Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-profile.c @ 144:8f4e72ab4e11
fix segmentation fault caused by nothing next cur_op to end
| author | Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Sun, 23 Dec 2018 21:23:56 +0900 |
| parents | 84e7813d76e9 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Calculate branch probabilities, and basic block execution counts. |
| 131 | 2 Copyright (C) 1990-2018 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 "params.h" | |
| 53 #include "stringpool.h" | |
| 54 #include "attribs.h" | |
| 131 | 55 #include "tree-pretty-print.h" |
| 56 #include "langhooks.h" | |
| 57 #include "stor-layout.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; | |
| 62 static GTY(()) tree tree_one_value_profiler_fn; | |
| 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: | |
| 111 | 76 __thread gcov* __gcov_indirect_call_counters; // pointer to actual counter |
| 77 __thread void* __gcov_indirect_call_callee; // actual callee address | |
| 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, |
| 111 | 103 get_identifier ( |
| 104 (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ? | |
| 131 | 105 "__gcov_indirect_call_topn" : |
| 106 "__gcov_indirect_call")), | |
| 107 tuple_type); | |
| 108 TREE_PUBLIC (ic_tuple_var) = 1; | |
| 109 DECL_ARTIFICIAL (ic_tuple_var) = 1; | |
| 110 DECL_INITIAL (ic_tuple_var) = NULL; | |
| 111 DECL_EXTERNAL (ic_tuple_var) = 1; | |
| 111 | 112 if (targetm.have_tls) |
| 131 | 113 set_decl_tls_model (ic_tuple_var, decl_default_tls_model (tuple_type)); |
| 0 | 114 } |
| 115 | |
| 111 | 116 /* Create the type and function decls for the interface with gcov. */ |
| 117 | |
|
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118 void |
| 111 | 119 gimple_init_gcov_profiler (void) |
| 0 | 120 { |
| 121 tree interval_profiler_fn_type; | |
| 122 tree pow2_profiler_fn_type; | |
| 123 tree one_value_profiler_fn_type; | |
| 124 tree gcov_type_ptr; | |
| 125 tree ic_profiler_fn_type; | |
| 126 tree average_profiler_fn_type; | |
| 111 | 127 const char *profiler_fn_name; |
| 128 const char *fn_name; | |
| 0 | 129 |
| 130 if (!gcov_type_node) | |
| 131 { | |
| 111 | 132 const char *fn_suffix |
| 133 = flag_profile_update == PROFILE_UPDATE_ATOMIC ? "_atomic" : ""; | |
| 134 | |
| 0 | 135 gcov_type_node = get_gcov_type (); |
| 136 gcov_type_ptr = build_pointer_type (gcov_type_node); | |
| 137 | |
| 138 /* void (*) (gcov_type *, gcov_type, int, unsigned) */ | |
| 139 interval_profiler_fn_type | |
| 140 = build_function_type_list (void_type_node, | |
| 141 gcov_type_ptr, gcov_type_node, | |
| 142 integer_type_node, | |
| 143 unsigned_type_node, NULL_TREE); | |
| 111 | 144 fn_name = concat ("__gcov_interval_profiler", fn_suffix, NULL); |
| 145 tree_interval_profiler_fn = build_fn_decl (fn_name, | |
| 146 interval_profiler_fn_type); | |
| 147 free (CONST_CAST (char *, fn_name)); | |
|
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148 TREE_NOTHROW (tree_interval_profiler_fn) = 1; |
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149 DECL_ATTRIBUTES (tree_interval_profiler_fn) |
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150 = tree_cons (get_identifier ("leaf"), NULL, |
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151 DECL_ATTRIBUTES (tree_interval_profiler_fn)); |
| 0 | 152 |
| 153 /* void (*) (gcov_type *, gcov_type) */ | |
| 154 pow2_profiler_fn_type | |
| 155 = build_function_type_list (void_type_node, | |
| 156 gcov_type_ptr, gcov_type_node, | |
| 157 NULL_TREE); | |
| 111 | 158 fn_name = concat ("__gcov_pow2_profiler", fn_suffix, NULL); |
| 159 tree_pow2_profiler_fn = build_fn_decl (fn_name, pow2_profiler_fn_type); | |
| 160 free (CONST_CAST (char *, fn_name)); | |
|
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161 TREE_NOTHROW (tree_pow2_profiler_fn) = 1; |
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162 DECL_ATTRIBUTES (tree_pow2_profiler_fn) |
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163 = tree_cons (get_identifier ("leaf"), NULL, |
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164 DECL_ATTRIBUTES (tree_pow2_profiler_fn)); |
| 0 | 165 |
| 166 /* void (*) (gcov_type *, gcov_type) */ | |
| 167 one_value_profiler_fn_type | |
| 168 = build_function_type_list (void_type_node, | |
| 169 gcov_type_ptr, gcov_type_node, | |
| 170 NULL_TREE); | |
| 111 | 171 fn_name = concat ("__gcov_one_value_profiler", fn_suffix, NULL); |
| 172 tree_one_value_profiler_fn = build_fn_decl (fn_name, | |
| 173 one_value_profiler_fn_type); | |
| 174 free (CONST_CAST (char *, fn_name)); | |
|
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175 TREE_NOTHROW (tree_one_value_profiler_fn) = 1; |
