Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-profile.c @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Calculate branch probabilities, and basic block execution counts. |
| 145 | 2 Copyright (C) 1990-2020 Free Software Foundation, Inc. |
| 0 | 3 Contributed by James E. Wilson, UC Berkeley/Cygnus Support; |
| 4 based on some ideas from Dain Samples of UC Berkeley. | |
| 5 Further mangling by Bob Manson, Cygnus Support. | |
| 6 Converted to use trees by Dale Johannesen, Apple Computer. | |
| 7 | |
| 8 This file is part of GCC. | |
| 9 | |
| 10 GCC is free software; you can redistribute it and/or modify it under | |
| 11 the terms of the GNU General Public License as published by the Free | |
| 12 Software Foundation; either version 3, or (at your option) any later | |
| 13 version. | |
| 14 | |
| 15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 16 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 18 for more details. | |
| 19 | |
| 20 You should have received a copy of the GNU General Public License | |
| 21 along with GCC; see the file COPYING3. If not see | |
| 22 <http://www.gnu.org/licenses/>. */ | |
| 23 | |
| 24 /* Generate basic block profile instrumentation and auxiliary files. | |
| 25 Tree-based version. See profile.c for overview. */ | |
| 26 | |
| 27 #include "config.h" | |
| 28 #include "system.h" | |
| 29 #include "coretypes.h" | |
| 111 | 30 #include "memmodel.h" |
| 31 #include "backend.h" | |
| 32 #include "target.h" | |
| 33 #include "tree.h" | |
| 34 #include "gimple.h" | |
| 35 #include "cfghooks.h" | |
| 36 #include "tree-pass.h" | |
| 37 #include "ssa.h" | |
| 38 #include "cgraph.h" | |
| 0 | 39 #include "coverage.h" |
| 111 | 40 #include "diagnostic-core.h" |
| 41 #include "fold-const.h" | |
| 42 #include "varasm.h" | |
| 43 #include "tree-nested.h" | |
| 44 #include "gimplify.h" | |
| 45 #include "gimple-iterator.h" | |
| 46 #include "gimplify-me.h" | |
| 47 #include "tree-cfg.h" | |
| 48 #include "tree-into-ssa.h" | |
| 0 | 49 #include "value-prof.h" |
| 111 | 50 #include "profile.h" |
| 51 #include "tree-cfgcleanup.h" | |
| 52 #include "stringpool.h" | |
| 53 #include "attribs.h" | |
| 131 | 54 #include "tree-pretty-print.h" |
| 55 #include "langhooks.h" | |
| 56 #include "stor-layout.h" | |
| 145 | 57 #include "xregex.h" |
| 0 | 58 |
| 59 static GTY(()) tree gcov_type_node; | |
| 60 static GTY(()) tree tree_interval_profiler_fn; | |
| 61 static GTY(()) tree tree_pow2_profiler_fn; | |
| 145 | 62 static GTY(()) tree tree_topn_values_profiler_fn; |
| 0 | 63 static GTY(()) tree tree_indirect_call_profiler_fn; |
| 64 static GTY(()) tree tree_average_profiler_fn; | |
| 65 static GTY(()) tree tree_ior_profiler_fn; | |
| 111 | 66 static GTY(()) tree tree_time_profiler_counter; |
| 67 | |
| 0 | 68 |
| 131 | 69 static GTY(()) tree ic_tuple_var; |
| 70 static GTY(()) tree ic_tuple_counters_field; | |
| 71 static GTY(()) tree ic_tuple_callee_field; | |
| 0 | 72 |
| 73 /* Do initialization work for the edge profiler. */ | |
| 74 | |
| 75 /* Add code: | |
| 145 | 76 __thread gcov* __gcov_indirect_call.counters; // pointer to actual counter |
| 77 __thread void* __gcov_indirect_call.callee; // actual callee address | |
| 111 | 78 __thread int __gcov_function_counter; // time profiler function counter |
| 0 | 79 */ |
| 80 static void | |
|
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81 init_ic_make_global_vars (void) |
| 0 | 82 { |
| 111 | 83 tree gcov_type_ptr; |
| 0 | 84 |
| 131 | 85 gcov_type_ptr = build_pointer_type (get_gcov_type ()); |
| 86 | |
| 87 tree tuple_type = lang_hooks.types.make_type (RECORD_TYPE); | |
| 88 | |
| 89 /* callee */ | |
| 90 ic_tuple_callee_field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
| 91 ptr_type_node); | |
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92 |
| 131 | 93 /* counters */ |
| 94 ic_tuple_counters_field = build_decl (BUILTINS_LOCATION, FIELD_DECL, | |
| 95 NULL_TREE, gcov_type_ptr); | |
| 96 DECL_CHAIN (ic_tuple_counters_field) = ic_tuple_callee_field; | |
| 97 | |
| 98 finish_builtin_struct (tuple_type, "indirect_call_tuple", | |
| 99 ic_tuple_counters_field, NULL_TREE); | |
| 100 | |
| 101 ic_tuple_var | |
|
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102 = build_decl (UNKNOWN_LOCATION, VAR_DECL, |
| 145 | 103 get_identifier ("__gcov_indirect_call"), tuple_type); |
| 131 | 104 TREE_PUBLIC (ic_tuple_var) = 1; |
| 105 DECL_ARTIFICIAL (ic_tuple_var) = 1; | |
| 106 DECL_INITIAL (ic_tuple_var) = NULL; | |
| 107 DECL_EXTERNAL (ic_tuple_var) = 1; | |
| 111 | 108 if (targetm.have_tls) |
| 145 | 109 set_decl_tls_model (ic_tuple_var, decl_default_tls_model (ic_tuple_var)); |
| 0 | 110 } |
| 111 | |
| 111 | 112 /* Create the type and function decls for the interface with gcov. */ |
| 113 | |
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114 void |
| 111 | 115 gimple_init_gcov_profiler (void) |
| 0 | 116 { |
| 117 tree interval_profiler_fn_type; | |
| 118 tree pow2_profiler_fn_type; | |
| 145 | 119 tree topn_values_profiler_fn_type; |
| 0 | 120 tree gcov_type_ptr; |
| 121 tree ic_profiler_fn_type; | |
| 122 tree average_profiler_fn_type; | |
| 111 | 123 const char *fn_name; |
| 0 | 124 |
| 125 if (!gcov_type_node) | |
| 126 { | |
| 111 | 127 const char *fn_suffix |
| 128 = flag_profile_update == PROFILE_UPDATE_ATOMIC ? "_atomic" : ""; | |
| 129 | |
| 0 | 130 gcov_type_node = get_gcov_type (); |
| 131 gcov_type_ptr = build_pointer_type (gcov_type_node); | |
| 132 | |
| 133 /* void (*) (gcov_type *, gcov_type, int, unsigned) */ | |
| 134 interval_profiler_fn_type | |
| 135 = build_function_type_list (void_type_node, | |
| 136 gcov_type_ptr, gcov_type_node, | |
| 137 integer_type_node, | |
| 138 unsigned_type_node, NULL_TREE); | |
| 111 | 139 fn_name = concat ("__gcov_interval_profiler", fn_suffix, NULL); |
| 140 tree_interval_profiler_fn = build_fn_decl (fn_name, | |
| 141 interval_profiler_fn_type); | |
| 142 free (CONST_CAST (char *, fn_name)); | |
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143 TREE_NOTHROW (tree_interval_profiler_fn) = 1; |
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144 DECL_ATTRIBUTES (tree_interval_profiler_fn) |
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145 = tree_cons (get_identifier ("leaf"), NULL, |
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146 DECL_ATTRIBUTES (tree_interval_profiler_fn)); |
| 0 | 147 |
| 148 /* void (*) (gcov_type *, gcov_type) */ | |
| 149 pow2_profiler_fn_type | |
| 150 = build_function_type_list (void_type_node, | |
| 151 gcov_type_ptr, gcov_type_node, | |
| 152 NULL_TREE); | |
| 111 | 153 fn_name = concat ("__gcov_pow2_profiler", fn_suffix, NULL); |
| 154 tree_pow2_profiler_fn = build_fn_decl (fn_name, pow2_profiler_fn_type); | |
| 155 free (CONST_CAST (char *, fn_name)); | |
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156 TREE_NOTHROW (tree_pow2_profiler_fn) = 1; |
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157 DECL_ATTRIBUTES (tree_pow2_profiler_fn) |
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158 = tree_cons (get_identifier ("leaf"), NULL, |
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159 DECL_ATTRIBUTES (tree_pow2_profiler_fn)); |
| 0 | 160 |
| 161 /* void (*) (gcov_type *, gcov_type) */ | |
| 145 | 162 topn_values_profiler_fn_type |
| 0 | 163 = build_function_type_list (void_type_node, |
| 164 gcov_type_ptr, gcov_type_node, | |
| 165 NULL_TREE); | |
| 145 | 166 fn_name = concat ("__gcov_topn_values_profiler", fn_suffix, NULL); |
| 167 tree_topn_values_profiler_fn | |
| 168 = build_fn_decl (fn_name, topn_values_profiler_fn_type); | |
| 111 | 169 free (CONST_CAST (char *, fn_name)); |
| 145 | 170 |
| 171 TREE_NOTHROW (tree_topn_values_profiler_fn) = 1; | |
| 172 DECL_ATTRIBUTES (tree_topn_values_profiler_fn) | |
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173 = tree_cons (get_identifier ("leaf"), NULL, |
| 145 | 174 DECL_ATTRIBUTES (tree_topn_values_profiler_fn)); |
| 0 | 175 |
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176 init_ic_make_global_vars (); |
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177 |
| 111 | 178 /* void (*) (gcov_type, void *) */ |
| 0 | 179 ic_profiler_fn_type |
| 180 = build_function_type_list (void_type_node, | |
| 111 | 181 gcov_type_node, |
| 131 | 182 ptr_type_node, |
| 111 | 183 NULL_TREE); |
| 145 | 184 fn_name = concat ("__gcov_indirect_call_profiler_v4", fn_suffix, NULL); |
| 0 | 185 tree_indirect_call_profiler_fn |
| 145 | 186 = build_fn_decl (fn_name, ic_profiler_fn_type); |
| 187 free (CONST_CAST (char *, fn_name)); | |
| 111 | 188 |
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189 TREE_NOTHROW (tree_indirect_call_profiler_fn) = 1; |
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190 DECL_ATTRIBUTES (tree_indirect_call_profiler_fn) |
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191 = tree_cons (get_identifier ("leaf"), NULL, |
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192 DECL_ATTRIBUTES (tree_indirect_call_profiler_fn)); |
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193 |
| 111 | 194 tree_time_profiler_counter |
| 195 = build_decl (UNKNOWN_LOCATION, VAR_DECL, | |
| 196 get_identifier ("__gcov_time_profiler_counter"), | |
| 197 get_gcov_type ()); | |
| 198 TREE_PUBLIC (tree_time_profiler_counter) = 1; | |
| 199 DECL_EXTERNAL (tree_time_profiler_counter) = 1; | |
| 200 TREE_STATIC (tree_time_profiler_counter) = 1; | |
| 201 DECL_ARTIFICIAL (tree_time_profiler_counter) = 1; | |
| 202 DECL_INITIAL (tree_time_profiler_counter) = NULL; | |
| 203 | |
| 0 | 204 /* void (*) (gcov_type *, gcov_type) */ |
| 205 average_profiler_fn_type | |
| 206 = build_function_type_list (void_type_node, | |
| 207 gcov_type_ptr, gcov_type_node, NULL_TREE); | |
| 111 | 208 fn_name = concat ("__gcov_average_profiler", fn_suffix, NULL); |
| 209 tree_average_profiler_fn = build_fn_decl (fn_name, | |
| 210 average_profiler_fn_type); | |
| 211 free (CONST_CAST (char *, fn_name)); | |
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212 TREE_NOTHROW (tree_average_profiler_fn) = 1; |
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213 DECL_ATTRIBUTES (tree_average_profiler_fn) |
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214 = tree_cons (get_identifier ("leaf"), NULL, |
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215 DECL_ATTRIBUTES (tree_average_profiler_fn)); |
| 111 | 216 fn_name = concat ("__gcov_ior_profiler", fn_suffix, NULL); |
| 217 tree_ior_profiler_fn = build_fn_decl (fn_name, average_profiler_fn_type); | |
| 218 free (CONST_CAST (char *, fn_name)); | |
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219 TREE_NOTHROW (tree_ior_profiler_fn) = 1; |
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220 DECL_ATTRIBUTES (tree_ior_profiler_fn) |
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221 = tree_cons (get_identifier ("leaf"), NULL, |
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222 DECL_ATTRIBUTES (tree_ior_profiler_fn)); |
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223 |
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224 /* LTO streamer needs assembler names. Because we create these decls |
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225 late, we need to initialize them by hand. */ |
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226 DECL_ASSEMBLER_NAME (tree_interval_profiler_fn); |
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227 DECL_ASSEMBLER_NAME (tree_pow2_profiler_fn); |
| 145 | 228 DECL_ASSEMBLER_NAME (tree_topn_values_profiler_fn); |
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229 DECL_ASSEMBLER_NAME (tree_indirect_call_profiler_fn); |
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230 DECL_ASSEMBLER_NAME (tree_average_profiler_fn); |
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231 DECL_ASSEMBLER_NAME (tree_ior_profiler_fn); |
| 0 | 232 } |
| 233 } | |
| 234 | |
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235 /* Output instructions as GIMPLE trees to increment the edge |
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236 execution count, and insert them on E. We rely on |
| 0 | 237 gsi_insert_on_edge to preserve the order. */ |
| 238 | |
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239 void |
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240 gimple_gen_edge_profiler (int edgeno, edge e) |
| 0 | 241 { |
| 111 | 242 tree one; |
| 0 | 243 |
| 244 one = build_int_cst (gcov_type_node, 1); | |
| 111 | 245 |
| 246 if (flag_profile_update == PROFILE_UPDATE_ATOMIC) | |
| 247 { | |
| 248 /* __atomic_fetch_add (&counter, 1, MEMMODEL_RELAXED); */ | |
| 249 tree addr = tree_coverage_counter_addr (GCOV_COUNTER_ARCS, edgeno); | |
| 250 tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 | |
| 251 ? BUILT_IN_ATOMIC_FETCH_ADD_8: | |
| 252 BUILT_IN_ATOMIC_FETCH_ADD_4); | |
| 253 gcall *stmt = gimple_build_call (f, 3, addr, one, | |
| 254 build_int_cst (integer_type_node, | |
| 255 MEMMODEL_RELAXED)); | |
| 256 gsi_insert_on_edge (e, stmt); | |
| 257 } | |
| 258 else | |
| 259 { | |
| 260 tree ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno); | |
| 261 tree gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, | |
| 262 NULL, "PROF_edge_counter"); | |
| 263 gassign *stmt1 = gimple_build_assign (gcov_type_tmp_var, ref); | |
| 264 gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, | |
| 265 NULL, "PROF_edge_counter"); | |
| 266 gassign *stmt2 = gimple_build_assign (gcov_type_tmp_var, PLUS_EXPR, | |
| 267 gimple_assign_lhs (stmt1), one); | |
| 268 gassign *stmt3 = gimple_build_assign (unshare_expr (ref), | |
| 269 gimple_assign_lhs (stmt2)); | |
| 270 gsi_insert_on_edge (e, stmt1); | |
| 271 gsi_insert_on_edge (e, stmt2); | |
| 272 gsi_insert_on_edge (e, stmt3); | |
| 273 } | |
| 0 | 274 } |
| 275 | |
| 276 /* Emits code to get VALUE to instrument at GSI, and returns the | |
| 277 variable containing the value. */ | |
| 278 | |
| 279 static tree | |
| 280 prepare_instrumented_value (gimple_stmt_iterator *gsi, histogram_value value) | |
| 281 { | |
| 282 tree val = value->hvalue.value; | |
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283 if (POINTER_TYPE_P (TREE_TYPE (val))) |
| 111 | 284 val = fold_convert (build_nonstandard_integer_type |
| 285 (TYPE_PRECISION (TREE_TYPE (val)), 1), val); | |
| 0 | 286 return force_gimple_operand_gsi (gsi, fold_convert (gcov_type_node, val), |
| 287 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 288 } | |
| 289 | |
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290 /* Output instructions as GIMPLE trees to increment the interval histogram |
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291 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 292 tag of the section for counters, BASE is offset of the counter position. */ |
| 293 | |
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294 void |
| 145 | 295 gimple_gen_interval_profiler (histogram_value value, unsigned tag) |
| 0 | 296 { |
| 111 | 297 gimple *stmt = value->hvalue.stmt; |
| 0 | 298 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 145 | 299 tree ref = tree_coverage_counter_ref (tag, 0), ref_ptr; |
| 111 | 300 gcall *call; |
| 0 | 301 tree val; |
| 302 tree start = build_int_cst_type (integer_type_node, | |
| 303 value->hdata.intvl.int_start); | |
| 304 tree steps = build_int_cst_type (unsigned_type_node, | |
| 305 value->hdata.intvl.steps); | |
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306 |
| 0 | 307 ref_ptr = force_gimple_operand_gsi (&gsi, |
| 111 | 308 build_addr (ref), |
| 0 | 309 true, NULL_TREE, true, GSI_SAME_STMT); |
| 310 val = prepare_instrumented_value (&gsi, value); | |
| 311 call = gimple_build_call (tree_interval_profiler_fn, 4, | |
| 312 ref_ptr, val, start, steps); | |
| 313 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 314 } | |
| 315 | |
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316 /* Output instructions as GIMPLE trees to increment the power of two histogram |
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317 counter. VALUE is the expression whose value is profiled. TAG is the tag |
| 145 | 318 of the section for counters. */ |
| 0 | 319 |
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320 void |
| 145 | 321 gimple_gen_pow2_profiler (histogram_value value, unsigned tag) |
