Mercurial > hg > CbC > CbC_gcc
annotate gcc/tree-profile.c @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | f6334be47118 |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* Calculate branch probabilities, and basic block execution counts. |
| 111 | 2 Copyright (C) 1990-2017 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" | |
| 0 | 55 |
| 56 static GTY(()) tree gcov_type_node; | |
| 57 static GTY(()) tree tree_interval_profiler_fn; | |
| 58 static GTY(()) tree tree_pow2_profiler_fn; | |
| 59 static GTY(()) tree tree_one_value_profiler_fn; | |
| 60 static GTY(()) tree tree_indirect_call_profiler_fn; | |
| 61 static GTY(()) tree tree_average_profiler_fn; | |
| 62 static GTY(()) tree tree_ior_profiler_fn; | |
| 111 | 63 static GTY(()) tree tree_time_profiler_counter; |
| 64 | |
| 0 | 65 |
| 66 static GTY(()) tree ic_void_ptr_var; | |
| 67 static GTY(()) tree ic_gcov_type_ptr_var; | |
| 68 static GTY(()) tree ptr_void; | |
| 69 | |
| 70 /* Do initialization work for the edge profiler. */ | |
| 71 | |
| 72 /* Add code: | |
| 111 | 73 __thread gcov* __gcov_indirect_call_counters; // pointer to actual counter |
| 74 __thread void* __gcov_indirect_call_callee; // actual callee address | |
| 75 __thread int __gcov_function_counter; // time profiler function counter | |
| 0 | 76 */ |
| 77 static void | |
|
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78 init_ic_make_global_vars (void) |
| 0 | 79 { |
| 111 | 80 tree gcov_type_ptr; |
| 0 | 81 |
| 82 ptr_void = build_pointer_type (void_type_node); | |
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83 |
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84 ic_void_ptr_var |
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85 = build_decl (UNKNOWN_LOCATION, VAR_DECL, |
| 111 | 86 get_identifier ( |
| 87 (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ? | |
| 88 "__gcov_indirect_call_topn_callee" : | |
| 89 "__gcov_indirect_call_callee")), | |
| 0 | 90 ptr_void); |
| 111 | 91 TREE_PUBLIC (ic_void_ptr_var) = 1; |
| 92 DECL_EXTERNAL (ic_void_ptr_var) = 1; | |
| 0 | 93 TREE_STATIC (ic_void_ptr_var) = 1; |
| 94 DECL_ARTIFICIAL (ic_void_ptr_var) = 1; | |
| 95 DECL_INITIAL (ic_void_ptr_var) = NULL; | |
| 111 | 96 if (targetm.have_tls) |
| 97 set_decl_tls_model (ic_void_ptr_var, decl_default_tls_model (ic_void_ptr_var)); | |
| 0 | 98 |
| 99 gcov_type_ptr = build_pointer_type (get_gcov_type ()); | |
| 111 | 100 |
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101 ic_gcov_type_ptr_var |
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102 = build_decl (UNKNOWN_LOCATION, VAR_DECL, |
| 111 | 103 get_identifier ( |
| 104 (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ? | |
| 105 "__gcov_indirect_call_topn_counters" : | |
| 106 "__gcov_indirect_call_counters")), | |
| 0 | 107 gcov_type_ptr); |
| 111 | 108 TREE_PUBLIC (ic_gcov_type_ptr_var) = 1; |
| 109 DECL_EXTERNAL (ic_gcov_type_ptr_var) = 1; | |
| 0 | 110 TREE_STATIC (ic_gcov_type_ptr_var) = 1; |
| 111 DECL_ARTIFICIAL (ic_gcov_type_ptr_var) = 1; | |
| 112 DECL_INITIAL (ic_gcov_type_ptr_var) = NULL; | |
| 111 | 113 if (targetm.have_tls) |
| 114 set_decl_tls_model (ic_gcov_type_ptr_var, decl_default_tls_model (ic_gcov_type_ptr_var)); | |
| 0 | 115 } |
| 116 | |
| 111 | 117 /* Create the type and function decls for the interface with gcov. */ |
| 118 | |
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119 void |
| 111 | 120 gimple_init_gcov_profiler (void) |
| 0 | 121 { |
| 122 tree interval_profiler_fn_type; | |
| 123 tree pow2_profiler_fn_type; | |
| 124 tree one_value_profiler_fn_type; | |
| 125 tree gcov_type_ptr; | |
| 126 tree ic_profiler_fn_type; | |
| 127 tree average_profiler_fn_type; | |
| 111 | 128 const char *profiler_fn_name; |
| 129 const char *fn_name; | |
| 0 | 130 |
| 131 if (!gcov_type_node) | |
| 132 { | |
| 111 | 133 const char *fn_suffix |
| 134 = flag_profile_update == PROFILE_UPDATE_ATOMIC ? "_atomic" : ""; | |
| 135 | |
| 0 | 136 gcov_type_node = get_gcov_type (); |
| 137 gcov_type_ptr = build_pointer_type (gcov_type_node); | |
| 138 | |
| 139 /* void (*) (gcov_type *, gcov_type, int, unsigned) */ | |
| 140 interval_profiler_fn_type | |
| 141 = build_function_type_list (void_type_node, | |
| 142 gcov_type_ptr, gcov_type_node, | |
| 143 integer_type_node, | |
| 144 unsigned_type_node, NULL_TREE); | |
| 111 | 145 fn_name = concat ("__gcov_interval_profiler", fn_suffix, NULL); |
| 146 tree_interval_profiler_fn = build_fn_decl (fn_name, | |
| 147 interval_profiler_fn_type); | |
| 148 free (CONST_CAST (char *, fn_name)); | |
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149 TREE_NOTHROW (tree_interval_profiler_fn) = 1; |
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150 DECL_ATTRIBUTES (tree_interval_profiler_fn) |
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151 = tree_cons (get_identifier ("leaf"), NULL, |
