[Bug tree-optimization/69740] [5/6 Regression] gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "verify_loop_structure"

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69740

--- Comment #12 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Mon Mar  7 17:01:54 2016
New Revision: 234036

URL: https://gcc.gnu.org/viewcvs?rev=234036&root=gcc&view=rev
Log:
        PR tree-optimization/69740
        * cfghooks.c (remove_edge): Request loop fixups if we delete
        an edge that might turn an irreducible loop into a natural
        loop.
        * cfgloop.h (check_verify_loop_structure): Clear LOOPS_NEED_FIXUP.
        Move after definition of loops_state_clear.

        PR tree-optimization/69740
        * gcc.c-torture/compile/pr69740-1.c: New test.
        * gcc.c-torture/compile/pr69740-2.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr69740-1.c
    trunk/gcc/testsuite/gcc.c-torture/compile/pr69740-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfghooks.c
    trunk/gcc/cfgloop.h
    trunk/gcc/testsuite/ChangeLog