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176 DECL_ATTRIBUTES (tree_one_value_profiler_fn) |
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177 = tree_cons (get_identifier ("leaf"), NULL, |
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178 DECL_ATTRIBUTES (tree_one_value_profiler_fn)); |
| 0 | 179 |
|
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180 init_ic_make_global_vars (); |
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181 |
| 111 | 182 /* void (*) (gcov_type, void *) */ |
| 0 | 183 ic_profiler_fn_type |
| 184 = build_function_type_list (void_type_node, | |
| 111 | 185 gcov_type_node, |
| 131 | 186 ptr_type_node, |
| 111 | 187 NULL_TREE); |
| 188 profiler_fn_name = "__gcov_indirect_call_profiler_v2"; | |
| 189 if (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE)) | |
| 190 profiler_fn_name = "__gcov_indirect_call_topn_profiler"; | |
| 191 | |
| 0 | 192 tree_indirect_call_profiler_fn |
| 111 | 193 = build_fn_decl (profiler_fn_name, ic_profiler_fn_type); |
| 194 | |
|
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195 TREE_NOTHROW (tree_indirect_call_profiler_fn) = 1; |
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196 DECL_ATTRIBUTES (tree_indirect_call_profiler_fn) |
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197 = tree_cons (get_identifier ("leaf"), NULL, |
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198 DECL_ATTRIBUTES (tree_indirect_call_profiler_fn)); |
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199 |
| 111 | 200 tree_time_profiler_counter |
| 201 = build_decl (UNKNOWN_LOCATION, VAR_DECL, | |
| 202 get_identifier ("__gcov_time_profiler_counter"), | |
| 203 get_gcov_type ()); | |
| 204 TREE_PUBLIC (tree_time_profiler_counter) = 1; | |
| 205 DECL_EXTERNAL (tree_time_profiler_counter) = 1; | |
| 206 TREE_STATIC (tree_time_profiler_counter) = 1; | |
| 207 DECL_ARTIFICIAL (tree_time_profiler_counter) = 1; | |
| 208 DECL_INITIAL (tree_time_profiler_counter) = NULL; | |
| 209 | |
| 0 | 210 /* void (*) (gcov_type *, gcov_type) */ |
| 211 average_profiler_fn_type | |
| 212 = build_function_type_list (void_type_node, | |
| 213 gcov_type_ptr, gcov_type_node, NULL_TREE); | |
| 111 | 214 fn_name = concat ("__gcov_average_profiler", fn_suffix, NULL); |
| 215 tree_average_profiler_fn = build_fn_decl (fn_name, | |
| 216 average_profiler_fn_type); | |
| 217 free (CONST_CAST (char *, fn_name)); | |
|
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218 TREE_NOTHROW (tree_average_profiler_fn) = 1; |
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219 DECL_ATTRIBUTES (tree_average_profiler_fn) |
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220 = tree_cons (get_identifier ("leaf"), NULL, |
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221 DECL_ATTRIBUTES (tree_average_profiler_fn)); |
| 111 | 222 fn_name = concat ("__gcov_ior_profiler", fn_suffix, NULL); |
| 223 tree_ior_profiler_fn = build_fn_decl (fn_name, average_profiler_fn_type); | |
| 224 free (CONST_CAST (char *, fn_name)); | |
|
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225 TREE_NOTHROW (tree_ior_profiler_fn) = 1; |
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226 DECL_ATTRIBUTES (tree_ior_profiler_fn) |
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227 = tree_cons (get_identifier ("leaf"), NULL, |
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228 DECL_ATTRIBUTES (tree_ior_profiler_fn)); |
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229 |
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230 /* LTO streamer needs assembler names. Because we create these decls |
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231 late, we need to initialize them by hand. */ |
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232 DECL_ASSEMBLER_NAME (tree_interval_profiler_fn); |
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233 DECL_ASSEMBLER_NAME (tree_pow2_profiler_fn); |
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234 DECL_ASSEMBLER_NAME (tree_one_value_profiler_fn); |
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235 DECL_ASSEMBLER_NAME (tree_indirect_call_profiler_fn); |
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236 DECL_ASSEMBLER_NAME (tree_average_profiler_fn); |
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237 DECL_ASSEMBLER_NAME (tree_ior_profiler_fn); |
| 0 | 238 } |
| 239 } | |
| 240 | |
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241 /* Output instructions as GIMPLE trees to increment the edge |
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242 execution count, and insert them on E. We rely on |
