[Bug target/60298] [ARM/Thumb1] ICE caused by LRA for case pr54713-1.c

[Bug target/60298] [ARM/Thumb1] ICE caused by LRA for case pr54713-1.c

[terry.guo at arm dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60298

--- Comment #1 from Terry Guo <terry.guo at arm dot com> ---
I did a little investigation and think the issue may be related to following
code from function remove_some_program_points_and_update_live_ranges:

782      max_regno = max_reg_num ();
783      for (i = FIRST_PSEUDO_REGISTER; i < (unsigned) max_regno; i++)
784        {
785          for (r = lra_reg_info[i].live_ranges; r != NULL; r = r->next)
786        {
787          lra_assert (r->start <= r->finish);
788          bitmap_set_bit (born, r->start);
789          bitmap_set_bit (dead, r->finish);
790        }
791        }

The max_regno is 575, while the length of array lra_reg_info is just 568. When
the loop index i is 568, the issue is triggered.

[Bug target/60298] [ARM/Thumb1] ICE caused by LRA for case pr54713-1.c

[vmakarov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60298

--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Fri Feb 21 21:23:48 2014
New Revision: 208023

URL: http://gcc.gnu.org/viewcvs?rev=208023&root=gcc&view=rev
Log:
2014-02-21  Vladimir Makarov  <vmakarov@redhat.com>

    PR target/60298
    * lra-constraints.c (inherit_reload_reg): Use lra_emit_move
    instead of emit_move_insn.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lra-constraints.c

[Bug target/60298] [ARM/Thumb1] ICE caused by LRA for case pr54713-1.c

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60298

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |ramana at gcc dot gnu.org
         Resolution|---                         |FIXED
   Target Milestone|---                         |4.9.0

--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Fixed as per Vlad's last comment.