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Revert this patch: 

-       * haifa-sched.c (schedule_block): Do not count USE and CLOBBER
-       insns against the issue rate.
-
-       * sched-deps.c (sched_create_groups_for_libcalls): New function.
-       (sched_analyze): Use it.

From-SVN: r54015
This commit is contained in:
Jeff Law 2002-05-29 13:55:34 -06:00
parent 8dc901ded3
commit e7206fbc5c
3 changed files with 1 additions and 71 deletions
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11
gcc/ChangeLog
View File

@ -63,17 +63,6 @@
(SUBTARGET_EXTRA_SPECS): Define.
(CPP_SPEC): Remove.
2002-05-29 Dale Johannesen <dalej@apple.com>
Michael Matz <matz@kde.org>
David Edelsohn <edesohn@gnu.org>
Jeff Law <law@redhat.com>
* haifa-sched.c (schedule_block): Do not count USE and CLOBBER
insns against the issue rate.
* sched-deps.c (sched_create_groups_for_libcalls): New function.
(sched_analyze): Use it.
2002-05-29 Chris Lattner <sabre@nondot.org>
* ssa.c (rename_insn_1): Rename uses of undefined registers to

5
gcc/haifa-sched.c
View File

@ -2179,10 +2179,7 @@ schedule_block (b, rgn_n_insns)
can_issue_more =
(*targetm.sched.variable_issue) (sched_dump, sched_verbose,
insn, can_issue_more);
/* A naked CLOBBER or USE generates no instruction, so do
not count them against the issue rate. */
else if (GET_CODE (PATTERN (insn)) != USE
&& GET_CODE (PATTERN (insn)) != CLOBBER)
else
can_issue_more--;
schedule_insn (insn, &ready, clock_var);

56
gcc/sched-deps.c
View File

@ -88,7 +88,6 @@ static void flush_pending_lists PARAMS ((struct deps *, rtx, int, int));
static void sched_analyze_1 PARAMS ((struct deps *, rtx, rtx));
static void sched_analyze_2 PARAMS ((struct deps *, rtx, rtx));
static void sched_analyze_insn PARAMS ((struct deps *, rtx, rtx, rtx));
static void sched_create_groups_for_libcalls PARAMS ((rtx, rtx));
static rtx group_leader PARAMS ((rtx));
static rtx get_condition PARAMS ((rtx));
@ -1211,57 +1210,6 @@ sched_analyze_insn (deps, x, insn, loop_notes)
}
}
/* Find any libcall sequences between HEAD and TAIL inclusive; set
SCHED_GROUP_P appropriately for such sequences. */
static void
sched_create_groups_for_libcalls (head, tail)
rtx head, tail;
{
rtx insn;
int tail_seen_p = 0;
for (insn = head;; insn = NEXT_INSN (insn))
{
rtx link, end_seq, set, r0, note;
if (INSN_P (insn) && GET_CODE (PATTERN (insn)) == CLOBBER
&& (r0 = XEXP (PATTERN (insn), 0), GET_CODE (r0) == REG)
&& (link = find_reg_note (insn, REG_LIBCALL, NULL_RTX)) != 0
&& (end_seq = XEXP (link, 0)) != 0
&& INSN_P (end_seq)
&& (set = single_set (end_seq)) != 0
&& SET_DEST (set) == r0 && SET_SRC (set) == r0
&& (note = find_reg_note (end_seq, REG_EQUAL, NULL_RTX)) != 0)
{
/* We found a libcall block between insn and end_seq.
The inner insns should be scheduled in a block. */
rtx inner;
/* Paranoia. */
if (insn == tail)
tail_seen_p = 1;
/* We don't want to set this flag on the initial clobber, because
the semantic of SCHED_GROUP_P is to make insn be scheduled
together with the previous insn. */
for (inner = NEXT_INSN (insn); inner; inner = NEXT_INSN (inner))
{
if (INSN_P (inner))
set_sched_group_p (inner);
/* Paranoia. */
if (inner == tail)
tail_seen_p = 1;
if (inner == end_seq)
break;
}
/* We should be able to skip the whole lib-call block.
Remember that one NEXT_INSN is done in the loop-iteration. */
insn = end_seq;
}
if (insn == tail || tail_seen_p)
break;
}
return;
}
/* Analyze every insn between HEAD and TAIL inclusive, creating LOG_LINKS
for every dependency. */
@ -1409,10 +1357,6 @@ sched_analyze (deps, head, tail)
{
if (current_sched_info->use_cselib)
cselib_finish ();
if (! reload_completed)
sched_create_groups_for_libcalls (head, tail);
return;
}
}