| 0 | 243 gsi_insert_on_edge to preserve the order. */ |
| 244 | |
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245 void |
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246 gimple_gen_edge_profiler (int edgeno, edge e) |
| 0 | 247 { |
| 111 | 248 tree one; |
| 0 | 249 |
| 250 one = build_int_cst (gcov_type_node, 1); | |
| 111 | 251 |
| 252 if (flag_profile_update == PROFILE_UPDATE_ATOMIC) | |
| 253 { | |
| 254 /* __atomic_fetch_add (&counter, 1, MEMMODEL_RELAXED); */ | |
| 255 tree addr = tree_coverage_counter_addr (GCOV_COUNTER_ARCS, edgeno); | |
| 256 tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 | |
| 257 ? BUILT_IN_ATOMIC_FETCH_ADD_8: | |
| 258 BUILT_IN_ATOMIC_FETCH_ADD_4); | |
| 259 gcall *stmt = gimple_build_call (f, 3, addr, one, | |
| 260 build_int_cst (integer_type_node, | |
| 261 MEMMODEL_RELAXED)); | |
| 262 gsi_insert_on_edge (e, stmt); | |
| 263 } | |
| 264 else | |
| 265 { | |
| 266 tree ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno); | |
| 267 tree gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, | |
| 268 NULL, "PROF_edge_counter"); | |
| 269 gassign *stmt1 = gimple_build_assign (gcov_type_tmp_var, ref); | |
| 270 gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, | |
| 271 NULL, "PROF_edge_counter"); | |
| 272 gassign *stmt2 = gimple_build_assign (gcov_type_tmp_var, PLUS_EXPR, | |
| 273 gimple_assign_lhs (stmt1), one); | |
| 274 gassign *stmt3 = gimple_build_assign (unshare_expr (ref), | |
| 275 gimple_assign_lhs (stmt2)); | |
| 276 gsi_insert_on_edge (e, stmt1); | |
| 277 gsi_insert_on_edge (e, stmt2); | |
| 278 gsi_insert_on_edge (e, stmt3); | |
| 279 } | |
| 0 | 280 } |
| 281 | |
| 282 /* Emits code to get VALUE to instrument at GSI, and returns the | |
| 283 variable containing the value. */ | |
| 284 | |
| 285 static tree | |
| 286 prepare_instrumented_value (gimple_stmt_iterator *gsi, histogram_value value) | |
| 287 { | |
| 288 tree val = value->hvalue.value; | |
|
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289 if (POINTER_TYPE_P (TREE_TYPE (val))) |
| 111 | 290 val = fold_convert (build_nonstandard_integer_type |
| 291 (TYPE_PRECISION (TREE_TYPE (val)), 1), val); | |
| 0 | 292 return force_gimple_operand_gsi (gsi, fold_convert (gcov_type_node, val), |
| 293 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 294 } | |
| 295 | |
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296 /* Output instructions as GIMPLE trees to increment the interval histogram |
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297 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 298 tag of the section for counters, BASE is offset of the counter position. */ |
| 299 | |
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300 void |
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301 gimple_gen_interval_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 302 { |
| 111 | 303 gimple *stmt = value->hvalue.stmt; |
| 0 | 304 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 305 tree ref = tree_coverage_counter_ref (tag, base), ref_ptr; | |
| 111 | 306 gcall *call; |
| 0 | 307 tree val; |
| 308 tree start = build_int_cst_type (integer_type_node, | |
| 309 value->hdata.intvl.int_start); | |
| 310 tree steps = build_int_cst_type (unsigned_type_node, | |
| 311 value->hdata.intvl.steps); | |
|
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312 |
| 0 | 313 ref_ptr = force_gimple_operand_gsi (&gsi, |
| 111 | 314 build_addr (ref), |
| 0 | 315 true, NULL_TREE, true, GSI_SAME_STMT); |
| 316 val = prepare_instrumented_value (&gsi, value); | |
| 317 call = gimple_build_call (tree_interval_profiler_fn, 4, | |
| 318 ref_ptr, val, start, steps); | |
| 319 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 320 } | |
| 321 | |
|
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322 /* Output instructions as GIMPLE trees to increment the power of two histogram |
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323 counter. VALUE is the expression whose value is profiled. TAG is the tag |
| 0 | 324 of the section for counters, BASE is offset of the counter position. */ |
| 325 | |
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326 void |
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327 gimple_gen_pow2_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 328 { |
| 111 | 329 gimple *stmt = value->hvalue.stmt; |
| 0 | 330 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 331 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 332 gcall *call; |
| 0 | 333 tree val; |
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334 |
