optimization/4079: unnecessary register move on simple code

[dje@gcc.gnu.org]

Synopsis: unnecessary register move on simple code

Responsible-Changed-From-To: unassigned->dje
Responsible-Changed-By: dje
Responsible-Changed-When: Fri Dec 28 10:19:58 2001
Responsible-Changed-Why:
    PowerPC issue
State-Changed-From-To: open->suspended
State-Changed-By: dje
State-Changed-When: Fri Dec 28 10:19:58 2001
State-Changed-Why:
    This is a known optimization problem involving parameter and
    return registers.  It should be resolved when the cprop and
    new register allocator optimizations are enabled.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4079