x);
|
|
|
787 if (!strcmp (op, "push"))
|
|
|
788 action = push;
|
|
|
789 else if (!strcmp (op, "pop"))
|
|
|
790 action = pop;
|
|
|
791 }
|
|
|
792 if (bad == action)
|
|
|
793 GCC_BAD ("#pragma GCC visibility must be followed by push or pop");
|
|
|
794 else
|
|
|
795 {
|
|
|
796 if (pop == action)
|
|
|
797 {
|
|
|
798 if (!VEC_length (visibility, visstack))
|
|
|
799 GCC_BAD ("no matching push for %<#pragma GCC visibility pop%>");
|
|
|
800 else
|
|
|
801 pop_visibility ();
|
|
|
802 }
|
|
|
803 else
|
|
|
804 {
|
|
|
805 if (pragma_lex (&x) != CPP_OPEN_PAREN)
|
|
|
806 GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
|
|
807 token = pragma_lex (&x);
|
|
|
808 if (token != CPP_NAME)
|
|
|
809 GCC_BAD ("malformed #pragma GCC visibility push");
|
|
|
810 else
|
|
|
811 push_visibility (IDENTIFIER_POINTER (x));
|
|
|
812 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
|
|
813 GCC_BAD ("missing %<(%> after %<#pragma GCC visibility push%> - ignored");
|
|
|
814 }
|
|
|
815 }
|
|
|
816 if (pragma_lex (&x) != CPP_EOF)
|
|
|
817 warning (OPT_Wpragmas, "junk at end of %<#pragma GCC visibility%>");
|
|
|
818 }
|
|
|
819
|
|
|
820 #endif
|
|
|
821
|
|
|
822 static void
|
|
|
823 handle_pragma_diagnostic(cpp_reader *ARG_UNUSED(dummy))
|
|
|
824 {
|
|
|
825 const char *kind_string, *option_string;
|
|
|
826 unsigned int option_index;
|
|
|
827 enum cpp_ttype token;
|
|
|
828 diagnostic_t kind;
|
|
|
829 tree x;
|
|
|
830
|
|
|
831 if (cfun)
|
|
|
832 {
|
|
|
833 error ("#pragma GCC diagnostic not allowed inside functions");
|
|
|
834 return;
|
|
|
835 }
|
|
|
836
|
|
|
837 token = pragma_lex (&x);
|
|
|
838 if (token != CPP_NAME)
|
|
|
839 GCC_BAD ("missing [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
|
|
840 kind_string = IDENTIFIER_POINTER (x);
|
|
|
841 if (strcmp (kind_string, "error") == 0)
|
|
|
842 kind = DK_ERROR;
|
|
|
843 else if (strcmp (kind_string, "warning") == 0)
|
|
|
844 kind = DK_WARNING;
|
|
|
845 else if (strcmp (kind_string, "ignored") == 0)
|
|
|
846 kind = DK_IGNORED;
|
|
|
847 else
|
|
|
848 GCC_BAD ("expected [error|warning|ignored] after %<#pragma GCC diagnostic%>");
|
|
|
849
|
|
|
850 token = pragma_lex (&x);
|
|
|
851 if (token != CPP_STRING)
|
|
|
852 GCC_BAD ("missing option after %<#pragma GCC diagnostic%> kind");
|
|
|
853 option_string = TREE_STRING_POINTER (x);
|
|
|
854 for (option_index = 0; option_index < cl_options_count; option_index++)
|
|
|
855 if (strcmp (cl_options[option_index].opt_text, option_string) == 0)
|
|
|
856 {
|
|
|
857 /* This overrides -Werror, for example. */
|
|
|
858 diagnostic_classify_diagnostic (global_dc, option_index, kind);
|
|
|
859 /* This makes sure the option is enabled, like -Wfoo would do. */
|
|
|
860 if (cl_options[option_index].var_type == CLVC_BOOLEAN
|
|
|
