[Bug c++/84136] [6/7/8 Regression] ICE when woking with labels as values

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84136

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-01-30
                 CC|                            |dmalcolm at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |dmalcolm at gcc dot gnu.org
            Summary|Compilation aborted when    |[6/7/8 Regression] ICE when
                   |woking with labels as       |woking with labels as
                   |values                      |values
     Ever confirmed|0                           |1

--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Thanks for filing this bug report.

Confirmed; affects both C and C++ FEs.

This assertion is failing in find_taken_edge_computed_goto:

2384          gcc_assert (e != NULL);

(gdb) p val
$3 = <label_decl 0x7ffff19fd400 l>
(gdb) p dest
$4 = <basic_block 0x7ffff18b89c0 (3)>
(gdb) p e
$5 = <edge 0x0>

Started with r210492 (and hence affects from gcc 8 back to at least gcc 5).

Am investigating.