Mercurial > hg > CbC > CbC_gcc
annotate gcc/graphite.c @ 55:77e2b8dfacca gcc-4.4.5
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author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Fri, 12 Feb 2010 23:39:51 +0900 |
parents | a06113de4d67 |
children | b7f97abdc517 |
rev | line source |
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0 | 1 /* Gimple Represented as Polyhedra. |
2 Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc. | |
3 Contributed by Sebastian Pop <sebastian.pop@inria.fr>. | |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify | |
8 it under the terms of the GNU General Public License as published by | |
9 the Free Software Foundation; either version 3, or (at your option) | |
10 any later version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, | |
13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 GNU General Public License for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 /* This pass converts GIMPLE to GRAPHITE, performs some loop | |
22 transformations and then converts the resulting representation back | |
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23 to GIMPLE. |
0 | 24 |
25 An early description of this pass can be found in the GCC Summit'06 | |
26 paper "GRAPHITE: Polyhedral Analyses and Optimizations for GCC". | |
27 The wiki page http://gcc.gnu.org/wiki/Graphite contains pointers to | |
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28 the related work. |
0 | 29 |
30 One important document to read is CLooG's internal manual: | |
31 http://repo.or.cz/w/cloog-ppl.git?a=blob_plain;f=doc/cloog.texi;hb=HEAD | |
32 that describes the data structure of loops used in this file, and | |
33 the functions that are used for transforming the code. */ | |
34 | |
35 #include "config.h" | |
36 #include "system.h" | |
37 #include "coretypes.h" | |
38 #include "tm.h" | |
39 #include "ggc.h" | |
40 #include "tree.h" | |
41 #include "rtl.h" | |
42 #include "basic-block.h" | |
43 #include "diagnostic.h" | |
44 #include "tree-flow.h" | |
45 #include "toplev.h" | |
46 #include "tree-dump.h" | |
47 #include "timevar.h" | |
48 #include "cfgloop.h" | |
49 #include "tree-chrec.h" | |
50 #include "tree-data-ref.h" | |
51 #include "tree-scalar-evolution.h" | |
52 #include "tree-pass.h" | |
53 #include "value-prof.h" | |
54 #include "pointer-set.h" | |
55 #include "gimple.h" | |
55
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56 #include "sese.h" |
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57 #include "predict.h" |
0 | 58 |
59 #ifdef HAVE_cloog | |
60 | |
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61 #include "cloog/cloog.h" |
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62 #include "ppl_c.h" |
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63 #include "graphite-ppl.h" |
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64 #include "graphite.h" |
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65 #include "graphite-poly.h" |
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66 #include "graphite-scop-detection.h" |
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67 #include "graphite-clast-to-gimple.h" |
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68 #include "graphite-sese-to-poly.h" |
0 | 69 |
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70 /* Print global statistics to FILE. */ |
0 | 71 |
72 static void | |
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73 print_global_statistics (FILE* file) |
0 | 74 { |
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75 long n_bbs = 0; |
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76 long n_loops = 0; |
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77 long n_stmts = 0; |
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78 long n_conditions = 0; |
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79 long n_p_bbs = 0; |
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80 long n_p_loops = 0; |
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81 long n_p_stmts = 0; |
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82 long n_p_conditions = 0; |
0 | 83 |
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84 basic_block bb; |
0 | 85 |
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86 FOR_ALL_BB (bb) |
0 | 87 { |
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88 gimple_stmt_iterator psi; |
0 | 89 |
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90 n_bbs++; |
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91 n_p_bbs += bb->count; |
0 | 92 |
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93 /* Ignore artificial surrounding loop. */ |
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94 if (bb == bb->loop_father->header |
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95 && bb->index != 0) |
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96 { |
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97 n_loops++; |
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98 n_p_loops += bb->count; |
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99 } |
0 | 100 |
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101 if (VEC_length (edge, bb->succs) > 1) |
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102 { |
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103 n_conditions++; |
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104 n_p_conditions += bb->count; |
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105 } |
0 | 106 |
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107 for (psi = gsi_start_bb (bb); !gsi_end_p (psi); gsi_next (&psi)) |
0 | 108 { |
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109 n_stmts++; |
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110 n_p_stmts += bb->count; |
0 | 111 } |
112 } | |
113 | |
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114 fprintf (file, "\nGlobal statistics ("); |
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115 fprintf (file, "BBS:%ld, ", n_bbs); |
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116 fprintf (file, "LOOPS:%ld, ", n_loops); |
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117 fprintf (file, "CONDITIONS:%ld, ", n_conditions); |
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118 fprintf (file, "STMTS:%ld)\n", n_stmts); |
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119 fprintf (file, "\nGlobal profiling statistics ("); |
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120 fprintf (file, "BBS:%ld, ", n_p_bbs); |
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121 fprintf (file, "LOOPS:%ld, ", n_p_loops); |
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122 fprintf (file, "CONDITIONS:%ld, ", n_p_conditions); |
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123 fprintf (file, "STMTS:%ld)\n", n_p_stmts); |
0 | 124 } |
125 | |
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126 /* Print statistics for SCOP to FILE. */ |
0 | 127 |
128 static void | |
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129 print_graphite_scop_statistics (FILE* file, scop_p scop) |
0 | 130 { |
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131 long n_bbs = 0; |
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132 long n_loops = 0; |
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133 long n_stmts = 0; |
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134 long n_conditions = 0; |
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135 long n_p_bbs = 0; |
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136 long n_p_loops = 0; |
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137 long n_p_stmts = 0; |
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138 long n_p_conditions = 0; |
0 | 139 |
140 basic_block bb; | |
141 | |
142 FOR_ALL_BB (bb) | |
143 { | |
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144 gimple_stmt_iterator psi; |
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145 loop_p loop = bb->loop_father; |
0 | 146 |
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147 if (!bb_in_sese_p (bb, SCOP_REGION (scop))) |
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148 continue; |
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149 |
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150 n_bbs++; |
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151 n_p_bbs += bb->count; |
0 | 152 |
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153 if (VEC_length (edge, bb->succs) > 1) |
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154 { |
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155 n_conditions++; |
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156 n_p_conditions += bb->count; |
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157 } |
0 | 158 |
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159 for (psi = gsi_start_bb (bb); !gsi_end_p (psi); gsi_next (&psi)) |
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160 { |
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161 n_stmts++; |
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162 n_p_stmts += bb->count; |
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163 } |
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164 |
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165 if (loop->header == bb && loop_in_sese_p (loop, SCOP_REGION (scop))) |
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166 { |
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167 n_loops++; |
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168 n_p_loops += bb->count; |
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169 } |
0 | 170 } |
171 | |
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172 fprintf (file, "\nSCoP statistics ("); |
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173 fprintf (file, "BBS:%ld, ", n_bbs); |
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174 fprintf (file, "LOOPS:%ld, ", n_loops); |
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175 fprintf (file, "CONDITIONS:%ld, ", n_conditions); |
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176 fprintf (file, "STMTS:%ld)\n", n_stmts); |
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177 fprintf (file, "\nSCoP profiling statistics ("); |
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178 fprintf (file, "BBS:%ld, ", n_p_bbs); |
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179 fprintf (file, "LOOPS:%ld, ", n_p_loops); |
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180 fprintf (file, "CONDITIONS:%ld, ", n_p_conditions); |
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181 fprintf (file, "STMTS:%ld)\n", n_p_stmts); |
0 | 182 } |
183 | |
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184 /* Print statistics for SCOPS to FILE. */ |
0 | 185 |
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186 static void |
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187 print_graphite_statistics (FILE* file, VEC (scop_p, heap) *scops) |
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188 { |
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189 int i; |
0 | 190 |
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191 scop_p scop; |
