[interpreter]: Fix interpreter handler table initialization.

src/interpreter/interpreter.cc

 // 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.
 
 #include "src/interpreter/interpreter.h"
 
 #include "src/compiler.h"
 #include "src/compiler/interpreter-assembler.h"
 #include "src/factory.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 13 matching lines @@
 
 // static
 Handle<FixedArray> Interpreter::CreateUninitializedInterpreterTable(
     Isolate* isolate) {
   Handle<FixedArray> handler_table = isolate->factory()->NewFixedArray(
       static_cast<int>(Bytecode::kLast) + 1, TENURED);
   // We rely on the interpreter handler table being immovable, so check that
   // it was allocated on the first page (which is always immovable).
   DCHECK(isolate->heap()->old_space()->FirstPage()->Contains(
       handler_table->address()));
-  for (int i = 0; i < static_cast<int>(Bytecode::kLast); i++) {
-    handler_table->set(i, isolate->builtins()->builtin(Builtins::kIllegal));
-  }
   return handler_table;
 }
 
 
 void Interpreter::Initialize() {
   DCHECK(FLAG_ignition);
   Handle<FixedArray> handler_table = isolate_->factory()->interpreter_table();
   if (!IsInterpreterTableInitialized(handler_table)) {
     Zone zone;
     HandleScope scope(isolate_);
 
 #define GENERATE_CODE(Name, ...)                                      \
     {                                                                 \
       compiler::InterpreterAssembler assembler(isolate_, &zone,       \
                                                Bytecode::k##Name);    \
       Do##Name(&assembler);                                           \
       Handle<Code> code = assembler.GenerateCode();                   \
       handler_table->set(static_cast<int>(Bytecode::k##Name), *code); \
     }
     BYTECODE_LIST(GENERATE_CODE)
 #undef GENERATE_CODE
   }
 }
 
 
 bool Interpreter::IsInterpreterTableInitialized(
     Handle<FixedArray> handler_table) {
   DCHECK(handler_table->length() == static_cast<int>(Bytecode::kLast) + 1);
-  return handler_table->get(0) ==
-         isolate_->builtins()->builtin(Builtins::kIllegal);
+  return handler_table->get(0) != isolate_->heap()->undefined_value();
 }
 
 
 // LdaZero
 //
 // Load literal '0' into the accumulator.
 void Interpreter::DoLdaZero(compiler::InterpreterAssembler* assembler) {
   // TODO(rmcilroy) Implement.
   __ Dispatch();
 }
@@ skipping 111 matching lines @@
 //
 // Return the value in register 0.
 void Interpreter::DoReturn(compiler::InterpreterAssembler* assembler) {
   __ Return();
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8