861 && cl_options[option_index].flag_var
|
|
|
862 && kind != DK_IGNORED)
|
|
|
863 *(int *) cl_options[option_index].flag_var = 1;
|
|
|
864 return;
|
|
|
865 }
|
|
|
866 GCC_BAD ("unknown option after %<#pragma GCC diagnostic%> kind");
|
|
|
867 }
|
|
|
868
|
|
|
869 /* Parse #pragma GCC target (xxx) to set target specific options. */
|
|
|
870 static void
|
|
|
871 handle_pragma_target(cpp_reader *ARG_UNUSED(dummy))
|
|
|
872 {
|
|
|
873 enum cpp_ttype token;
|
|
|
874 tree x;
|
|
|
875 bool close_paren_needed_p = false;
|
|
|
876
|
|
|
877 if (cfun)
|
|
|
878 {
|
|
|
879 error ("#pragma GCC option is not allowed inside functions");
|
|
|
880 return;
|
|
|
881 }
|
|
|
882
|
|
|
883 token = pragma_lex (&x);
|
|
|
884 if (token == CPP_OPEN_PAREN)
|
|
|
885 {
|
|
|
886 close_paren_needed_p = true;
|
|
|
887 token = pragma_lex (&x);
|
|
|
888 }
|
|
|
889
|
|
|
890 if (token != CPP_STRING)
|
|
|
891 {
|
|
|
892 GCC_BAD ("%<#pragma GCC option%> is not a string");
|
|
|
893 return;
|
|
|
894 }
|
|
|
895
|
|
|
896 /* Strings are user options. */
|
|
|
897 else
|
|
|
898 {
|
|
|
899 tree args = NULL_TREE;
|
|
|
900
|
|
|
901 do
|
|
|
902 {
|
|
|
903 /* Build up the strings now as a tree linked list. Skip empty
|
|
|
904 strings. */
|
|
|
905 if (TREE_STRING_LENGTH (x) > 0)
|
|
|
906 args = tree_cons (NULL_TREE, x, args);
|
|
|
907
|
|
|
908 token = pragma_lex (&x);
|
|
|
909 while (token == CPP_COMMA)
|
|
|
910 token = pragma_lex (&x);
|
|
|
911 }
|
|
|
912 while (token == CPP_STRING);
|
|
|
913
|
|
|
914 if (close_paren_needed_p)
|
|
|
915 {
|
|
|
916 if (token == CPP_CLOSE_PAREN)
|
|
|
917 token = pragma_lex (&x);
|
|
|
918 else
|
|
|
919 GCC_BAD ("%<#pragma GCC target (string [,string]...)%> does "
|
|
|
920 "not have a final %<)%>.");
|
|
|
921 }
|
|
|
922
|
|
|
923 if (token != CPP_EOF)
|
|
|
924 {
|
|
|
925 error ("#pragma GCC target string... is badly formed");
|
|
|
926 return;
|
|
|
927 }
|
|
|
928
|
|
|
929 /* put arguments in the order the user typed them. */
|
|
|
930 args = nreverse (args);
|
|
|
931
|
|
|
932 if (targetm.target_option.pragma_parse (args, NULL_TREE))
|
|
|
933 current_target_pragma = args;
|
|
|
934 }
|
|
|
935 }
|
|
|
936
|
|
|
937 /* Handle #pragma GCC optimize to set optimization options. */
|
|
|
938 static void
|
|
|
939 handle_pragma_optimize (cpp_reader *ARG_UNUSED(dummy))
|
|
|
940 {
|
|
|
941 enum cpp_ttype token;
|
|
|
942 tree x;
|
|
|
943 bool close_paren_needed_p = false;
|
|
|
944 tree optimization_previous_node = optimization_current_node;
|
|
|
945
|
|
|
946 if (cfun)
|
|
|
947 {
|
|
|
948 error ("#pragma GCC optimize is not allowed inside functions");
|
|
|
949 return;
|
|
|
950 }
|
|
|
951
|
|
|
952 token = pragma_lex (&x);
|
|
|
953 if (token == CPP_OPEN_PAREN)
|
|
|
954 {
|
|
|
955 close_paren_needed_p = true;
|
|
|
956 token = pragma_lex (&x);
