[Interpreter]: Add support for strict mode load / store ICs.

src/interpreter/bytecode-generator.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-generator.h"
 
 #include <stack>
 
 #include "src/compiler.h"
 #include "src/interpreter/control-flow-builders.h"
@@ skipping 669 matching lines @@
   Token::Value op = expr->op();
   Expression* left = expr->left();
   Expression* right = expr->right();
 
   TemporaryRegisterScope temporary_register_scope(&builder_);
   Register temporary = temporary_register_scope.NewRegister();
 
   Visit(left);
   builder()->StoreAccumulatorInRegister(temporary);
   Visit(right);
-  builder()->CompareOperation(op, temporary, language_mode());
+  builder()->CompareOperation(op, temporary, language_mode_strength());
 }
 
 
 void BytecodeGenerator::VisitSpread(Spread* expr) { UNREACHABLE(); }
 
 
 void BytecodeGenerator::VisitEmptyParentheses(EmptyParentheses* expr) {
   UNREACHABLE();
 }
 
@@ skipping 18 matching lines @@
   Token::Value op = binop->op();
   Expression* left = binop->left();
   Expression* right = binop->right();
 
   TemporaryRegisterScope temporary_register_scope(&builder_);
   Register temporary = temporary_register_scope.NewRegister();
 
   Visit(left);
   builder()->StoreAccumulatorInRegister(temporary);
   Visit(right);
-  builder()->BinaryOperation(op, temporary);
+  builder()->BinaryOperation(op, temporary, language_mode_strength());
 }
 
 
 LanguageMode BytecodeGenerator::language_mode() const {
   return info()->language_mode();
 }
 
 
+Strength BytecodeGenerator::language_mode_strength() const {
+  return strength(language_mode());
+}
+
+
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8