[Bug middle-end/80669] [8 Regression] Bad -Wstringop-overflow warnings for stpncpy

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80669

--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Sun May 14 16:06:41 2017
New Revision: 248034

URL: https://gcc.gnu.org/viewcvs?rev=248034&root=gcc&view=rev
Log:
PR middle-end/80669 - Bad -Wstringop-overflow warnings for stpncpy

gcc/ChangeLog:

        PR middle-end/80669
        * builtins.c (expand_builtin_stpncpy): Simplify.

gcc/testsuite/ChangeLog:

        PR middle-end/80669
        * gcc.dg/builtin-stpncpy.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/builtin-stpncpy.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/testsuite/ChangeLog