|
|
|
957 }
|
|
|
958
|
|
|
959 if (token != CPP_STRING && token != CPP_NUMBER)
|
|
|
960 {
|
|
|
961 GCC_BAD ("%<#pragma GCC optimize%> is not a string or number");
|
|
|
962 return;
|
|
|
963 }
|
|
|
964
|
|
|
965 /* Strings/numbers are user options. */
|
|
|
966 else
|
|
|
967 {
|
|
|
968 tree args = NULL_TREE;
|
|
|
969
|
|
|
970 do
|
|
|
971 {
|
|
|
972 /* Build up the numbers/strings now as a list. */
|
|
|
973 if (token != CPP_STRING || TREE_STRING_LENGTH (x) > 0)
|
|
|
974 args = tree_cons (NULL_TREE, x, args);
|
|
|
975
|
|
|
976 token = pragma_lex (&x);
|
|
|
977 while (token == CPP_COMMA)
|
|
|
978 token = pragma_lex (&x);
|
|
|
979 }
|
|
|
980 while (token == CPP_STRING || token == CPP_NUMBER);
|
|
|
981
|
|
|
982 if (close_paren_needed_p)
|
|
|
983 {
|
|
|
984 if (token == CPP_CLOSE_PAREN)
|
|
|
985 token = pragma_lex (&x);
|
|
|
986 else
|
|
|
987 GCC_BAD ("%<#pragma GCC optimize (string [,string]...)%> does "
|
|
|
988 "not have a final %<)%>.");
|
|
|
989 }
|
|
|
990
|
|
|
991 if (token != CPP_EOF)
|
|
|
992 {
|
|
|
993 error ("#pragma GCC optimize string... is badly formed");
|
|
|
994 return;
|
|
|
995 }
|
|
|
996
|
|
|
997 /* put arguments in the order the user typed them. */
|
|
|
998 args = nreverse (args);
|
|
|
999
|
|
|
1000 parse_optimize_options (args, false);
|
|
|
1001 current_optimize_pragma = chainon (current_optimize_pragma, args);
|
|
|
1002 optimization_current_node = build_optimization_node ();
|
|
|
1003 c_cpp_builtins_optimize_pragma (parse_in,
|
|
|
1004 optimization_previous_node,
|
|
|
1005 optimization_current_node);
|
|
|
1006 }
|
|
|
1007 }
|
|
|
1008
|
|
|
1009 /* Stack of the #pragma GCC options created with #pragma GCC push_option. Save
|
|
|
1010 both the binary representation of the options and the TREE_LIST of
|
|
|
1011 strings that will be added to the function's attribute list. */
|
|
|
1012 typedef struct opt_stack GTY(())
|
|
|
1013 {
|
|
|
1014 struct opt_stack *prev;
|
|
|
1015 tree target_binary;
|
|
|
1016 tree target_strings;
|
|
|
1017 tree optimize_binary;
|
|
|
1018 tree optimize_strings;
|
|
|
1019 } opt_stack;
|
|
|
1020
|
|
|
1021 static GTY(()) struct opt_stack * options_stack;
|
|
|
1022
|
|
|
1023 /* Handle #pragma GCC push_options to save the current target and optimization
|
|
|
1024 options. */
|
|
|
1025
|
|
|
1026 static void
|
|
|
1027 handle_pragma_push_options (cpp_reader *ARG_UNUSED(dummy))
|
|
|
1028 {
|
|
|
1029 enum cpp_ttype token;
|
|
|
1030 tree x = 0;
|
|
|
1031 opt_stack *p;
|
|
|
1032
|
|
|
1033 token = pragma_lex (&x);
|
|
|
1034 if (token != CPP_EOF)
|
|
|
1035 {
|
|
|
1036 warning (OPT_Wpragmas, "junk at end of %<#pragma push_options%>");
|
|
|
1037 return;
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 p = GGC_NEW (opt_stack);
|
|
|
1041 p->prev = options_stack;
