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re PR rtl-optimization/15521 (sched1 extends life of hard registers on SMALL_REGISTER_CLASSES targets when exceptions are enabled) 

PR rtl-optimization/15521:
	* sched-int.h (in_post_call_group_p): Change type to enum.
	* sched-deps.c (sched_analyze_insn):
	(sched_analyze): When in_post_call_group_p is post_call_initial,
	don't add a dependency, but still set SCHED_GROUP_P and CANT_MOVE,
	and also reset in_post_call_group_p to post_call.
	(sched_analyze): When the previous basic block ended in a CALL_INSN,
	initialize in_post_call_group_p as post_call_initial.
	(init_deps): initialize in_post_call_group_p to not_post_call.

From-SVN: r82831
This commit is contained in:
J"orn Rennecke 2004-06-09 12:48:21 +00:00 committed by Joern Rennecke
parent a4ac5dd3ef
commit b40742a531
3 changed files with 34 additions and 5 deletions
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12
gcc/ChangeLog
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@ -1,3 +1,15 @@
2004-06-09 J"orn Rennecke <joern.rennecke@superh.com>
PR rtl-optimization/15521:
* sched-int.h (in_post_call_group_p): Change type to enum.
* sched-deps.c (sched_analyze_insn):
(sched_analyze): When in_post_call_group_p is post_call_initial,
don't add a dependency, but still set SCHED_GROUP_P and CANT_MOVE,
and also reset in_post_call_group_p to post_call.
(sched_analyze): When the previous basic block ended in a CALL_INSN,
initialize in_post_call_group_p as post_call_initial.
(init_deps): initialize in_post_call_group_p to not_post_call.
2004-06-09 Arnaud Charlet <charlet@act-europe.fr>
PR ada/6637

25
gcc/sched-deps.c
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@ -1145,13 +1145,21 @@ sched_analyze_insn (struct deps *deps, rtx x, rtx insn, rtx loop_notes)
if (src_regno < FIRST_PSEUDO_REGISTER
|| dest_regno < FIRST_PSEUDO_REGISTER)
{
set_sched_group_p (insn);
/* If we are inside a post-call group right at the start of the
scheduling region, we must not add a dependency. */
if (deps->in_post_call_group_p == post_call_initial)
{
SCHED_GROUP_P (insn) = 1;
deps->in_post_call_group_p = post_call;
}
else
set_sched_group_p (insn);
CANT_MOVE (insn) = 1;
}
else
{
end_call_group:
deps->in_post_call_group_p = false;
deps->in_post_call_group_p = not_post_call;
}
}
}
@ -1168,6 +1176,15 @@ sched_analyze (struct deps *deps, rtx head, rtx tail)
if (current_sched_info->use_cselib)
cselib_init (true);
/* Before reload, if the previous block ended in a call, show that
we are inside a post-call group, so as to keep the lifetimes of
hard registers correct. */
if (! reload_completed && GET_CODE (head) != CODE_LABEL)
{
insn = prev_nonnote_insn (head);
if (insn && GET_CODE (insn) == CALL_INSN)
deps->in_post_call_group_p = post_call_initial;
}
for (insn = head;; insn = NEXT_INSN (insn))
{
rtx link, end_seq, r0, set;
@ -1259,7 +1276,7 @@ sched_analyze (struct deps *deps, rtx head, rtx tail)
/* Before reload, begin a post-call group, so as to keep the
lifetimes of hard registers correct. */
if (! reload_completed)
deps->in_post_call_group_p = true;
deps->in_post_call_group_p = post_call;
}
/* See comments on reemit_notes as to why we do this.
@ -1420,7 +1437,7 @@ init_deps (struct deps *deps)
deps->last_pending_memory_flush = 0;
deps->last_function_call = 0;
deps->sched_before_next_call = 0;
deps->in_post_call_group_p = false;
deps->in_post_call_group_p = not_post_call;
deps->libcall_block_tail_insn = 0;
}

2
gcc/sched-int.h
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@ -94,7 +94,7 @@ struct deps
/* Used to keep post-call pseudo/hard reg movements together with
the call. */
bool in_post_call_group_p;
enum { not_post_call, post_call, post_call_initial } in_post_call_group_p;
/* Set to the tail insn of the outermost libcall block.