Mercurial > hg > CbC > CbC_gcc
annotate gcc/lto-section-out.c @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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rev | line source |
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1 /* Functions for writing LTO sections. |
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2 |
145 | 3 Copyright (C) 2009-2020 Free Software Foundation, Inc. |
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4 Contributed by Kenneth Zadeck <zadeck@naturalbridge.com> |
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5 |
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6 This file is part of GCC. |
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7 |
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8 GCC is free software; you can redistribute it and/or modify it under |
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9 the terms of the GNU General Public License as published by the Free |
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10 Software Foundation; either version 3, or (at your option) any later |
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11 version. |
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12 |
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with GCC; see the file COPYING3. If not see |
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20 <http://www.gnu.org/licenses/>. */ |
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21 |
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22 #include "config.h" |
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23 #include "system.h" |
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24 #include "coretypes.h" |
111 | 25 #include "backend.h" |
26 #include "rtl.h" | |
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27 #include "tree.h" |
111 | 28 #include "gimple.h" |
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29 #include "cgraph.h" |
111 | 30 #include "data-streamer.h" |
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31 #include "langhooks.h" |
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32 #include "lto-compress.h" |
131 | 33 #include "print-tree.h" |
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34 |
111 | 35 static vec<lto_out_decl_state_ptr> decl_state_stack; |
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36 |
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37 /* List of out decl states used by functions. We use this to |
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38 generate the decl directory later. */ |
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39 |
111 | 40 vec<lto_out_decl_state_ptr> lto_function_decl_states; |
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41 |
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42 |
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43 /***************************************************************************** |
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44 Output routines shared by all of the serialization passes. |
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45 *****************************************************************************/ |
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46 |
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47 |
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48 /* Flush compressed stream data function, sends NUM_CHARS from CHARS |
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49 to the append lang hook, OPAQUE is currently always NULL. */ |
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50 |
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51 static void |
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52 lto_append_data (const char *chars, unsigned int num_chars, void *opaque) |
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53 { |
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54 gcc_assert (opaque == NULL); |
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55 lang_hooks.lto.append_data (chars, num_chars, opaque); |
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56 } |
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57 |
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58 /* Pointer to the current compression stream. */ |
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59 |
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60 static struct lto_compression_stream *compression_stream = NULL; |
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61 |
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62 /* Begin a new output section named NAME. If COMPRESS is true, zlib compress |
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63 the section. */ |
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64 |
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65 void |
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66 lto_begin_section (const char *name, bool compress) |
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67 { |
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68 lang_hooks.lto.begin_section (name); |
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69 |
131 | 70 if (streamer_dump_file) |
71 { | |
72 if (flag_dump_unnumbered || flag_dump_noaddr) | |
73 fprintf (streamer_dump_file, "Creating %ssection\n", | |
74 compress ? "compressed " : ""); | |
75 else | |
76 fprintf (streamer_dump_file, "Creating %ssection %s\n", | |
77 compress ? "compressed " : "", name); | |
78 } | |
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79 gcc_assert (compression_stream == NULL); |
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80 if (compress) |
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81 compression_stream = lto_start_compression (lto_append_data, NULL); |
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82 } |
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83 |
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84 |
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85 /* End the current output section. */ |
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86 |
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87 void |
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88 lto_end_section (void) |
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89 { |
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90 if (compression_stream) |
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91 { |
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92 lto_end_compression (compression_stream); |
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93 compression_stream = NULL; |
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94 } |
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95 lang_hooks.lto.end_section (); |
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96 } |
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97 |
111 | 98 /* Write SIZE bytes starting at DATA to the assembler. */ |
99 | |
100 void | |
101 lto_write_data (const void *data, unsigned int size) | |
102 { | |
103 if (compression_stream) | |
104 lto_compress_block (compression_stream, (const char *)data, size); | |
105 else | |
106 lang_hooks.lto.append_data ((const char *)data, size, NULL); | |
107 } | |
108 | |
109 /* Write SIZE bytes starting at DATA to the assembler. */ | |
110 | |
111 void | |
112 lto_write_raw_data (const void *data, unsigned int size) | |
113 { | |
114 lang_hooks.lto.append_data ((const char *)data, size, NULL); | |
115 } | |
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116 |
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117 /* Write all of the chars in OBS to the assembler. Recycle the blocks |
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118 in obs as this is being done. */ |
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119 |
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120 void |
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121 lto_write_stream (struct lto_output_stream *obs) |
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122 { |
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123 unsigned int block_size = 1024; |
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124 struct lto_char_ptr_base *block; |
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125 struct lto_char_ptr_base *next_block; |
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126 if (!obs->first_block) |
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127 return; |
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128 |
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129 for (block = obs->first_block; block; block = next_block) |
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130 { |
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131 const char *base = ((char *)block) + sizeof (struct lto_char_ptr_base); |
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132 unsigned int num_chars = block_size - sizeof (struct lto_char_ptr_base); |
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133 |
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134 /* If this is not the last block, it is full. If it is the last |
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135 block, left_in_block indicates how many chars are unoccupied in |
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136 this block; subtract from num_chars to obtain occupancy. */ |
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137 next_block = (struct lto_char_ptr_base *) block->ptr; |
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138 if (!next_block) |
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139 num_chars -= obs->left_in_block; |
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140 |
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141 if (compression_stream) |
111 | 142 lto_compress_block (compression_stream, base, num_chars); |
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143 else |
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144 lang_hooks.lto.append_data (base, num_chars, block); |
111 | 145 free (block); |
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146 block_size *= 2; |
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147 } |
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148 } |
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149 |
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150 |
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151 /* Lookup NAME in ENCODER. If NAME is not found, create a new entry in |
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152 ENCODER for NAME with the next available index of ENCODER, then |
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153 print the index to OBS. True is returned if NAME was added to |
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154 ENCODER. The resulting index is stored in THIS_INDEX. |
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155 |
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156 If OBS is NULL, the only action is to add NAME to the encoder. */ |
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157 |
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158 bool |
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159 lto_output_decl_index (struct lto_output_stream *obs, |
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160 struct lto_tree_ref_encoder *encoder, |
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161 tree name, unsigned int *this_index) |
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162 { |
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163 bool new_entry_p = FALSE; |
111 | 164 bool existed_p; |
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165 |
111 | 166 unsigned int &index |
167 = encoder->tree_hash_table->get_or_insert (name, &existed_p); | |
168 if (!existed_p) | |
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169 { |
111 | 170 index = encoder->trees.length (); |
131 | 171 if (streamer_dump_file) |
172 { | |
173 print_node_brief (streamer_dump_file, " Encoding indexable ", | |
174 name, 4); | |
175 fprintf (streamer_dump_file, " as %i \n", index); | |
176 } | |
111 | 177 encoder->trees.safe_push (name); |
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178 new_entry_p = TRUE; |
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179 } |
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180 |
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181 if (obs) |
111 | 182 streamer_write_uhwi_stream (obs, index); |
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183 *this_index = index; |
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184 return new_entry_p; |
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185 } |
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186 |
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187 /* Output a field DECL to OBS. */ |
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188 |
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189 void |
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190 lto_output_field_decl_index (struct lto_out_decl_state *decl_state, |
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191 struct lto_output_stream * obs, tree decl) |
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192 { |
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193 unsigned int index; |
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194 lto_output_decl_index (obs, &decl_state->streams[LTO_DECL_STREAM_FIELD_DECL], |
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195 decl, &index); |
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196 } |
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197 |
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198 /* Output a function DECL to OBS. */ |
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199 |
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200 void |
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201 lto_output_fn_decl_index (struct lto_out_decl_state *decl_state, |
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202 struct lto_output_stream * obs, tree decl) |
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203 { |
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204 unsigned int index; |
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205 lto_output_decl_index (obs, &decl_state->streams[LTO_DECL_STREAM_FN_DECL], |
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206 decl, &index); |
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207 } |
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208 |
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209 /* Output a namespace DECL to OBS. */ |
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210 |
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211 void |
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212 lto_output_namespace_decl_index (struct lto_out_decl_state *decl_state, |
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213 struct lto_output_stream * obs, tree decl) |
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214 { |
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215 unsigned int index; |
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216 lto_output_decl_index (obs, |
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217 &decl_state->streams[LTO_DECL_STREAM_NAMESPACE_DECL], |
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218 decl, &index); |
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219 } |
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220 |
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221 /* Output a static or extern var DECL to OBS. */ |
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222 |
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223 void |
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224 lto_output_var_decl_index (struct lto_out_decl_state *decl_state, |
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225 struct lto_output_stream * obs, tree decl) |
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226 { |
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227 unsigned int index; |
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228 lto_output_decl_index (obs, &decl_state->streams[LTO_DECL_STREAM_VAR_DECL], |
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229 decl, &index); |
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230 } |
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231 |
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232 /* Output a type DECL to OBS. */ |
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233 |
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234 void |
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235 lto_output_type_decl_index (struct lto_out_decl_state *decl_state, |
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236 struct lto_output_stream * obs, tree decl) |
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237 { |
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238 unsigned int index; |
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239 lto_output_decl_index (obs, &decl_state->streams[LTO_DECL_STREAM_TYPE_DECL], |
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240 decl, &index); |
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241 } |
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242 |
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243 /* Output a type REF to OBS. */ |
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244 |
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245 void |
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246 lto_output_type_ref_index (struct lto_out_decl_state *decl_state, |
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247 struct lto_output_stream *obs, tree ref) |
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248 { |
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249 unsigned int index; |
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250 lto_output_decl_index (obs, &decl_state->streams[LTO_DECL_STREAM_TYPE], |
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251 ref, &index); |
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252 } |
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253 |
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254 |
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255 /* Create the output block and return it. */ |
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256 |