|
|
|
1042 options_stack = p;
|
|
|
1043
|
|
|
1044 /* Save optimization and target flags in binary format. */
|
|
|
1045 p->optimize_binary = build_optimization_node ();
|
|
|
1046 p->target_binary = build_target_option_node ();
|
|
|
1047
|
|
|
1048 /* Save optimization and target flags in string list format. */
|
|
|
1049 p->optimize_strings = copy_list (current_optimize_pragma);
|
|
|
1050 p->target_strings = copy_list (current_target_pragma);
|
|
|
1051 }
|
|
|
1052
|
|
|
1053 /* Handle #pragma GCC pop_options to restore the current target and
|
|
|
1054 optimization options from a previous push_options. */
|
|
|
1055
|
|
|
1056 static void
|
|
|
1057 handle_pragma_pop_options (cpp_reader *ARG_UNUSED(dummy))
|
|
|
1058 {
|
|
|
1059 enum cpp_ttype token;
|
|
|
1060 tree x = 0;
|
|
|
1061 opt_stack *p;
|
|
|
1062
|
|
|
1063 token = pragma_lex (&x);
|
|
|
1064 if (token != CPP_EOF)
|
|
|
1065 {
|
|
|
1066 warning (OPT_Wpragmas, "junk at end of %<#pragma pop_options%>");
|
|
|
1067 return;
|
|
|
1068 }
|
|
|
1069
|
|
|
1070 if (! options_stack)
|
|
|
1071 {
|
|
|
1072 warning (OPT_Wpragmas,
|
|
|
1073 "%<#pragma GCC pop_options%> without a corresponding "
|
|
|
1074 "%<#pragma GCC push_options%>");
|
|
|
1075 return;
|
|
|
1076 }
|
|
|
1077
|
|
|
1078 p = options_stack;
|
|
|
1079 options_stack = p->prev;
|
|
|
1080
|
|
|
1081 if (p->target_binary != target_option_current_node)
|
|
|
1082 {
|
|
|
1083 (void) targetm.target_option.pragma_parse (NULL_TREE, p->target_binary);
|
|
|
1084 target_option_current_node = p->target_binary;
|
|
|
1085 }
|
|
|
1086
|
|
|
1087 if (p->optimize_binary != optimization_current_node)
|
|
|
1088 {
|
|
|
1089 tree old_optimize = optimization_current_node;
|
|
|
1090 cl_optimization_restore (TREE_OPTIMIZATION (p->optimize_binary));
|
|
|
1091 c_cpp_builtins_optimize_pragma (parse_in, old_optimize,
|
|
|
1092 p->optimize_binary);
|
|
|
1093 optimization_current_node = p->optimize_binary;
|
|
|
1094 }
|
|
|
1095
|
|
|
1096 current_target_pragma = p->target_strings;
|
|
|
1097 current_optimize_pragma = p->optimize_strings;
|
|
|
1098 }
|
|
|
1099
|
|
|
1100 /* Handle #pragma GCC reset_options to restore the current target and
|
|
|
1101 optimization options to the original options used on the command line. */
|
|
|
1102
|
|
|
1103 static void
|
|
|
1104 handle_pragma_reset_options (cpp_reader *ARG_UNUSED(dummy))
|
|
|
1105 {
|
|
|
1106 enum cpp_ttype token;
|
|
|
1107 tree x = 0;
|
|
|
1108 tree new_optimize = optimization_default_node;
|
|
|
1109 tree new_target = target_option_default_node;
|
|
|
1110
|
|
|
1111 token = pragma_lex (&x);
|
|
|
1112 if (token != CPP_EOF)
|
|
|
1113 {
|
|
|
1114 warning (OPT_Wpragmas, "junk at end of %<#pragma reset_options%>");
|
|
|
1115 return;
|
|
|
1116 }
|
|
|
1117
|
|
|
1118 if (new_target != target_option_current_node)
