[patch]: Add support of new __int128 type for targets having 128-bit integer scalar support

[Jason Merrill]

On 05/25/2010 11:06 AM, Kai Tietz wrote:
> PS: I see that this patch shows an new failure in g++.dg/init/enum1.C.
> This test needs some modification, so that it won't run if int128.c is
> supported, as for this a wide-enough integer scalar type is present to
> hold the LL value.

So, how do you write the largest unsigned __int128 as a literal?

Incidentally, you don't need D_EXT on the __int128 keyword since it has 
the __ prefix.

Also, there should be a mangling test in g++.dg/abi and a demangling 
test in libiberty/testsuite/demangle-expected.

Jason