0 | 192 |
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193 for (i = 0; VEC_iterate (scop_p, scops, i, scop); i++) |
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194 print_graphite_scop_statistics (file, scop); |
0 | 195 } |
196 | |
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197 /* Initialize graphite: when there are no loops returns false. */ |
0 | 198 |
199 static bool | |
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200 graphite_initialize (void) |
0 | 201 { |
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202 if (number_of_loops () <= 1 |
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203 /* FIXME: This limit on the number of basic blocks of a function |
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204 should be removed when the SCOP detection is faster. */ |
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205 || n_basic_blocks > 100) |
0 | 206 { |
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207 if (dump_file && (dump_flags & TDF_DETAILS)) |
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208 print_global_statistics (dump_file); |
0 | 209 |
210 return false; | |
211 } | |
212 | |
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213 recompute_all_dominators (); |
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214 initialize_original_copy_tables (); |
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215 cloog_initialize (); |
0 | 216 |
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217 if (dump_file && dump_flags) |
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218 dump_function_to_file (current_function_decl, dump_file, dump_flags); |
0 | 219 |
220 return true; | |
221 } | |
222 | |
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223 /* Finalize graphite: perform CFG cleanup when NEED_CFG_CLEANUP_P is |
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224 true. */ |
0 | 225 |
226 static void | |
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227 graphite_finalize (bool need_cfg_cleanup_p) |
0 | 228 { |
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229 if (need_cfg_cleanup_p) |
0 | 230 { |
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231 cleanup_tree_cfg (); |
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232 profile_status = PROFILE_ABSENT; |
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233 release_recorded_exits (); |
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234 tree_estimate_probability (); |
0 | 235 } |
236 | |
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237 cloog_finalize (); |
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238 free_original_copy_tables (); |
0 | 239 |
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240 if (dump_file && dump_flags) |
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241 print_loops (dump_file, 3); |
0 | 242 } |
243 | |
244 /* Perform a set of linear transforms on the loops of the current | |
245 function. */ | |
246 | |
247 void | |
248 graphite_transform_loops (void) | |
249 { | |
250 int i; | |
251 scop_p scop; | |
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252 bool need_cfg_cleanup_p = false; |
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253 VEC (scop_p, heap) *scops = NULL; |
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254 htab_t bb_pbb_mapping; |
0 | 255 |
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256 if (!graphite_initialize ()) |
0 | 257 return; |
258 | |
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259 build_scops (&scops); |
0 | 260 |
261 if (dump_file && (dump_flags & TDF_DETAILS)) | |
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262 { |
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263 print_graphite_statistics (dump_file, scops); |
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264 print_global_statistics (dump_file); |
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265 } |
0 | 266 |
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267 bb_pbb_mapping = htab_create (10, bb_pbb_map_hash, eq_bb_pbb_map, free); |
0 | 268 |
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269 for (i = 0; VEC_iterate (scop_p, scops, i, scop); i++) |
0 | 270 { |
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271 bool transform_done = false; |
0 | 272 |
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273 if (!build_poly_scop (scop)) |
0 | 274 continue; |
275 | |
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276 if (apply_poly_transforms (scop)) |
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277 transform_done = gloog (scop, bb_pbb_mapping); |
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278 else |
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279 check_poly_representation (scop); |
0 | 280 |
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281 if (transform_done) |
0 | 282 { |
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283 scev_reset (); |
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284 need_cfg_cleanup_p = true; |
0 | 285 } |
286 } | |
287 | |
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288 htab_delete (bb_pbb_mapping); |
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289 free_scops (scops); |
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290 graphite_finalize (need_cfg_cleanup_p); |
0 | 291 } |
292 | |
293 #else /* If Cloog is not available: #ifndef HAVE_cloog. */ | |
294 | |
295 void | |
296 graphite_transform_loops (void) | |
297 { | |
298 sorry ("Graphite loop optimizations cannot be used"); | |
299 } | |
300 | |
301 #endif |