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152 DECL_ATTRIBUTES (tree_interval_profiler_fn)); |
| 0 | 153 |
| 154 /* void (*) (gcov_type *, gcov_type) */ | |
| 155 pow2_profiler_fn_type | |
| 156 = build_function_type_list (void_type_node, | |
| 157 gcov_type_ptr, gcov_type_node, | |
| 158 NULL_TREE); | |
| 111 | 159 fn_name = concat ("__gcov_pow2_profiler", fn_suffix, NULL); |
| 160 tree_pow2_profiler_fn = build_fn_decl (fn_name, pow2_profiler_fn_type); | |
| 161 free (CONST_CAST (char *, fn_name)); | |
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162 TREE_NOTHROW (tree_pow2_profiler_fn) = 1; |
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163 DECL_ATTRIBUTES (tree_pow2_profiler_fn) |
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164 = tree_cons (get_identifier ("leaf"), NULL, |
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165 DECL_ATTRIBUTES (tree_pow2_profiler_fn)); |
| 0 | 166 |
| 167 /* void (*) (gcov_type *, gcov_type) */ | |
| 168 one_value_profiler_fn_type | |
| 169 = build_function_type_list (void_type_node, | |
| 170 gcov_type_ptr, gcov_type_node, | |
| 171 NULL_TREE); | |
| 111 | 172 fn_name = concat ("__gcov_one_value_profiler", fn_suffix, NULL); |
| 173 tree_one_value_profiler_fn = build_fn_decl (fn_name, | |
| 174 one_value_profiler_fn_type); | |
| 175 free (CONST_CAST (char *, fn_name)); | |
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176 TREE_NOTHROW (tree_one_value_profiler_fn) = 1; |
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177 DECL_ATTRIBUTES (tree_one_value_profiler_fn) |
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178 = tree_cons (get_identifier ("leaf"), NULL, |
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179 DECL_ATTRIBUTES (tree_one_value_profiler_fn)); |
| 0 | 180 |
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181 init_ic_make_global_vars (); |
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182 |
| 111 | 183 /* void (*) (gcov_type, void *) */ |
| 0 | 184 ic_profiler_fn_type |
| 185 = build_function_type_list (void_type_node, | |
| 111 | 186 gcov_type_node, |
| 0 | 187 ptr_void, |
| 111 | 188 NULL_TREE); |
| 189 profiler_fn_name = "__gcov_indirect_call_profiler_v2"; | |
| 190 if (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE)) | |
| 191 profiler_fn_name = "__gcov_indirect_call_topn_profiler"; | |
| 192 | |
| 0 | 193 tree_indirect_call_profiler_fn |
| 111 | 194 = build_fn_decl (profiler_fn_name, ic_profiler_fn_type); |
| 195 | |
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196 TREE_NOTHROW (tree_indirect_call_profiler_fn) = 1; |
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197 DECL_ATTRIBUTES (tree_indirect_call_profiler_fn) |
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198 = tree_cons (get_identifier ("leaf"), NULL, |
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199 DECL_ATTRIBUTES (tree_indirect_call_profiler_fn)); |
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200 |
| 111 | 201 tree_time_profiler_counter |
| 202 = build_decl (UNKNOWN_LOCATION, VAR_DECL, | |
| 203 get_identifier ("__gcov_time_profiler_counter"), | |
| 204 get_gcov_type ()); | |
| 205 TREE_PUBLIC (tree_time_profiler_counter) = 1; | |
| 206 DECL_EXTERNAL (tree_time_profiler_counter) = 1; | |
| 207 TREE_STATIC (tree_time_profiler_counter) = 1; | |
| 208 DECL_ARTIFICIAL (tree_time_profiler_counter) = 1; | |
| 209 DECL_INITIAL (tree_time_profiler_counter) = NULL; | |
| 210 | |
| 0 | 211 /* void (*) (gcov_type *, gcov_type) */ |
| 212 average_profiler_fn_type | |
| 213 = build_function_type_list (void_type_node, | |
| 214 gcov_type_ptr, gcov_type_node, NULL_TREE); | |
| 111 | 215 fn_name = concat ("__gcov_average_profiler", fn_suffix, NULL); |
| 216 tree_average_profiler_fn = build_fn_decl (fn_name, | |
| 217 average_profiler_fn_type); | |
| 218 free (CONST_CAST (char *, fn_name)); | |
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219 TREE_NOTHROW (tree_average_profiler_fn) = 1; |
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220 DECL_ATTRIBUTES (tree_average_profiler_fn) |
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221 = tree_cons (get_identifier ("leaf"), NULL, |
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222 DECL_ATTRIBUTES (tree_average_profiler_fn)); |
| 111 | 223 fn_name = concat ("__gcov_ior_profiler", fn_suffix, NULL); |
| 224 tree_ior_profiler_fn = build_fn_decl (fn_name, average_profiler_fn_type); | |
| 225 free (CONST_CAST (char *, fn_name)); | |
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226 TREE_NOTHROW (tree_ior_profiler_fn) = 1; |
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227 DECL_ATTRIBUTES (tree_ior_profiler_fn) |
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228 = tree_cons (get_identifier ("leaf"), NULL, |
