diff options
Diffstat (limited to 'gcc/loop-init.c')
| -rw-r--r-- | gcc/loop-init.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/gcc/loop-init.c b/gcc/loop-init.c index d44575b..d6c3703 100644 --- a/gcc/loop-init.c +++ b/gcc/loop-init.c @@ -34,10 +34,11 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA /* Initialize loop optimizer. This is used by the tree and RTL loop - optimizers. */ + optimizers. FLAGS specify what properties to compute and/or ensure for + loops. */ struct loops * -loop_optimizer_init (FILE *dumpfile) +loop_optimizer_init (FILE *dumpfile, unsigned flags) { struct loops *loops = XCNEW (struct loops); edge e; @@ -77,13 +78,19 @@ loop_optimizer_init (FILE *dumpfile) loops->cfg.dfs_order = NULL; /* Create pre-headers. */ - create_preheaders (loops, CP_SIMPLE_PREHEADERS); + if (flags & LOOPS_HAVE_PREHEADERS) + create_preheaders (loops, CP_SIMPLE_PREHEADERS); /* Force all latches to have only single successor. */ - force_single_succ_latches (loops); + if (flags & LOOPS_HAVE_SIMPLE_LATCHES) + force_single_succ_latches (loops); /* Mark irreducible loops. */ - mark_irreducible_loops (loops); + if (flags & LOOPS_HAVE_MARKED_IRREDUCIBLE_REGIONS) + mark_irreducible_loops (loops); + + if (flags & LOOPS_HAVE_MARKED_SINGLE_EXITS) + mark_single_exit_loops (loops); /* Dump loops. */ flow_loops_dump (loops, dumpfile, NULL, 1); @@ -166,7 +173,7 @@ rtl_loop_init (void) /* Initialize structures for layout changes. */ cfg_layout_initialize (0); - current_loops = loop_optimizer_init (dump_file); + current_loops = loop_optimizer_init (dump_file, LOOPS_NORMAL); } struct tree_opt_pass pass_rtl_loop_init = |