| 0 | 335 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 336 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 337 val = prepare_instrumented_value (&gsi, value); | |
| 338 call = gimple_build_call (tree_pow2_profiler_fn, 2, ref_ptr, val); | |
| 339 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 340 } | |
| 341 | |
| 342 /* Output instructions as GIMPLE trees for code to find the most common value. | |
| 343 VALUE is the expression whose value is profiled. TAG is the tag of the | |
| 344 section for counters, BASE is offset of the counter position. */ | |
| 345 | |
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346 void |
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347 gimple_gen_one_value_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 348 { |
| 111 | 349 gimple *stmt = value->hvalue.stmt; |
| 0 | 350 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 351 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 352 gcall *call; |
| 0 | 353 tree val; |
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354 |
| 0 | 355 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 356 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 357 val = prepare_instrumented_value (&gsi, value); | |
| 358 call = gimple_build_call (tree_one_value_profiler_fn, 2, ref_ptr, val); | |
| 359 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 360 } | |
| 361 | |
| 362 | |
| 363 /* Output instructions as GIMPLE trees for code to find the most | |
|
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364 common called function in indirect call. |
| 0 | 365 VALUE is the call expression whose indirect callee is profiled. |
| 366 TAG is the tag of the section for counters, BASE is offset of the | |
| 367 counter position. */ | |
| 368 | |
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369 void |
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370 gimple_gen_ic_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 371 { |
| 372 tree tmp1; | |
| 111 | 373 gassign *stmt1, *stmt2, *stmt3; |
| 374 gimple *stmt = value->hvalue.stmt; | |
| 0 | 375 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 376 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 377 | |
| 111 | 378 if ( (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) && |
| 379 tag == GCOV_COUNTER_V_INDIR) || | |
| 380 (!PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) && | |
| 381 tag == GCOV_COUNTER_ICALL_TOPNV)) | |
| 382 return; | |
| 383 | |
| 0 | 384 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 385 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 386 | |
| 387 /* Insert code: | |
|
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388 |
| 131 | 389 stmt1: __gcov_indirect_call.counters = get_relevant_counter_ptr (); |
| 111 | 390 stmt2: tmp1 = (void *) (indirect call argument value) |
| 131 | 391 stmt3: __gcov_indirect_call.callee = tmp1; |
| 111 | 392 |
| 393 Example: | |
| 394 f_1 = foo; | |
| 131 | 395 __gcov_indirect_call.counters = &__gcov4.main[0]; |
| 111 | 396 PROF_9 = f_1; |
| 397 __gcov_indirect_call_callee = PROF_9; | |
| 398 _4 = f_1 (); | |
| 0 | 399 */ |
| 400 | |
| 131 | 401 tree gcov_type_ptr = build_pointer_type (get_gcov_type ()); |
| 402 | |
| 403 tree counter_ref = build3 (COMPONENT_REF, gcov_type_ptr, | |
| 404 ic_tuple_var, ic_tuple_counters_field, NULL_TREE); | |
| 405 | |
| 406 stmt1 = gimple_build_assign (counter_ref, ref_ptr); | |
| 407 tmp1 = make_temp_ssa_name (ptr_type_node, NULL, "PROF"); | |
| 0 | 408 stmt2 = gimple_build_assign (tmp1, unshare_expr (value->hvalue.value)); |
| 131 | 409 tree callee_ref = build3 (COMPONENT_REF, ptr_type_node, |
| 410 ic_tuple_var, ic_tuple_callee_field, NULL_TREE); | |
| 411 stmt3 = gimple_build_assign (callee_ref, tmp1); | |
| 0 | 412 |
| 413 gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); | |
| 414 gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT); | |
| 415 gsi_insert_before (&gsi, stmt3, GSI_SAME_STMT); | |
| 416 } | |
| 417 | |
| 418 | |
| 419 /* Output instructions as GIMPLE trees for code to find the most | |
| 420 common called function in indirect call. Insert instructions at the | |
| 421 beginning of every possible called function. | |
| 422 */ | |
| 423 | |
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424 void |
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425 gimple_gen_ic_func_profiler (void) |
| 0 | 426 { |
| 111 | 427 struct cgraph_node * c_node = cgraph_node::get (current_function_decl); |
| 428 gcall *stmt1; | |
| 429 tree tree_uid, cur_func, void0; | |
| 0 | 430 |
| 111 | 431 if (c_node->only_called_directly_p ()) |
| 0 | 432 return; |
|
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433 |
| 111 | 434 gimple_init_gcov_profiler (); |
