Move resolving of natives to a late stage (during code emission). That eliminates unnecessary nativ…

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, 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/intermediate_language.h"
 
 #include "vm/bit_vector.h"
+#include "vm/bootstrap.h"
 #include "vm/compiler.h"
 #include "vm/constant_propagator.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/flow_graph_optimizer.h"
 #include "vm/flow_graph_range_analysis.h"
 #include "vm/locations.h"
@@ skipping 3631 matching lines @@
 
 intptr_t MergedMathInstr::OutputIndexOf(Token::Kind token) {
   switch (token) {
     case Token::kTRUNCDIV: return 0;
     case Token::kMOD: return 1;
     default: UNIMPLEMENTED(); return -1;
   }
 }
 
 
+void NativeCallInstr::SetupNative() {
+  Zone* Z = Thread::Current()->zone();
+  const Class& cls = Class::Handle(Z, function().Owner());
+  const Library& library = Library::Handle(Z, cls.library());
+  const int num_params =
+      NativeArguments::ParameterCountForResolution(function());
+  bool auto_setup_scope = true;
+  NativeFunction native_function = NativeEntry::ResolveNative(
+      library, native_name(), num_params, &auto_setup_scope);
+  if (native_function == NULL) {
+    Report::MessageF(Report::kError,
+                     Script::Handle(function().script()),
+                     function().token_pos(),
+                     "native function '%s' (%" Pd " arguments) cannot be found",
+                     native_name().ToCString(),
+                     function().NumParameters());
+  }
+  set_native_c_function(native_function);
+  function().SetIsNativeAutoSetupScope(auto_setup_scope);
+  Dart_NativeEntryResolver resolver = library.native_entry_resolver();
+  bool is_bootstrap_native = Bootstrap::IsBootstapResolver(resolver);
+  set_is_bootstrap_native(is_bootstrap_native);
+}
+
 #undef __
 
 }  // namespace dart