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229 DECL_ATTRIBUTES (tree_ior_profiler_fn)); |
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230 |
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231 /* LTO streamer needs assembler names. Because we create these decls |
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232 late, we need to initialize them by hand. */ |
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233 DECL_ASSEMBLER_NAME (tree_interval_profiler_fn); |
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234 DECL_ASSEMBLER_NAME (tree_pow2_profiler_fn); |
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235 DECL_ASSEMBLER_NAME (tree_one_value_profiler_fn); |
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236 DECL_ASSEMBLER_NAME (tree_indirect_call_profiler_fn); |
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237 DECL_ASSEMBLER_NAME (tree_average_profiler_fn); |
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238 DECL_ASSEMBLER_NAME (tree_ior_profiler_fn); |
| 0 | 239 } |
| 240 } | |
| 241 | |
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242 /* Output instructions as GIMPLE trees to increment the edge |
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243 execution count, and insert them on E. We rely on |
| 0 | 244 gsi_insert_on_edge to preserve the order. */ |
| 245 | |
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246 void |
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247 gimple_gen_edge_profiler (int edgeno, edge e) |
| 0 | 248 { |
| 111 | 249 tree one; |
| 0 | 250 |
| 251 one = build_int_cst (gcov_type_node, 1); | |
| 111 | 252 |
| 253 if (flag_profile_update == PROFILE_UPDATE_ATOMIC) | |
| 254 { | |
| 255 /* __atomic_fetch_add (&counter, 1, MEMMODEL_RELAXED); */ | |
| 256 tree addr = tree_coverage_counter_addr (GCOV_COUNTER_ARCS, edgeno); | |
| 257 tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 | |
| 258 ? BUILT_IN_ATOMIC_FETCH_ADD_8: | |
| 259 BUILT_IN_ATOMIC_FETCH_ADD_4); | |
| 260 gcall *stmt = gimple_build_call (f, 3, addr, one, | |
| 261 build_int_cst (integer_type_node, | |
| 262 MEMMODEL_RELAXED)); | |
| 263 gsi_insert_on_edge (e, stmt); | |
| 264 } | |
| 265 else | |
| 266 { | |
| 267 tree ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno); | |
| 268 tree gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, | |
| 269 NULL, "PROF_edge_counter"); | |
| 270 gassign *stmt1 = gimple_build_assign (gcov_type_tmp_var, ref); | |
| 271 gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, | |
| 272 NULL, "PROF_edge_counter"); | |
| 273 gassign *stmt2 = gimple_build_assign (gcov_type_tmp_var, PLUS_EXPR, | |
| 274 gimple_assign_lhs (stmt1), one); | |
| 275 gassign *stmt3 = gimple_build_assign (unshare_expr (ref), | |
| 276 gimple_assign_lhs (stmt2)); | |
| 277 gsi_insert_on_edge (e, stmt1); | |
| 278 gsi_insert_on_edge (e, stmt2); | |
| 279 gsi_insert_on_edge (e, stmt3); | |
| 280 } | |
| 0 | 281 } |
| 282 | |
| 283 /* Emits code to get VALUE to instrument at GSI, and returns the | |
| 284 variable containing the value. */ | |
| 285 | |
| 286 static tree | |
| 287 prepare_instrumented_value (gimple_stmt_iterator *gsi, histogram_value value) | |
| 288 { | |
| 289 tree val = value->hvalue.value; | |
|
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290 if (POINTER_TYPE_P (TREE_TYPE (val))) |
| 111 | 291 val = fold_convert (build_nonstandard_integer_type |
| 292 (TYPE_PRECISION (TREE_TYPE (val)), 1), val); | |
| 0 | 293 return force_gimple_operand_gsi (gsi, fold_convert (gcov_type_node, val), |
| 294 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 295 } | |
| 296 | |
|
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297 /* Output instructions as GIMPLE trees to increment the interval histogram |
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298 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 299 tag of the section for counters, BASE is offset of the counter position. */ |
| 300 | |
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301 void |
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302 gimple_gen_interval_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 303 { |
| 111 | 304 gimple *stmt = value->hvalue.stmt; |
| 0 | 305 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 306 tree ref = tree_coverage_counter_ref (tag, base), ref_ptr; | |
| 111 | 307 gcall *call; |
| 0 | 308 tree val; |
| 309 tree start = build_int_cst_type (integer_type_node, | |
| 310 value->hdata.intvl.int_start); | |
| 311 tree steps = build_int_cst_type (unsigned_type_node, | |
| 312 value->hdata.intvl.steps); | |
|
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313 |
| 0 | 314 ref_ptr = force_gimple_operand_gsi (&gsi, |
| 111 | 315 build_addr (ref), |
| 0 | 316 true, NULL_TREE, true, GSI_SAME_STMT); |
