optimization/7056: [ARM] zero extend code worse in 3.1 than 3.0

[rearnsha@gcc.gnu.org]

Synopsis: [ARM] zero extend code worse in 3.1 than 3.0

Responsible-Changed-From-To: unassigned->rearnsha
Responsible-Changed-By: rearnsha
Responsible-Changed-When: Mon Jul 29 09:36:09 2002
Responsible-Changed-Why:
    .
State-Changed-From-To: analyzed->closed
State-Changed-By: rearnsha
State-Changed-When: Mon Jul 29 09:36:09 2002
State-Changed-Why:
    A useful side-effect of this change:
    
    2002-07-22  Richard Earnshaw  <rearnsha@arm.com>
    
    	* arm.md (movqi): If optimizing and we can create pseudos, use
    	a ZERO_EXTEND to load from memory, then copy the result into the
    	target.
    	(movhi): Likewise, but only for ARMv4.
    
    is that this problem no-longer occurs.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7056