Mercurial > hg > CbC > CbC_gcc
annotate gcc/ipa-reference.c @ 63:b7f97abdc517 gcc-4.6-20100522
update gcc from gcc-4.5.0 to gcc-4.6
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 24 May 2010 12:47:05 +0900 |
| parents | 77e2b8dfacca |
| children | f6334be47118 |
| rev | line source |
|---|---|
| 0 | 1 /* Callgraph based analysis of static variables. |
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2 Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010 |
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3 Free Software Foundation, Inc. |
| 0 | 4 Contributed by Kenneth Zadeck <zadeck@naturalbridge.com> |
| 5 | |
| 6 This file is part of GCC. | |
| 7 | |
| 8 GCC is free software; you can redistribute it and/or modify it under | |
| 9 the terms of the GNU General Public License as published by the Free | |
| 10 Software Foundation; either version 3, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with GCC; see the file COPYING3. If not see | |
| 20 <http://www.gnu.org/licenses/>. */ | |
| 21 | |
| 22 /* This file gathers information about how variables whose scope is | |
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23 confined to the compilation unit are used. |
| 0 | 24 |
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25 The transitive call site specific clobber effects are computed |
| 0 | 26 for the variables whose scope is contained within this compilation |
| 27 unit. | |
| 28 | |
| 29 First each function and static variable initialization is analyzed | |
| 30 to determine which local static variables are either read, written, | |
| 31 or have their address taken. Any local static that has its address | |
| 32 taken is removed from consideration. Once the local read and | |
| 33 writes are determined, a transitive closure of this information is | |
| 34 performed over the call graph to determine the worst case set of | |
| 35 side effects of each call. In later parts of the compiler, these | |
| 36 local and global sets are examined to make the call clobbering less | |
| 37 traumatic, promote some statics to registers, and improve aliasing | |
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38 information. */ |
| 0 | 39 |
| 40 #include "config.h" | |
| 41 #include "system.h" | |
| 42 #include "coretypes.h" | |
| 43 #include "tm.h" | |
| 44 #include "tree.h" | |
| 45 #include "tree-flow.h" | |
| 46 #include "tree-inline.h" | |
| 47 #include "tree-pass.h" | |
| 48 #include "langhooks.h" | |
| 49 #include "pointer-set.h" | |
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50 #include "splay-tree.h" |
| 0 | 51 #include "ggc.h" |
| 52 #include "ipa-utils.h" | |
| 53 #include "ipa-reference.h" | |
| 54 #include "gimple.h" | |
| 55 #include "cgraph.h" | |
| 56 #include "output.h" | |
| 57 #include "flags.h" | |
| 58 #include "timevar.h" | |
| 59 #include "diagnostic.h" | |
| 60 #include "langhooks.h" | |
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61 #include "lto-streamer.h" |
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62 #include "toplev.h" |
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63 |
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64 static void remove_node_data (struct cgraph_node *node, |
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65 void *data ATTRIBUTE_UNUSED); |
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66 static void duplicate_node_data (struct cgraph_node *src, |
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67 struct cgraph_node *dst, |
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68 void *data ATTRIBUTE_UNUSED); |
| 0 | 69 |
| 70 /* The static variables defined within the compilation unit that are | |
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71 loaded or stored directly by function that owns this structure. */ |
| 0 | 72 |
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73 struct ipa_reference_local_vars_info_d |
| 0 | 74 { |
| 75 bitmap statics_read; | |
| 76 bitmap statics_written; | |
| 77 | |
| 78 /* Set when this function calls another function external to the | |
| 79 compilation unit or if the function has a asm clobber of memory. | |
| 80 In general, such calls are modeled as reading and writing all | |
| 81 variables (both bits on) but sometime there are attributes on the | |
| 82 called function so we can do better. */ | |
| 83 bool calls_read_all; | |
| 84 bool calls_write_all; | |
| 85 }; | |
| 86 | |
| 87 /* Statics that are read and written by some set of functions. The | |
| 88 local ones are based on the loads and stores local to the function. | |
| 89 The global ones are based on the local info as well as the | |
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90 transitive closure of the functions that are called. */ |
| 0 | 91 |
| 92 struct ipa_reference_global_vars_info_d | |
| 93 { | |
| 94 bitmap statics_read; | |
| 95 bitmap statics_written; | |
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96 }; |
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97 |
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98 /* Information we save about every function after ipa-reference is completted. */ |
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99 |
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100 struct ipa_reference_optimization_summary_d |
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101 { |
| 0 | 102 bitmap statics_not_read; |
| 103 bitmap statics_not_written; | |
| 104 }; | |
| 105 | |
| 106 typedef struct ipa_reference_local_vars_info_d *ipa_reference_local_vars_info_t; | |
| 107 typedef struct ipa_reference_global_vars_info_d *ipa_reference_global_vars_info_t; | |
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108 typedef struct ipa_reference_optimization_summary_d *ipa_reference_optimization_summary_t; |
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109 |
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110 struct ipa_reference_vars_info_d |
| 0 | 111 { |
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112 struct ipa_reference_local_vars_info_d local; |
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113 struct ipa_reference_global_vars_info_d global; |
| 0 | 114 }; |
| 115 | |
| 116 typedef struct ipa_reference_vars_info_d *ipa_reference_vars_info_t; | |
| 117 | |
| 118 /* This splay tree contains all of the static variables that are | |
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119 being considered by the compilation level alias analysis. */ |
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120 static splay_tree reference_vars_to_consider; |
| 0 | 121 |
| 122 /* A bit is set for every module static we are considering. This is | |
| 123 ored into the local info when asm code is found that clobbers all | |
| 124 memory. */ | |
| 125 static bitmap all_module_statics; | |
| 126 | |
| 127 /* Obstack holding bitmaps of local analysis (live from analysis to | |
| 128 propagation) */ | |
| 129 static bitmap_obstack local_info_obstack; | |
| 130 /* Obstack holding global analysis live forever. */ | |
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131 static bitmap_obstack optimization_summary_obstack; |
| 0 | 132 |
| 133 /* Holders of ipa cgraph hooks: */ | |
| 134 static struct cgraph_2node_hook_list *node_duplication_hook_holder; | |
| 135 static struct cgraph_node_hook_list *node_removal_hook_holder; | |
| 136 | |
| 137 /* Vector where the reference var infos are actually stored. */ | |
| 138 DEF_VEC_P (ipa_reference_vars_info_t); | |
| 139 DEF_VEC_ALLOC_P (ipa_reference_vars_info_t, heap); | |
| 140 static VEC (ipa_reference_vars_info_t, heap) *ipa_reference_vars_vector; | |
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141 DEF_VEC_P (ipa_reference_optimization_summary_t); |
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142 DEF_VEC_ALLOC_P (ipa_reference_optimization_summary_t, heap); |
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143 static VEC (ipa_reference_optimization_summary_t, heap) *ipa_reference_opt_sum_vector; |
| 0 | 144 |
| 145 /* Return the ipa_reference_vars structure starting from the cgraph NODE. */ | |
| 146 static inline ipa_reference_vars_info_t | |
| 147 get_reference_vars_info (struct cgraph_node *node) | |
| 148 { | |
| 149 if (!ipa_reference_vars_vector | |
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150 || VEC_length (ipa_reference_vars_info_t, |
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151 ipa_reference_vars_vector) <= (unsigned int) node->uid) |
| 0 | 152 return NULL; |
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153 return VEC_index (ipa_reference_vars_info_t, ipa_reference_vars_vector, |
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154 node->uid); |
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155 } |
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156 |
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157 /* Return the ipa_reference_vars structure starting from the cgraph NODE. */ |
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158 static inline ipa_reference_optimization_summary_t |
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159 get_reference_optimization_summary (struct cgraph_node *node) |
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160 { |
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161 if (!ipa_reference_opt_sum_vector |
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162 || (VEC_length (ipa_reference_optimization_summary_t, |
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163 ipa_reference_opt_sum_vector) |
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164 <= (unsigned int) node->uid)) |
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165 return NULL; |
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166 return VEC_index (ipa_reference_optimization_summary_t, ipa_reference_opt_sum_vector, |