| 317 val = prepare_instrumented_value (&gsi, value); | |
| 318 call = gimple_build_call (tree_interval_profiler_fn, 4, | |
| 319 ref_ptr, val, start, steps); | |
| 320 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 321 } | |
| 322 | |
|
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323 /* Output instructions as GIMPLE trees to increment the power of two histogram |
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324 counter. VALUE is the expression whose value is profiled. TAG is the tag |
| 0 | 325 of the section for counters, BASE is offset of the counter position. */ |
| 326 | |
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327 void |
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328 gimple_gen_pow2_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 329 { |
| 111 | 330 gimple *stmt = value->hvalue.stmt; |
| 0 | 331 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 332 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 333 gcall *call; |
| 0 | 334 tree val; |
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335 |
| 0 | 336 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 337 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 338 val = prepare_instrumented_value (&gsi, value); | |
| 339 call = gimple_build_call (tree_pow2_profiler_fn, 2, ref_ptr, val); | |
| 340 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 341 } | |
| 342 | |
| 343 /* Output instructions as GIMPLE trees for code to find the most common value. | |
| 344 VALUE is the expression whose value is profiled. TAG is the tag of the | |
| 345 section for counters, BASE is offset of the counter position. */ | |
| 346 | |
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347 void |
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348 gimple_gen_one_value_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 349 { |
| 111 | 350 gimple *stmt = value->hvalue.stmt; |
| 0 | 351 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 352 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 353 gcall *call; |
| 0 | 354 tree val; |
|
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355 |
| 0 | 356 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 357 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 358 val = prepare_instrumented_value (&gsi, value); | |
| 359 call = gimple_build_call (tree_one_value_profiler_fn, 2, ref_ptr, val); | |
| 360 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 361 } | |
| 362 | |
| 363 | |
| 364 /* Output instructions as GIMPLE trees for code to find the most | |
|
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365 common called function in indirect call. |
| 0 | 366 VALUE is the call expression whose indirect callee is profiled. |
| 367 TAG is the tag of the section for counters, BASE is offset of the | |
| 368 counter position. */ | |
| 369 | |
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370 void |
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371 gimple_gen_ic_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 372 { |
| 373 tree tmp1; | |
| 111 | 374 gassign *stmt1, *stmt2, *stmt3; |
| 375 gimple *stmt = value->hvalue.stmt; | |
| 0 | 376 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 377 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 378 | |
| 111 | 379 if ( (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) && |
| 380 tag == GCOV_COUNTER_V_INDIR) || | |
| 381 (!PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) && | |
| 382 tag == GCOV_COUNTER_ICALL_TOPNV)) | |
| 383 return; | |
| 384 | |
| 0 | 385 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 386 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 387 | |
| 388 /* Insert code: | |
|
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389 |
| 111 | 390 stmt1: __gcov_indirect_call_counters = get_relevant_counter_ptr (); |
| 391 stmt2: tmp1 = (void *) (indirect call argument value) | |
| 392 stmt3: __gcov_indirect_call_callee = tmp1; | |
| 393 | |
| 394 Example: | |
| 395 f_1 = foo; | |
| 396 __gcov_indirect_call_counters = &__gcov4.main[0]; | |
| 397 PROF_9 = f_1; | |
| 398 __gcov_indirect_call_callee = PROF_9; | |
| 399 _4 = f_1 (); | |
| 0 | 400 */ |
| 401 | |
| 402 stmt1 = gimple_build_assign (ic_gcov_type_ptr_var, ref_ptr); | |
| 111 | 403 tmp1 = make_temp_ssa_name (ptr_void, NULL, "PROF"); |
| 0 | 404 stmt2 = gimple_build_assign (tmp1, unshare_expr (value->hvalue.value)); |
|
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405 stmt3 = gimple_build_assign (ic_void_ptr_var, gimple_assign_lhs (stmt2)); |
| 0 | 406 |
| 407 gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); | |
| 408 gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT); | |
| 409 gsi_insert_before (&gsi, stmt3, GSI_SAME_STMT); | |
| 410 } | |
| 411 | |
| 412 | |