|
|
|
1119 {
|
|
|
1120 (void) targetm.target_option.pragma_parse (NULL_TREE, new_target);
|
|
|
1121 target_option_current_node = new_target;
|
|
|
1122 }
|
|
|
1123
|
|
|
1124 if (new_optimize != optimization_current_node)
|
|
|
1125 {
|
|
|
1126 tree old_optimize = optimization_current_node;
|
|
|
1127 cl_optimization_restore (TREE_OPTIMIZATION (new_optimize));
|
|
|
1128 c_cpp_builtins_optimize_pragma (parse_in, old_optimize, new_optimize);
|
|
|
1129 optimization_current_node = new_optimize;
|
|
|
1130 }
|
|
|
1131
|
|
|
1132 current_target_pragma = NULL_TREE;
|
|
|
1133 current_optimize_pragma = NULL_TREE;
|
|
|
1134 }
|
|
|
1135
|
|
|
1136 /* Print a plain user-specified message. */
|
|
|
1137
|
|
|
1138 static void
|
|
|
1139 handle_pragma_message (cpp_reader *ARG_UNUSED(dummy))
|
|
|
1140 {
|
|
|
1141 enum cpp_ttype token;
|
|
|
1142 tree x, message = 0;
|
|
|
1143
|
|
|
1144 token = pragma_lex (&x);
|
|
|
1145 if (token == CPP_OPEN_PAREN)
|
|
|
1146 {
|
|
|
1147 token = pragma_lex (&x);
|
|
|
1148 if (token == CPP_STRING)
|
|
|
1149 message = x;
|
|
|
1150 else
|
|
|
1151 GCC_BAD ("expected a string after %<#pragma message%>");
|
|
|
1152 if (pragma_lex (&x) != CPP_CLOSE_PAREN)
|
|
|
1153 GCC_BAD ("malformed %<#pragma message%>, ignored");
|
|
|
1154 }
|
|
|
1155 else if (token == CPP_STRING)
|
|
|
1156 message = x;
|
|
|
1157 else
|
|
|
1158 GCC_BAD ("expected a string after %<#pragma message%>");
|
|
|
1159
|
|
|
1160 gcc_assert (message);
|
|
|
1161
|
|
|
1162 if (pragma_lex (&x) != CPP_EOF)
|
|
|
1163 warning (OPT_Wpragmas, "junk at end of %<#pragma message%>");
|
|
|
1164
|
|
|
1165 if (TREE_STRING_LENGTH (message) > 1)
|
|
|
1166 inform (input_location, "#pragma message: %s", TREE_STRING_POINTER (message));
|
|
|
1167 }
|
|
|
1168
|
|
|
1169 /* A vector of registered pragma callbacks. */
|
|
|
1170
|
|
|
1171 DEF_VEC_O (pragma_handler);
|
|
|
1172 DEF_VEC_ALLOC_O (pragma_handler, heap);
|
|
|
1173
|
|
|
1174 static VEC(pragma_handler, heap) *registered_pragmas;
|
|
|
1175
|
|
|
1176 typedef struct
|
|
|
1177 {
|
|
|
1178 const char *space;
|
|
|
1179 const char *name;
|
|
|
1180 } pragma_ns_name;
|
|
|
1181
|
|
|
1182 DEF_VEC_O (pragma_ns_name);
|
|
|
1183 DEF_VEC_ALLOC_O (pragma_ns_name, heap);
|
|
|
1184
|
|
|
1185 static VEC(pragma_ns_name, heap) *registered_pp_pragmas;
|
|
|
1186
|
|
|
1187 struct omp_pragma_def { const char *name; unsigned int id; };
|
|
|
1188 static const struct omp_pragma_def omp_pragmas[] = {
|
|
|
1189 { "atomic", PRAGMA_OMP_ATOMIC },
|
|
|
1190 { "barrier", PRAGMA_OMP_BARRIER },
|
|
|
1191 { "critical", PRAGMA_OMP_CRITICAL },
|
|
|
1192 { "flush", PRAGMA_OMP_FLUSH },
|
|
|
1193 { "for", PRAGMA_OMP_FOR },
|
|
|
1194 { "master", PRAGMA_OMP_MASTER },
|
|
|
1195 { "ordered", PRAGMA_OMP_ORDERED },
|
|
