Is Non-Blocking cache supported in GCC?

["Amker.Cheng" <amker dot cheng at gmail dot com>]

Hi all:
    Recently I found two relative old papers about non-blocking cache,
etc. which are :

        1) Reducing memory latency via non-blocking and prefetching
caches.  BY Tien-Fu Chen and Jean-Loup Baer.
        2) Data Prefetching:A Cost/Performance Analysis   BY Chris Metcalf

It seems the hardware facility does have the potential to improve the
performance with
compiler's assistance(especially instruction scheduling). while on the
other hand, lifting ahead
load instructions may resulting in increasing register pressure.

So I'm thinking :
1, Has anyone from gcc folks done any investigation on this topic yet,
or any statistic data based on gcc available?
2, Does GCC(in any release version) supports it in any targets(such as
mips 24ke) with this hardware feature?
    If not currently, does it possible to support it by using target
definition macros and functions?

Any tips will be highly appreciated, thanks.
-- 
Best Regards.