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167 node->uid); |
| 0 | 168 } |
| 169 | |
| 170 /* Return the ipa_reference_vars structure starting from the cgraph NODE. */ | |
| 171 static inline void | |
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172 set_reference_vars_info (struct cgraph_node *node, |
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173 ipa_reference_vars_info_t info) |
| 0 | 174 { |
| 175 if (!ipa_reference_vars_vector | |
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176 || VEC_length (ipa_reference_vars_info_t, |
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177 ipa_reference_vars_vector) <= (unsigned int) node->uid) |
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178 VEC_safe_grow_cleared (ipa_reference_vars_info_t, heap, |
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179 ipa_reference_vars_vector, node->uid + 1); |
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180 VEC_replace (ipa_reference_vars_info_t, ipa_reference_vars_vector, |
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181 node->uid, info); |
| 0 | 182 } |
| 183 | |
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184 /* Return the ipa_reference_vars structure starting from the cgraph NODE. */ |
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185 static inline void |
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186 set_reference_optimization_summary (struct cgraph_node *node, |
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187 ipa_reference_optimization_summary_t info) |
| 0 | 188 { |
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189 if (!ipa_reference_opt_sum_vector |
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190 || (VEC_length (ipa_reference_optimization_summary_t, |
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191 ipa_reference_opt_sum_vector) |
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192 <= (unsigned int) node->uid)) |
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193 VEC_safe_grow_cleared (ipa_reference_optimization_summary_t, |
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194 heap, ipa_reference_opt_sum_vector, node->uid + 1); |
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195 VEC_replace (ipa_reference_optimization_summary_t, |
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196 ipa_reference_opt_sum_vector, node->uid, info); |
| 0 | 197 } |
| 198 | |
| 199 /* Return a bitmap indexed by_DECL_UID uid for the static variables | |
| 200 that are not read during the execution of the function FN. Returns | |
| 201 NULL if no data is available. */ | |
| 202 | |
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203 bitmap |
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204 ipa_reference_get_not_read_global (struct cgraph_node *fn) |
| 0 | 205 { |
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206 ipa_reference_optimization_summary_t info; |
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207 |
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208 info = get_reference_optimization_summary (fn); |
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209 if (info) |
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210 return info->statics_not_read; |
| 0 | 211 else |
| 212 return NULL; | |
| 213 } | |
| 214 | |
| 215 /* Return a bitmap indexed by DECL_UID uid for the static variables | |
| 216 that are not written during the execution of the function FN. Note | |
| 217 that variables written may or may not be read during the function | |
| 218 call. Returns NULL if no data is available. */ | |
| 219 | |
|
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220 bitmap |
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221 ipa_reference_get_not_written_global (struct cgraph_node *fn) |
| 0 | 222 { |
|
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223 ipa_reference_optimization_summary_t info; |
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224 |
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225 info = get_reference_optimization_summary (fn); |
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226 if (info) |
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227 return info->statics_not_written; |
| 0 | 228 else |
| 229 return NULL; | |
| 230 } | |
| 231 | |
| 232 | |
| 233 | |
| 234 /* Add VAR to all_module_statics and the two | |
| 235 reference_vars_to_consider* sets. */ | |
| 236 | |
|
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237 static inline void |
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238 add_static_var (tree var) |
| 0 | 239 { |
| 240 int uid = DECL_UID (var); | |
| 241 gcc_assert (TREE_CODE (var) == VAR_DECL); | |
| 242 if (!bitmap_bit_p (all_module_statics, uid)) | |
| 243 { | |
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244 if (dump_file) |
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245 splay_tree_insert (reference_vars_to_consider, |
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246 uid, (splay_tree_value)var); |
| 0 | 247 bitmap_set_bit (all_module_statics, uid); |
| 248 } | |
| 249 } | |
| 250 | |
| 251 /* Return true if the variable T is the right kind of static variable to | |
| 252 perform compilation unit scope escape analysis. */ | |
| 253 | |
|
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254 static inline bool |
|
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255 is_proper_for_analysis (tree t) |
| 0 | 256 { |
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257 /* We handle only variables whose address is never taken. */ |
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258 if (TREE_ADDRESSABLE (t)) |
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259 return false; |
| 0 | 260 /* If the variable has the "used" attribute, treat it as if it had a |
| 261 been touched by the devil. */ | |
|
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262 if (DECL_PRESERVE_P (t)) |
| 0 | 263 return false; |
| 264 | |
| 265 /* Do not want to do anything with volatile except mark any | |
| 266 function that uses one to be not const or pure. */ | |
|
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267 if (TREE_THIS_VOLATILE (t)) |
| 0 | 268 return false; |
| 269 | |
| 270 /* We cannot touch decls where the type needs constructing. */ | |
| 271 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (t))) | |
| 272 return false; | |
| 273 | |
| 274 /* This is a variable we care about. Check if we have seen it | |
| 275 before, and if not add it the set of variables we care about. */ | |
|
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276 if (all_module_statics |
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277 && !bitmap_bit_p (all_module_statics, DECL_UID (t))) |
| 0 | 278 add_static_var (t); |
| 279 | |
| 280 return true; | |
| 281 } | |
| 282 | |
| 283 /* Lookup the tree node for the static variable that has UID and | |
| 284 convert the name to a string for debugging. */ | |
| 285 | |
| 286 static const char * | |
| 287 get_static_name (int index) | |
| 288 { | |
|
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289 splay_tree_node stn = |
| 0 | 290 splay_tree_lookup (reference_vars_to_consider, index); |
| 291 if (stn) | |
| 292 return lang_hooks.decl_printable_name ((tree)(stn->value), 2); | |
| 293 return NULL; | |
| 294 } | |
| 295 | |
| 296 /* Or in all of the bits from every callee of X into X_GLOBAL, the caller's cycle, | |
| 297 bit vector. There are several cases to check to avoid the sparse | |
| 298 bitmap oring. */ | |
| 299 | |
| 300 static void | |
| 301 propagate_bits (ipa_reference_global_vars_info_t x_global, struct cgraph_node *x) | |
| 302 { | |
| 303 struct cgraph_edge *e; | |
|
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304 for (e = x->callees; e; e = e->next_callee) |
| 0 | 305 { |
| 306 struct cgraph_node *y = e->callee; | |
| 307 | |
|
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308 /* Only look into nodes we can propagate something. */ |
| 0 | 309 if (cgraph_function_body_availability (e->callee) > AVAIL_OVERWRITABLE) |
| 310 { | |
| 311 if (get_reference_vars_info (y)) | |
| 312 { | |
|
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313 ipa_reference_vars_info_t y_info |
| 0 | 314 = get_reference_vars_info (y); |
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315 ipa_reference_global_vars_info_t y_global = &y_info->global; |
| 0 | 316 |
| 317 /* Calls in current cycle do not have global computed yet. */ | |
|
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318 if (!y_global->statics_read) |
| 0 | 319 continue; |
|
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320 |
| 0 | 321 if (x_global->statics_read |
| 322 != all_module_statics) | |
| 323 { | |
|
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324 if (y_global->statics_read |
| 0 | 325 == all_module_statics) |
| 326 { | |
| 327 BITMAP_FREE (x_global->statics_read); | |
|
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328 x_global->statics_read |
| 0 | 329 = all_module_statics; |
| 330 } | |
| 331 /* Skip bitmaps that are pointer equal to node's bitmap | |
| 332 (no reason to spin within the cycle). */ | |
|
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333 else if (x_global->statics_read |
| 0 | 334 != y_global->statics_read) |
| 335 bitmap_ior_into (x_global->statics_read, | |
| 336 y_global->statics_read); | |
| 337 } | |
|
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338 |
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339 if (x_global->statics_written |
| 0 | 340 != all_module_statics) |
| 341 { | |
|
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342 if (y_global->statics_written |
| 0 | 343 == all_module_statics) |
| 344 { | |
| 345 BITMAP_FREE (x_global->statics_written); | |
|
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346 x_global->statics_written |