|
1196 { "parallel", PRAGMA_OMP_PARALLEL },
|
|
|
1197 { "section", PRAGMA_OMP_SECTION },
|
|
|
1198 { "sections", PRAGMA_OMP_SECTIONS },
|
|
|
1199 { "single", PRAGMA_OMP_SINGLE },
|
|
|
1200 { "task", PRAGMA_OMP_TASK },
|
|
|
1201 { "taskwait", PRAGMA_OMP_TASKWAIT },
|
|
|
1202 { "threadprivate", PRAGMA_OMP_THREADPRIVATE }
|
|
|
1203 };
|
|
|
1204
|
|
|
1205 void
|
|
|
1206 c_pp_lookup_pragma (unsigned int id, const char **space, const char **name)
|
|
|
1207 {
|
|
|
1208 const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
|
|
1209 int i;
|
|
|
1210
|
|
|
1211 for (i = 0; i < n_omp_pragmas; ++i)
|
|
|
1212 if (omp_pragmas[i].id == id)
|
|
|
1213 {
|
|
|
1214 *space = "omp";
|
|
|
1215 *name = omp_pragmas[i].name;
|
|
|
1216 return;
|
|
|
1217 }
|
|
|
1218
|
|
|
1219 if (id >= PRAGMA_FIRST_EXTERNAL
|
|
|
1220 && (id < PRAGMA_FIRST_EXTERNAL
|
|
|
1221 + VEC_length (pragma_ns_name, registered_pp_pragmas)))
|
|
|
1222 {
|
|
|
1223 *space = VEC_index (pragma_ns_name, registered_pp_pragmas,
|
|
|
1224 id - PRAGMA_FIRST_EXTERNAL)->space;
|
|
|
1225 *name = VEC_index (pragma_ns_name, registered_pp_pragmas,
|
|
|
1226 id - PRAGMA_FIRST_EXTERNAL)->name;
|
|
|
1227 return;
|
|
|
1228 }
|
|
|
1229
|
|
|
1230 gcc_unreachable ();
|
|
|
1231 }
|
|
|
1232
|
|
|
1233 /* Front-end wrappers for pragma registration to avoid dragging
|
|
|
1234 cpplib.h in almost everywhere. */
|
|
|
1235
|
|
|
1236 static void
|
|
|
1237 c_register_pragma_1 (const char *space, const char *name,
|
|
|
1238 pragma_handler handler, bool allow_expansion)
|
|
|
1239 {
|
|
|
1240 unsigned id;
|
|
|
1241
|
|
|
1242 if (flag_preprocess_only)
|
|
|
1243 {
|
|
|
1244 pragma_ns_name ns_name;
|
|
|
1245
|
|
|
1246 if (!allow_expansion)
|
|
|
1247 return;
|
|
|
1248
|
|
|
1249 ns_name.space = space;
|
|
|
1250 ns_name.name = name;
|
|
|
1251 VEC_safe_push (pragma_ns_name, heap, registered_pp_pragmas, &ns_name);
|
|
|
1252 id = VEC_length (pragma_ns_name, registered_pp_pragmas);
|
|
|
1253 id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
|
1254 }
|
|
|
1255 else
|
|
|
1256 {
|
|
|
1257 VEC_safe_push (pragma_handler, heap, registered_pragmas, &handler);
|
|
|
1258 id = VEC_length (pragma_handler, registered_pragmas);
|
|
|
1259 id += PRAGMA_FIRST_EXTERNAL - 1;
|
|
|
1260
|
|
|
1261 /* The C++ front end allocates 6 bits in cp_token; the C front end
|
|
|
1262 allocates 7 bits in c_token. At present this is sufficient. */
|
|
|
1263 gcc_assert (id < 64);
|
|
|
1264 }
|
|
|
1265
|
|
|
1266 cpp_register_deferred_pragma (parse_in, space, name, id,
|
|
|
1267 allow_expansion, false);
|
|
|
1268 }
|
|
|
1269
|
|
|
1270 void
|
|
|
1271 c_register_pragma (const char *space, const char *name, pragma_handler handler)
|
|
|
1272 {
|
|
|
1273 c_register_pragma_1 (space, name, handler, false);
|
|
|
1274 }
|
|
|
