devirt-46.C: New testcase.

	* g++.dg/ipa/devirt-46.C: New testcase.
	* ipa-prop.c (ipa_compute_jump_functions_for_edge): Call
	get_dynamic_type; drop TODO.
	* ipa-polymorphic-call.c
	(ipa_polymorphic_call_context::get_dynamic_type): Be ready
	for otr_type to be unknown.

From-SVN: r215890

gcc/ChangeLog

+2014-10-04  Jan Hubicka  <hubicka@ucw.cz>
+
+	* ipa-prop.c (ipa_compute_jump_functions_for_edge): Call
+	get_dynamic_type; drop TODO.
+	* ipa-polymorphic-call.c
+	(ipa_polymorphic_call_context::get_dynamic_type): Be ready
+	for otr_type to be unknown.
+
 2014-10-04  Trevor Saunders  <tsaunders@mozilla.com>
 
 	* common/config/score/score-common.c: Remove.

gcc/ipa-polymorphic-call.c

@@ -1390,12 +1390,13 @@ ipa_polymorphic_call_context::get_dynamic_type (tree instance,
      This is because we do not update INSTANCE when walking inwards.  */
   HOST_WIDE_INT instance_offset = offset;
 
+  if (otr_type)
     otr_type = TYPE_MAIN_VARIANT (otr_type);
 
   /* Walk into inner type. This may clear maybe_derived_type and save us
      from useless work.  It also makes later comparsions with static type
      easier.  */
-  if (outer_type)
+  if (outer_type && otr_type)
     {
       if (!restrict_to_inner_class (otr_type))
         return false;
@@ -1484,6 +1485,7 @@ ipa_polymorphic_call_context::get_dynamic_type (tree instance,
   /* We look for vtbl pointer read.  */
   ao.size = POINTER_SIZE;
   ao.max_size = ao.size;
+  if (otr_type)
     ao.ref_alias_set
       = get_deref_alias_set (TREE_TYPE (BINFO_VTABLE (TYPE_BINFO (otr_type))));
 

gcc/ipa-prop.c

@@ -1898,10 +1898,11 @@ ipa_compute_jump_functions_for_edge (struct func_body_info *fbi,
       tree param_type = ipa_get_callee_param_type (cs, n);
       if (flag_devirtualize && POINTER_TYPE_P (TREE_TYPE (arg)))
 	{
+	  tree instance;
 	  struct ipa_polymorphic_call_context context (cs->caller->decl,
 						       arg, cs->call_stmt,
-						       NULL);
-	  /* TODO: We should also handle dynamic types.  */
+						       &instance);
+	  context.get_dynamic_type (instance, arg, NULL, cs->call_stmt);
 	  *ipa_get_ith_polymorhic_call_context (args, n) = context;
 	  if (!context.useless_p ())
 	    useful_context = true;

gcc/testsuite/ChangeLog

+2014-10-04  Jan Hubicka  <hubicka@ucw.cz>
+
+	* g++.dg/ipa/devirt-46.C: New testcase.
+
 2014-10-04  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
 
 	PR fortran/36534

gcc/testsuite/g++.dg/ipa/devirt-46.C

+/* { dg-do compile } */
+/* { dg-options "-O3 -fno-ipa-cp -fdump-ipa-inline-details -fno-early-inlining -fdump-tree-optimized" } */
+struct A {
+   virtual int foo(){return 1;}
+};
+struct B:A {
+   virtual int foo(){return 2;}
+};
+static void
+test (struct A *a)
+{
+  if (a->foo() != 2)
+   __builtin_abort ();
+}
+int
+m()
+{
+  struct A *a = new B;
+  test (a);
+  return 0;
+}
+
+/* { dg-final { scan-ipa-dump-times "Discovered a virtual call to a speculative target\[^\\n\]*B::foo" 1 "inline"  } } */
+/* { dg-final { scan-ipa-dump-not "OBJ_TYPE_REF" "optimized"  } } */
+/* { dg-final { scan-ipa-dump-not "abort" "optimized"  } } */
+/* { dg-final { cleanup-ipa-dump "inline" } } */
+/* { dg-final { cleanup-ipa-dump "optimized" } } */