[Bug target/50038] redundant zero extensions

[tocarip.intel at gmail dot com]

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

--- Comment #5 from tocarip.intel at gmail dot com 2011-10-04 09:52:03 UTC ---
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?