| 435 | |
| 436 basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); | |
| 437 basic_block cond_bb = split_edge (single_succ_edge (entry)); | |
| 438 basic_block update_bb = split_edge (single_succ_edge (cond_bb)); | |
| 439 | |
| 440 /* We need to do an extra split in order to not create an input | |
| 441 for a possible PHI node. */ | |
| 442 split_edge (single_succ_edge (update_bb)); | |
| 443 | |
| 444 edge true_edge = single_succ_edge (cond_bb); | |
| 445 true_edge->flags = EDGE_TRUE_VALUE; | |
| 446 | |
| 447 profile_probability probability; | |
| 448 if (DECL_VIRTUAL_P (current_function_decl)) | |
| 449 probability = profile_probability::very_likely (); | |
| 450 else | |
| 451 probability = profile_probability::unlikely (); | |
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452 |
| 111 | 453 true_edge->probability = probability; |
| 454 edge e = make_edge (cond_bb, single_succ_edge (update_bb)->dest, | |
| 455 EDGE_FALSE_VALUE); | |
| 456 e->probability = true_edge->probability.invert (); | |
| 457 | |
| 458 /* Insert code: | |
| 459 | |
| 460 if (__gcov_indirect_call_callee != NULL) | |
| 461 __gcov_indirect_call_profiler_v2 (profile_id, ¤t_function_decl); | |
| 462 | |
| 463 The function __gcov_indirect_call_profiler_v2 is responsible for | |
| 464 resetting __gcov_indirect_call_callee to NULL. */ | |
| 465 | |
| 466 gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); | |
| 131 | 467 void0 = build_int_cst (ptr_type_node, 0); |
| 111 | 468 |
| 131 | 469 tree callee_ref = build3 (COMPONENT_REF, ptr_type_node, |
| 470 ic_tuple_var, ic_tuple_callee_field, NULL_TREE); | |
| 471 | |
| 472 tree ref = force_gimple_operand_gsi (&gsi, callee_ref, true, NULL_TREE, | |
| 111 | 473 true, GSI_SAME_STMT); |
| 474 | |
| 475 gcond *cond = gimple_build_cond (NE_EXPR, ref, | |
| 476 void0, NULL, NULL); | |
| 477 gsi_insert_before (&gsi, cond, GSI_NEW_STMT); | |
| 478 | |
| 479 gsi = gsi_after_labels (update_bb); | |
| 0 | 480 |
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481 cur_func = force_gimple_operand_gsi (&gsi, |
| 111 | 482 build_addr (current_function_decl), |
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483 true, NULL_TREE, |
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484 true, GSI_SAME_STMT); |
| 111 | 485 tree_uid = build_int_cst |
| 486 (gcov_type_node, | |
| 487 cgraph_node::get (current_function_decl)->profile_id); | |
| 488 stmt1 = gimple_build_call (tree_indirect_call_profiler_fn, 2, | |
| 489 tree_uid, cur_func); | |
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490 gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); |
| 0 | 491 } |
| 492 | |
| 111 | 493 /* Output instructions as GIMPLE tree at the beginning for each function. |
| 494 TAG is the tag of the section for counters, BASE is offset of the | |
| 495 counter position and GSI is the iterator we place the counter. */ | |
| 0 | 496 |
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497 void |
| 111 | 498 gimple_gen_time_profiler (unsigned tag, unsigned base) |
| 0 | 499 { |
| 111 | 500 tree type = get_gcov_type (); |
| 501 basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); | |
| 502 basic_block cond_bb = split_edge (single_succ_edge (entry)); | |
| 503 basic_block update_bb = split_edge (single_succ_edge (cond_bb)); | |
| 504 | |
| 505 /* We need to do an extra split in order to not create an input | |
| 506 for a possible PHI node. */ | |
| 507 split_edge (single_succ_edge (update_bb)); | |
| 508 | |
| 509 edge true_edge = single_succ_edge (cond_bb); | |
| 510 true_edge->flags = EDGE_TRUE_VALUE; | |
| 511 true_edge->probability = profile_probability::unlikely (); | |
| 512 edge e | |
| 513 = make_edge (cond_bb, single_succ_edge (update_bb)->dest, EDGE_FALSE_VALUE); | |
| 514 e->probability = true_edge->probability.invert (); | |
| 515 | |
| 516 gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); | |
| 517 tree original_ref = tree_coverage_counter_ref (tag, base); | |
| 518 tree ref = force_gimple_operand_gsi (&gsi, original_ref, true, NULL_TREE, | |
| 519 true, GSI_SAME_STMT); | |
| 520 tree one = build_int_cst (type, 1); | |
| 521 | |
| 522 /* Emit: if (counters[0] != 0). */ | |
| 523 gcond *cond = gimple_build_cond (EQ_EXPR, ref, build_int_cst (type, 0), | |
| 524 NULL, NULL); | |
| 525 gsi_insert_before (&gsi, cond, GSI_NEW_STMT); | |
| 526 | |
| 527 gsi = gsi_start_bb (update_bb); | |
| 528 | |
| 529 /* Emit: counters[0] = ++__gcov_time_profiler_counter. */ | |
| 530 if (flag_profile_update == PROFILE_UPDATE_ATOMIC) | |
| 531 { | |
| 532 tree ptr = make_temp_ssa_name (build_pointer_type (type), NULL, | |
