[Bug tree-optimization/50133] [4.7 Regression] ICE: SIGSEGV in vect_finish_stmt_generation (gimple.h:4821) with -ftree-vectorize -fno-tree-loop-im

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50133

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-08-21 17:43:08 UTC ---
Insert before gsi_end_p should be fine, you just can't copy locus from it in
that case.  So you could as well do something like:
  si = *gsi;
  if (gsi_end_p (si))
    {
      gsi_prev (&si);
      gsi_prev_nondebug (&si);
    }
  else if (is_gimple_debug (gsi_stmt (si)))
    {
      gsi_next_nondebug (&si);
      gcc_assert (!gsi_end_p (si));
    }

where the first gsi_prev would move from the end to the newly inserted stmt and
gsi_prev_nondebug to the previous stmt (skipping any debug stmts).
This wouldn't work when inserting into a completely empty bb, but does the
vectorizer ever do something like that?