Support for type dynamic in VM

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 115 matching lines @@
   const Register kInstanceReg = RAX;
   // 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.
+    // dynamic type argument, check only classes.
     // 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.IsListInterface()) {
       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 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));
     ASSERT(!tp_argument.IsMalformed());
     if (tp_argument.IsType()) {
       ASSERT(tp_argument.HasResolvedTypeClass());
       // Check if type argument is dynamic or Object.
       const Type& object_type = Type::Handle(Type::ObjectType());
       if (object_type.IsSubtypeOf(tp_argument, NULL)) {
         // Instance class test only necessary.
@@ skipping 140 matching lines @@
     Label* is_not_instance_lbl) {
   ASSERT(!type.IsInstantiated());
   // Skip check if destination is a dynamic type.
   const Immediate raw_null =
       Immediate(reinterpret_cast<intptr_t>(Object::null()));
   if (type.IsTypeParameter()) {
     const TypeParameter& type_param = TypeParameter::Cast(type);
     // Load instantiator (or null) and instantiator type arguments on stack.
     __ movq(RDX, Address(RSP, 0));  // Get instantiator type arguments.
     // RDX: instantiator type arguments.
-    // Check if type argument is Dynamic.
+    // Check if type argument is dynamic.
     __ cmpq(RDX, raw_null);
     __ j(EQUAL, is_instance_lbl);
     // Can handle only type arguments that are instances of TypeArguments.
     // (runtime checks canonicalize type arguments).
     Label fall_through;
     __ CompareClassId(RDX, kTypeArgumentsCid);
     __ j(NOT_EQUAL, &fall_through);
     __ movq(RDI,
         FieldAddress(RDX, TypeArguments::type_at_offset(type_param.index())));
     // RDI: Concrete type of type.
@@ skipping 125 matching lines @@
   ASSERT(type.IsFinalized() && !type.IsMalformed());
 
   const Immediate raw_null =
       Immediate(reinterpret_cast<intptr_t>(Object::null()));
   Label is_instance, is_not_instance;
   __ pushq(RCX);  // Store instantiator on stack.
   __ pushq(RDX);  // Store instantiator type arguments.
   // If type is instantiated and non-parameterized, we can inline code
   // checking whether the tested instance is a Smi.
   if (type.IsInstantiated()) {
-    // A null object is only an instance of Object and Dynamic, which has
+    // A null object is only an instance of Object and dynamic, which has
     // already been checked above (if the type is instantiated). So we can
     // return false here if the instance is null (and if the type is
     // instantiated).
     // We can only inline this null check if the type is instantiated at compile
     // time, since an uninstantiated type at compile time could be Object or
-    // Dynamic at run time.
+    // dynamic at run time.
     __ cmpq(RAX, raw_null);
     __ j(EQUAL, &is_not_instance);
   }
 
   // Generate inline instanceof test.
   SubtypeTestCache& test_cache = SubtypeTestCache::ZoneHandle();
   test_cache = GenerateInlineInstanceof(token_pos, type,
                                         &is_instance, &is_not_instance);
 
   // test_cache is null if there is no fall-through.
@@ skipping 865 matching lines @@
 void ParallelMoveResolver::Exchange(const Address& mem1, const Address& mem2) {
   __ Exchange(mem1, mem2);
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64