[Bug other/52944] [4.5/4.6 Regression] __builtin_object_size(..., 1) no longer returns (size_t)-1 for consecutive flexible/zero-length array members

[vapier at gentoo dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52944

--- Comment #4 from Mike Frysinger <vapier at gentoo dot org> 2012-04-12 
15:42:49 UTC ---
(In reply to comment #3)

wouldn't it though ?  there's still a top level union there surrounding all the
members.  so flattening it, i'd get three choices:
 - th_block; th_data
 - th_code; th_data
 - th_stuff

the problem before was that it was a union followed by th_data

testing locally with gcc-4.6.2, i get the object sizes of:
 - -O0: th_data:-1 th_stuff:-1
 - -O[s123]: th_data:96 th_stuff:98