| 533 "time_profiler_counter_ptr"); | |
| 534 tree addr = build1 (ADDR_EXPR, TREE_TYPE (ptr), | |
| 535 tree_time_profiler_counter); | |
| 536 gassign *assign = gimple_build_assign (ptr, NOP_EXPR, addr); | |
| 537 gsi_insert_before (&gsi, assign, GSI_NEW_STMT); | |
| 538 tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 | |
| 539 ? BUILT_IN_ATOMIC_ADD_FETCH_8: | |
| 540 BUILT_IN_ATOMIC_ADD_FETCH_4); | |
| 541 gcall *stmt = gimple_build_call (f, 3, ptr, one, | |
| 542 build_int_cst (integer_type_node, | |
| 543 MEMMODEL_RELAXED)); | |
| 544 tree result_type = TREE_TYPE (TREE_TYPE (f)); | |
| 545 tree tmp = make_temp_ssa_name (result_type, NULL, "time_profile"); | |
| 546 gimple_set_lhs (stmt, tmp); | |
| 547 gsi_insert_after (&gsi, stmt, GSI_NEW_STMT); | |
| 548 tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 549 assign = gimple_build_assign (tmp, NOP_EXPR, | |
| 550 gimple_call_lhs (stmt)); | |
| 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 } | |
| 555 else | |
| 556 { | |
| 557 tree tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 558 gassign *assign = gimple_build_assign (tmp, tree_time_profiler_counter); | |
| 559 gsi_insert_before (&gsi, assign, GSI_NEW_STMT); | |
| 560 | |
| 561 tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 562 assign = gimple_build_assign (tmp, PLUS_EXPR, gimple_assign_lhs (assign), | |
| 563 one); | |
| 564 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 565 assign = gimple_build_assign (original_ref, tmp); | |
| 566 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 567 assign = gimple_build_assign (tree_time_profiler_counter, tmp); | |
| 568 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 569 } | |
| 0 | 570 } |
| 571 | |
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572 /* Output instructions as GIMPLE trees to increment the average histogram |
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573 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 574 tag of the section for counters, BASE is offset of the counter position. */ |
| 575 | |
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576 void |
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577 gimple_gen_average_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 578 { |
| 111 | 579 gimple *stmt = value->hvalue.stmt; |
| 0 | 580 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 581 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 582 gcall *call; |
| 0 | 583 tree val; |
|
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584 |
| 0 | 585 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 586 true, NULL_TREE, | |
| 587 true, GSI_SAME_STMT); | |
| 588 val = prepare_instrumented_value (&gsi, value); | |
| 589 call = gimple_build_call (tree_average_profiler_fn, 2, ref_ptr, val); | |
| 590 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 591 } | |
| 592 | |
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593 /* Output instructions as GIMPLE trees to increment the ior histogram |
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594 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 595 tag of the section for counters, BASE is offset of the counter position. */ |
| 596 | |
|
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597 void |
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598 gimple_gen_ior_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 599 { |
| 111 | 600 gimple *stmt = value->hvalue.stmt; |
| 0 | 601 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 602 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 603 gcall *call; |
| 0 | 604 tree val; |
|
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605 |
| 0 | 606 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 607 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 608 val = prepare_instrumented_value (&gsi, value); | |
| 609 call = gimple_build_call (tree_ior_profiler_fn, 2, ref_ptr, val); | |
| 610 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 611 } | |
| 612 | |
| 111 | 613 #ifndef HAVE_sync_compare_and_swapsi |
| 614 #define HAVE_sync_compare_and_swapsi 0 | |
| 615 #endif | |
| 616 #ifndef HAVE_atomic_compare_and_swapsi | |
| 617 #define HAVE_atomic_compare_and_swapsi 0 | |
| 618 #endif | |
| 619 | |
| 620 #ifndef HAVE_sync_compare_and_swapdi | |
| 621 #define HAVE_sync_compare_and_swapdi 0 | |
| 622 #endif | |
| 623 #ifndef HAVE_atomic_compare_and_swapdi | |
| 624 #define HAVE_atomic_compare_and_swapdi 0 | |
| 625 #endif | |
| 626 | |
|
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627 /* Profile all functions in the callgraph. */ |
| 0 | 628 |
| 629 static unsigned int | |
| 630 tree_profiling (void) | |
