[Bug tree-optimization/82608] missing -Warray-bounds on an out-of-bounds VLA index

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82608

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Nov  5 17:05:33 2019
New Revision: 277854

URL: https://gcc.gnu.org/viewcvs?rev=277854&root=gcc&view=rev
Log:
PR middle-end/92333 - missing variable name referencing VLA in warnings
PR middle-end/82608 - missing -Warray-bounds on an out-of-bounds VLA index

gcc/testsuite/ChangeLog:

        PR middle-end/92333
        PR middle-end/82608
        * gcc.dg/Warray-bounds-51.c: New test.

gcc/ChangeLog:

        PR middle-end/92333
        PR middle-end/82608
        * tree-vrp.c (vrp_prop::check_array_ref): Handle VLAs with constant
        size.
        * tree-ssa-ccp.c (fold_builtin_alloca_with_align): Use a meaninful
        name and location for a temporary variable.


Added:
    trunk/gcc/testsuite/gcc.dg/Warray-bounds-51.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c
    trunk/gcc/tree-vrp.c