| 0 | 322 { |
| 111 | 323 gimple *stmt = value->hvalue.stmt; |
| 0 | 324 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 145 | 325 tree ref_ptr = tree_coverage_counter_addr (tag, 0); |
| 111 | 326 gcall *call; |
| 0 | 327 tree val; |
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328 |
| 0 | 329 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 330 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 331 val = prepare_instrumented_value (&gsi, value); | |
| 332 call = gimple_build_call (tree_pow2_profiler_fn, 2, ref_ptr, val); | |
| 333 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 334 } | |
| 335 | |
| 145 | 336 /* Output instructions as GIMPLE trees for code to find the most N common |
| 337 values. VALUE is the expression whose value is profiled. TAG is the tag | |
| 338 of the section for counters. */ | |
| 0 | 339 |
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340 void |
| 145 | 341 gimple_gen_topn_values_profiler (histogram_value value, unsigned tag) |
| 0 | 342 { |
| 111 | 343 gimple *stmt = value->hvalue.stmt; |
| 0 | 344 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 145 | 345 tree ref_ptr = tree_coverage_counter_addr (tag, 0); |
| 111 | 346 gcall *call; |
| 0 | 347 tree val; |
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348 |
| 0 | 349 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 350 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 351 val = prepare_instrumented_value (&gsi, value); | |
| 145 | 352 call = gimple_build_call (tree_topn_values_profiler_fn, 2, ref_ptr, val); |
| 0 | 353 gsi_insert_before (&gsi, call, GSI_NEW_STMT); |
| 354 } | |
| 355 | |
| 356 | |
| 357 /* Output instructions as GIMPLE trees for code to find the most | |
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358 common called function in indirect call. |
| 0 | 359 VALUE is the call expression whose indirect callee is profiled. |
| 145 | 360 TAG is the tag of the section for counters. */ |
| 0 | 361 |
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362 void |
| 145 | 363 gimple_gen_ic_profiler (histogram_value value, unsigned tag) |
| 0 | 364 { |
| 365 tree tmp1; | |
| 111 | 366 gassign *stmt1, *stmt2, *stmt3; |
| 367 gimple *stmt = value->hvalue.stmt; | |
| 0 | 368 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 145 | 369 tree ref_ptr = tree_coverage_counter_addr (tag, 0); |
| 111 | 370 |
| 0 | 371 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 372 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 373 | |
| 374 /* Insert code: | |
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375 |
| 131 | 376 stmt1: __gcov_indirect_call.counters = get_relevant_counter_ptr (); |
| 111 | 377 stmt2: tmp1 = (void *) (indirect call argument value) |
| 131 | 378 stmt3: __gcov_indirect_call.callee = tmp1; |
| 111 | 379 |
| 380 Example: | |
| 381 f_1 = foo; | |
| 131 | 382 __gcov_indirect_call.counters = &__gcov4.main[0]; |
| 111 | 383 PROF_9 = f_1; |
| 145 | 384 __gcov_indirect_call.callee = PROF_9; |
| 111 | 385 _4 = f_1 (); |
| 0 | 386 */ |
| 387 | |
| 131 | 388 tree gcov_type_ptr = build_pointer_type (get_gcov_type ()); |
| 389 | |
| 390 tree counter_ref = build3 (COMPONENT_REF, gcov_type_ptr, | |
| 391 ic_tuple_var, ic_tuple_counters_field, NULL_TREE); | |
| 392 | |
| 393 stmt1 = gimple_build_assign (counter_ref, ref_ptr); | |
| 394 tmp1 = make_temp_ssa_name (ptr_type_node, NULL, "PROF"); | |
| 0 | 395 stmt2 = gimple_build_assign (tmp1, unshare_expr (value->hvalue.value)); |
| 131 | 396 tree callee_ref = build3 (COMPONENT_REF, ptr_type_node, |
| 397 ic_tuple_var, ic_tuple_callee_field, NULL_TREE); | |
| 398 stmt3 = gimple_build_assign (callee_ref, tmp1); | |
| 0 | 399 |
| 400 gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); | |
| 401 gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT); | |
| 402 gsi_insert_before (&gsi, stmt3, GSI_SAME_STMT); | |
| 403 } | |
| 404 | |
| 405 | |
| 406 /* Output instructions as GIMPLE trees for code to find the most | |
| 407 common called function in indirect call. Insert instructions at the | |
| 408 beginning of every possible called function. | |
| 409 */ | |
| 410 | |
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411 void |
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412 gimple_gen_ic_func_profiler (void) |
| 0 | 413 { |
| 111 | 414 struct cgraph_node * c_node = cgraph_node::get (current_function_decl); |
| 415 gcall *stmt1; | |
| 416 tree tree_uid, cur_func, void0; | |
| 0 | 417 |
| 111 | 418 if (c_node->only_called_directly_p ()) |
| 0 | 419 return; |
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420 |
| 111 | 421 gimple_init_gcov_profiler (); |
| 422 | |
| 423 basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); | |
| 424 basic_block cond_bb = split_edge (single_succ_edge (entry)); | |
| 425 basic_block update_bb = split_edge (single_succ_edge (cond_bb)); | |
| 426 | |
| 427 /* We need to do an extra split in order to not create an input | |
| 428 for a possible PHI node. */ | |
| 429 split_edge (single_succ_edge (update_bb)); | |
| 430 | |
| 431 edge true_edge = single_succ_edge (cond_bb); | |
| 432 true_edge->flags = EDGE_TRUE_VALUE; | |
| 433 | |
| 434 profile_probability probability; | |
| 435 if (DECL_VIRTUAL_P (current_function_decl)) | |
| 436 probability = profile_probability::very_likely (); | |
| 437 else | |
| 438 probability = profile_probability::unlikely (); | |