| 631 { | |
|
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632 struct cgraph_node *node; |
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633 |
| 111 | 634 /* Verify whether we can utilize atomic update operations. */ |
| 635 bool can_support_atomic = false; | |
| 636 unsigned HOST_WIDE_INT gcov_type_size | |
| 637 = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ())); | |
| 638 if (gcov_type_size == 4) | |
| 639 can_support_atomic | |
| 640 = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi; | |
| 641 else if (gcov_type_size == 8) | |
| 642 can_support_atomic | |
| 643 = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi; | |
| 0 | 644 |
| 111 | 645 if (flag_profile_update == PROFILE_UPDATE_ATOMIC |
| 646 && !can_support_atomic) | |
|
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647 { |
| 111 | 648 warning (0, "target does not support atomic profile update, " |
| 649 "single mode is selected"); | |
| 650 flag_profile_update = PROFILE_UPDATE_SINGLE; | |
| 651 } | |
| 652 else if (flag_profile_update == PROFILE_UPDATE_PREFER_ATOMIC) | |
| 653 flag_profile_update = can_support_atomic | |
| 654 ? PROFILE_UPDATE_ATOMIC : PROFILE_UPDATE_SINGLE; | |
| 655 | |
| 656 /* This is a small-ipa pass that gets called only once, from | |
| 657 cgraphunit.c:ipa_passes(). */ | |
| 658 gcc_assert (symtab->state == IPA_SSA); | |
| 659 | |
| 660 init_node_map (true); | |
| 661 | |
| 662 FOR_EACH_DEFINED_FUNCTION (node) | |
| 663 { | |
| 664 if (!gimple_has_body_p (node->decl)) | |
|
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665 continue; |
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666 |
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667 /* Don't profile functions produced for builtin stuff. */ |
| 111 | 668 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
| 669 continue; | |
| 670 | |
| 671 if (lookup_attribute ("no_profile_instrument_function", | |
| 672 DECL_ATTRIBUTES (node->decl))) | |
| 673 continue; | |
| 674 /* Do not instrument extern inline functions when testing coverage. | |
| 675 While this is not perfectly consistent (early inlined extern inlines | |
| 676 will get acocunted), testsuite expects that. */ | |
| 677 if (DECL_EXTERNAL (node->decl) | |
| 678 && flag_test_coverage) | |
|
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679 continue; |
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680 |
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681 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
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682 |
| 131 | 683 if (dump_file) |
| 684 dump_function_header (dump_file, cfun->decl, dump_flags); | |
| 685 | |
| 111 | 686 /* Local pure-const may imply need to fixup the cfg. */ |
| 687 if (execute_fixup_cfg () & TODO_cleanup_cfg) | |
| 688 cleanup_tree_cfg (); | |
|
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689 |
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690 branch_prob (); |
| 0 | 691 |
|
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692 if (! flag_branch_probabilities |
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693 && flag_profile_values) |
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694 gimple_gen_ic_func_profiler (); |
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695 |
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696 if (flag_branch_probabilities |
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697 && flag_profile_values |
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698 && flag_value_profile_transformations) |
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699 gimple_value_profile_transformations (); |
| 0 | 700 |
|
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701 /* The above could hose dominator info. Currently there is |
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702 none coming in, this is a safety valve. It should be |
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703 easy to adjust it, if and when there is some. */ |
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704 free_dominance_info (CDI_DOMINATORS); |
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705 free_dominance_info (CDI_POST_DOMINATORS); |
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706 pop_cfun (); |
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707 } |
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708 |
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709 /* Drop pure/const flags from instrumented functions. */ |
| 111 | 710 if (profile_arc_flag || flag_test_coverage) |
| 711 FOR_EACH_DEFINED_FUNCTION (node) | |
| 712 { | |