| 413 /* Output instructions as GIMPLE trees for code to find the most | |
| 414 common called function in indirect call. Insert instructions at the | |
| 415 beginning of every possible called function. | |
| 416 */ | |
| 417 | |
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418 void |
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419 gimple_gen_ic_func_profiler (void) |
| 0 | 420 { |
| 111 | 421 struct cgraph_node * c_node = cgraph_node::get (current_function_decl); |
| 422 gcall *stmt1; | |
| 423 tree tree_uid, cur_func, void0; | |
| 0 | 424 |
| 111 | 425 if (c_node->only_called_directly_p ()) |
| 0 | 426 return; |
|
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427 |
| 111 | 428 gimple_init_gcov_profiler (); |
| 429 | |
| 430 basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); | |
| 431 basic_block cond_bb = split_edge (single_succ_edge (entry)); | |
| 432 basic_block update_bb = split_edge (single_succ_edge (cond_bb)); | |
| 433 | |
| 434 /* We need to do an extra split in order to not create an input | |
| 435 for a possible PHI node. */ | |
| 436 split_edge (single_succ_edge (update_bb)); | |
| 437 | |
| 438 edge true_edge = single_succ_edge (cond_bb); | |
| 439 true_edge->flags = EDGE_TRUE_VALUE; | |
| 440 | |
| 441 profile_probability probability; | |
| 442 if (DECL_VIRTUAL_P (current_function_decl)) | |
| 443 probability = profile_probability::very_likely (); | |
| 444 else | |
| 445 probability = profile_probability::unlikely (); | |
|
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446 |
| 111 | 447 true_edge->probability = probability; |
| 448 edge e = make_edge (cond_bb, single_succ_edge (update_bb)->dest, | |
| 449 EDGE_FALSE_VALUE); | |
| 450 e->probability = true_edge->probability.invert (); | |
| 451 | |
| 452 /* Insert code: | |
| 453 | |
| 454 if (__gcov_indirect_call_callee != NULL) | |
| 455 __gcov_indirect_call_profiler_v2 (profile_id, ¤t_function_decl); | |
| 456 | |
| 457 The function __gcov_indirect_call_profiler_v2 is responsible for | |
| 458 resetting __gcov_indirect_call_callee to NULL. */ | |
| 459 | |
| 460 gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); | |
| 461 void0 = build_int_cst (build_pointer_type (void_type_node), 0); | |
| 462 | |
| 463 tree ref = force_gimple_operand_gsi (&gsi, ic_void_ptr_var, true, NULL_TREE, | |
| 464 true, GSI_SAME_STMT); | |
| 465 | |
| 466 gcond *cond = gimple_build_cond (NE_EXPR, ref, | |
| 467 void0, NULL, NULL); | |
| 468 gsi_insert_before (&gsi, cond, GSI_NEW_STMT); | |
| 469 | |
| 470 gsi = gsi_after_labels (update_bb); | |
| 0 | 471 |
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472 cur_func = force_gimple_operand_gsi (&gsi, |
| 111 | 473 build_addr (current_function_decl), |
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474 true, NULL_TREE, |
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475 true, GSI_SAME_STMT); |
| 111 | 476 tree_uid = build_int_cst |
| 477 (gcov_type_node, | |
| 478 cgraph_node::get (current_function_decl)->profile_id); | |
| 479 stmt1 = gimple_build_call (tree_indirect_call_profiler_fn, 2, | |
| 480 tree_uid, cur_func); | |
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481 gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); |
| 0 | 482 } |
| 483 | |
| 111 | 484 /* Output instructions as GIMPLE tree at the beginning for each function. |
| 485 TAG is the tag of the section for counters, BASE is offset of the | |
| 486 counter position and GSI is the iterator we place the counter. */ | |
| 0 | 487 |
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488 void |
| 111 | 489 gimple_gen_time_profiler (unsigned tag, unsigned base) |
| 0 | 490 { |
| 111 | 491 tree type = get_gcov_type (); |
| 492 basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); | |
| 493 basic_block cond_bb = split_edge (single_succ_edge (entry)); | |
| 494 basic_block update_bb = split_edge (single_succ_edge (cond_bb)); | |
| 495 | |
| 496 /* We need to do an extra split in order to not create an input | |
| 497 for a possible PHI node. */ | |
| 498 split_edge (single_succ_edge (update_bb)); | |
| 499 | |
| 500 edge true_edge = single_succ_edge (cond_bb); | |
| 501 true_edge->flags = EDGE_TRUE_VALUE; | |
| 502 true_edge->probability = profile_probability::unlikely (); | |
| 503 edge e | |
| 504 = make_edge (cond_bb, single_succ_edge (update_bb)->dest, EDGE_FALSE_VALUE); | |
| 505 e->probability = true_edge->probability.invert (); | |
| 506 | |
| 507 gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); | |
| 508 tree original_ref = tree_coverage_counter_ref (tag, base); | |
| 509 tree ref = force_gimple_operand_gsi (&gsi, original_ref, true, NULL_TREE, | |
| 510 true, GSI_SAME_STMT); | |
| 511 tree one = build_int_cst (type, 1); | |
| 512 | |
| 513 /* Emit: if (counters[0] != 0). */ | |
