[Interpreter] Adds an optimization to remove redundant Ldar/Star.

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 "src/compiler.h"
 #include "src/interpreter/control-flow-builders.h"
 #include "src/objects.h"
 #include "src/parser.h"
@@ skipping 640 matching lines @@
   loop_builder.SetContinueTarget(condition_label);
 }
 
 
 void BytecodeGenerator::VisitWhileStatement(WhileStatement* stmt) {
   LoopBuilder loop_builder(builder());
   ControlScopeForIteration execution_control(this, stmt, &loop_builder);
 
   BytecodeLabel body_label, condition_label, done_label;
   if (stmt->cond()->ToBooleanIsFalse()) {
-    // If the condition is false there is no need to generating the loop.
+    // If the condition is false there is no need to generate the loop.
     return;
   }
 
   if (!stmt->cond()->ToBooleanIsTrue()) {
     builder()->Jump(&condition_label);
   }
   builder()->Bind(&body_label);
   Visit(stmt->body());
 
   builder()->Bind(&condition_label);
@@ skipping 1488 matching lines @@
 }
 
 
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8