| 713 if (!gimple_has_body_p (node->decl) | |
| 714 || !(!node->clone_of | |
| 715 || node->decl != node->clone_of->decl)) | |
| 716 continue; | |
| 717 | |
| 718 /* Don't profile functions produced for builtin stuff. */ | |
| 719 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) | |
| 720 continue; | |
| 721 | |
| 722 node->set_const_flag (false, false); | |
| 723 node->set_pure_flag (false, false); | |
| 724 } | |
| 725 | |
| 726 /* Update call statements and rebuild the cgraph. */ | |
| 727 FOR_EACH_DEFINED_FUNCTION (node) | |
|
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728 { |
| 111 | 729 basic_block bb; |
| 730 | |
| 731 if (!gimple_has_body_p (node->decl) | |
| 732 || !(!node->clone_of | |
| 733 || node->decl != node->clone_of->decl)) | |
|
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734 continue; |
| 0 | 735 |
|
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736 /* Don't profile functions produced for builtin stuff. */ |
| 111 | 737 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
|
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738 continue; |
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739 |
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740 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
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741 |
| 111 | 742 FOR_EACH_BB_FN (bb, cfun) |
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743 { |
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744 gimple_stmt_iterator gsi; |
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745 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
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746 { |
| 111 | 747 gimple *stmt = gsi_stmt (gsi); |
|
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748 if (is_gimple_call (stmt)) |
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749 update_stmt (stmt); |
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750 } |
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751 } |
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752 |
| 111 | 753 /* re-merge split blocks. */ |
| 754 cleanup_tree_cfg (); | |
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755 update_ssa (TODO_update_ssa); |
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756 |
| 111 | 757 cgraph_edge::rebuild_edges (); |
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758 |
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759 pop_cfun (); |
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760 } |
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761 |
| 111 | 762 handle_missing_profiles (); |
| 763 | |
| 764 del_node_map (); | |
| 0 | 765 return 0; |
| 766 } | |
| 767 | |
| 111 | 768 namespace { |
| 769 | |
| 770 const pass_data pass_data_ipa_tree_profile = | |
| 771 { | |
| 772 SIMPLE_IPA_PASS, /* type */ | |
| 773 "profile", /* name */ | |
| 774 OPTGROUP_NONE, /* optinfo_flags */ | |
| 775 TV_IPA_PROFILE, /* tv_id */ | |
| 776 0, /* properties_required */ | |
| 777 0, /* properties_provided */ | |
| 778 0, /* properties_destroyed */ | |
| 779 0, /* todo_flags_start */ | |
| 780 TODO_dump_symtab, /* todo_flags_finish */ | |
| 781 }; | |
|
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782 |
| 111 | 783 class pass_ipa_tree_profile : public simple_ipa_opt_pass |
|
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784 { |
| 111 | 785 public: |
| 786 pass_ipa_tree_profile (gcc::context *ctxt) | |
| 787 : simple_ipa_opt_pass (pass_data_ipa_tree_profile, ctxt) | |
| 788 {} | |
| 789 | |
| 790 /* opt_pass methods: */ | |
| 791 virtual bool gate (function *); | |
| 792 virtual unsigned int execute (function *) { return tree_profiling (); } | |
| 793 | |
| 794 }; // class pass_ipa_tree_profile | |
| 795 | |
| 796 bool | |
| 797 pass_ipa_tree_profile::gate (function *) | |
| 798 { | |
| 799 /* When profile instrumentation, use or test coverage shall be performed. | |
| 800 But for AutoFDO, this there is no instrumentation, thus this pass is | |
| 801 diabled. */ | |
| 802 return (!in_lto_p && !flag_auto_profile | |
|
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803 && (flag_branch_probabilities || flag_test_coverage |
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804 || profile_arc_flag)); |
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805 } |
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806 |
| 111 | 807 } // anon namespace |
| 808 | |
| 809 simple_ipa_opt_pass * | |
| 810 make_pass_ipa_tree_profile (gcc::context *ctxt) | |
| 0 | 811 { |
| 111 | 812 return new pass_ipa_tree_profile (ctxt); |
| 813 } | |
| 0 | 814 |
| 815 #include "gt-tree-profile.h" |