| 0 | 347 = all_module_statics; |
| 348 } | |
| 349 /* Skip bitmaps that are pointer equal to node's bitmap | |
| 350 (no reason to spin within the cycle). */ | |
|
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351 else if (x_global->statics_written |
| 0 | 352 != y_global->statics_written) |
| 353 bitmap_ior_into (x_global->statics_written, | |
| 354 y_global->statics_written); | |
| 355 } | |
| 356 } | |
|
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357 else |
| 0 | 358 gcc_unreachable (); |
| 359 } | |
| 360 } | |
| 361 } | |
| 362 | |
| 363 /* The init routine for analyzing global static variable usage. See | |
| 364 comments at top for description. */ | |
|
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365 static void |
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366 ipa_init (void) |
| 0 | 367 { |
|
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368 static bool init_p = false; |
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369 |
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370 if (init_p) |
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371 return; |
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372 |
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373 init_p = true; |
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374 |
|
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375 if (dump_file) |
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376 reference_vars_to_consider = splay_tree_new (splay_tree_compare_ints, 0, 0); |
| 0 | 377 |
| 378 bitmap_obstack_initialize (&local_info_obstack); | |
|
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379 bitmap_obstack_initialize (&optimization_summary_obstack); |
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380 all_module_statics = BITMAP_ALLOC (&local_info_obstack); |
| 0 | 381 |
|
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382 node_removal_hook_holder = |
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383 cgraph_add_node_removal_hook (&remove_node_data, NULL); |
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384 node_duplication_hook_holder = |
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385 cgraph_add_node_duplication_hook (&duplicate_node_data, NULL); |
| 0 | 386 } |
| 387 | |
|
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388 |
| 0 | 389 /* Set up the persistent info for FN. */ |
| 390 | |
| 391 static ipa_reference_local_vars_info_t | |
| 392 init_function_info (struct cgraph_node *fn) | |
| 393 { | |
|
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394 ipa_reference_vars_info_t info |
| 0 | 395 = XCNEW (struct ipa_reference_vars_info_d); |
| 396 | |
| 397 /* Add the info to the tree's annotation. */ | |
| 398 set_reference_vars_info (fn, info); | |
| 399 | |
|
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400 info->local.statics_read = BITMAP_ALLOC (&local_info_obstack); |
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401 info->local.statics_written = BITMAP_ALLOC (&local_info_obstack); |
| 0 | 402 |
|
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403 return &info->local; |
| 0 | 404 } |
| 405 | |
|
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406 |
| 0 | 407 /* This is the main routine for finding the reference patterns for |
| 408 global variables within a function FN. */ | |
|
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409 |
| 0 | 410 static void |
| 411 analyze_function (struct cgraph_node *fn) | |
| 412 { | |
|
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413 ipa_reference_local_vars_info_t local; |
|
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414 struct ipa_ref *ref; |
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415 int i; |
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416 tree var; |
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417 struct cgraph_edge *ie; |
| 0 | 418 |
|
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419 local = init_function_info (fn); |
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420 /* Process indirect calls. All direct calles are handled at propagation |
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421 time. */ |
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422 for (ie = fn->indirect_calls; ie; ie = ie->next_callee) |
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423 if (!(ie->indirect_info->ecf_flags & ECF_CONST)) |
|
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424 { |
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425 local->calls_read_all = true; |
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426 if (!(ie->indirect_info->ecf_flags & ECF_PURE) |
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427 && ((ie->indirect_info->ecf_flags & (ECF_NOTHROW | ECF_NORETURN)) |
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428 != (ECF_NOTHROW | ECF_NORETURN))) |
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429 local->calls_write_all = true; |
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430 } |
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431 for (i = 0; ipa_ref_list_reference_iterate (&fn->ref_list, i, ref); i++) |
| 0 | 432 { |
|
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433 if (ref->refered_type != IPA_REF_VARPOOL) |
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434 continue; |
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435 var = ipa_ref_varpool_node (ref)->decl; |
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436 if (ipa_ref_varpool_node (ref)->externally_visible |
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437 || !ipa_ref_varpool_node (ref)->analyzed |
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438 || !is_proper_for_analysis (var)) |
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439 continue; |
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440 switch (ref->use) |
| 0 | 441 { |
|
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442 case IPA_REF_LOAD: |
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443 bitmap_set_bit (local->statics_read, DECL_UID (var)); |
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444 break; |
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445 case IPA_REF_STORE: |
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446 bitmap_set_bit (local->statics_written, DECL_UID (var)); |
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447 break; |
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448 case IPA_REF_ADDR: |
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449 break; |
| 0 | 450 } |
| 451 } | |
| 452 | |
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453 if ((flags_from_decl_or_type (fn->decl) & (ECF_NOTHROW | ECF_NORETURN)) |
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454 == (ECF_NOTHROW | ECF_NORETURN)) |
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455 { |
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456 local->calls_write_all = false; |
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457 bitmap_clear (local->statics_written); |
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458 } |
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459 |
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460 /* Free bitmaps of direct references if we can not use them anyway. */ |
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461 if (local->calls_write_all) |
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462 BITMAP_FREE (local->statics_written); |
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463 if (local->calls_read_all) |
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464 BITMAP_FREE (local->statics_read); |
| 0 | 465 } |
| 466 | |
| 467 static bitmap | |
| 468 copy_global_bitmap (bitmap src) | |
| 469 { | |
| 470 bitmap dst; | |
| 471 if (!src) | |
| 472 return NULL; | |
|
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473 dst = BITMAP_ALLOC (&optimization_summary_obstack); |
| 0 | 474 bitmap_copy (dst, src); |
| 475 return dst; | |
| 476 } | |
| 477 | |
|
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478 |
| 0 | 479 /* Called when new clone is inserted to callgraph late. */ |
| 480 | |
| 481 static void | |
| 482 duplicate_node_data (struct cgraph_node *src, struct cgraph_node *dst, | |
| 483 void *data ATTRIBUTE_UNUSED) | |
| 484 { | |
|
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485 ipa_reference_optimization_summary_t ginfo; |
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486 ipa_reference_optimization_summary_t dst_ginfo; |
| 0 | 487 |
|
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488 ginfo = get_reference_optimization_summary (src); |
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489 if (!ginfo) |
| 0 | 490 return; |
|
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491 dst_ginfo = XCNEW (struct ipa_reference_optimization_summary_d); |
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492 set_reference_optimization_summary (dst, dst_ginfo); |
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493 dst_ginfo->statics_not_read = copy_global_bitmap (ginfo->statics_not_read); |
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494 dst_ginfo->statics_not_written = copy_global_bitmap (ginfo->statics_not_written); |
| 0 | 495 } |
| 496 | |
| 497 /* Called when node is removed. */ | |
| 498 | |
| 499 static void | |
| 500 remove_node_data (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED) | |
| 501 { | |
|
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502 ipa_reference_optimization_summary_t ginfo; |
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503 ginfo = get_reference_optimization_summary (node); |
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504 if (ginfo) |
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505 { |
