Remove support for interfaces.

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 114 matching lines @@
   // A Smi object cannot be the instance of a parameterized class.
   __ testq(kInstanceReg, Immediate(kSmiTagMask));
   __ j(ZERO, is_not_instance_lbl);
   const AbstractTypeArguments& type_arguments =
       AbstractTypeArguments::ZoneHandle(type.arguments());
   const bool is_raw_type = type_arguments.IsNull() ||
       type_arguments.IsRaw(type_arguments.Length());
   if (is_raw_type) {
     const Register kClassIdReg = R10;
     // dynamic type argument, check only classes.
+    __ LoadClassId(kClassIdReg, kInstanceReg);
+    __ cmpl(kClassIdReg, Immediate(type_class.id()));
+    __ j(EQUAL, is_instance_lbl);
     // List is a very common case.
-    __ LoadClassId(kClassIdReg, kInstanceReg);
-    if (!type_class.is_interface()) {
-      __ cmpl(kClassIdReg, Immediate(type_class.id()));
-      __ j(EQUAL, is_instance_lbl);
-    }
     if (type_class.IsListClass()) {
       GenerateListTypeCheck(kClassIdReg, is_instance_lbl);
     }
     return GenerateSubtype1TestCacheLookup(
         token_pos, type_class, is_instance_lbl, is_not_instance_lbl);
   }
   // If one type argument only, check if type argument is Object or dynamic.
   if (type_arguments.Length() == 1) {
     const AbstractType& tp_argument = AbstractType::ZoneHandle(
         type_arguments.TypeAt(0));
@@ skipping 58 matching lines @@
                             TypeArguments::Handle(),
                             NULL)) {
     __ jmp(is_instance_lbl);
   } else {
     __ jmp(is_not_instance_lbl);
   }
   // Compare if the classes are equal.
   __ Bind(&compare_classes);
   const Register kClassIdReg = R10;
   __ LoadClassId(kClassIdReg, kInstanceReg);
-  // If type is an interface, we can skip the class equality check.
-  if (!type_class.is_interface()) {
-    __ cmpl(kClassIdReg, Immediate(type_class.id()));
-    __ j(EQUAL, is_instance_lbl);
-  }
+  __ cmpl(kClassIdReg, Immediate(type_class.id()));
+  __ j(EQUAL, is_instance_lbl);
   // Bool interface can be implemented only by core class Bool.
   // (see ClassFinalizer::ResolveInterfaces for list of restricted interfaces).
   if (type.IsBoolType()) {
     __ cmpl(kClassIdReg, Immediate(kBoolCid));
     __ j(EQUAL, is_instance_lbl);
     __ jmp(is_not_instance_lbl);
     return false;
   }
   if (type.IsFunctionType()) {
     // Check if instance is a closure.
@@ skipping 1175 matching lines @@
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   __ Exchange(mem1, mem2);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64