Reapply "Deoptimization support in inlined code."

runtime/vm/intrinsifier.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.
 // Class for intrinsifying functions.
 
 #include "vm/intrinsifier.h"
 #include "vm/flags.h"
 #include "vm/object.h"
 
 namespace dart {
@@ skipping 32 matching lines @@
 static bool TestFunction(const Function& function,
                          const char* function_class_name,
                          const char* function_name,
                          const char* test_class_name,
                          const char* test_function_name) {
   return CompareNames(test_class_name, function_class_name) &&
          CompareNames(test_function_name, function_name);
 }
 
 
-bool Intrinsifier::Intrinsify(const Function& function, Assembler* assembler) {
+bool Intrinsifier::CanIntrinsify(const Function& function) {
   if (!FLAG_intrinsify) return false;
   // Closure functions may have different arguments.
   if (function.IsClosureFunction()) return false;
   const char* function_name = String::Handle(function.name()).ToCString();
   const Class& function_class = Class::Handle(function.Owner());
   const char* class_name = String::Handle(function_class.Name()).ToCString();
   // Only core and math library methods can be intrinsified.
   const Library& core_lib = Library::Handle(Library::CoreLibrary());
   const Library& core_impl_lib = Library::Handle(Library::CoreImplLibrary());
   const Library& math_lib = Library::Handle(Library::MathLibrary());
   if ((function_class.library() != core_lib.raw()) &&
       (function_class.library() != core_impl_lib.raw()) &&
       (function_class.library() != math_lib.raw())) {
     return false;
   }
 #define FIND_INTRINSICS(test_class_name, test_function_name, destination)      \
   if (TestFunction(function,                                                   \
                    class_name, function_name,                                  \
                    #test_class_name, #test_function_name)) {                   \
+    return true;                                                               \
+  }                                                                            \
+
+INTRINSIC_LIST(FIND_INTRINSICS);
+#undef FIND_INTRINSICS
+  return false;
+}
+
+bool Intrinsifier::Intrinsify(const Function& function, Assembler* assembler) {
+  if (!CanIntrinsify(function)) return false;
+  const char* function_name = String::Handle(function.name()).ToCString();
+  const Class& function_class = Class::Handle(function.Owner());
+  const char* class_name = String::Handle(function_class.Name()).ToCString();
+#define FIND_INTRINSICS(test_class_name, test_function_name, destination)      \
+  if (TestFunction(function,                                                   \
+                   class_name, function_name,                                  \
+                   #test_class_name, #test_function_name)) {                   \
     return destination(assembler);                                             \
   }                                                                            \
 
 INTRINSIC_LIST(FIND_INTRINSICS);
 #undef FIND_INTRINSICS
   return false;
 }
 
 }  // namespace dart