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| author | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-01-03 02:29:00 +0000 |
|---|---|---|
| committer | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-01-03 02:29:00 +0000 |
| commit | 7cef6c97cbe9575d82af3934ba9db98706d40dbd (patch) | |
| tree | 65c401413cfba6d2049e2a002755074729d4e079 /gcc/modulo-sched.c | |
| parent | f517b36eec084c177098f54c4755ab7222fb7e2f (diff) | |
| download | gcc-7cef6c97cbe9575d82af3934ba9db98706d40dbd.tar.gz | |
* loop-unswitch.c (unswitch_loop): Pass probabilities to loopify.
* tree-ssa-loop-unswitch.c (tree_unswitch_loop): Pass probabilities
to loop_version.
* cfgloopmanip.c (scale_loop_frequencies): Export.
(loopify): Scale the frequencies by prescribed coefficients.
(set_zero_probability): New function.
(duplicate_loop_to_header_edge): Improve updating of frequencies.
(lv_adjust_loop_entry_edge, loop_version): Set probabilities
and frequencies according to arguments.
* tree-ssa-loop-manip.c (tree_unroll_loop): Set probabilities
correctly.
* cfg.c (scale_bbs_frequencies_int): Allow scaling the frequencies up.
* modulo-sched.c (sms_schedule): Set probabilities for entering
versioned loop correctly.
* tree-vect-transform.c (vect_transform_loop): Ditto.
* cfgloop.h (loopify, loop_version): Declaration changed.
(scale_loop_frequencies): Declared.
* gcc.dg/tree-ssa/update-unroll-1.c: New test.
* gcc.dg/tree-ssa/update-unswitch-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@120378 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/modulo-sched.c')
| -rw-r--r-- | gcc/modulo-sched.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/gcc/modulo-sched.c b/gcc/modulo-sched.c index 3352e20adcd..93f5b9a120b 100644 --- a/gcc/modulo-sched.c +++ b/gcc/modulo-sched.c @@ -868,6 +868,10 @@ canon_loop (struct loop *loop) } } +/* Probability in % that the sms-ed loop rolls enough so that optimized + version may be entered. Just a guess. */ +#define PROB_SMS_ENOUGH_ITERATIONS 80 + /* Main entry point, perform SMS scheduling on the loops of the function that consist of single basic blocks. */ static void @@ -882,7 +886,7 @@ sms_schedule (void) partial_schedule_ptr ps; struct df *df; basic_block bb = NULL; - struct loop *loop, *nloop; + struct loop *loop; basic_block condition_bb = NULL; edge latch_edge; gcov_type trip_count = 0; @@ -1181,8 +1185,12 @@ sms_schedule (void) { rtx comp_rtx = gen_rtx_fmt_ee (GT, VOIDmode, count_reg, GEN_INT(stage_count)); + unsigned prob = (PROB_SMS_ENOUGH_ITERATIONS + * REG_BR_PROB_BASE) / 100; - nloop = loop_version (loop, comp_rtx, &condition_bb, true); + loop_version (loop, comp_rtx, &condition_bb, + prob, prob, REG_BR_PROB_BASE - prob, + true); } /* Set new iteration count of loop kernel. */ |