> Huh?  You can also look at TREE_CODE (type) == VECTOR_TYPE etc.

Right.  Is the attached patch ok?  It was bootstrapped/regtested 
i686-pc-linux-gnu, where it fixes the failure in i386-sse-5.c, and seems 
to fix darwin-abi-2.c as well with a cross to powerpc-apple-darwin7.4.0.

I won't be able to apply it until August 2nd.

Thanks again for reviewing the rest of this work.

Paolo