DBC: Misc double instructions

runtime/tests/vm/dart/double_to_smi_test.dart

 // Copyright (c) 2016, 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.
 
 // VMOptions=--optimization_counter_threshold=10 --no-use-osr --no-background-compilation
 
 import "package:expect/expect.dart";
 
-double f(double x, double five, dynamic y) {
-  double z = x + five;
-  var a = y + 5;
-  return z + a.toDouble();
+int convert(dynamic d) {
+  return d.toInt();
 }
 
-void main() {
-  double x = 1.0;
-  for (int i = 0; i < 1000; i++) {
-    x = f(x, 5.0, i);
+main() {
+  double x = -100.0;
+  int count = 0;
+  while (x < 100.0) {
+    count = count + convert(x);
+    x = x + 0.5;
   }
-  x = f(x, 5.0, 1.0);
-  Expect.equals(509512.0, x);
+  Expect.equals(-100, count);
+  count = convert(42);
+  Expect.equals(42, count);
 }
-