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439 |
| 111 | 440 true_edge->probability = probability; |
| 441 edge e = make_edge (cond_bb, single_succ_edge (update_bb)->dest, | |
| 442 EDGE_FALSE_VALUE); | |
| 443 e->probability = true_edge->probability.invert (); | |
| 444 | |
| 445 /* Insert code: | |
| 446 | |
| 145 | 447 if (__gcov_indirect_call.callee != NULL) |
| 448 __gcov_indirect_call_profiler_v3 (profile_id, ¤t_function_decl); | |
| 111 | 449 |
| 145 | 450 The function __gcov_indirect_call_profiler_v3 is responsible for |
| 451 resetting __gcov_indirect_call.callee to NULL. */ | |
| 111 | 452 |
| 453 gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); | |
| 131 | 454 void0 = build_int_cst (ptr_type_node, 0); |
| 111 | 455 |
| 131 | 456 tree callee_ref = build3 (COMPONENT_REF, ptr_type_node, |
| 457 ic_tuple_var, ic_tuple_callee_field, NULL_TREE); | |
| 458 | |
| 459 tree ref = force_gimple_operand_gsi (&gsi, callee_ref, true, NULL_TREE, | |
| 111 | 460 true, GSI_SAME_STMT); |
| 461 | |
| 462 gcond *cond = gimple_build_cond (NE_EXPR, ref, | |
| 463 void0, NULL, NULL); | |
| 464 gsi_insert_before (&gsi, cond, GSI_NEW_STMT); | |
| 465 | |
| 466 gsi = gsi_after_labels (update_bb); | |
| 0 | 467 |
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468 cur_func = force_gimple_operand_gsi (&gsi, |
| 111 | 469 build_addr (current_function_decl), |
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470 true, NULL_TREE, |
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471 true, GSI_SAME_STMT); |
| 111 | 472 tree_uid = build_int_cst |
| 473 (gcov_type_node, | |
| 474 cgraph_node::get (current_function_decl)->profile_id); | |
| 475 stmt1 = gimple_build_call (tree_indirect_call_profiler_fn, 2, | |
| 476 tree_uid, cur_func); | |
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477 gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); |
| 0 | 478 } |
| 479 | |
| 111 | 480 /* Output instructions as GIMPLE tree at the beginning for each function. |
| 481 TAG is the tag of the section for counters, BASE is offset of the | |
| 482 counter position and GSI is the iterator we place the counter. */ | |
| 0 | 483 |
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484 void |
| 145 | 485 gimple_gen_time_profiler (unsigned tag) |
| 0 | 486 { |
| 111 | 487 tree type = get_gcov_type (); |
| 488 basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); | |
| 489 basic_block cond_bb = split_edge (single_succ_edge (entry)); | |
| 490 basic_block update_bb = split_edge (single_succ_edge (cond_bb)); | |
| 491 | |
| 492 /* We need to do an extra split in order to not create an input | |
| 493 for a possible PHI node. */ | |
| 494 split_edge (single_succ_edge (update_bb)); | |
| 495 | |
| 496 edge true_edge = single_succ_edge (cond_bb); | |
| 497 true_edge->flags = EDGE_TRUE_VALUE; | |
| 498 true_edge->probability = profile_probability::unlikely (); | |
| 499 edge e | |
| 500 = make_edge (cond_bb, single_succ_edge (update_bb)->dest, EDGE_FALSE_VALUE); | |
| 501 e->probability = true_edge->probability.invert (); | |
| 502 | |
| 503 gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); | |
| 145 | 504 tree original_ref = tree_coverage_counter_ref (tag, 0); |
| 111 | 505 tree ref = force_gimple_operand_gsi (&gsi, original_ref, true, NULL_TREE, |
| 506 true, GSI_SAME_STMT); | |
| 507 tree one = build_int_cst (type, 1); | |
| 508 | |
| 509 /* Emit: if (counters[0] != 0). */ | |
| 510 gcond *cond = gimple_build_cond (EQ_EXPR, ref, build_int_cst (type, 0), | |
| 511 NULL, NULL); | |
| 512 gsi_insert_before (&gsi, cond, GSI_NEW_STMT); | |
| 513 | |
| 514 gsi = gsi_start_bb (update_bb); | |
| 515 | |
| 516 /* Emit: counters[0] = ++__gcov_time_profiler_counter. */ | |
| 517 if (flag_profile_update == PROFILE_UPDATE_ATOMIC) | |
| 518 { | |
| 519 tree ptr = make_temp_ssa_name (build_pointer_type (type), NULL, | |
| 520 "time_profiler_counter_ptr"); | |
| 521 tree addr = build1 (ADDR_EXPR, TREE_TYPE (ptr), | |
| 522 tree_time_profiler_counter); | |
| 523 gassign *assign = gimple_build_assign (ptr, NOP_EXPR, addr); | |
| 524 gsi_insert_before (&gsi, assign, GSI_NEW_STMT); | |
| 525 tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 | |
| 526 ? BUILT_IN_ATOMIC_ADD_FETCH_8: | |
| 527 BUILT_IN_ATOMIC_ADD_FETCH_4); | |
| 528 gcall *stmt = gimple_build_call (f, 3, ptr, one, | |
| 529 build_int_cst (integer_type_node, | |
| 530 MEMMODEL_RELAXED)); | |
| 531 tree result_type = TREE_TYPE (TREE_TYPE (f)); | |
| 532 tree tmp = make_temp_ssa_name (result_type, NULL, "time_profile"); | |
| 533 gimple_set_lhs (stmt, tmp); | |
| 534 gsi_insert_after (&gsi, stmt, GSI_NEW_STMT); | |
| 535 tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 536 assign = gimple_build_assign (tmp, NOP_EXPR, | |
| 537 gimple_call_lhs (stmt)); | |
| 538 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 539 assign = gimple_build_assign (original_ref, tmp); | |
| 540 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 541 } | |
| 542 else | |
| 543 { | |
| 544 tree tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 545 gassign *assign = gimple_build_assign (tmp, tree_time_profiler_counter); | |
| 546 gsi_insert_before (&gsi, assign, GSI_NEW_STMT); | |
| 547 | |
| 548 tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 549 assign = gimple_build_assign (tmp, PLUS_EXPR, gimple_assign_lhs (assign), | |
| 550 one); | |