1275
|
|
|
1276 void
|
|
|
1277 c_register_pragma_with_expansion (const char *space, const char *name,
|
|
|
1278 pragma_handler handler)
|
|
|
1279 {
|
|
|
1280 c_register_pragma_1 (space, name, handler, true);
|
|
|
1281 }
|
|
|
1282
|
|
|
1283 void
|
|
|
1284 c_invoke_pragma_handler (unsigned int id)
|
|
|
1285 {
|
|
|
1286 pragma_handler handler;
|
|
|
1287
|
|
|
1288 id -= PRAGMA_FIRST_EXTERNAL;
|
|
|
1289 handler = *VEC_index (pragma_handler, registered_pragmas, id);
|
|
|
1290
|
|
|
1291 handler (parse_in);
|
|
|
1292 }
|
|
|
1293
|
|
|
1294 /* Set up front-end pragmas. */
|
|
|
1295 void
|
|
|
1296 init_pragma (void)
|
|
|
1297 {
|
|
|
1298 if (flag_openmp)
|
|
|
1299 {
|
|
|
1300 const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);
|
|
|
1301 int i;
|
|
|
1302
|
|
|
1303 for (i = 0; i < n_omp_pragmas; ++i)
|
|
|
1304 cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name,
|
|
|
1305 omp_pragmas[i].id, true, true);
|
|
|
1306 }
|
|
|
1307
|
|
|
1308 if (!flag_preprocess_only)
|
|
|
1309 cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess",
|
|
|
1310 PRAGMA_GCC_PCH_PREPROCESS, false, false);
|
|
|
1311
|
|
|
1312 #ifdef HANDLE_PRAGMA_PACK
|
|
|
1313 #ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION
|
|
|
1314 c_register_pragma_with_expansion (0, "pack", handle_pragma_pack);
|
|
|
1315 #else
|
|
|
1316 c_register_pragma (0, "pack", handle_pragma_pack);
|
|
|
1317 #endif
|
|
|
1318 #endif
|
|
|
1319 #ifdef HANDLE_PRAGMA_PUSH_POP_MACRO
|
|
|
1320 c_register_pragma (0 ,"push_macro", handle_pragma_push_macro);
|
|
|
1321 c_register_pragma (0 ,"pop_macro", handle_pragma_pop_macro);
|
|
|
1322 #endif
|
|
|
1323 #ifdef HANDLE_PRAGMA_WEAK
|
|
|
1324 c_register_pragma (0, "weak", handle_pragma_weak);
|
|
|
1325 #endif
|
|
|
1326 #ifdef HANDLE_PRAGMA_VISIBILITY
|
|
|
1327 c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
|
|
|
1328 #endif
|
|
|
1329
|
|
|
1330 c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic);
|
|
|
1331 c_register_pragma ("GCC", "target", handle_pragma_target);
|
|
|
1332 c_register_pragma ("GCC", "optimize", handle_pragma_optimize);
|
|
|
1333 c_register_pragma ("GCC", "push_options", handle_pragma_push_options);
|
|
|
1334 c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options);
|
|
|
1335 c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options);
|
|
|
1336
|
|
|
1337 c_register_pragma_with_expansion (0, "redefine_extname", handle_pragma_redefine_extname);
|
|
|
1338 c_register_pragma (0, "extern_prefix", handle_pragma_extern_prefix);
|
|
|
1339
|
|
|
1340 c_register_pragma_with_expansion (0, "message", handle_pragma_message);
|
|
|
1341
|
|
|
1342 #ifdef REGISTER_TARGET_PRAGMAS
|
|
|
1343 REGISTER_TARGET_PRAGMAS ();
|
|
|
1344 #endif
|
|
|
1345 }
|
|
|
1346
|
|
|
1347 #include "gt-c-pragma.h"
|
