[Bug target/20020] x86_64 - 128 bit structs not targeted to TImode

[gary at intrepid dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20020

--- Comment #10 from Gary Funck <gary at intrepid dot com> 2011-07-08 16:58:55 UTC ---
Note: I don't know how this fix fits in with the x86_64 ABI, and obviously once
this fix is in place, the binary call interface will change for 128 bit
struct/union arguments.  As noted in the previous reply, expand_call tried
passing the argument (of TImode) in an XFmode (SSE) register.  That may or may
not be permitted by the call ABI.