Unwrap TypeRef returned by InstantiateFrom in AssertAssignableInstr::Canonicalize.

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 2623 matching lines @@
                         Value* value,
                         Value* instantiator_type_arguments,
                         const AbstractType& dst_type,
                         const String& dst_name,
                         intptr_t deopt_id)
       : TemplateDefinition(deopt_id),
         token_pos_(token_pos),
         dst_type_(AbstractType::ZoneHandle(dst_type.raw())),
         dst_name_(dst_name) {
     ASSERT(!dst_type.IsNull());
+    ASSERT(!dst_type.IsTypeRef());
     ASSERT(!dst_name.IsNull());
     SetInputAt(0, value);
     SetInputAt(1, instantiator_type_arguments);
   }
 
   DECLARE_INSTRUCTION(AssertAssignable)
   virtual CompileType ComputeType() const;
   virtual bool RecomputeType();
 
   Value* value() const { return inputs_[0]; }
   Value* instantiator_type_arguments() const { return inputs_[1]; }
 
   virtual TokenPosition token_pos() const { return token_pos_; }
   const AbstractType& dst_type() const { return dst_type_; }
   void set_dst_type(const AbstractType& dst_type) {
+    ASSERT(!dst_type.IsTypeRef());
     dst_type_ = dst_type.raw();
   }
   const String& dst_name() const { return dst_name_; }
 
   virtual bool CanDeoptimize() const { return true; }
 
   virtual bool CanBecomeDeoptimizationTarget() const {
     // AssertAssignable instructions that are specialized by the optimizer
     // (e.g. replaced with CheckClass) need a deoptimization descriptor before.
     return true;
@@ skipping 5538 matching lines @@
   LocationSummary* Name::MakeLocationSummary(Zone* zone, bool opt) const {    \
     UNIMPLEMENTED();                                                          \
     return NULL;                                                              \
   }                                                                           \
   void Name::EmitNativeCode(FlowGraphCompiler* compiler) { UNIMPLEMENTED(); }
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_