[Bug middle-end/53541] gcc-4.6.2 segfaults on dumping tree information

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53541

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-31 
15:02:00 UTC ---
Hm, we dump from remove_bb - such BB can obviously contain invalid stmts.  The
4.7 branch has

                  /* Released SSA_NAMES have no TREE_TYPE.  */
                  && TREE_TYPE (TREE_OPERAND (op0, 0)) != NULL_TREE

in the dumping code.