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

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index bb4618ae45d68fb35c8ebceb02de8f757b4b0373..241991cd4b5c5e38dc9eca1bf1e74b05402af8c6 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -1273,8 +1273,8 @@ 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(r0, Heap::kUndefinedValueRootIndex);
@@ -1282,16 +1282,8 @@ void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) {
   __ CompareRoot(r0, Heap::kNullValueRootIndex);
   __ b(eq, loop_statement.break_label());
 
-  // Convert the iterator to a JS object.
-  Label convert, done_convert;
-  __ JumpIfSmi(r0, &convert);
-  __ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE);
-  __ b(ge, &done_convert);
-  __ bind(&convert);
-  __ push(r0);
-  __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
-  __ bind(&done_convert);
-  __ push(r0);
+  // var iterator = iterable[Symbol.iterator]();
+  VisitForEffect(stmt->assign_iterator());
 
   // Loop entry.
   __ bind(loop_statement.continue_label());