[Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82044

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Nov 22 09:08:23 2017
New Revision: 255048

URL: https://gcc.gnu.org/viewcvs?rev=255048&root=gcc&view=rev
Log:
        PR rtl-optimization/82044
        PR tree-optimization/82042
        * dse.c (record_store): Check for overflow.
        (check_mem_read_rtx): Properly check for overflow if width == -1, call
        add_wild_read instead of clear_rhs_from_active_local_stores on
        overflow and log it into dump_file.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dse.c