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257 struct lto_simple_output_block * |
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258 lto_create_simple_output_block (enum lto_section_type section_type) |
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259 { |
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260 struct lto_simple_output_block *ob |
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261 = ((struct lto_simple_output_block *) |
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262 xcalloc (1, sizeof (struct lto_simple_output_block))); |
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263 |
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264 ob->section_type = section_type; |
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265 ob->decl_state = lto_get_out_decl_state (); |
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266 ob->main_stream = ((struct lto_output_stream *) |
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267 xcalloc (1, sizeof (struct lto_output_stream))); |
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268 |
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269 return ob; |
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270 } |
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271 |
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272 |
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273 /* Produce a simple section for one of the ipa passes. */ |
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274 |
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275 void |
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276 lto_destroy_simple_output_block (struct lto_simple_output_block *ob) |
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277 { |
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278 char *section_name; |
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279 struct lto_simple_header header; |
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280 |
145 | 281 section_name = lto_get_section_name (ob->section_type, NULL, 0, NULL); |
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282 lto_begin_section (section_name, !flag_wpa); |
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283 free (section_name); |
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284 |
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285 /* Write the header which says how to decode the pieces of the |
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286 t. */ |
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287 memset (&header, 0, sizeof (struct lto_simple_header)); |
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288 header.main_size = ob->main_stream->total_size; |
111 | 289 lto_write_data (&header, sizeof header); |
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290 |
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291 lto_write_stream (ob->main_stream); |
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292 |
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293 /* Put back the assembly section that was there before we started |
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294 writing lto info. */ |
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295 lto_end_section (); |
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296 |
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297 free (ob->main_stream); |
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298 free (ob); |
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299 } |
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300 |
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301 |
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302 /* Return a new lto_out_decl_state. */ |
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303 |
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304 struct lto_out_decl_state * |
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305 lto_new_out_decl_state (void) |
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306 { |
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307 struct lto_out_decl_state *state = XCNEW (struct lto_out_decl_state); |
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308 int i; |
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309 |
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310 for (i = 0; i < LTO_N_DECL_STREAMS; i++) |
111 | 311 lto_init_tree_ref_encoder (&state->streams[i]); |
312 | |
313 /* At WPA time we do not compress sections by default. */ | |
314 state->compressed = !flag_wpa; | |
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315 |
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316 return state; |
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317 } |
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318 |
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319 |
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320 /* Delete STATE and components. */ |
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321 |
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322 void |
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323 lto_delete_out_decl_state (struct lto_out_decl_state *state) |
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324 { |
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325 int i; |
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326 |
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327 for (i = 0; i < LTO_N_DECL_STREAMS; i++) |
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328 lto_destroy_tree_ref_encoder (&state->streams[i]); |
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329 |
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330 free (state); |
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331 } |
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332 |
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333 |
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334 /* Get the currently used lto_out_decl_state structure. */ |
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335 |
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336 struct lto_out_decl_state * |
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337 lto_get_out_decl_state (void) |
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338 { |
111 | 339 return decl_state_stack.last (); |
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340 } |
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341 |
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342 /* Push STATE to top of out decl stack. */ |
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343 |
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344 void |
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345 lto_push_out_decl_state (struct lto_out_decl_state *state) |
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346 { |
111 | 347 decl_state_stack.safe_push (state); |
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348 } |
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349 |
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350 /* Pop the currently used out-decl state from top of stack. */ |
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351 |
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352 struct lto_out_decl_state * |
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353 lto_pop_out_decl_state (void) |
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354 { |
111 | 355 return decl_state_stack.pop (); |
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356 } |
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357 |
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358 /* Record STATE after it has been used in serializing the body of |
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359 FN_DECL. STATE should no longer be used by the caller. The ownership |
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360 of it is taken over from this point. */ |
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361 |
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362 void |
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363 lto_record_function_out_decl_state (tree fn_decl, |
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364 struct lto_out_decl_state *state) |
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365 { |
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366 int i; |
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367 |
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368 /* Strip all hash tables to save some memory. */ |
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369 for (i = 0; i < LTO_N_DECL_STREAMS; i++) |
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370 if (state->streams[i].tree_hash_table) |
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371 { |
111 | 372 delete state->streams[i].tree_hash_table; |
55
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373 state->streams[i].tree_hash_table = NULL; |
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374 } |
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375 state->fn_decl = fn_decl; |
111 | 376 lto_function_decl_states.safe_push (state); |
55
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377 } |