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506 if (ginfo->statics_not_read |
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507 && ginfo->statics_not_read != all_module_statics) |
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508 BITMAP_FREE (ginfo->statics_not_read); |
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509 |
|
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510 if (ginfo->statics_not_written |
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511 && ginfo->statics_not_written != all_module_statics) |
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512 BITMAP_FREE (ginfo->statics_not_written); |
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513 free (ginfo); |
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514 set_reference_optimization_summary (node, NULL); |
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515 } |
| 0 | 516 } |
| 517 | |
| 518 /* Analyze each function in the cgraph to see which global or statics | |
| 519 are read or written. */ | |
| 520 | |
|
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521 static void |
| 0 | 522 generate_summary (void) |
| 523 { | |
| 524 struct cgraph_node *node; | |
| 525 unsigned int index; | |
| 526 bitmap_iterator bi; | |
| 527 bitmap bm_temp; | |
|
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528 |
| 0 | 529 ipa_init (); |
| 530 bm_temp = BITMAP_ALLOC (&local_info_obstack); | |
| 531 | |
|
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532 /* Process all of the functions next. */ |
| 0 | 533 for (node = cgraph_nodes; node; node = node->next) |
|
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534 if (node->analyzed) |
| 0 | 535 analyze_function (node); |
| 536 | |
| 537 if (dump_file) | |
| 538 EXECUTE_IF_SET_IN_BITMAP (all_module_statics, 0, index, bi) | |
| 539 { | |
| 540 fprintf (dump_file, "\nPromotable global:%s", | |
| 541 get_static_name (index)); | |
| 542 } | |
|
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543 |
| 0 | 544 BITMAP_FREE(bm_temp); |
|
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545 |
| 0 | 546 if (dump_file) |
| 547 for (node = cgraph_nodes; node; node = node->next) | |
| 548 if (cgraph_function_body_availability (node) >= AVAIL_OVERWRITABLE) | |
| 549 { | |
| 550 ipa_reference_local_vars_info_t l; | |
| 551 unsigned int index; | |
| 552 bitmap_iterator bi; | |
|
55
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553 |
|
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554 l = &get_reference_vars_info (node)->local; |
|
55
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555 fprintf (dump_file, |
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556 "\nFunction name:%s/%i:", |
| 0 | 557 cgraph_node_name (node), node->uid); |
| 558 fprintf (dump_file, "\n locals read: "); | |
|
55
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559 if (l->statics_read) |
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560 EXECUTE_IF_SET_IN_BITMAP (l->statics_read, |
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561 0, index, bi) |
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562 { |
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563 fprintf (dump_file, "%s ", |
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564 get_static_name (index)); |
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565 } |
| 0 | 566 fprintf (dump_file, "\n locals written: "); |
|
55
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567 if (l->statics_written) |
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568 EXECUTE_IF_SET_IN_BITMAP (l->statics_written, |
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569 0, index, bi) |
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570 { |
|
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571 fprintf(dump_file, "%s ", |
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572 get_static_name (index)); |
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573 } |
| 0 | 574 if (l->calls_read_all) |
| 575 fprintf (dump_file, "\n calls read all: "); | |
| 576 if (l->calls_write_all) | |
| 577 fprintf (dump_file, "\n calls read all: "); | |
| 578 } | |
| 579 } | |
| 580 | |
|
55
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581 /* Set READ_ALL/WRITE_ALL based on DECL flags. */ |
|
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|
582 |
|
55
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|
583 static void |
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584 read_write_all_from_decl (tree decl, bool * read_all, bool * write_all) |
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585 { |
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586 int flags = flags_from_decl_or_type (decl); |
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587 if (flags & ECF_CONST) |
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588 ; |
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589 else if (flags & ECF_PURE) |
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590 *read_all = true; |
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591 else |
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592 { |
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593 /* TODO: To be able to produce sane results, we should also handle |
|
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594 common builtins, in particular throw. */ |
|
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595 *read_all = true; |
|
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596 /* When function does not return, it is safe to ignore anythign it writes |
|
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597 to, because the effect will never happen. */ |
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598 if ((flags & (ECF_NOTHROW | ECF_NORETURN)) |
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599 != (ECF_NOTHROW | ECF_NORETURN)) |
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600 *write_all = true; |
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601 } |
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602 } |
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603 |
| 0 | 604 /* Produce the global information by preforming a transitive closure |
|
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605 on the local information that was produced by ipa_analyze_function */ |
| 0 | 606 |
| 607 static unsigned int | |
| 608 propagate (void) | |
| 609 { | |
| 610 struct cgraph_node *node; | |
| 611 struct cgraph_node *w; | |
| 612 struct cgraph_node **order = | |
| 613 XCNEWVEC (struct cgraph_node *, cgraph_n_nodes); | |
|
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614 int order_pos = ipa_utils_reduced_inorder (order, false, true, NULL); |
| 0 | 615 int i; |
| 616 | |
|
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617 if (dump_file) |
| 0 | 618 dump_cgraph (dump_file); |
| 619 | |
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620 ipa_discover_readonly_nonaddressable_vars (); |
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621 generate_summary (); |
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622 |
| 0 | 623 /* Propagate the local information thru the call graph to produce |
| 624 the global information. All the nodes within a cycle will have | |
| 625 the same info so we collapse cycles first. Then we can do the | |
| 626 propagation in one pass from the leaves to the roots. */ | |
|
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627 order_pos = ipa_utils_reduced_inorder (order, true, true, NULL); |
| 0 | 628 if (dump_file) |
| 629 ipa_utils_print_order(dump_file, "reduced", order, order_pos); | |
| 630 | |
| 631 for (i = 0; i < order_pos; i++ ) | |
| 632 { | |
| 633 ipa_reference_vars_info_t node_info; | |
|
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634 ipa_reference_global_vars_info_t node_g; |
| 0 | 635 ipa_reference_local_vars_info_t node_l; |
|
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636 struct cgraph_edge *e; |
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637 |
| 0 | 638 bool read_all; |
| 639 bool write_all; | |
| 640 struct ipa_dfs_info * w_info; | |
| 641 | |
| 642 node = order[i]; | |
| 643 node_info = get_reference_vars_info (node); | |
|
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644 if (!node_info) |
| 0 | 645 { |
| 646 dump_cgraph_node (stderr, node); | |
| 647 dump_cgraph (stderr); | |
| 648 gcc_unreachable (); | |
| 649 } | |
| 650 | |
|
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651 node_l = &node_info->local; |
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652 node_g = &node_info->global; |
| 0 | 653 |
| 654 read_all = node_l->calls_read_all; | |
| 655 write_all = node_l->calls_write_all; | |
| 656 | |
|
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657 /* When function is overwrittable, we can not assume anything. */ |
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658 if (cgraph_function_body_availability (node) <= AVAIL_OVERWRITABLE) |
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659 read_write_all_from_decl (node->decl, &read_all, &write_all); |
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660 |
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661 for (e = node->callees; e; e = e->next_callee) |
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662 if (cgraph_function_body_availability (e->callee) <= AVAIL_OVERWRITABLE) |
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663 read_write_all_from_decl (e->callee->decl, &read_all, &write_all); |
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664 |
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665 |
| 0 | 666 /* If any node in a cycle is calls_read_all or calls_write_all |
| 667 they all are. */ | |
| 668 w_info = (struct ipa_dfs_info *) node->aux; | |
| 669 w = w_info->next_cycle; | |
| 670 while (w) | |
| 671 { | |
|
