[Bug middle-end/85359] duplicate -Wstringop-overflow for a strcmp call with a nonstring pointer

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85359

--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 22 19:37:48 2018
New Revision: 260550

URL: https://gcc.gnu.org/viewcvs?rev=260550&root=gcc&view=rev
Log:
PR middle-end/85359 - duplicate -Wstringop-overflow for a strcmp call with a
nonstring pointer

gcc/ChangeLog:

        PR middle-end/85359
        * builtins.c (expand_builtin_strcpy): Call maybe_warn_nonstring_arg
        only when expasion succeeds.
        (expand_builtin_strcmp): Same.
        (expand_builtin_strncmp): Same.

gcc/testsuite/ChangeLog:

        PR middle-end/85359
        * gcc.dg/attr-nonstring.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/attr-nonstring.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/calls.c
    trunk/gcc/testsuite/ChangeLog