[Bug middle-end/46885] [4.6 Regression] ICE: in gsi_insert_seq_nodes_after, at gimple-iterator.c:251 with -ftree-parallelize-loops -g

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46885

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-13 
15:48:16 UTC ---
Created attachment 22742
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22742
gcc46-pr46885.patch

Untested fix.

When bumping in latch, create_iv inserts the new stmt after the given position
instead of before it, which ICEs if the bb contains just debug stmts.  When
inserting after the last stmt, we should just use gsi_last_bb.