[Bug tree-optimization/55079] [4.8 regression] false positive -Warray-bounds (also seen at -O3 bootstrap)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55079

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-11 10:06:20 UTC ---
Author: rguenth
Date: Tue Dec 11 10:06:15 2012
New Revision: 194388

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194388
Log:
2012-12-11  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/55079
    * tree-vrp.c (extract_range_from_binary_expr_1): Handle MAX/MIN_EXPR
    for more cases.
    (register_edge_assert_for_2): Register asserts for post-in/decrement
    tests.
    (check_array_ref): Dump what expression we emit array bound
    warnings for.
    (search_for_addr_array): Likewise.

    * gcc.dg/Warray-bounds-9.c: New testcase.
    * gcc.dg/Warray-bounds-10.c: Likewise.
    * gcc.dg/tree-ssa/ssa-pre-1.c: Adjust.

Added:
    trunk/gcc/testsuite/gcc.dg/Warray-bounds-10.c
    trunk/gcc/testsuite/gcc.dg/Warray-bounds-9.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c