Merge sin(a), cos(a) into one instruction. TODO: Implement for ARM and MIPS.

runtime/vm/code_generator.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/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/bigint_operations.h"
 #include "vm/code_patcher.h"
@@ skipping 1685 matching lines @@
     if (right < 0) {
       remainder -= right;
     } else {
       remainder += right;
     }
   }
   return remainder;
 }
 
 
+void SinCos(double arg, double* cos_res, double* sin_res) {
+  // The compiler may merge the calls to sincos, if supported. This
+  // typically occurs only when compiling for 64-bit targets.
+  *cos_res = cos(arg);
+  *sin_res = sin(arg);
+}
+
+
 // Update global type feedback recorded for a field recording the assignment
 // of the given value.
 //   Arg0: Field object;
 //   Arg1: Value that is being stored.
 DEFINE_RUNTIME_ENTRY(UpdateFieldCid, 2) {
   const Field& field = Field::CheckedHandle(arguments.ArgAt(0));
   const Object& value = Object::Handle(arguments.ArgAt(1));
   field.UpdateGuardedCidAndLength(value);
 }
 
 }  // namespace dart