[Bug target/51643] Incorrect code produced for tail-call of weak function with -O2/-O3 option

[sipych at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51643

--- Comment #3 from Alexander Osipenko <sipych at gmail dot com> 2011-12-20 
21:39:11 UTC ---
This behavior is explicitly defined in ARM RealView compiler, and GCC seems try
to follow this convention.