Add --parse-all option in order to benchmark and measure the scanner/parser performance.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 11325 matching lines @@
         return error.raw();
       }
       func.ClearICDataArray();
       func.ClearCode();
     }
   }
   return error.raw();
 }
 
 
+RawError* Library::ParseAll() {
+  Thread* thread = Thread::Current();
+  Zone* zone = thread->zone();
+  Error& error = Error::Handle(zone);
+  const GrowableObjectArray& libs = GrowableObjectArray::Handle(
+      Isolate::Current()->object_store()->libraries());
+  Library& lib = Library::Handle(zone);
+  Class& cls = Class::Handle(zone);
+  for (int i = 0; i < libs.Length(); i++) {
+    lib ^= libs.At(i);
+    ClassDictionaryIterator it(lib, ClassDictionaryIterator::kIteratePrivate);
+    while (it.HasNext()) {
+      cls = it.GetNextClass();
+      error = cls.EnsureIsFinalized(thread);
+      if (!error.IsNull()) {
+        return error.raw();
+      }
+      error = Compiler::ParseAllFunctions(cls);
+      if (!error.IsNull()) {
+        return error.raw();
+      }
+    }
+  }
+
+  // Inner functions get added to the closures array. As part of compilation

[hausner, 2016/09/09 16:31:07]

I don't think iterating over inner functions is needed. We parse inner functions
while parsing their enclosing function. Thus, this step is just parsing them
*again*.

[siva, 2016/09/23 00:04:04]

But I guess it is representative of what we would do if we had to produce an IR.

[hausner, 2016/09/23 21:57:20]

Sure. On the other hand, in an AOT compiler we would not reparse, but keep the
IR and produce code right away. 

+  // more closures can be added to the end of the array. Compile all the
+  // closures until we have reached the end of the "worklist".
+  const GrowableObjectArray& closures = GrowableObjectArray::Handle(zone,
+      Isolate::Current()->object_store()->closure_functions());
+  Function& func = Function::Handle(zone);
+  for (int i = 0; i < closures.Length(); i++) {
+    func ^= closures.At(i);
+    if (!func.HasCode()) {
+      error = Compiler::ParseFunction(thread, func);
+      if (!error.IsNull()) {
+        return error.raw();
+      }
+      func.ClearICDataArray();
+      func.ClearCode();
+    }
+  }
+  return error.raw();
+}
+
+
 // Return Function::null() if function does not exist in libs.
 RawFunction* Library::GetFunction(const GrowableArray<Library*>& libs,
                                   const char* class_name,
                                   const char* function_name) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Function& func = Function::Handle(zone);
   String& class_str = String::Handle(zone);
   String& func_str = String::Handle(zone);
   Class& cls = Class::Handle(zone);
@@ skipping 11409 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart