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loop.c (scan_loop): Ensure update_end label does not go away until reg_scan_update is run. 

* loop.c (scan_loop): Ensure update_end label does not
	go away until reg_scan_update is run.

From-SVN: r35428
This commit is contained in:
Jakub Jelinek 2000-08-02 19:29:52 +02:00 committed by Jakub Jelinek
parent 50e60bc3d7
commit bb45bd5a12
2 changed files with 13 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2000-08-02 Jakub Jelinek <jakub@redhat.com>
* loop.c (scan_loop): Ensure update_end label does not
go away until reg_scan_update is run.
2000-08-02 Zack Weinberg <zack@wolery.cumb.org>
* c-common.h: Prototype min_precision and c_build_qualified_type here...

8
gcc/loop.c
View File

@ -1131,11 +1131,19 @@ scan_loop (loop, flags)
if (flag_strength_reduce)
{
if (update_end && GET_CODE (update_end) == CODE_LABEL)
/* Ensure our label doesn't go away. */
LABEL_NUSES (update_end)++;
the_movables = movables;
strength_reduce (loop, insn_count, flags);
reg_scan_update (update_start, update_end, loop_max_reg);
loop_max_reg = max_reg_num ();
if (update_end && GET_CODE (update_end) == CODE_LABEL
&& --LABEL_NUSES (update_end) == 0)
delete_insn (update_end);
}
VARRAY_FREE (reg_single_usage);