Mercurial > hg > CbC > CbC_gcc
annotate gcc/lto-streamer.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | f6334be47118 |
children | 84e7813d76e9 |
rev | line source |
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1 /* Miscellaneous utilities for GIMPLE streaming. Things that are used |
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2 in both input and output are here. |
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3 |
111 | 4 Copyright (C) 2009-2017 Free Software Foundation, Inc. |
55
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5 Contributed by Doug Kwan <dougkwan@google.com> |
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6 |
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7 This file is part of GCC. |
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8 |
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9 GCC is free software; you can redistribute it and/or modify it under |
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10 the terms of the GNU General Public License as published by the Free |
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11 Software Foundation; either version 3, or (at your option) any later |
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12 version. |
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13 |
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14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
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15 WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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17 for more details. |
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18 |
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19 You should have received a copy of the GNU General Public License |
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20 along with GCC; see the file COPYING3. If not see |
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21 <http://www.gnu.org/licenses/>. */ |
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22 |
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23 #include "config.h" |
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24 #include "system.h" |
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25 #include "coretypes.h" |
111 | 26 #include "backend.h" |
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27 #include "tree.h" |
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28 #include "gimple.h" |
111 | 29 #include "tree-streamer.h" |
30 #include "cgraph.h" | |
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31 #include "lto-streamer.h" |
111 | 32 #include "toplev.h" |
33 #include "lto-section-names.h" | |
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34 |
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35 /* Statistics gathered during LTO, WPA and LTRANS. */ |
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36 struct lto_stats_d lto_stats; |
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37 |
111 | 38 /* LTO uses bitmaps with different life-times. So use a separate |
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39 obstack for all LTO bitmaps. */ |
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40 static bitmap_obstack lto_obstack; |
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41 static bool lto_obstack_initialized; |
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42 |
111 | 43 const char *section_name_prefix = LTO_SECTION_NAME_PREFIX; |
44 /* Set when streaming LTO for offloading compiler. */ | |
45 bool lto_stream_offload_p; | |
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46 |
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47 /* Return a string representing LTO tag TAG. */ |
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48 |
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49 const char * |
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50 lto_tag_name (enum LTO_tags tag) |
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51 { |
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52 if (lto_tag_is_tree_code_p (tag)) |
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53 { |
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54 /* For tags representing tree nodes, return the name of the |
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55 associated tree code. */ |
111 | 56 return get_tree_code_name (lto_tag_to_tree_code (tag)); |
55
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57 } |
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58 |
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59 if (lto_tag_is_gimple_code_p (tag)) |
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60 { |
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61 /* For tags representing gimple statements, return the name of |
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62 the associated gimple code. */ |
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63 return gimple_code_name[lto_tag_to_gimple_code (tag)]; |
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64 } |
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65 |
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66 switch (tag) |
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67 { |
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68 case LTO_null: |
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69 return "LTO_null"; |
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70 case LTO_bb0: |
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71 return "LTO_bb0"; |
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72 case LTO_bb1: |
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73 return "LTO_bb1"; |
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74 case LTO_eh_region: |
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75 return "LTO_eh_region"; |
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76 case LTO_function: |
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77 return "LTO_function"; |
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78 case LTO_eh_table: |
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79 return "LTO_eh_table"; |
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80 case LTO_ert_cleanup: |
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81 return "LTO_ert_cleanup"; |
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82 case LTO_ert_try: |
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83 return "LTO_ert_try"; |
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84 case LTO_ert_allowed_exceptions: |
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85 return "LTO_ert_allowed_exceptions"; |
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86 case LTO_ert_must_not_throw: |
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87 return "LTO_ert_must_not_throw"; |
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88 case LTO_tree_pickle_reference: |
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89 return "LTO_tree_pickle_reference"; |
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90 case LTO_field_decl_ref: |
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91 return "LTO_field_decl_ref"; |
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92 case LTO_function_decl_ref: |
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93 return "LTO_function_decl_ref"; |
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94 case LTO_label_decl_ref: |
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95 return "LTO_label_decl_ref"; |
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96 case LTO_namespace_decl_ref: |
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97 return "LTO_namespace_decl_ref"; |
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98 case LTO_result_decl_ref: |
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99 return "LTO_result_decl_ref"; |
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100 case LTO_ssa_name_ref: |