| 514 gcond *cond = gimple_build_cond (EQ_EXPR, ref, build_int_cst (type, 0), | |
| 515 NULL, NULL); | |
| 516 gsi_insert_before (&gsi, cond, GSI_NEW_STMT); | |
| 517 | |
| 518 gsi = gsi_start_bb (update_bb); | |
| 519 | |
| 520 /* Emit: counters[0] = ++__gcov_time_profiler_counter. */ | |
| 521 if (flag_profile_update == PROFILE_UPDATE_ATOMIC) | |
| 522 { | |
| 523 tree ptr = make_temp_ssa_name (build_pointer_type (type), NULL, | |
| 524 "time_profiler_counter_ptr"); | |
| 525 tree addr = build1 (ADDR_EXPR, TREE_TYPE (ptr), | |
| 526 tree_time_profiler_counter); | |
| 527 gassign *assign = gimple_build_assign (ptr, NOP_EXPR, addr); | |
| 528 gsi_insert_before (&gsi, assign, GSI_NEW_STMT); | |
| 529 tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 | |
| 530 ? BUILT_IN_ATOMIC_ADD_FETCH_8: | |
| 531 BUILT_IN_ATOMIC_ADD_FETCH_4); | |
| 532 gcall *stmt = gimple_build_call (f, 3, ptr, one, | |
| 533 build_int_cst (integer_type_node, | |
| 534 MEMMODEL_RELAXED)); | |
| 535 tree result_type = TREE_TYPE (TREE_TYPE (f)); | |
| 536 tree tmp = make_temp_ssa_name (result_type, NULL, "time_profile"); | |
| 537 gimple_set_lhs (stmt, tmp); | |
| 538 gsi_insert_after (&gsi, stmt, GSI_NEW_STMT); | |
| 539 tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 540 assign = gimple_build_assign (tmp, NOP_EXPR, | |
| 541 gimple_call_lhs (stmt)); | |
| 542 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 543 assign = gimple_build_assign (original_ref, tmp); | |
| 544 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 545 } | |
| 546 else | |
| 547 { | |
| 548 tree tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 549 gassign *assign = gimple_build_assign (tmp, tree_time_profiler_counter); | |
| 550 gsi_insert_before (&gsi, assign, GSI_NEW_STMT); | |
| 551 | |
| 552 tmp = make_temp_ssa_name (type, NULL, "time_profile"); | |
| 553 assign = gimple_build_assign (tmp, PLUS_EXPR, gimple_assign_lhs (assign), | |
| 554 one); | |
| 555 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 556 assign = gimple_build_assign (original_ref, tmp); | |
| 557 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 558 assign = gimple_build_assign (tree_time_profiler_counter, tmp); | |
| 559 gsi_insert_after (&gsi, assign, GSI_NEW_STMT); | |
| 560 } | |
| 0 | 561 } |
| 562 | |
|
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563 /* Output instructions as GIMPLE trees to increment the average histogram |
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564 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 565 tag of the section for counters, BASE is offset of the counter position. */ |
| 566 | |
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567 void |
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568 gimple_gen_average_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 569 { |
| 111 | 570 gimple *stmt = value->hvalue.stmt; |
| 0 | 571 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 572 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 573 gcall *call; |
| 0 | 574 tree val; |
|
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575 |
| 0 | 576 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 577 true, NULL_TREE, | |
| 578 true, GSI_SAME_STMT); | |
| 579 val = prepare_instrumented_value (&gsi, value); | |
| 580 call = gimple_build_call (tree_average_profiler_fn, 2, ref_ptr, val); | |
| 581 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 582 } | |
| 583 | |
|
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584 /* Output instructions as GIMPLE trees to increment the ior histogram |
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585 counter. VALUE is the expression whose value is profiled. TAG is the |
| 0 | 586 tag of the section for counters, BASE is offset of the counter position. */ |
| 587 | |
|
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588 void |
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589 gimple_gen_ior_profiler (histogram_value value, unsigned tag, unsigned base) |
| 0 | 590 { |
| 111 | 591 gimple *stmt = value->hvalue.stmt; |
| 0 | 592 gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| 593 tree ref_ptr = tree_coverage_counter_addr (tag, base); | |
| 111 | 594 gcall *call; |
| 0 | 595 tree val; |
|
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596 |
| 0 | 597 ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| 598 true, NULL_TREE, true, GSI_SAME_STMT); | |
| 599 val = prepare_instrumented_value (&gsi, value); | |
| 600 call = gimple_build_call (tree_ior_profiler_fn, 2, ref_ptr, val); | |
| 601 gsi_insert_before (&gsi, call, GSI_NEW_STMT); | |
| 602 } | |
| 603 | |
| 111 | 604 #ifndef HAVE_sync_compare_and_swapsi |
| 605 #define HAVE_sync_compare_and_swapsi 0 | |
| 606 #endif | |
| 607 #ifndef HAVE_atomic_compare_and_swapsi | |
| 608 #define HAVE_atomic_compare_and_swapsi 0 | |
| 609 #endif | |
| 610 | |
