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comparison gcc/tree-ssa-loop-unswitch.c @ 63:b7f97abdc517 gcc-4.6-20100522

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update gcc from gcc-4.5.0 to gcc-4.6
author ryoma <e075725@ie.u-ryukyu.ac.jp>
date Mon, 24 May 2010 12:47:05 +0900
parents 77e2b8dfacca
children f6334be47118
comparison
equal deleted inserted replaced
56:3c8a44c06a95 63:b7f97abdc517
20 #include "config.h" 20 #include "config.h"
21 #include "system.h" 21 #include "system.h"
22 #include "coretypes.h" 22 #include "coretypes.h"
23 #include "tm.h" 23 #include "tm.h"
24 #include "tree.h" 24 #include "tree.h"
25 #include "rtl.h"
26 #include "tm_p.h" 25 #include "tm_p.h"
27 #include "hard-reg-set.h"
28 #include "basic-block.h" 26 #include "basic-block.h"
29 #include "output.h" 27 #include "output.h"
30 #include "diagnostic.h" 28 #include "diagnostic.h"
31 #include "tree-flow.h" 29 #include "tree-flow.h"
32 #include "tree-dump.h" 30 #include "tree-dump.h"
86 bool changed = false; 84 bool changed = false;
87 85
88 /* Go through inner loops (only original ones). */ 86 /* Go through inner loops (only original ones). */
89 FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST) 87 FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
90 { 88 {
89 if (dump_file && (dump_flags & TDF_DETAILS))
90 fprintf (dump_file, ";; Considering loop %d\n", loop->num);
91
92 /* Do not unswitch in cold regions. */
93 if (optimize_loop_for_size_p (loop))
94 {
95 if (dump_file && (dump_flags & TDF_DETAILS))
96 fprintf (dump_file, ";; Not unswitching cold loops\n");
97 continue;
98 }
99
100 /* The loop should not be too large, to limit code growth. */
101 if (tree_num_loop_insns (loop, &eni_size_weights)
102 > (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))
103 {
104 if (dump_file && (dump_flags & TDF_DETAILS))
105 fprintf (dump_file, ";; Not unswitching, loop too big\n");
106 continue;
107 }
108
91 changed |= tree_unswitch_single_loop (loop, 0); 109 changed |= tree_unswitch_single_loop (loop, 0);
92 } 110 }
93 111
94 if (changed) 112 if (changed)
95 return TODO_cleanup_cfg; 113 return TODO_cleanup_cfg;
184 /* Do not unswitch too much. */ 202 /* Do not unswitch too much. */
185 if (num > PARAM_VALUE (PARAM_MAX_UNSWITCH_LEVEL)) 203 if (num > PARAM_VALUE (PARAM_MAX_UNSWITCH_LEVEL))
186 { 204 {
187 if (dump_file && (dump_flags & TDF_DETAILS)) 205 if (dump_file && (dump_flags & TDF_DETAILS))
188 fprintf (dump_file, ";; Not unswitching anymore, hit max level\n"); 206 fprintf (dump_file, ";; Not unswitching anymore, hit max level\n");
189 return false;
190 }
191
192 /* Only unswitch innermost loops. */
193 if (loop->inner)
194 {
195 if (dump_file && (dump_flags & TDF_DETAILS))
196 fprintf (dump_file, ";; Not unswitching, not innermost loop\n");
197 return false;
198 }
199
200 /* Do not unswitch in cold regions. */
201 if (optimize_loop_for_size_p (loop))
202 {
203 if (dump_file && (dump_flags & TDF_DETAILS))
204 fprintf (dump_file, ";; Not unswitching cold loops\n");
205 return false;
206 }
207
208 /* The loop should not be too large, to limit code growth. */
209 if (tree_num_loop_insns (loop, &eni_size_weights)
210 > (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))
211 {
212 if (dump_file && (dump_flags & TDF_DETAILS))
213 fprintf (dump_file, ";; Not unswitching, loop too big\n");
214 return false; 207 return false;
215 } 208 }
216 209
217 i = 0; 210 i = 0;
218 bbs = get_loop_body (loop); 211 bbs = get_loop_body (loop);