target/8087: sparc-sun-solaris2.7 C testsuite failures in execute/20020720-1.c w/-m64 or on sparcv9/sparc64

[davem@gcc.gnu.org]

Synopsis: sparc-sun-solaris2.7 C testsuite failures in execute/20020720-1.c w/-m64 or on sparcv9/sparc64

State-Changed-From-To: open->analyzed
State-Changed-By: davem
State-Changed-When: Mon Sep 30 15:52:04 2002
State-Changed-Why:
    The problem is, it's REALLY REALLY expensive to set the
    float condition codes to a constant value (two FPU synchronizing memory operations).
    
    If I implement these patterns, will they actually be output
    ever?
    
    I think it's really totally silly to require a backend
    to implement these patterns.  I can think of a few other
    platforms where this is quite expensive.
    
    Is there some way to remove the requirement?
    
    Has the compiler documentation been updated to reflect
    this new pattern requirement?

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8087