For-of calls [Symbol.iterator]() on RHS to get iterator

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 030e6f6265f87040bf9218549a803c636416a826..c9e280ddf7e089b73490a8be547f48e0af292aa0 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -1214,8 +1214,8 @@ void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) {
   Iteration loop_statement(this, stmt);
   increment_loop_depth();
 
-  // var iterator = iterable[@@iterator]()
-  VisitForAccumulatorValue(stmt->assign_iterator());
+  // var iterable = subject
+  VisitForAccumulatorValue(stmt->assign_iterable());
 
   // As with for-in, skip the loop if the iterator is null or undefined.
   __ CompareRoot(eax, Heap::kUndefinedValueRootIndex);
@@ -1223,15 +1223,8 @@ void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) {
   __ CompareRoot(eax, Heap::kNullValueRootIndex);
   __ j(equal, loop_statement.break_label());
 
-  // Convert the iterator to a JS object.
-  Label convert, done_convert;
-  __ JumpIfSmi(eax, &convert);
-  __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
-  __ j(above_equal, &done_convert);
-  __ bind(&convert);
-  __ push(eax);
-  __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
-  __ bind(&done_convert);
+  // var iterator = iterable[Symbol.iterator]();
+  VisitForEffect(stmt->assign_iterator());
 
   // Loop entry.
   __ bind(loop_statement.continue_label());