[Bug tree-optimization/53663] 4.7 inconsistent inline handling of bool within union

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53663

--- Comment #10 from Mikael Pettersson <mikpe at it dot uu.se> 2012-09-23 22:12:07 UTC ---
Although -fno-tree-fre works for the test case in #c3, adjusting it to use
__builtin_memcpy() for the assignment in f() results in wrong code even with
-fno-tree-fre.

The bug seems _Bool-specific. Replacing the _Bool with unsigned char b:1 gives
working code regardless of compiler options.