Migrate block 115.

tests/language/guess_cid_test.dart

-// 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.
-// Dart test program to test cid guessing optimizations.
-// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
-
-import "package:expect/expect.dart";
-
-main() {
-  // Warmup optimizes methods.
-  for (int i = 0; i < 100; i++) {
-    Expect.equals(i, compareInt(i));
-    Expect.equals(i.toDouble(), compareDouble(i.toDouble()));
-    Expect.equals(i, binOpInt(i, i));
-    Expect.equals(i.toDouble(), binOpDouble(i.toDouble(), i.toDouble()));
-  }
-  Expect.equals(3, compareInt(3));
-  Expect.equals(-2, compareInt(-2));
-  Expect.equals(0, compareInt(-1));
-
-  Expect.equals(3, binOpInt(3, 3));
-  Expect.equals(0, binOpInt(-2, -2));
-
-  Expect.equals(3.0, binOpDouble(3.0, 3.0));
-  Expect.equals(0.0, binOpDouble(-2.0, -2.0));
-
-  Expect.equals(3.0, compareDouble(3.0));
-  Expect.equals(-2.0, compareDouble(-2.0));
-  Expect.equals(0.0, compareDouble(-1.0));
-
-  testOSR();
-}
-
-int compareInt(int i) {
-  if (i < 0) {
-    // Not visited in before optimization.
-    // Guess cid of comparison below.
-    if (i == -1) return 0;
-  }
-  return i;
-}
-
-double compareDouble(double i) {
-  if (i < 0.0) {
-    // Not visited in before optimization.
-    // Guess cid of comparison below.
-    if (i == -1.0) return 0.0;
-  }
-  return i;
-}
-
-int binOpInt(int i, int x) {
-  if (i < 0) {
-    // Not visited in before optimization.
-    // Guess cid of binary operation below.
-    return x + 2;
-  }
-  return i;
-}
-
-double binOpDouble(double i, double x) {
-  if (i < 0.0) {
-    // Not visited in before optimization.
-    // Guess cid of binary operation below.
-    return x + 2.0;
-  }
-  return i;
-}
-
-testOSR() {
-  // Foul up  IC data in integer's unary minus.
-  var y = -0x80000000;
-  Expect.equals(1475739525896764129300, testLoop(10, 0x80000000000000000));
-  // Second time no deoptimization can occur, since runtime feedback has been collected.
-  Expect.equals(1475739525896764129300, testLoop(10, 0x80000000000000000));
-}
-
-testLoop(N, x) {
-  for (int i = 0; i < N; ++i) {
-    // Will trigger OSR. Operation in loop below will use guessed cids.
-  }
-  int sum = 0;
-  for (int i = 0; i < N; ++i) {
-    // Guess 'x' is Smi, but is actually Bigint: deoptimize.
-    sum += x + 2;
-  }
-  return sum;
-}