| 611 #ifndef HAVE_sync_compare_and_swapdi | |
| 612 #define HAVE_sync_compare_and_swapdi 0 | |
| 613 #endif | |
| 614 #ifndef HAVE_atomic_compare_and_swapdi | |
| 615 #define HAVE_atomic_compare_and_swapdi 0 | |
| 616 #endif | |
| 617 | |
|
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618 /* Profile all functions in the callgraph. */ |
| 0 | 619 |
| 620 static unsigned int | |
| 621 tree_profiling (void) | |
| 622 { | |
|
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623 struct cgraph_node *node; |
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624 |
| 111 | 625 /* Verify whether we can utilize atomic update operations. */ |
| 626 bool can_support_atomic = false; | |
| 627 unsigned HOST_WIDE_INT gcov_type_size | |
| 628 = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ())); | |
| 629 if (gcov_type_size == 4) | |
| 630 can_support_atomic | |
| 631 = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi; | |
| 632 else if (gcov_type_size == 8) | |
| 633 can_support_atomic | |
| 634 = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi; | |
| 0 | 635 |
| 111 | 636 if (flag_profile_update == PROFILE_UPDATE_ATOMIC |
| 637 && !can_support_atomic) | |
|
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638 { |
| 111 | 639 warning (0, "target does not support atomic profile update, " |
| 640 "single mode is selected"); | |
| 641 flag_profile_update = PROFILE_UPDATE_SINGLE; | |
| 642 } | |
| 643 else if (flag_profile_update == PROFILE_UPDATE_PREFER_ATOMIC) | |
| 644 flag_profile_update = can_support_atomic | |
| 645 ? PROFILE_UPDATE_ATOMIC : PROFILE_UPDATE_SINGLE; | |
| 646 | |
| 647 /* This is a small-ipa pass that gets called only once, from | |
| 648 cgraphunit.c:ipa_passes(). */ | |
| 649 gcc_assert (symtab->state == IPA_SSA); | |
| 650 | |
| 651 init_node_map (true); | |
| 652 | |
| 653 FOR_EACH_DEFINED_FUNCTION (node) | |
| 654 { | |
| 655 if (!gimple_has_body_p (node->decl)) | |
|
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656 continue; |
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657 |
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658 /* Don't profile functions produced for builtin stuff. */ |
| 111 | 659 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
| 660 continue; | |
| 661 | |
| 662 if (lookup_attribute ("no_profile_instrument_function", | |
| 663 DECL_ATTRIBUTES (node->decl))) | |
| 664 continue; | |
| 665 /* Do not instrument extern inline functions when testing coverage. | |
| 666 While this is not perfectly consistent (early inlined extern inlines | |
| 667 will get acocunted), testsuite expects that. */ | |
| 668 if (DECL_EXTERNAL (node->decl) | |
| 669 && flag_test_coverage) | |
|
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670 continue; |
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671 |
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672 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
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673 |
| 111 | 674 /* Local pure-const may imply need to fixup the cfg. */ |
| 675 if (execute_fixup_cfg () & TODO_cleanup_cfg) | |
| 676 cleanup_tree_cfg (); | |
|
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677 |
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678 branch_prob (); |
| 0 | 679 |
|
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680 if (! flag_branch_probabilities |
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681 && flag_profile_values) |
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682 gimple_gen_ic_func_profiler (); |
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683 |
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684 if (flag_branch_probabilities |
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685 && flag_profile_values |
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686 && flag_value_profile_transformations) |
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687 gimple_value_profile_transformations (); |
| 0 | 688 |
|
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689 /* The above could hose dominator info. Currently there is |
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690 none coming in, this is a safety valve. It should be |
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691 easy to adjust it, if and when there is some. */ |
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692 free_dominance_info (CDI_DOMINATORS); |
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693 free_dominance_info (CDI_POST_DOMINATORS); |
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694 pop_cfun (); |
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695 } |
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696 |
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697 /* Drop pure/const flags from instrumented functions. */ |