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672 ipa_reference_local_vars_info_t w_l = |
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673 &get_reference_vars_info (w)->local; |
|
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674 |
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675 /* When function is overwrittable, we can not assume anything. */ |
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676 if (cgraph_function_body_availability (w) <= AVAIL_OVERWRITABLE) |
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677 read_write_all_from_decl (w->decl, &read_all, &write_all); |
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678 |
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679 for (e = w->callees; e; e = e->next_callee) |
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680 if (cgraph_function_body_availability (e->callee) <= AVAIL_OVERWRITABLE) |
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681 read_write_all_from_decl (e->callee->decl, &read_all, &write_all); |
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682 |
| 0 | 683 read_all |= w_l->calls_read_all; |
| 684 write_all |= w_l->calls_write_all; | |
| 685 | |
| 686 w_info = (struct ipa_dfs_info *) w->aux; | |
| 687 w = w_info->next_cycle; | |
| 688 } | |
| 689 | |
|
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690 |
| 0 | 691 /* Initialized the bitmaps for the reduced nodes */ |
|
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692 if (read_all) |
| 0 | 693 node_g->statics_read = all_module_statics; |
|
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694 else |
| 0 | 695 { |
|
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696 node_g->statics_read = BITMAP_ALLOC (&local_info_obstack); |
|
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697 bitmap_copy (node_g->statics_read, |
| 0 | 698 node_l->statics_read); |
| 699 } | |
|
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700 if (write_all) |
| 0 | 701 node_g->statics_written = all_module_statics; |
| 702 else | |
| 703 { | |
|
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704 node_g->statics_written = BITMAP_ALLOC (&local_info_obstack); |
|
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705 bitmap_copy (node_g->statics_written, |
| 0 | 706 node_l->statics_written); |
| 707 } | |
| 708 | |
| 709 propagate_bits (node_g, node); | |
| 710 w_info = (struct ipa_dfs_info *) node->aux; | |
| 711 w = w_info->next_cycle; | |
| 712 while (w) | |
| 713 { | |
|
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714 ipa_reference_vars_info_t w_ri = |
| 0 | 715 get_reference_vars_info (w); |
|
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716 ipa_reference_local_vars_info_t w_l = &w_ri->local; |
|
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717 |
| 0 | 718 /* These global bitmaps are initialized from the local info |
| 719 of all of the nodes in the region. However there is no | |
| 720 need to do any work if the bitmaps were set to | |
| 721 all_module_statics. */ | |
| 722 if (!read_all) | |
| 723 bitmap_ior_into (node_g->statics_read, | |
| 724 w_l->statics_read); | |
| 725 if (!write_all) | |
| 726 bitmap_ior_into (node_g->statics_written, | |
| 727 w_l->statics_written); | |
| 728 propagate_bits (node_g, w); | |
| 729 w_info = (struct ipa_dfs_info *) w->aux; | |
| 730 w = w_info->next_cycle; | |
| 731 } | |
| 732 | |
| 733 /* All nodes within a cycle have the same global info bitmaps. */ | |
|
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734 node_info->global = *node_g; |
| 0 | 735 w_info = (struct ipa_dfs_info *) node->aux; |
| 736 w = w_info->next_cycle; | |
| 737 while (w) | |
| 738 { | |
|
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739 ipa_reference_vars_info_t w_ri = |
| 0 | 740 get_reference_vars_info (w); |
| 741 | |
|
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742 w_ri->global = *node_g; |
| 0 | 743 |
| 744 w_info = (struct ipa_dfs_info *) w->aux; | |
| 745 w = w_info->next_cycle; | |
| 746 } | |
| 747 } | |
| 748 | |
| 749 if (dump_file) | |
| 750 { | |
| 751 for (i = 0; i < order_pos; i++ ) | |
| 752 { | |
| 753 ipa_reference_vars_info_t node_info; | |
| 754 ipa_reference_global_vars_info_t node_g; | |
| 755 ipa_reference_local_vars_info_t node_l; | |
| 756 unsigned int index; | |
| 757 bitmap_iterator bi; | |
| 758 struct ipa_dfs_info * w_info; | |
| 759 | |
| 760 node = order[i]; | |
| 761 node_info = get_reference_vars_info (node); | |
|
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762 node_g = &node_info->global; |
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763 node_l = &node_info->local; |
|
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764 fprintf (dump_file, |
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765 "\nFunction name:%s/%i:", |
| 0 | 766 cgraph_node_name (node), node->uid); |
| 767 fprintf (dump_file, "\n locals read: "); | |
|
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768 if (node_l->statics_read) |
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769 EXECUTE_IF_SET_IN_BITMAP (node_l->statics_read, |
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770 0, index, bi) |
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771 { |
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772 fprintf (dump_file, "%s ", |
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773 get_static_name (index)); |
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774 } |
| 0 | 775 fprintf (dump_file, "\n locals written: "); |
|
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parents:
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diff
changeset
|
776 if (node_l->statics_written) |
|
77e2b8dfacca
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parents:
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diff
changeset
|
777 EXECUTE_IF_SET_IN_BITMAP (node_l->statics_written, |
|
77e2b8dfacca
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parents:
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diff
changeset
|
778 0, index, bi) |
|
77e2b8dfacca
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parents:
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diff
changeset
|
779 { |
|
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update it from 4.4.3 to 4.5.0
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diff
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|
780 fprintf(dump_file, "%s ", |
|
77e2b8dfacca
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parents:
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diff
changeset
|
781 get_static_name (index)); |
|
77e2b8dfacca
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parents:
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diff
changeset
|
782 } |
| 0 | 783 |
| 784 w_info = (struct ipa_dfs_info *) node->aux; | |
| 785 w = w_info->next_cycle; | |
|
55
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parents:
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diff
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|
786 while (w) |
| 0 | 787 { |
|
55
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parents:
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|
788 ipa_reference_vars_info_t w_ri = |
| 0 | 789 get_reference_vars_info (w); |
|
63
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|
790 ipa_reference_local_vars_info_t w_l = &w_ri->local; |
| 0 | 791 fprintf (dump_file, "\n next cycle: %s/%i ", |
| 792 cgraph_node_name (w), w->uid); | |
|
55
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diff
changeset
|
793 fprintf (dump_file, "\n locals read: "); |
|
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diff
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|
794 if (w_l->statics_read) |
|
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parents:
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diff
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|
795 EXECUTE_IF_SET_IN_BITMAP (w_l->statics_read, |
|
77e2b8dfacca
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diff
changeset
|
796 0, index, bi) |
|
77e2b8dfacca
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parents:
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diff
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|
797 { |
|
77e2b8dfacca
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diff
changeset
|
798 fprintf (dump_file, "%s ", |
|
77e2b8dfacca
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parents:
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diff
changeset
|
799 get_static_name (index)); |
|
77e2b8dfacca
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parents:
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diff
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|
800 } |
| 0 | 801 |
| 802 fprintf (dump_file, "\n locals written: "); | |
|
55
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diff
changeset
|
803 if (w_l->statics_written) |
|
77e2b8dfacca
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parents:
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diff
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|
804 EXECUTE_IF_SET_IN_BITMAP (w_l->statics_written, |
|
77e2b8dfacca
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diff
changeset
|
805 0, index, bi) |
|
77e2b8dfacca
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parents:
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diff
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|
806 { |
|
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diff
changeset
|
807 fprintf (dump_file, "%s ", |
|
77e2b8dfacca
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parents:
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diff
changeset
|
808 get_static_name (index)); |
|
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diff
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|
