r262859 - in /branches/gcc-8-branch/gcc: Change...

[msebor@gcc.gnu.org]

Author: msebor
Date: Wed Jul 18 17:20:05 2018
New Revision: 262859

URL: https://gcc.gnu.org/viewcvs?rev=262859&root=gcc&view=rev
Log:
Backport from trunk.

PR middle-end/85602 - -Wsizeof-pointer-memaccess for strncat with size of source

gcc/c-family/ChangeLog:

	PR middle-end/85602
	* c-warn.c (sizeof_pointer_memaccess_warning): Check for attribute
	nonstring.

gcc/ChangeLog:

	PR middle-end/85602
	* calls.c (maybe_warn_nonstring_arg): Handle strncat.
	* tree-ssa-strlen.c (is_strlen_related_p): Make extern.
	Handle integer subtraction.
	(maybe_diag_stxncpy_trunc): Handle nonstring source arguments.
	* tree-ssa-strlen.h (is_strlen_related_p): Declare.
	* doc/invoke.texi (-Wstringop-truncation): Update.

gcc/testsuite/ChangeLog:

	PR middle-end/85602
	* gcc.dg/attr-nonstring-2.c: Adjust text of expected warning.
	* c-c++-common/attr-nonstring-8.c: New test.


Added:
    branches/gcc-8-branch/gcc/testsuite/c-c++-common/attr-nonstring-8.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/c-family/ChangeLog
    branches/gcc-8-branch/gcc/c-family/c-warn.c
    branches/gcc-8-branch/gcc/calls.c
    branches/gcc-8-branch/gcc/doc/invoke.texi
    branches/gcc-8-branch/gcc/testsuite/ChangeLog
    branches/gcc-8-branch/gcc/tree-ssa-strlen.c
    branches/gcc-8-branch/gcc/tree-ssa-strlen.h