I've forgot if someone mentioned whether we have a test-case in
our test-suite for this feature.
I'm looking thru gcc/testsuite/*.c to see if I can spot anything. It's
not easy since there is a lot of asm and the people who write these
are apparently allergic to using comments to describe what they are
testing.
So, I found a few tests that were *using* this feature. But they seem
to be checking for an ICE or page fault, rather than checking to see if
the generated code was avoiding the memory clobber.
dw
