[Bug middle-end/89957] ICE calling strnlen with an int128_t bound in a known range

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89957

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr  4 22:38:10 2019
New Revision: 270154

URL: https://gcc.gnu.org/viewcvs?rev=270154&root=gcc&view=rev
Log:
PR middle-end/89957 - ICE calling strnlen with an int128_t bound in a known
range
PR middle-end/89911 - [9 Regression] ICE in get_attr_nonstring_decl

gcc/ChangeLog:

        PR middle-end/89957
        PR middle-end/89911
        * builtins.c (expand_builtin_strnlen): Make sure wi::ltu_p operands
        have the same precision since the function crashes otherwise.
        * calls.c (maybe_warn_nonstring_arg): Avoid assuming strnlen() call
        has non-zero arguments.

gcc/testsuite/ChangeLog:

        PR middle-end/89957
        PR middle-end/89911
        * gcc.dg/Wstringop-overflow-13.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/calls.c
    trunk/gcc/testsuite/ChangeLog