[crankshaft] Add baseline implementation of for-of.

src/typing.cc

 // Copyright 2013 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/typing.h"
 
 #include "src/frames.h"
 #include "src/frames-inl.h"
 #include "src/ostreams.h"
 #include "src/parser.h"  // for CompileTimeValue; TODO(rossberg): should move
@@ skipping 281 matching lines @@
   RECURSE(Visit(stmt->enumerable()));
   store_.Forget();  // Control may transfer here via looping or 'continue'.
   ObserveTypesAtOsrEntry(stmt);
   RECURSE(Visit(stmt->body()));
   store_.Forget();  // Control may transfer here via 'break'.
 }
 
 
 void AstTyper::VisitForOfStatement(ForOfStatement* stmt) {
   RECURSE(Visit(stmt->iterable()));
+  RECURSE(Visit(stmt->assign_iterator()));
   store_.Forget();  // Control may transfer here via looping or 'continue'.
+  RECURSE(Visit(stmt->next_result()));
+  // Collect type feedback.
+  stmt->result_done()->RecordToBooleanTypeFeedback(oracle());
+  ObserveTypesAtOsrEntry(stmt);
+  RECURSE(Visit(stmt->result_done()));
+  RECURSE(Visit(stmt->assign_each()));
   RECURSE(Visit(stmt->body()));
   store_.Forget();  // Control may transfer here via 'break'.
 }
 
 
 void AstTyper::VisitTryCatchStatement(TryCatchStatement* stmt) {
   Effects try_effects = EnterEffects();
   RECURSE(Visit(stmt->try_block()));
   ExitEffects();
   Effects catch_effects = EnterEffects();
@@ skipping 476 matching lines @@
 void AstTyper::VisitImportDeclaration(ImportDeclaration* declaration) {
 }
 
 
 void AstTyper::VisitExportDeclaration(ExportDeclaration* declaration) {
 }
 
 
 }  // namespace internal
 }  // namespace v8