[turbofan] Skip JSCallReducer and JSNativeContextSpecialization on asm.js.

src/compiler/js-native-context-specialization.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
 #define V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/deoptimize-reason.h"
@@ skipping 22 matching lines @@
 // Specializes a given JSGraph to a given native context, potentially constant
 // folding some {LoadGlobal} nodes or strength reducing some {StoreGlobal}
 // nodes.  And also specializes {LoadNamed} and {StoreNamed} nodes according
 // to type feedback (if available).
 class JSNativeContextSpecialization final : public AdvancedReducer {
  public:
   // Flags that control the mode of operation.
   enum Flag {
     kNoFlags = 0u,
     kAccessorInliningEnabled = 1u << 0,
-    kBailoutOnUninitialized = 1u << 1,
-    kDeoptimizationEnabled = 1u << 2,
+    kBailoutOnUninitialized = 1u << 1
   };
   typedef base::Flags<Flag> Flags;
 
   JSNativeContextSpecialization(Editor* editor, JSGraph* jsgraph, Flags flags,
                                 Handle<Context> native_context,
                                 CompilationDependencies* dependencies,
                                 Zone* zone);
 
   Reduction Reduce(Node* node) final;
 
@@ skipping 142 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(JSNativeContextSpecialization);
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(JSNativeContextSpecialization::Flags)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_NATIVE_CONTEXT_SPECIALIZATION_H_