809 } |
| 0 | 810 |
| 811 w_info = (struct ipa_dfs_info *) w->aux; | |
| 812 w = w_info->next_cycle; | |
| 813 } | |
| 814 fprintf (dump_file, "\n globals read: "); | |
|
55
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parents:
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diff
changeset
|
815 if (node_g->statics_read == all_module_statics) |
|
77e2b8dfacca
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parents:
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diff
changeset
|
816 fprintf (dump_file, "ALL"); |
|
77e2b8dfacca
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parents:
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diff
changeset
|
817 else |
|
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parents:
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diff
changeset
|
818 EXECUTE_IF_SET_IN_BITMAP (node_g->statics_read, |
|
77e2b8dfacca
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parents:
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diff
changeset
|
819 0, index, bi) |
|
77e2b8dfacca
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parents:
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diff
changeset
|
820 { |
|
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diff
changeset
|
821 fprintf (dump_file, "%s ", |
|
77e2b8dfacca
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diff
changeset
|
822 get_static_name (index)); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
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parents:
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diff
changeset
|
823 } |
| 0 | 824 fprintf (dump_file, "\n globals written: "); |
|
55
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diff
changeset
|
825 if (node_g->statics_written == all_module_statics) |
|
77e2b8dfacca
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parents:
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diff
changeset
|
826 fprintf (dump_file, "ALL"); |
|
77e2b8dfacca
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parents:
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diff
changeset
|
827 else |
|
77e2b8dfacca
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parents:
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diff
changeset
|
828 EXECUTE_IF_SET_IN_BITMAP (node_g->statics_written, |
|
77e2b8dfacca
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parents:
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changeset
|
829 0, index, bi) |
|
77e2b8dfacca
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parents:
0
diff
changeset
|
830 { |
|
77e2b8dfacca
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parents:
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diff
changeset
|
831 fprintf (dump_file, "%s ", |
|
77e2b8dfacca
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parents:
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diff
changeset
|
832 get_static_name (index)); |
|
77e2b8dfacca
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parents:
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diff
changeset
|
833 } |
| 0 | 834 } |
| 835 } | |
| 836 | |
| 837 /* Cleanup. */ | |
|
63
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diff
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|
838 for (node = cgraph_nodes; node; node = node->next) |
| 0 | 839 { |
| 840 ipa_reference_vars_info_t node_info; | |
| 841 ipa_reference_global_vars_info_t node_g; | |
|
63
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diff
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|
842 ipa_reference_optimization_summary_t opt; |
|
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diff
changeset
|
843 |
|
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diff
changeset
|
844 if (!node->analyzed) |
|
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diff
changeset
|
845 continue; |
|
55
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parents:
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diff
changeset
|
846 |
|
63
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|
847 node_info = get_reference_vars_info (node); |
|
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diff
changeset
|
848 if (cgraph_function_body_availability (node) > AVAIL_OVERWRITABLE) |
|
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diff
changeset
|
849 { |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
850 node_g = &node_info->global; |
| 0 | 851 |
|
63
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diff
changeset
|
852 opt = XCNEW (struct ipa_reference_optimization_summary_d); |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
853 set_reference_optimization_summary (node, opt); |
| 0 | 854 |
|
63
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parents:
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diff
changeset
|
855 /* Create the complimentary sets. */ |
|
b7f97abdc517
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
856 opt->statics_not_read = BITMAP_ALLOC (&optimization_summary_obstack); |
|
b7f97abdc517
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diff
changeset
|
857 opt->statics_not_written = BITMAP_ALLOC (&optimization_summary_obstack); |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
858 |
|
b7f97abdc517
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parents:
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diff
changeset
|
859 if (node_g->statics_read != all_module_statics) |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
860 bitmap_and_compl (opt->statics_not_read, |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
861 all_module_statics, |
|
b7f97abdc517
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diff
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|
862 node_g->statics_read); |
| 0 | 863 |
|
63
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diff
changeset
|
864 if (node_g->statics_written |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
865 != all_module_statics) |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
866 bitmap_and_compl (opt->statics_not_written, |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
867 all_module_statics, |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
868 node_g->statics_written); |
|
b7f97abdc517
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parents:
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diff
changeset
|
869 } |
|
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diff
changeset
|
870 if (node_info) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
871 free (node_info); |
| 0 | 872 if (node->aux) |
| 873 { | |
| 874 free (node->aux); | |
| 875 node->aux = NULL; | |
| 876 } | |
|
63
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parents:
55
diff
changeset
|
877 } |
|
55
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parents:
0
diff
changeset
|
878 |
|
63
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
879 free (order); |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
880 |
| 0 | 881 bitmap_obstack_release (&local_info_obstack); |
|
63
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff
changeset
|
882 VEC_free (ipa_reference_vars_info_t, heap, ipa_reference_vars_vector); |
|
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parents:
55
diff
changeset
|
883 ipa_reference_vars_vector = NULL; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
884 if (dump_file) |
|
b7f97abdc517
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parents:
55
diff
changeset
|
885 splay_tree_delete (reference_vars_to_consider); |
|
b7f97abdc517
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parents:
55
diff
changeset
|
886 reference_vars_to_consider = NULL; |
|
b7f97abdc517
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff
changeset
|
887 all_module_statics = NULL; |
| 0 | 888 return 0; |
| 889 } | |
| 890 | |
|
63
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
|
891 /* Return true if we need to write summary of NODE. */ |
|
b7f97abdc517
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parents:
55
diff
changeset
|
892 |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
893 static bool |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
894 write_node_summary_p (struct cgraph_node *node, |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
895 cgraph_node_set set, |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
896 varpool_node_set vset, |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
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diff
changeset
|
897 bitmap ltrans_statics) |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
898 { |
|
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parents:
55
diff
changeset
|
899 ipa_reference_optimization_summary_t info; |
|
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diff
changeset
|
900 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
901 /* See if we have (non-empty) info. */ |
|
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parents:
55
diff
changeset
|
902 if (!node->analyzed || node->global.inlined_to) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
903 return false; |
|
b7f97abdc517
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parents:
55
diff
changeset
|
904 info = get_reference_optimization_summary (node); |
|
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diff
changeset
|
905 if (!info || (bitmap_empty_p (info->statics_not_read) |
|
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55
diff
changeset
|
906 && bitmap_empty_p (info->statics_not_written))) |
|
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55
diff
changeset
|
907 return false; |
|
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parents:
55
diff
changeset
|
908 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