| 551 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 552 assign = gimple_build_assign (original_ref, tmp); | |
| 553 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 554 assign = gimple_build_assign (tree_time_profiler_counter, tmp); | |
| 555 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 556 } | |
| 0 | 557 } |
| 558 | |
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559 /* Output instructions as GIMPLE trees to increment the average histogram |
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560 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 561 tag of the section for counters, BASE is offset of the counter position. */ |
| 562 | |
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563 void |
| 145 | 564 gimple_gen_average_profiler (histogram_value value, unsigned tag) |
| 0 | 565 { |
| 111 | 566 gimple *stmt = value->hvalue.stmt; |
| 0 | 567 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 145 | 568 tree ref_ptr = tree_coverage_counter_addr (tag, 0); |
| 111 | 569 gcall *call; |
| 0 | 570 tree val; |
|
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571 |
| 0 | 572 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 573 true, NULL_TREE, | |
| 574 true, GSI_SAME_STMT); | |
| 575 val = prepare_instrumented_value (&gsi, value); | |
| 576 call = gimple_build_call (tree_average_profiler_fn, 2, ref_ptr, val); | |
| 577 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 578 } | |
| 579 | |
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580 /* Output instructions as GIMPLE trees to increment the ior histogram |
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581 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 582 tag of the section for counters, BASE is offset of the counter position. */ |
| 583 | |
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584 void |
| 145 | 585 gimple_gen_ior_profiler (histogram_value value, unsigned tag) |
| 0 | 586 { |
| 111 | 587 gimple *stmt = value->hvalue.stmt; |
| 0 | 588 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 145 | 589 tree ref_ptr = tree_coverage_counter_addr (tag, 0); |
| 111 | 590 gcall *call; |
| 0 | 591 tree val; |
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592 |
| 0 | 593 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 594 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 595 val = prepare_instrumented_value (&gsi, value); | |
| 596 call = gimple_build_call (tree_ior_profiler_fn, 2, ref_ptr, val); | |
| 597 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 598 } | |
| 599 | |
| 145 | 600 static vec<regex_t> profile_filter_files; |
| 601 static vec<regex_t> profile_exclude_files; | |
| 602 | |
| 603 /* Parse list of provided REGEX (separated with semi-collon) and | |
| 604 create expressions (of type regex_t) and save them into V vector. | |
| 605 If there is a regular expression parsing error, error message is | |
| 606 printed for FLAG_NAME. */ | |
| 607 | |
| 608 static void | |
| 609 parse_profile_filter (const char *regex, vec<regex_t> *v, | |
| 610 const char *flag_name) | |
| 611 { | |
| 612 v->create (4); | |
| 613 if (regex != NULL) | |
| 614 { | |
| 615 char *str = xstrdup (regex); | |
| 616 for (char *p = strtok (str, ";"); p != NULL; p = strtok (NULL, ";")) | |
| 617 { | |
| 618 regex_t r; | |
| 619 if (regcomp (&r, p, REG_EXTENDED | REG_NOSUB) != 0) | |
| 620 { | |
| 621 error ("invalid regular expression %qs in %qs", | |
| 622 p, flag_name); | |
| 623 return; | |
| 624 } | |
| 625 | |
| 626 v->safe_push (r); | |
| 627 } | |
| 628 } | |
| 629 } | |
| 630 | |
| 631 /* Parse values of -fprofile-filter-files and -fprofile-exclude-files | |
| 632 options. */ | |
| 633 | |
| 634 static void | |
| 635 parse_profile_file_filtering () | |
| 636 { | |
| 637 parse_profile_filter (flag_profile_filter_files, &profile_filter_files, | |
| 638 "-fprofile-filter-files"); | |
| 639 parse_profile_filter (flag_profile_exclude_files, &profile_exclude_files, | |
| 640 "-fprofile-exclude-files"); | |
| 641 } | |
| 642 | |
| 643 /* Parse vectors of regular expressions. */ | |
| 644 | |
| 645 static void | |
| 646 release_profile_file_filtering () | |
| 647 { | |
| 648 profile_filter_files.release (); | |
| 649 profile_exclude_files.release (); | |
| 650 } | |
| 651 | |
| 652 /* Return true when FILENAME should be instrumented based on | |
| 653 -fprofile-filter-files and -fprofile-exclude-files options. */ | |
| 654 | |
| 655 static bool | |
| 656 include_source_file_for_profile (const char *filename) | |
| 657 { | |
| 658 /* First check whether file is included in flag_profile_exclude_files. */ | |
| 659 for (unsigned i = 0; i < profile_exclude_files.length (); i++) | |
| 660 if (regexec (&profile_exclude_files[i], | |
| 661 filename, 0, NULL, 0) == REG_NOERROR) | |
| 662 return false; | |
| 663 | |
| 664 /* For non-empty flag_profile_filter_files include only files matching a | |
| 665 regex in the flag. */ | |
| 666 if (profile_filter_files.is_empty ()) | |
| 667 return true; | |
| 668 | |
| 669 for (unsigned i = 0; i < profile_filter_files.length (); i++) | |
| 670 if (regexec (&profile_filter_files[i], filename, 0, NULL, 0) == REG_NOERROR) | |
| 671 return true; | |
| 672 | |
| 673 return false; | |
| 674 } | |
| 675 | |
| 111 | 676 #ifndef HAVE_sync_compare_and_swapsi |
| 677 #define HAVE_sync_compare_and_swapsi 0 | |
| 678 #endif | |
| 679 #ifndef HAVE_atomic_compare_and_swapsi | |
| 680 #define HAVE_atomic_compare_and_swapsi 0 | |
