[Bug rtl-optimization/61058] [4.8/4.9 Regression] ICE: RTL check: expected elt 3 type 'B', have '0' (rtx barrier) in distance_agu_use_in_bb, at config/i386/i386.c:16740 with __builtin_unreachable()

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61058

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Feb  1 21:56:03 2015
New Revision: 220336

URL: https://gcc.gnu.org/viewcvs?rev=220336&root=gcc&view=rev
Log:
    Backported from mainline
    2015-01-27  Jakub Jelinek  <jakub@redhat.com>

    PR rtl-optimization/61058
    * jump.c (cleanup_barriers): Update basic block boundaries
    if BLOCK_FOR_INSN is non-NULL on PREV.

    * gcc.dg/pr61058.c: New test.

    2013-04-16  Steven Bosscher  <steven@gcc.gnu.org>

    PR middle-end/43631
    * jump.c (cleanup_barriers): Use reorder_insns_nobb to avoid making
    the moved barrier the tail of the basic block it follows.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr61058.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/jump.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog