https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81437
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |8.2.0, 9.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
GCC 9 prints the two warnings below with -m64 as well as -m32. GCC 8.2.0
prints them too but only in LP64 mode. With -m32, it only warns about g.
$ gcc -O2 -S -Wall -m32 a.c
a.c: In function ‘g’:
a.c:12:3: warning: ‘__builtin_memcpy’ forming offset 5 is out of the bounds [0,
4] of object ‘a’ with type ‘const char[4]’ [-Warray-bounds]
12 | __builtin_memcpy (d, a + 4, n); // missing warning
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.c:10:14: note: ‘a’ declared here
10 | const char a[] = "123";
| ^
a.c: In function ‘f’:
a.c:5:3: warning: ‘__builtin_memcpy’ forming offset [5, 2147483651] is out of
the bounds [0, 4] of object ‘a’ with type ‘const char[4]’ [-Warray-bounds]
5 | __builtin_memcpy (d, a + 4, n); // warning (ok)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.c:3:14: note: ‘a’ declared here
3 | const char a[] = "123";
| ^
