[Bug tree-optimization/71433] [7 Regression] -Warray-bounds false positive with -O2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71433

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Jan 27 12:30:43 2017
New Revision: 244974

URL: https://gcc.gnu.org/viewcvs?rev=244974&root=gcc&view=rev
Log:
2017-01-27  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/71433
        * tree-vrp.c (register_new_assert_for): Revert earlier changes.
        (compare_assert_loc): New function.
        (process_assert_insertions): Sort and optimize assert locations
        to remove duplicates and push down identical assertions on
        edges to their destination block.

        * gcc.dg/Warray-bounds-21.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/Warray-bounds-21.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c