[Bug rtl-optimization/60866] [4.7/4.8/4.9 Regression] ICE: in get_seqno_for_a_jump, at sel-sched-ir.c:4068 with -fselective-scheduling -fno-if-conversion

["abel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60866

--- Comment #8 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
Author: abel
Date: Tue Jun  3 10:08:58 2014
New Revision: 211169

URL: http://gcc.gnu.org/viewcvs?rev=211169&root=gcc&view=rev
Log:
        Backport from mainline
        2014-05-14  Andrey Belevantsev  <abel@ispras.ru>

        PR rtl-optimization/60866
        * sel-sched-ir (sel_init_new_insn): New parameter old_seqno.
        Default it to -1.  Pass it down to init_simplejump_data.
        (init_simplejump_data): New parameter old_seqno.  Pass it down
        to get_seqno_for_a_jump.
        (get_seqno_for_a_jump): New parameter old_seqno.  Use it for
        initializing new jump seqno as a last resort.  Add comment.
        (sel_redirect_edge_and_branch): Save old seqno of the conditional
        jump and pass it down to sel_init_new_insn.
        (sel_redirect_edge_and_branch_force): Likewise.

    * gcc.dg/pr60866.c: New test.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr60866.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/sel-sched-ir.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog