[Bug target/84988] Compiler hang in chkp_type_bounds_count for large arrays

marxin at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Tue Mar 20 11:51:00 GMT 2018


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84988

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-03-20
                 CC|                            |marxin at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, we should probably bound maximum size of an array that is checked:

  1736        for (cur = 0; cur <= TREE_INT_CST_LOW (maxval); cur++)
  1737          chkp_find_bound_slots_1 (etype, have_bound, offs + cur *
esize);

Note the MPX will be removed in next stage1. Thus I would suggest not to come
up with a param.

Let me cook a patch.


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