[Bug tree-optimization/56398] [4.8 Regression] ICE (Segmentation fault) in dominated_by_p

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56398



--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-20 
10:06:35 UTC ---

Fix:



Index: gcc/tree-vect-loop-manip.c

===================================================================

--- gcc/tree-vect-loop-manip.c  (revision 196167)

+++ gcc/tree-vect-loop-manip.c  (working copy)

@@ -187,6 +187,7 @@ adjust_debug_stmts (tree from, tree to,



   if (MAY_HAVE_DEBUG_STMTS

       && TREE_CODE (from) == SSA_NAME

+      && ! SSA_NAME_IS_DEFAULT_DEF (from)

       && ! virtual_operand_p (from))

     {

       ai.from = from;



default defs are dominating all uses, so in adjust_debug_stmts_now we

wouldn't do anything for them.  Thus, just ignore them.