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SMS: Misc. fixes

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From-SVN: r176970
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Revital Eres 2011-07-31 10:21:01 +00:00 committed by Revital Eres
parent f047e5183b
commit 413e50a27d
2 changed files with 23 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-07-31 Revital Eres <revital.eres@linaro.org>
* modulo-sched.c: Change comment.
(reset_sched_times): Fix print message.
(print_partial_schedule): Add print info.
2011-07-31 Tom de Vries <tom@codesourcery.com>
PR middle-end/43513

28
gcc/modulo-sched.c
View File

@ -84,13 +84,14 @@ along with GCC; see the file COPYING3. If not see
II cycles (i.e. use register copies to prevent a def from overwriting
itself before reaching the use).
SMS works with countable loops whose loop count can be easily
adjusted. This is because we peel a constant number of iterations
into a prologue and epilogue for which we want to avoid emitting
the control part, and a kernel which is to iterate that constant
number of iterations less than the original loop. So the control
part should be a set of insns clearly identified and having its
own iv, not otherwise used in the loop (at-least for now), which
SMS works with countable loops (1) whose control part can be easily
decoupled from the rest of the loop and (2) whose loop count can
be easily adjusted. This is because we peel a constant number of
iterations into a prologue and epilogue for which we want to avoid
emitting the control part, and a kernel which is to iterate that
constant number of iterations less than the original loop. So the
control part should be a set of insns clearly identified and having
its own iv, not otherwise used in the loop (at-least for now), which
initializes a register before the loop to the number of iterations.
Currently SMS relies on the do-loop pattern to recognize such loops,
where (1) the control part comprises of all insns defining and/or
@ -598,8 +599,8 @@ reset_sched_times (partial_schedule_ptr ps, int amount)
/* Print the scheduling times after the rotation. */
fprintf (dump_file, "crr_insn->node=%d (insn id %d), "
"crr_insn->cycle=%d, min_cycle=%d", crr_insn->node->cuid,
INSN_UID (crr_insn->node->insn), SCHED_TIME (u),
normalized_time);
INSN_UID (crr_insn->node->insn), normalized_time,
new_min_cycle);
if (JUMP_P (crr_insn->node->insn))
fprintf (dump_file, " (branch)");
fprintf (dump_file, "\n");
@ -2550,8 +2551,13 @@ print_partial_schedule (partial_schedule_ptr ps, FILE *dump)
fprintf (dump, "\n[ROW %d ]: ", i);
while (ps_i)
{
fprintf (dump, "%d, ",
INSN_UID (ps_i->node->insn));
if (JUMP_P (ps_i->node->insn))
fprintf (dump, "%d (branch), ",
INSN_UID (ps_i->node->insn));
else
fprintf (dump, "%d, ",
INSN_UID (ps_i->node->insn));
ps_i = ps_i->next_in_row;
}
}