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re PR rtl-optimization/57268 (c nested loops hang compiler in sched-deps.c)

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PR rtl-optimization/57268
	* sched-deps.c (sched_analyze_2): Don't flush_pedning_lists
	if DEBUG_INSN_P (insn).

	Reapply
	2013-05-31  Dinar Temirbulatov  <dinar@kugelworks.com>

	PR rtl-optimization/57268
	* sched-deps.c (sched_analyze_2): Flush dependence lists if
	the sum of the read and write lists exceeds MAX_PENDING_LIST_LENGTH.

From-SVN: r199615
This commit is contained in:
Jakub Jelinek 2013-06-03 19:38:39 +02:00 • committed by Jakub Jelinek
parent 0f1d3965bd
commit 1baf9159af
2 changed files with 22 additions and 2 deletions
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13
gcc/ChangeLog
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@ -1,3 +1,16 @@
2013-06-03 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/57268
* sched-deps.c (sched_analyze_2): Don't flush_pedning_lists
if DEBUG_INSN_P (insn).
Reapply
2013-05-31 Dinar Temirbulatov <dinar@kugelworks.com>
PR rtl-optimization/57268
* sched-deps.c (sched_analyze_2): Flush dependence lists if
the sum of the read and write lists exceeds MAX_PENDING_LIST_LENGTH.
2013-06-03 Yuri Rumyantsev <yuri.s.rumyantsev@intel.com>
* config/i386/i386.c (ix86_lea_outperforms): Fix formatting.

11
gcc/sched-deps.c
View file

@ -2690,8 +2690,15 @@ sched_analyze_2 (struct deps_desc *deps, rtx x, rtx insn)
/* Always add these dependencies to pending_reads, since
this insn may be followed by a write. */
if (!deps->readonly)
add_insn_mem_dependence (deps, true, insn, x);
if (!deps->readonly)
{
if ((deps->pending_read_list_length
+ deps->pending_write_list_length)
> MAX_PENDING_LIST_LENGTH
&& !DEBUG_INSN_P (insn))
flush_pending_lists (deps, insn, true, true);
add_insn_mem_dependence (deps, true, insn, x);
}
sched_analyze_2 (deps, XEXP (x, 0), insn);