[Bug tree-optimization/64715] [5.0 regression] __builtin_object_size (..., 1) fails to locate subobject

[sch...@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64715

--- Comment #4 from Andreas Schwab <sch...@linux-m68k.org> ---
The original test case is already using the equivalent of &a.buf1[4], without
any intermediate variable.