Add some comments to the ia32 code generator

src/arm/codegen-arm.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3318 matching lines @@
     ASSERT_NOT_NULL(lit);
     name = Handle<String>::cast(lit->handle());
     // Do not materialize the receiver on the frame if it is trivial.
     is_trivial_receiver = prop->obj()->IsTrivial();
     if (!is_trivial_receiver) Load(prop->obj());
   }
 
   // Change to slow case in the beginning of an initialization block to
   // avoid the quadratic behavior of repeatedly adding fast properties.
   if (node->starts_initialization_block()) {
-    // Initialization block consists of assignments on the form expr.x = ..., so
+    // Initialization block consists of assignments of the form expr.x = ..., so
     // this will never be an assignment to a variable, so there must be a
     // receiver object.
     ASSERT_EQ(NULL, var);
     if (is_trivial_receiver) {
       Load(prop->obj());
     } else {
       frame_->Dup();
     }
     frame_->CallRuntime(Runtime::kToSlowProperties, 1);
   }
@@ skipping 6534 matching lines @@
 
   // Just jump to runtime to add the two strings.
   __ bind(&string_add_runtime);
   __ TailCallRuntime(Runtime::kStringAdd, 2, 1);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal