diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 9fa68bae651..9d2b28b9af8 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -96,6 +96,8 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA /* Include output.h for dump_file. */ #include "output.h" #include "params.h" +#include "timevar.h" +#include "tree-pass.h" /* Number of attempts to combine instructions in this function. */ @@ -12514,3 +12516,50 @@ dump_combine_total_stats (FILE *file) "\n;; Combiner totals: %d attempts, %d substitutions (%d requiring new space),\n;; %d successes.\n", total_attempts, total_merges, total_extras, total_successes); } + + +static bool +gate_handle_combine (void) +{ + return (optimize > 0); +} + +/* Try combining insns through substitution. */ +static void +rest_of_handle_combine (void) +{ + int rebuild_jump_labels_after_combine + = combine_instructions (get_insns (), max_reg_num ()); + + /* Combining insns may have turned an indirect jump into a + direct jump. Rebuild the JUMP_LABEL fields of jumping + instructions. */ + if (rebuild_jump_labels_after_combine) + { + timevar_push (TV_JUMP); + rebuild_jump_labels (get_insns ()); + timevar_pop (TV_JUMP); + + delete_dead_jumptables (); + cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE); + } +} + +struct tree_opt_pass pass_combine = +{ + "combine", /* name */ + gate_handle_combine, /* gate */ + rest_of_handle_combine, /* execute */ + NULL, /* sub */ + NULL, /* next */ + 0, /* static_pass_number */ + TV_COMBINE, /* tv_id */ + 0, /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_dump_func | + TODO_ggc_collect, /* todo_flags_finish */ + 'c' /* letter */ +}; + |
