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predict.c (determine_unlikely_bbs): Handle correctly BBs which appears in the queue multiple times.

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* predict.c (determine_unlikely_bbs): Handle correctly BBs
	which appears in the queue multiple times.

From-SVN: r256648
This commit is contained in:
Jan Hubicka 2018-01-13 20:32:04 +01:00 committed by Jan Hubicka
parent 39f309aca6
commit f36180f4a4
2 changed files with 9 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2018-01-13 Jan Hubicka <hubicka@ucw.cz>
* predict.c (determine_unlikely_bbs): Handle correctly BBs
which appears in the queue multiple times.
2018-01-13 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>

6
gcc/predict.c
View File

@ -3565,6 +3565,8 @@ determine_unlikely_bbs ()
while (worklist.length () > 0)
{
bb = worklist.pop ();
if (bb->count == profile_count::zero ())
continue;
if (bb != ENTRY_BLOCK_PTR_FOR_FN (cfun))
{
bool found = false;
@ -3583,8 +3585,7 @@ determine_unlikely_bbs ()
if (found)
continue;
}
if (!(bb->count == profile_count::zero ())
&& (dump_file && (dump_flags & TDF_DETAILS)))
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file,
"Basic block %i is marked unlikely by backward prop\n",
bb->index);
@ -3594,6 +3595,7 @@ determine_unlikely_bbs ()
{
if (!(e->src->count == profile_count::zero ()))
{
gcc_checking_assert (nsuccs[e->src->index] > 0);
nsuccs[e->src->index]--;
if (!nsuccs[e->src->index])
worklist.safe_push (e->src);