[Bug middle-end/60482] Loop optimization regression

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60482

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Mar 12 09:15:08 2014
New Revision: 208506

URL: http://gcc.gnu.org/viewcvs?rev=208506&root=gcc&view=rev
Log:
    PR middle-end/60482
    * tree-vrp.c (register_edge_assert_for_1): Don't add assert
    if there are multiple uses, but op doesn't live on E edge.
    * tree-cfg.c (assert_unreachable_fallthru_edge_p): Also ignore
    clobber stmts before __builtin_unreachable.

    * gcc.dg/vect/pr60482.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr60482.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-vrp.c