------- Additional Comments From falk at debian dot org 2004-11-21 02:33
-------
The bug seems to be caused by the loop unroller making a pseudo local
to be able to duplicate it while it is still needed outside of the loop.
Reverting Eric Botcazou's patch for rtl-optimization/11841, which is
also about this, fixes the problem. I don't really understand what's going
on, but is it possible we still have to look at the pseudo luids and not
only the note luids? Like this?
diff -u -p -r1.184.2.9 unroll.c
--- unroll.c 17 May 2004 21:05:48 -0000 1.184.2.9
+++ unroll.c 21 Nov 2004 02:30:41 -0000
@@ -794,6 +794,8 @@ unroll_loop (loop, insn_count, strength_
for (r = FIRST_PSEUDO_REGISTER; r < max_reg_before_loop; ++r)
if (REGNO_FIRST_UID (r) > 0 && REGNO_FIRST_UID (r) < max_uid_for_loop
&& REGNO_FIRST_LUID (r) >= copy_start_luid
+ && REGNO_LAST_UID (r) > 0 && REGNO_LAST_UID (r) < max_uid_for_loop
+ && REGNO_LAST_LUID (r) <= copy_end_luid
&& REGNO_LAST_NOTE_UID (r) > 0 && REGNO_LAST_NOTE_UID (r) <
max_uid_for_loop
&& REGNO_LAST_NOTE_LUID (r) <= copy_end_luid)
{
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18577
