[Bug middle-end/83164] [8 regression] internal compiler error: verify_gimple failed

["dmalcolm at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83164

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

           What    |Removed                     |Added
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                 CC|                            |dmalcolm at gcc dot gnu.org

--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Gerald Pfeifer from comment #0)
[...]
> Also the diagnostics look quite odd, don't they?
[...]

If I strip out the line directives from the .i file, then I get:

ddeml.i:8322:28: error: type mismatch in pointer diff expression
 static struct ddeml_thunk* DDEML_AddThunk(DWORD instId, DWORD pfn16)
                            ^~~~~~~~~~~~~~

from this line in tree-cfg.c:

3996                error ("type mismatch in pointer diff expression");

which is less odd (though not great).

If I use stmt->location for the diagnostic (rather than the implicit use of
input_location), then I get the much more useful:

(gdb) call inform (stmt->location, "")
ddeml.i: In function ‘DDEML_AddThunk’:
ddeml.i:8342:61: note: 
             thunk->callback = (char *)WDML_InvokeCallback16 - (char
*)(&thunk->callback + 1);
                              
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~