909 /* See if we want to encode it. |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
910 Encode also referenced functions since constant folding might turn it into |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
911 a direct call. |
|
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55
diff
changeset
|
912 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
913 In future we might also want to include summaries of functions references |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
914 by initializers of constant variables references in current unit. */ |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
915 if (!reachable_from_this_partition_p (node, set) |
|
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55
diff
changeset
|
916 && !referenced_from_this_partition_p (&node->ref_list, set, vset)) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
917 return false; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
918 |
|
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55
diff
changeset
|
919 /* See if the info has non-empty intersections with vars we want to encode. */ |
|
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diff
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|
920 if (!bitmap_intersect_p (info->statics_not_read, ltrans_statics) |
|
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diff
changeset
|
921 && !bitmap_intersect_p (info->statics_not_written, ltrans_statics)) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
922 return false; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
923 return true; |
|
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diff
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|
924 } |
|
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55
diff
changeset
|
925 |
|
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55
diff
changeset
|
926 /* Stream out BITS<RANS_STATICS as list of decls to OB. */ |
|
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diff
changeset
|
927 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
928 static void |
|
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diff
changeset
|
929 stream_out_bitmap (struct lto_simple_output_block *ob, |
|
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diff
changeset
|
930 bitmap bits, bitmap ltrans_statics) |
|
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diff
changeset
|
931 { |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
932 unsigned int count = 0; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
933 unsigned int index; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
934 bitmap_iterator bi; |
|
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diff
changeset
|
935 EXECUTE_IF_AND_IN_BITMAP (bits, ltrans_statics, 0, index, bi) |
|
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diff
changeset
|
936 count ++; |
|
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diff
changeset
|
937 lto_output_uleb128_stream (ob->main_stream, count); |
|
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diff
changeset
|
938 if (!count) |
|
b7f97abdc517
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55
diff
changeset
|
939 return; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
940 EXECUTE_IF_AND_IN_BITMAP (bits, ltrans_statics, 0, index, bi) |
|
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55
diff
changeset
|
941 { |
|
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55
diff
changeset
|
942 tree decl = (tree)splay_tree_lookup (reference_vars_to_consider, index)->value; |
|
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diff
changeset
|
943 lto_output_var_decl_index(ob->decl_state, ob->main_stream, decl); |
|
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55
diff
changeset
|
944 } |
|
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55
diff
changeset
|
945 } |
|
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55
diff
changeset
|
946 |
|
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55
diff
changeset
|
947 /* Serialize the ipa info for lto. */ |
|
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55
diff
changeset
|
948 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
949 static void |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
950 ipa_reference_write_optimization_summary (cgraph_node_set set, |
|
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diff
changeset
|
951 varpool_node_set vset) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
952 { |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
953 struct cgraph_node *node; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
954 struct varpool_node *vnode; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
955 struct lto_simple_output_block *ob |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
956 = lto_create_simple_output_block (LTO_section_ipa_reference); |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
957 unsigned int count = 0; |
|
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55
diff
changeset
|
958 lto_cgraph_encoder_t encoder = ob->decl_state->cgraph_node_encoder; |
|
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diff
changeset
|
959 bitmap ltrans_statics = BITMAP_ALLOC (NULL); |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
960 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
961 reference_vars_to_consider = splay_tree_new (splay_tree_compare_ints, 0, 0); |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
962 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
963 /* See what variables we are interested in. */ |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
964 for (vnode = varpool_nodes; vnode; vnode = vnode->next) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
965 if (referenced_from_this_partition_p (&vnode->ref_list, set, vset)) |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
966 { |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
967 tree decl = vnode->decl; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
968 if (is_proper_for_analysis (decl)) |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
969 { |
|
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55
diff
changeset
|
970 bitmap_set_bit (ltrans_statics, DECL_UID (decl)); |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
971 splay_tree_insert (reference_vars_to_consider, |
|
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
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diff
changeset
|
972 DECL_UID (decl), (splay_tree_value)decl); |
|
b7f97abdc517
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parents:
55
diff
changeset
|
973 } |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
974 } |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
975 |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
976 for (node = cgraph_nodes; node; node = node->next) |
|
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55
diff
changeset
|
977 if (write_node_summary_p (node, set, vset, ltrans_statics)) |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
978 count++; |
|
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55
diff
changeset
|
979 |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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diff
changeset
|
980 lto_output_uleb128_stream (ob->main_stream, count); |
|
b7f97abdc517
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55
diff
changeset
|
981 |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
982 /* Process all of the functions. */ |
|
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
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55
diff
changeset
|
983 for (node = cgraph_nodes; node; node = node->next) |
|
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55
diff
changeset
|
984 if (write_node_summary_p (node, set, vset, ltrans_statics)) |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
985 { |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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parents:
55
diff
changeset
|
986 ipa_reference_optimization_summary_t info; |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
987 int node_ref; |
|
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55
diff
changeset
|
988 |
|
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55
diff
changeset
|
989 info = get_reference_optimization_summary (node); |
|
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diff
changeset
|
990 node_ref = lto_cgraph_encoder_encode (encoder, node); |
|
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diff
changeset
|
991 lto_output_uleb128_stream (ob->main_stream, node_ref); |
|
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55
diff
changeset
|
992 |
|
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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55
diff
changeset
|
993 stream_out_bitmap (ob, info->statics_not_read, ltrans_statics); |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
994 stream_out_bitmap (ob, info->statics_not_written, ltrans_statics); |
|
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55
diff
changeset
|
995 } |
|
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update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
996 BITMAP_FREE (ltrans_statics); |
|
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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55
diff
changeset
|
997 lto_destroy_simple_output_block (ob); |
|
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55
diff
changeset
|
998 splay_tree_delete (reference_vars_to_consider); |
|
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55
diff
changeset
|
999 } |
|
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55
diff
changeset
|
1000 |
|
b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
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55
diff
changeset
|
