[Bug c/59850] Support sparse-style pointer address spaces (type attributes)

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59850

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |dmalcolm at gcc dot gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
                 CC|                            |dmalcolm at gcc dot gnu.org
   Last reconfirmed|                            |2022-09-26

--- Comment #35 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Created attachment 53631
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53631&action=edit
Refreshed version of Tom Tromey's patch

This is a refreshed version of Tom Tromey's patch from 2014, against last
week's trunk (specifically, against dc829c7613ddf562d1aecaf22eda965e87108ac8).

The new tests pass; am currently attempting a bootstrap and full regression
test.

Has the same caveats that Tom noted in the earlier comments.