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| author | Mostafa Hagog <mustafa@il.ibm.com> | 2004-08-08 21:35:53 +0000 |
|---|---|---|
| committer | Mostafa Hagog <hagog@gcc.gnu.org> | 2004-08-08 21:35:53 +0000 |
| commit | d72372e46ac06b4db61143f91367a777089cc6f6 (patch) | |
| tree | d4a4dc1d2fd739eff16c75b3bbf87780df96f926 /gcc/sched-rgn.c | |
| parent | 94538bd12ae8ffa02164399a616ef806e77f797b (diff) | |
| download | gcc-d72372e46ac06b4db61143f91367a777089cc6f6.zip gcc-d72372e46ac06b4db61143f91367a777089cc6f6.tar.gz gcc-d72372e46ac06b4db61143f91367a777089cc6f6.tar.bz2 | |
common.opt (freschedule-modulo-scheduled-loops): New flag.
2004-08-08 Mostafa Hagog <mustafa@il.ibm.com>
Ayal Zaks <zaks@il.ibm.com>
* common.opt (freschedule-modulo-scheduled-loops): New flag.
* final.c (final_scan_insn): Handle NOTE_DISABLE_SCHED_OF_BLOCK.
* modulo-sched.c (sms_schedule): Emit a note to disable scheduling
when -freschedule-modulo-scheduled-loops flag is not specified.
(sms_schedule_by_order, ps_insn_advance_column, add_node_to_ps,
add_node_to_ps, ps_has_conflicts, ps_add_node_check_conflicts):
More accurate placing of insn in row of partial schedule.
(ps_insn_find_column): New function.
* rtl.h (NOTE_DISABLE_SCHED_OF_BLOCK): New note.
* sched-rgn.c (sched_is_disabled_for_current_region_p): New.
(schedule_region): Use sched_is_disabled_for_current_region_p.
* docs/invoke.texi: Document -freschedule-modulo-scheduled-loops.
Co-Authored-By: Ayal Zaks <zaks@il.ibm.com>
From-SVN: r85696
Diffstat (limited to 'gcc/sched-rgn.c')
| -rw-r--r-- | gcc/sched-rgn.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/sched-rgn.c b/gcc/sched-rgn.c index 325e169..62d2f23 100644 --- a/gcc/sched-rgn.c +++ b/gcc/sched-rgn.c @@ -117,6 +117,7 @@ static int *out_edges; static int is_cfg_nonregular (void); static int build_control_flow (struct edge_list *); static void new_edge (int, int); +static bool sched_is_disabled_for_current_region_p (void); /* A region is the main entity for interblock scheduling: insns are allowed to move between blocks in the same region, along @@ -2332,6 +2333,37 @@ debug_dependencies (void) fprintf (sched_dump, "\n"); } +/* Returns true if all the basic blocks of the current region have + NOTE_DISABLE_SCHED_OF_BLOCK which means not to schedule that region. */ +static bool +sched_is_disabled_for_current_region_p (void) +{ + rtx first_bb_insn, last_bb_insn, insn; + int bb; + + for (bb = 0; bb < current_nr_blocks; bb++) + { + bool disable_sched = false; + /* Searching for NOTE_DISABLE_SCHED_OF_BLOCK note between the + start and end of the basic block. */ + get_block_head_tail (BB_TO_BLOCK (bb), &first_bb_insn, + &last_bb_insn); + for (insn = last_bb_insn; insn != NULL && insn != first_bb_insn; + insn = PREV_INSN (insn)) + if (GET_CODE (insn) == NOTE + && (NOTE_LINE_NUMBER (insn) + == NOTE_DISABLE_SCHED_OF_BLOCK)) + { + disable_sched = true; + break; + } + if (! disable_sched) + return false; + } + + return true; +} + /* Schedule a region. A region is either an inner loop, a loop-free subroutine, or a single basic block. Each bb in the region is scheduled after its flow predecessors. */ @@ -2347,6 +2379,11 @@ schedule_region (int rgn) current_nr_blocks = RGN_NR_BLOCKS (rgn); current_blocks = RGN_BLOCKS (rgn); + /* Don't schedule region that is marked by + NOTE_DISABLE_SCHED_OF_BLOCK. */ + if (sched_is_disabled_for_current_region_p ()) + return; + init_deps_global (); /* Initializations for region data dependence analysis. */ |