1001 /* Deserialize the ipa info for lto. */ |
|
b7f97abdc517
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55
diff
changeset
|
1002 |
|
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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55
diff
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|
1003 static void |
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1004 ipa_reference_read_optimization_summary (void) |
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1005 { |
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1006 struct lto_file_decl_data ** file_data_vec |
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1007 = lto_get_file_decl_data (); |
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1008 struct lto_file_decl_data * file_data; |
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1009 unsigned int j = 0; |
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1010 bitmap_obstack_initialize (&optimization_summary_obstack); |
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1011 |
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1012 node_removal_hook_holder = |
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1013 cgraph_add_node_removal_hook (&remove_node_data, NULL); |
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1014 node_duplication_hook_holder = |
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1015 cgraph_add_node_duplication_hook (&duplicate_node_data, NULL); |
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1016 |
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1017 while ((file_data = file_data_vec[j++])) |
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1018 { |
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1019 const char *data; |
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1020 size_t len; |
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1021 struct lto_input_block *ib |
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1022 = lto_create_simple_input_block (file_data, |
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1023 LTO_section_ipa_reference, |
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1024 &data, &len); |
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1025 if (ib) |
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1026 { |
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1027 unsigned int i; |
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1028 unsigned int f_count = lto_input_uleb128 (ib); |
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1029 |
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1030 for (i = 0; i < f_count; i++) |
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1031 { |
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1032 unsigned int j, index; |
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1033 struct cgraph_node *node; |
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1034 ipa_reference_optimization_summary_t info; |
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1035 int v_count; |
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1036 lto_cgraph_encoder_t encoder; |
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1037 |
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1038 index = lto_input_uleb128 (ib); |
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1039 encoder = file_data->cgraph_node_encoder; |
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1040 node = lto_cgraph_encoder_deref (encoder, index); |
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1041 info = XCNEW (struct ipa_reference_optimization_summary_d); |
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1042 set_reference_optimization_summary (node, info); |
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1043 info->statics_not_read = BITMAP_ALLOC (&optimization_summary_obstack); |
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1044 info->statics_not_written = BITMAP_ALLOC (&optimization_summary_obstack); |
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1045 if (dump_file) |
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1046 fprintf (dump_file, |
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1047 "\nFunction name:%s/%i:\n static not read:", |
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1048 cgraph_node_name (node), node->uid); |
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1049 |
|
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1050 /* Set the statics not read. */ |
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1051 v_count = lto_input_uleb128 (ib); |
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1052 for (j = 0; j < (unsigned int)v_count; j++) |
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1053 { |
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1054 unsigned int var_index = lto_input_uleb128 (ib); |
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1055 tree v_decl = lto_file_decl_data_get_var_decl (file_data, |
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1056 var_index); |
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1057 bitmap_set_bit (info->statics_not_read, DECL_UID (v_decl)); |
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1058 if (dump_file) |
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1059 fprintf (dump_file, " %s", |
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1060 lang_hooks.decl_printable_name (v_decl, 2)); |
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1061 } |
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1062 |
|
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1063 if (dump_file) |
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1064 fprintf (dump_file, |
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1065 "\n static not written:"); |
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1066 /* Set the statics not written. */ |
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1067 v_count = lto_input_uleb128 (ib); |
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1068 for (j = 0; j < (unsigned int)v_count; j++) |
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1069 { |
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1070 unsigned int var_index = lto_input_uleb128 (ib); |
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1071 tree v_decl = lto_file_decl_data_get_var_decl (file_data, |
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1072 var_index); |
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1073 bitmap_set_bit (info->statics_not_written, DECL_UID (v_decl)); |
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1074 if (dump_file) |
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1075 fprintf (dump_file, " %s", |
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1076 lang_hooks.decl_printable_name (v_decl, 2)); |
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1077 } |
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1078 if (dump_file) |
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1079 fprintf (dump_file, "\n"); |
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1080 } |
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1081 |
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1082 lto_destroy_simple_input_block (file_data, |
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1083 LTO_section_ipa_reference, |
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1084 ib, data, len); |
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1085 } |
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1086 else |
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1087 /* Fatal error here. We do not want to support compiling ltrans units with |
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1088 different version of compiler or different flags than the WPA unit, so |
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1089 this should never happen. */ |
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1090 fatal_error ("ipa reference summary is missing in ltrans unit"); |
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1091 } |
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1092 } |
| 0 | 1093 |
| 1094 static bool | |
| 1095 gate_reference (void) | |
| 1096 { | |
| 1097 return (flag_ipa_reference | |
| 1098 /* Don't bother doing anything if the program has errors. */ | |
| 1099 && !(errorcount || sorrycount)); | |
| 1100 } | |
| 1101 | |
|
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1102 struct ipa_opt_pass_d pass_ipa_reference = |
| 0 | 1103 { |
| 1104 { | |
| 1105 IPA_PASS, | |
| 1106 "static-var", /* name */ | |
| 1107 gate_reference, /* gate */ | |
| 1108 propagate, /* execute */ | |
| 1109 NULL, /* sub */ | |
| 1110 NULL, /* next */ | |
| 1111 0, /* static_pass_number */ | |
| 1112 TV_IPA_REFERENCE, /* tv_id */ | |
| 1113 0, /* properties_required */ | |
| 1114 0, /* properties_provided */ | |
| 1115 0, /* properties_destroyed */ | |
| 1116 0, /* todo_flags_start */ | |
| 1117 0 /* todo_flags_finish */ | |
| 1118 }, | |
|
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1119 NULL, /* generate_summary */ |
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1120 NULL, /* write_summary */ |
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1121 NULL, /* read_summary */ |
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1122 ipa_reference_write_optimization_summary,/* write_optimization_summary */ |
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1123 ipa_reference_read_optimization_summary,/* read_optimization_summary */ |
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55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
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1124 NULL, /* stmt_fixup */ |
| 0 | 1125 0, /* TODOs */ |
| 1126 NULL, /* function_transform */ | |
| 1127 NULL /* variable_transform */ | |
| 1128 }; |