[Bug target/50038] redundant zero extensions

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50038

--- Comment #6 from Uros Bizjak <ubizjak at gmail dot com> 2011-10-04 10:03:32 UTC ---
(In reply to comment #5)
> This patch is experimental and before sending it to patches mail-list i wanted
> to verify that at least the approach (modify implicit-zee pass and later enable
> it on 32bit x86) is correct. Should i just send experimental version?

Sure, but please mark it with [RFC] in the header.