[Bug c/85931] -Wsizeof-pointer-memaccess for strncpy with size of source

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85931

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Jun 12 17:14:31 2018
New Revision: 261515

URL: https://gcc.gnu.org/viewcvs?rev=261515&root=gcc&view=rev
Log:
PR c/85931 -  -Wsizeof-pointer-memaccess for strncpy with size of source

gcc/c-family/ChangeLog:

        PR c/85931
        * c-warn.c (sizeof_pointer_memaccess_warning): Avoid warning when
        sizeof source and destination yields the same value.

gcc/ChangeLog:

        PR c/85931
        * fold-const.c (operand_equal_p): Handle SAVE_EXPR.

gcc/testsuite/ChangeLog:

        PR c/85931
        * gcc.dg/Wstringop-truncation-3.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/Wstringop-truncation-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-warn.c
    trunk/gcc/fold-const.c
    trunk/gcc/testsuite/ChangeLog