| 681 #endif | |
| 682 | |
| 683 #ifndef HAVE_sync_compare_and_swapdi | |
| 684 #define HAVE_sync_compare_and_swapdi 0 | |
| 685 #endif | |
| 686 #ifndef HAVE_atomic_compare_and_swapdi | |
| 687 #define HAVE_atomic_compare_and_swapdi 0 | |
| 688 #endif | |
| 689 | |
|
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690 /* Profile all functions in the callgraph. */ |
| 0 | 691 |
| 692 static unsigned int | |
| 693 tree_profiling (void) | |
| 694 { | |
|
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695 struct cgraph_node *node; |
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696 |
| 111 | 697 /* Verify whether we can utilize atomic update operations. */ |
| 698 bool can_support_atomic = false; | |
| 699 unsigned HOST_WIDE_INT gcov_type_size | |
| 700 = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ())); | |
| 701 if (gcov_type_size == 4) | |
| 702 can_support_atomic | |
| 703 = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi; | |
| 704 else if (gcov_type_size == 8) | |
| 705 can_support_atomic | |
| 706 = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi; | |
| 0 | 707 |
| 111 | 708 if (flag_profile_update == PROFILE_UPDATE_ATOMIC |
| 709 && !can_support_atomic) | |
|
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710 { |
| 111 | 711 warning (0, "target does not support atomic profile update, " |
| 712 "single mode is selected"); | |
| 713 flag_profile_update = PROFILE_UPDATE_SINGLE; | |
| 714 } | |
| 715 else if (flag_profile_update == PROFILE_UPDATE_PREFER_ATOMIC) | |
| 716 flag_profile_update = can_support_atomic | |
| 717 ? PROFILE_UPDATE_ATOMIC : PROFILE_UPDATE_SINGLE; | |
| 718 | |
| 719 /* This is a small-ipa pass that gets called only once, from | |
| 720 cgraphunit.c:ipa_passes(). */ | |
| 721 gcc_assert (symtab->state == IPA_SSA); | |
| 722 | |
| 723 init_node_map (true); | |
| 145 | 724 parse_profile_file_filtering (); |
| 111 | 725 |
| 726 FOR_EACH_DEFINED_FUNCTION (node) | |
| 727 { | |
| 145 | 728 bool thunk = false; |
| 729 if (!gimple_has_body_p (node->decl) && !node->thunk.thunk_p) | |
|
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730 continue; |
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731 |
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732 /* Don't profile functions produced for builtin stuff. */ |
| 111 | 733 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
| 734 continue; | |
| 735 | |
| 736 if (lookup_attribute ("no_profile_instrument_function", | |
| 737 DECL_ATTRIBUTES (node->decl))) | |
| 738 continue; | |
| 739 /* Do not instrument extern inline functions when testing coverage. | |
| 740 While this is not perfectly consistent (early inlined extern inlines | |
| 741 will get acocunted), testsuite expects that. */ | |
| 742 if (DECL_EXTERNAL (node->decl) | |
| 743 && flag_test_coverage) | |
|
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744 continue; |
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745 |
| 145 | 746 const char *file = LOCATION_FILE (DECL_SOURCE_LOCATION (node->decl)); |
| 747 if (!include_source_file_for_profile (file)) | |
| 748 continue; | |
| 749 | |
| 750 if (node->thunk.thunk_p) | |
| 751 { | |
| 752 /* We cannot expand variadic thunks to Gimple. */ | |
| 753 if (stdarg_p (TREE_TYPE (node->decl))) | |
| 754 continue; | |
| 755 thunk = true; | |
| 756 /* When generate profile, expand thunk to gimple so it can be | |
| 757 instrumented same way as other functions. */ | |
| 758 if (profile_arc_flag) | |
| 759 node->expand_thunk (false, true); | |
| 760 /* Read cgraph profile but keep function as thunk at profile-use | |
| 761 time. */ | |
| 762 else | |
| 763 { | |
| 764 read_thunk_profile (node); | |
| 765 continue; | |
| 766 } | |
| 767 } | |
| 768 | |
|
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769 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
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770 |
| 131 | 771 if (dump_file) |
| 772 dump_function_header (dump_file, cfun->decl, dump_flags); | |
| 773 | |
| 111 | 774 /* Local pure-const may imply need to fixup the cfg. */ |
| 145 | 775 if (gimple_has_body_p (node->decl) |
| 776 && (execute_fixup_cfg () & TODO_cleanup_cfg)) | |
| 111 | 777 cleanup_tree_cfg (); |
|
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778 |
| 145 | 779 branch_prob (thunk); |
| 0 | 780 |
|
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781 if (! flag_branch_probabilities |
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782 && flag_profile_values) |
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783 gimple_gen_ic_func_profiler (); |
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784 |
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785 if (flag_branch_probabilities |
| 145 | 786 && !thunk |
|
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787 && flag_profile_values |
| 145 | 788 && flag_value_profile_transformations |
| 789 && profile_status_for_fn (cfun) == PROFILE_READ) | |
|
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790 gimple_value_profile_transformations (); |
| 0 | 791 |
|
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792 /* The above could hose dominator info. Currently there is |
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793 none coming in, this is a safety valve. It should be |
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794 easy to adjust it, if and when there is some. */ |
