c/8339: insn does not satisfy its constraints

[Jason Borden]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8339

I just thought that I'd add to this bug, since I've had the same issue. The 
problem seems to be caused by the -mfpmath=sse flag in combination with the 
pentium4 (as far as I can tell). I've run into this bug only twice. Once when 
compiling the gsmatrix.c file previously mentioned and the other when 
compiling postgresql-7.2.3, the src/backend/utils/adt/float.c file. I've 
compiled these same files on a pentium3 (using -march=pentium3 and no -sse2) 
and on an athlon-xp (using -march=athlon-xp and no -sse2, but also having 
-m3dnow) and the bug does not occur in these situations. I've reproduced this 
bug on pentium4 and pentium4-m (mobile) processors. Hope this information 
will be of help.

Jason