[Bug sanitizer/63638] [4.9 Regression] internal compiler error: in asan_expand_check_ifn (with -fsanitize=address)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63638

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looks good, but please include the testcase for the testsuite (you can use
__builtin_memcpy or declare
extern
#ifdef __cplusplus
"C"
#endif
void *memcpy (void *, const void *, __SIZE_TYPE__);
), the testcase should go to trunk too.