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795 free_dominance_info (CDI_DOMINATORS); |
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796 free_dominance_info (CDI_POST_DOMINATORS); |
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797 pop_cfun (); |
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798 } |
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799 |
| 145 | 800 release_profile_file_filtering (); |
| 801 | |
|
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802 /* Drop pure/const flags from instrumented functions. */ |
| 111 | 803 if (profile_arc_flag || flag_test_coverage) |
| 804 FOR_EACH_DEFINED_FUNCTION (node) | |
| 805 { | |
| 806 if (!gimple_has_body_p (node->decl) | |
| 807 || !(!node->clone_of | |
| 808 || node->decl != node->clone_of->decl)) | |
| 809 continue; | |
| 810 | |
| 811 /* Don't profile functions produced for builtin stuff. */ | |
| 812 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) | |
| 813 continue; | |
| 814 | |
| 815 node->set_const_flag (false, false); | |
| 816 node->set_pure_flag (false, false); | |
| 817 } | |
| 818 | |
| 819 /* Update call statements and rebuild the cgraph. */ | |
| 820 FOR_EACH_DEFINED_FUNCTION (node) | |
|
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821 { |
| 111 | 822 basic_block bb; |
| 823 | |
| 824 if (!gimple_has_body_p (node->decl) | |
| 825 || !(!node->clone_of | |
| 826 || node->decl != node->clone_of->decl)) | |
|
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827 continue; |
| 0 | 828 |
|
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829 /* Don't profile functions produced for builtin stuff. */ |
| 111 | 830 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
|
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831 continue; |
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832 |
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833 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
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834 |
| 111 | 835 FOR_EACH_BB_FN (bb, cfun) |
|
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836 { |
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837 gimple_stmt_iterator gsi; |
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838 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
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839 { |
| 111 | 840 gimple *stmt = gsi_stmt (gsi); |
|
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841 if (is_gimple_call (stmt)) |
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842 update_stmt (stmt); |
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843 } |
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844 } |
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845 |
| 111 | 846 /* re-merge split blocks. */ |
| 847 cleanup_tree_cfg (); | |
|
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848 update_ssa (TODO_update_ssa); |
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849 |
| 111 | 850 cgraph_edge::rebuild_edges (); |
|
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851 |
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852 pop_cfun (); |
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853 } |
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854 |
| 111 | 855 handle_missing_profiles (); |
| 856 | |
| 857 del_node_map (); | |
| 0 | 858 return 0; |
| 859 } | |
| 860 | |
| 111 | 861 namespace { |
| 862 | |
| 863 const pass_data pass_data_ipa_tree_profile = | |
| 864 { | |
| 865 SIMPLE_IPA_PASS, /* type */ | |
| 866 "profile", /* name */ | |
| 867 OPTGROUP_NONE, /* optinfo_flags */ | |
| 868 TV_IPA_PROFILE, /* tv_id */ | |
| 869 0, /* properties_required */ | |
| 870 0, /* properties_provided */ | |
| 871 0, /* properties_destroyed */ | |
| 872 0, /* todo_flags_start */ | |
| 873 TODO_dump_symtab, /* todo_flags_finish */ | |
| 874 }; | |
|
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875 |
| 111 | 876 class pass_ipa_tree_profile : public simple_ipa_opt_pass |
|
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877 { |
| 111 | 878 public: |
| 879 pass_ipa_tree_profile (gcc::context *ctxt) | |
| 880 : simple_ipa_opt_pass (pass_data_ipa_tree_profile, ctxt) | |
| 881 {} | |
| 882 | |
| 883 /* opt_pass methods: */ | |
| 884 virtual bool gate (function *); | |
| 885 virtual unsigned int execute (function *) { return tree_profiling (); } | |
| 886 | |
| 887 }; // class pass_ipa_tree_profile | |
| 888 | |
| 889 bool | |
| 890 pass_ipa_tree_profile::gate (function *) | |
| 891 { | |
| 892 /* When profile instrumentation, use or test coverage shall be performed. | |
| 893 But for AutoFDO, this there is no instrumentation, thus this pass is | |
| 145 | 894 disabled. */ |
| 111 | 895 return (!in_lto_p && !flag_auto_profile |
|
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896 && (flag_branch_probabilities || flag_test_coverage |
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897 || profile_arc_flag)); |
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f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
898 } |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
63
diff
changeset
|
899 |
| 111 | 900 } // anon namespace |
| 901 | |
| 902 simple_ipa_opt_pass * | |
| 903 make_pass_ipa_tree_profile (gcc::context *ctxt) | |
| 0 | 904 { |
| 111 | 905 return new pass_ipa_tree_profile (ctxt); |
| 906 } | |
| 0 | 907 |
| 908 #include "gt-tree-profile.h" |