re PR tree-optimization/69141 (-O2 -fdump-tree-fre ICEs)

	PR tree-optimization/69141
	* tree-ssa-pre.c: Include langhooks.h.
	(eliminate_dom_walker::before_dom_children): Use
	lang_hooks.decl_printable_name instead of
	cgraph_node::get ()->name ().

	* g++.dg/opt/pr69141.C: New test.

From-SVN: r232123

gcc/ChangeLog

 2016-01-07  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/69141
+	* tree-ssa-pre.c: Include langhooks.h.
+	(eliminate_dom_walker::before_dom_children): Use
+	lang_hooks.decl_printable_name instead of
+	cgraph_node::get ()->name ().
+
 	PR middle-end/68960
 	* gimple-expr.c (copy_var_decl): If var has DECL_USER_ALIGN set, copy
 	it and DECL_ALIGN too.

gcc/testsuite/ChangeLog

+2016-01-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/69141
+	* g++.dg/opt/pr69141.C: New test.
+
 2016-01-06  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/sparc/20151219-1.c: Skip in 64-bit mode.

gcc/testsuite/g++.dg/opt/pr69141.C

+// PR tree-optimization/69141
+// { dg-do compile }
+// { dg-options "-O2 -fdump-tree-fre" }
+
+struct B
+{
+  B *b;
+  B ();
+  virtual void f () = 0;
+};
+
+B::B () : b (this)
+{
+  b->f ();
+}

gcc/tree-ssa-pre.c

@@ -52,6 +52,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-ssa-propagate.h"
 #include "ipa-utils.h"
 #include "tree-cfgcleanup.h"
+#include "langhooks.h"
 
 /* TODO:
 
@@ -4328,7 +4329,7 @@ eliminate_dom_walker::before_dom_children (basic_block b)
 		      dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, loc,
 				       "converting indirect call to "
 				       "function %s\n",
-				       cgraph_node::get (fn)->name ());
+				       lang_hooks.decl_printable_name (fn, 2));
 		    }
 		  gimple_call_set_fndecl (call_stmt, fn);
 		  maybe_remove_unused_call_args (cfun, call_stmt);