http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46942
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2011-01-02 20:53:12 UTC --- (In reply to comment #5) > And upper 32 bits are undefined if the argument is 8/16/32 bit (i.e. callee > must sign/zero extend, instead of caller)? If callee wants 64bit, it has to sign/zero extend it to 64bit.
