Bug 4228 can be fixed.

[arbonline]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=4228&database=gcc 
< http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=4228&database=gcc >

The bug 4228 is produced in the file gcc/config/i386/i386.md. I don't 
know why but if you coment the sections: "Convert setcc + movzbl to xor 
+ setcc if operands don't overlap" at lines 9598 and 12600 the problem 
disapears. I supose that this lines are wrong but I'm not sure.

Ian Blanes.