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101 return "LTO_ssa_name_ref"; |
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102 case LTO_type_decl_ref: |
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103 return "LTO_type_decl_ref"; |
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104 case LTO_type_ref: |
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105 return "LTO_type_ref"; |
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106 case LTO_global_decl_ref: |
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107 return "LTO_global_decl_ref"; |
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108 default: |
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109 return "LTO_UNKNOWN"; |
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110 } |
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111 } |
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112 |
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113 |
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114 /* Allocate a bitmap from heap. Initializes the LTO obstack if necessary. */ |
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115 |
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116 bitmap |
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117 lto_bitmap_alloc (void) |
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118 { |
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119 if (!lto_obstack_initialized) |
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120 { |
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121 bitmap_obstack_initialize (<o_obstack); |
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122 lto_obstack_initialized = true; |
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123 } |
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124 return BITMAP_ALLOC (<o_obstack); |
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125 } |
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126 |
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127 /* Free bitmap B. */ |
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128 |
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129 void |
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130 lto_bitmap_free (bitmap b) |
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131 { |
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132 BITMAP_FREE (b); |
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133 } |
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134 |
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135 |
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136 /* Get a section name for a particular type or name. The NAME field |
67
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137 is only used if SECTION_TYPE is LTO_section_function_body. For all |
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138 others it is ignored. The callee of this function is responsible |
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139 to free the returned name. */ |
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140 |
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141 char * |
67
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142 lto_get_section_name (int section_type, const char *name, struct lto_file_decl_data *f) |
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143 { |
67
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144 const char *add; |
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145 char post[32]; |
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146 const char *sep; |
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147 |
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148 if (section_type == LTO_section_function_body) |
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149 { |
63
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150 gcc_assert (name != NULL); |
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151 if (name[0] == '*') |
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152 name++; |
67
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153 add = name; |
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154 sep = ""; |
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155 } |
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156 else if (section_type < LTO_N_SECTION_TYPES) |
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157 { |
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158 add = lto_section_name[section_type]; |
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159 sep = "."; |
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160 } |
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161 else |
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162 internal_error ("bytecode stream: unexpected LTO section %s", name); |
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163 |
67
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164 /* Make the section name unique so that ld -r combining sections |
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165 doesn't confuse the reader with merged sections. |
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166 |
67
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167 For options don't add a ID, the option reader cannot deal with them |
111 | 168 and merging should be ok here. */ |
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169 if (section_type == LTO_section_opts) |
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170 strcpy (post, ""); |
111 | 171 else if (f != NULL) |
172 sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, f->id); | |
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173 else |
111 | 174 sprintf (post, "." HOST_WIDE_INT_PRINT_HEX_PURE, get_random_seed (false)); |
175 return concat (section_name_prefix, sep, add, post, NULL); | |
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176 } |
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177 |
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178 |
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179 /* Show various memory usage statistics related to LTO. */ |
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180 |
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181 void |
111 | 182 print_lto_report (const char *s) |
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183 { |
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184 unsigned i; |
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185 |
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186 fprintf (stderr, "[%s] # of input files: " |
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187 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, lto_stats.num_input_files); |
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188 |
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189 fprintf (stderr, "[%s] # of input cgraph nodes: " |
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190 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
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191 lto_stats.num_input_cgraph_nodes); |
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192 |
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193 fprintf (stderr, "[%s] # of function bodies: " |
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194 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
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195 lto_stats.num_function_bodies); |
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196 |
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197 for (i = 0; i < NUM_TREE_CODES; i++) |
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198 if (lto_stats.num_trees[i]) |
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199 fprintf (stderr, "[%s] # of '%s' objects read: " |
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200 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
111 | 201 get_tree_code_name ((enum tree_code) i), lto_stats.num_trees[i]); |