| 111 | 698 if (profile_arc_flag || flag_test_coverage) |
| 699 FOR_EACH_DEFINED_FUNCTION (node) | |
| 700 { | |
| 701 if (!gimple_has_body_p (node->decl) | |
| 702 || !(!node->clone_of | |
| 703 || node->decl != node->clone_of->decl)) | |
| 704 continue; | |
| 705 | |
| 706 /* Don't profile functions produced for builtin stuff. */ | |
| 707 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) | |
| 708 continue; | |
| 709 | |
| 710 node->set_const_flag (false, false); | |
| 711 node->set_pure_flag (false, false); | |
| 712 } | |
| 713 | |
| 714 /* Update call statements and rebuild the cgraph. */ | |
| 715 FOR_EACH_DEFINED_FUNCTION (node) | |
|
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716 { |
| 111 | 717 basic_block bb; |
| 718 | |
| 719 if (!gimple_has_body_p (node->decl) | |
| 720 || !(!node->clone_of | |
| 721 || node->decl != node->clone_of->decl)) | |
|
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722 continue; |
| 0 | 723 |
|
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724 /* Don't profile functions produced for builtin stuff. */ |
| 111 | 725 if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
|
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726 continue; |
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727 |
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728 push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
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729 |
| 111 | 730 FOR_EACH_BB_FN (bb, cfun) |
|
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731 { |
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732 gimple_stmt_iterator gsi; |
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733 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
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734 { |
| 111 | 735 gimple *stmt = gsi_stmt (gsi); |
|
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736 if (is_gimple_call (stmt)) |
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737 update_stmt (stmt); |
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738 } |
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739 } |
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740 |
| 111 | 741 /* re-merge split blocks. */ |
| 742 cleanup_tree_cfg (); | |
|
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743 update_ssa (TODO_update_ssa); |
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744 |
| 111 | 745 cgraph_edge::rebuild_edges (); |
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746 |
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747 pop_cfun (); |
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748 } |
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749 |
| 111 | 750 handle_missing_profiles (); |
| 751 | |
| 752 del_node_map (); | |
| 0 | 753 return 0; |
| 754 } | |
| 755 | |
| 111 | 756 namespace { |
| 757 | |
| 758 const pass_data pass_data_ipa_tree_profile = | |
| 759 { | |
| 760 SIMPLE_IPA_PASS, /* type */ | |
| 761 "profile", /* name */ | |
| 762 OPTGROUP_NONE, /* optinfo_flags */ | |
| 763 TV_IPA_PROFILE, /* tv_id */ | |
| 764 0, /* properties_required */ | |
| 765 0, /* properties_provided */ | |
| 766 0, /* properties_destroyed */ | |
| 767 0, /* todo_flags_start */ | |
| 768 TODO_dump_symtab, /* todo_flags_finish */ | |
| 769 }; | |
|
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770 |
| 111 | 771 class pass_ipa_tree_profile : public simple_ipa_opt_pass |
|
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772 { |
| 111 | 773 public: |
| 774 pass_ipa_tree_profile (gcc::context *ctxt) | |
| 775 : simple_ipa_opt_pass (pass_data_ipa_tree_profile, ctxt) | |
| 776 {} | |
| 777 | |
| 778 /* opt_pass methods: */ | |
| 779 virtual bool gate (function *); | |
| 780 virtual unsigned int execute (function *) { return tree_profiling (); } | |
| 781 | |
| 782 }; // class pass_ipa_tree_profile | |
| 783 | |
| 784 bool | |
| 785 pass_ipa_tree_profile::gate (function *) | |
| 786 { | |
| 787 /* When profile instrumentation, use or test coverage shall be performed. | |
| 788 But for AutoFDO, this there is no instrumentation, thus this pass is | |
| 789 diabled. */ | |
| 790 return (!in_lto_p && !flag_auto_profile | |
|
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791 && (flag_branch_probabilities || flag_test_coverage |
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792 || profile_arc_flag)); |
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793 } |
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794 |
| 111 | 795 } // anon namespace |
| 796 | |
| 797 simple_ipa_opt_pass * | |
| 798 make_pass_ipa_tree_profile (gcc::context *ctxt) | |
| 0 | 799 { |
| 111 | 800 return new pass_ipa_tree_profile (ctxt); |
| 801 } | |
| 0 | 802 |
| 803 #include "gt-tree-profile.h" |