[Bug middle-end/70239] [6 Regression] ICE in ggc_set_mark

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70239

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
And indeed
--- tree-ssa-sccvn.c.jj 2016-02-16 16:14:43.000000000 +0100
+++ tree-ssa-sccvn.c    2016-03-15 13:02:40.876997092 +0100
@@ -407,7 +407,7 @@ VN_INFO_GET (tree name)
   newinfo = XOBNEW (&vn_ssa_aux_obstack, struct vn_ssa_aux);
   memset (newinfo, 0, sizeof (struct vn_ssa_aux));
   if (SSA_NAME_VERSION (name) >= vn_ssa_aux_table.length ())
-    vn_ssa_aux_table.safe_grow (SSA_NAME_VERSION (name) + 1);
+    vn_ssa_aux_table.safe_grow_cleared (SSA_NAME_VERSION (name) + 1);
   vn_ssa_aux_table[SSA_NAME_VERSION (name)] = newinfo;
   return newinfo;
 }
fixes the ICE.