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202 |
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203 if (flag_lto) |
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204 { |
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205 fprintf (stderr, "[%s] Compression: " |
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206 HOST_WIDE_INT_PRINT_UNSIGNED " output bytes, " |
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207 HOST_WIDE_INT_PRINT_UNSIGNED " compressed bytes", s, |
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208 lto_stats.num_output_il_bytes, |
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209 lto_stats.num_compressed_il_bytes); |
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210 if (lto_stats.num_output_il_bytes > 0) |
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211 { |
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212 const float dividend = (float) lto_stats.num_compressed_il_bytes; |
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213 const float divisor = (float) lto_stats.num_output_il_bytes; |
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214 fprintf (stderr, " (ratio: %f)", dividend / divisor); |
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215 } |
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216 fprintf (stderr, "\n"); |
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217 } |
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218 |
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219 if (flag_wpa) |
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220 { |
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221 fprintf (stderr, "[%s] # of output files: " |
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222 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
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223 lto_stats.num_output_files); |
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224 |
111 | 225 fprintf (stderr, "[%s] # of output symtab nodes: " |
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226 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
111 | 227 lto_stats.num_output_symtab_nodes); |
228 | |
229 fprintf (stderr, "[%s] # of output tree pickle references: " | |
230 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
231 lto_stats.num_pickle_refs_output); | |
232 fprintf (stderr, "[%s] # of output tree bodies: " | |
233 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, | |
234 lto_stats.num_tree_bodies_output); | |
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235 |
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236 fprintf (stderr, "[%s] # callgraph partitions: " |
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237 HOST_WIDE_INT_PRINT_UNSIGNED "\n", s, |
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238 lto_stats.num_cgraph_partitions); |
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239 |
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240 fprintf (stderr, "[%s] Compression: " |
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241 HOST_WIDE_INT_PRINT_UNSIGNED " input bytes, " |
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242 HOST_WIDE_INT_PRINT_UNSIGNED " uncompressed bytes", s, |
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243 lto_stats.num_input_il_bytes, |
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244 lto_stats.num_uncompressed_il_bytes); |
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245 if (lto_stats.num_input_il_bytes > 0) |
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246 { |
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247 const float dividend = (float) lto_stats.num_uncompressed_il_bytes; |
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248 const float divisor = (float) lto_stats.num_input_il_bytes; |
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249 fprintf (stderr, " (ratio: %f)", dividend / divisor); |
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250 } |
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251 fprintf (stderr, "\n"); |
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252 } |
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253 |
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254 for (i = 0; i < LTO_N_SECTION_TYPES; i++) |
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255 fprintf (stderr, "[%s] Size of mmap'd section %s: " |
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256 HOST_WIDE_INT_PRINT_UNSIGNED " bytes\n", s, |
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257 lto_section_name[i], lto_stats.section_size[i]); |
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258 } |
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259 |
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260 /* Initialization common to the LTO reader and writer. */ |
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261 |
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262 void |
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263 lto_streamer_init (void) |
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264 { |
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265 /* Check that all the TS_* handled by the reader and writer routines |
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266 match exactly the structures defined in treestruct.def. When a |
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267 new TS_* astructure is added, the streamer should be updated to |
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268 handle it. */ |
111 | 269 if (flag_checking) |
270 streamer_check_handled_ts_structures (); | |
55
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271 } |
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272 |
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273 |
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274 /* Gate function for all LTO streaming passes. */ |
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275 |
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276 bool |
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277 gate_lto_out (void) |
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278 { |
111 | 279 return ((flag_generate_lto || flag_generate_offload || in_lto_p) |
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280 /* Don't bother doing anything if the program has errors. */ |
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281 && !seen_error ()); |
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282 } |
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283 |
111 | 284 /* Check that the version MAJOR.MINOR is the correct version number. */ |
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285 |
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286 void |
111 | 287 lto_check_version (int major, int minor, const char *file_name) |
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288 { |
111 | 289 if (major != LTO_major_version || minor != LTO_minor_version) |
290 fatal_error (input_location, | |
291 "bytecode stream in file %qs generated with LTO version " | |
292 "%d.%d instead of the expected %d.%d", | |
293 file_name, | |
294 major, minor, | |
295 LTO_major_version, LTO_minor_version); | |
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296 } |
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297 |
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298 |
111 | 299 /* Initialize all the streamer hooks used for streaming GIMPLE. */ |
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300 |
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301 void |
111 | 302 lto_streamer_hooks_init (void) |
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303 { |
111 | 304 streamer_hooks_init (); |
305 streamer_hooks.write_tree = lto_output_tree; | |
306 streamer_hooks.read_tree = lto_input_tree; | |
307 streamer_hooks.input_location = lto_input_location; | |
308 streamer_hooks.output_location = lto_output_location; | |
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309 } |