[Intepreter] Don't throw reference errors for globals in typeof.

src/interpreter/bytecode-array-builder.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/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 270 matching lines @@
 BytecodeArrayBuilder& BytecodeArrayBuilder::StoreAccumulatorInRegister(
     Register reg) {
   // TODO(oth): Avoid storing the accumulator in the register if the
   // previous bytecode loaded the accumulator with the same register.
   Output(Bytecode::kStar, reg.ToOperand());
   return *this;
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadGlobal(
-    size_t name_index, int feedback_slot, LanguageMode language_mode) {
-  Bytecode bytecode = BytecodeForLoadGlobal(language_mode);
+    size_t name_index, int feedback_slot, LanguageMode language_mode,
+    TypeofMode typeof_mode) {
+  // TODO(rmcilroy): Potentially store language and typeof information in an
+  // operand rather than having extra bytecodes.
+  Bytecode bytecode = BytecodeForLoadGlobal(language_mode, typeof_mode);
   if (FitsInIdx8Operand(name_index) && FitsInIdx8Operand(feedback_slot)) {
     Output(bytecode, static_cast<uint8_t>(name_index),
            static_cast<uint8_t>(feedback_slot));
   } else if (FitsInIdx16Operand(name_index) &&
              FitsInIdx16Operand(feedback_slot)) {
     Output(BytecodeForWideOperands(bytecode), static_cast<uint16_t>(name_index),
            static_cast<uint16_t>(feedback_slot));
   } else {
     UNIMPLEMENTED();
   }
@@ skipping 720 matching lines @@
     case Bytecode::kStoreICStrict:
       return Bytecode::kStoreICStrictWide;
     case Bytecode::kKeyedStoreICSloppy:
       return Bytecode::kKeyedStoreICSloppyWide;
     case Bytecode::kKeyedStoreICStrict:
       return Bytecode::kKeyedStoreICStrictWide;
     case Bytecode::kLdaGlobalSloppy:
       return Bytecode::kLdaGlobalSloppyWide;
     case Bytecode::kLdaGlobalStrict:
       return Bytecode::kLdaGlobalStrictWide;
+    case Bytecode::kLdaGlobalInsideTypeofSloppy:
+      return Bytecode::kLdaGlobalInsideTypeofSloppyWide;
+    case Bytecode::kLdaGlobalInsideTypeofStrict:
+      return Bytecode::kLdaGlobalInsideTypeofStrictWide;
     case Bytecode::kStaGlobalSloppy:
       return Bytecode::kStaGlobalSloppyWide;
     case Bytecode::kStaGlobalStrict:
       return Bytecode::kStaGlobalStrictWide;
     default:
       UNREACHABLE();
       return static_cast<Bytecode>(-1);
   }
 }
 
@@ skipping 58 matching lines @@
     case STRONG:
       UNIMPLEMENTED();
     default:
       UNREACHABLE();
   }
   return static_cast<Bytecode>(-1);
 }
 
 
 // static
-Bytecode BytecodeArrayBuilder::BytecodeForLoadGlobal(
-    LanguageMode language_mode) {
+Bytecode BytecodeArrayBuilder::BytecodeForLoadGlobal(LanguageMode language_mode,
+                                                     TypeofMode typeof_mode) {
   switch (language_mode) {
     case SLOPPY:
-      return Bytecode::kLdaGlobalSloppy;
+      return typeof_mode == INSIDE_TYPEOF
+                 ? Bytecode::kLdaGlobalInsideTypeofSloppy
+                 : Bytecode::kLdaGlobalSloppy;
     case STRICT:
-      return Bytecode::kLdaGlobalStrict;
+      return typeof_mode == INSIDE_TYPEOF
+                 ? Bytecode::kLdaGlobalInsideTypeofStrict
+                 : Bytecode::kLdaGlobalStrict;
     case STRONG:
       UNIMPLEMENTED();
     default:
       UNREACHABLE();
   }
   return static_cast<Bytecode>(-1);
 }
 
 
 // static
@@ skipping 119 matching lines @@
   DCHECK_GT(next_consecutive_count_, 0);
   builder_->BorrowConsecutiveTemporaryRegister(next_consecutive_register_);
   allocated_.push_back(next_consecutive_register_);
   next_consecutive_count_--;
   return Register(next_consecutive_register_++);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8