test rename overhaul: step 12 - standalone

tests/standalone/src/DeoptimizationTest.dart

-// Copyright (c) 2011, 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.
-// Test deoptimization.
-
-class SmiCompares {
-  // Test deoptimization when one argument is known to be Smi.
-  static bool smiCompareLessThan2(a) {
-    return a < 2;
-  }
-
-  // Test deoptimization when one argument is known to be Smi.
-  static bool smiCompareGreaterThan2(a) {
-    return 2 < a;
-  }
-
-  // Test deoptimization when both arguments unknown.
-  static bool smiCompareLessThan(a, b) {
-    return a < b;
-  }
-
-  // Test deoptimization when both arguments unknown.
-  static bool smiCompareGreaterThan(a, b) {
-    return a > b;
-  }
-
-  static smiComparesTest() {
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(true, smiCompareLessThan2(1));
-      Expect.equals(false, smiCompareLessThan2(3));
-      Expect.equals(false, smiCompareGreaterThan2(1));
-      Expect.equals(true, smiCompareGreaterThan2(3));
-      Expect.equals(true, smiCompareLessThan(1, 2));
-      Expect.equals(false, smiCompareGreaterThan(1, 2));
-    }
-    // Deoptimize by passing a double instead of Smi
-    Expect.equals(true, smiCompareLessThan2(1.0));
-    Expect.equals(false, smiCompareGreaterThan2(1.0));
-    Expect.equals(true, smiCompareLessThan(1.0, 2));
-    Expect.equals(false, smiCompareGreaterThan(1, 2.0));
-  }
-}
-
-
-class SmiBinop {
-  static subWithLiteral(a) {
-    return a - 1;
-  }
-
-  static void smiBinopTest() {
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(2, subWithLiteral(3));
-    }
-    // Deoptimize.
-    Expect.equals(2.0, subWithLiteral(3.0));
-  }
-
-  static mul(x) {
-    return x * 1024;
-  }
-
-  static void smiBinopOverflowTest() {
-    final int big = 536870912;
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(1024, mul(1));
-    }
-    // Deoptimize by overflow.
-    Expect.equals(1024 * big, mul(big));
-  }
-}
-
-
-class ObjectsEquality {
-  static bool compareEqual(a, b) {
-    return a == b;
-  }
-  
-  static bool compareNotEqual(a, b) {
-    return a != b;
-  }
-
-  // Use only Object.==.
-  static void objectsEqualityTest() {
-    var a = new ObjectsEquality();
-    var b = new ObjectsEquality();
-    final nan = 0.0/0.0;
-    for (int i = 0; i < 1000; i++) {
-      Expect.equals(true, compareEqual(a, a));
-      Expect.equals(true, compareEqual(null, null));
-      Expect.equals(false, compareEqual(null, a));
-      Expect.equals(false, compareEqual(a, null));
-      Expect.equals(true, compareEqual(b, b));
-      Expect.equals(false, compareEqual(a, b));
-
-      Expect.equals(false, compareNotEqual(a, a));
-      Expect.equals(false, compareNotEqual(null, null));
-      Expect.equals(true, compareNotEqual(null, a));
-      Expect.equals(true, compareNotEqual(a, null));
-      Expect.equals(false, compareNotEqual(b, b));
-      Expect.equals(true, compareNotEqual(a, b));
-    }
-    var c = new SmiBinop();
-    // Deoptimize.
-    Expect.equals(true, compareEqual(c, c));
-    Expect.equals(false, compareEqual(c, null));
-    Expect.equals(false, compareNotEqual(c, c));
-    Expect.equals(true, compareNotEqual(c, null));
-  }
-}
-
-class DeoptimizationTest {
-  static foo(a, b) {
-    return a - b;
-  }
-
-  static test1() {
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(2, foo(3, 1));  // <-- Optimizes 'foo',
-    }
-    Expect.equals(2.2, foo(1.2, -1.0));  // <-- Deoptimizes 'foo'.
-    for (int i = 0; i < 10000; i++) {
-       Expect.equals(2, foo(3, 1));  // <-- Optimizes 'foo'.
-    }
-    Expect.equals(2.2, foo(1.2, -1));  // <-- Deoptimizes 'foo'.
-  }
-
-  static moo(n) {
-    return ++n;
-  }
-
-  static test2() {
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(4, moo(3));  // <-- Optimizes 'moo',
-    }
-    Expect.equals(2.2, moo(1.2));  // <-- Deoptimizes 'moo'.
-    for (int i = 0; i < 10000; i++) {
-       Expect.equals(4, moo(3));  // <-- Optimizes 'moo'.
-    }
-    Expect.equals(2.2, moo(1.2));  // <-- Deoptimizes 'moo'.
-  }
-
-  static test3() {
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(2.0, foo(3.0, 1.0));  // <-- Optimizes 'foo',
-    }
-    Expect.equals(2, foo(1, -1));  // <-- Deoptimizes 'foo'.
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(2.0, foo(3.0, 1.0));  // <-- Optimizes 'foo',
-    }
-    Expect.equals(2.2, moo(1.2));  // <-- Deoptimizes 'moo'.
-  }
-
-  static bool compareInt(a, b) {
-    return a < b;
-  }
-
-  static bool compareDouble(a, b) {
-    return a < b;
-  }
-
-  static test4() {
-    for (int i = 0; i < 2000; i++) {
-      Expect.equals(true, compareInt(1, 2));
-      Expect.equals(true, compareDouble(1.0, 2.0));
-    }
-    // Trigger deoptimization in compareInt and compareDouble.
-    Expect.equals(true, compareInt(1, 2.0));
-    Expect.equals(true, compareDouble(1.0, 2));
-  }
-
-  static smiRightShift() {
-    int ShiftRight(int a, int b) { return a >> b; }
-    
-    for (int i = 0; i < 2000; i++) {
-      var r = ShiftRight(10, 2);
-      Expect.equals(2, r);
-    }
-    // ShiftRight is optimized.
-    Expect.equals(0, ShiftRight(10, 64));
-    // Deoptimize ShiftRight because 'a' is a Mint.
-    var mint = 1 << 63;
-    Expect.equals(1 << 3, ShiftRight(mint, 60));
-  }
-
-  static doubleUnary() {
-    num unary(num a) { return -a; }
-
-    for (int i = 0; i < 2000; i++) {
-      var r = unary(2.0);
-      Expect.equals(-2.0, r);
-    }
-    var r = unary(5);
-    Expect.equals(-5, r);
-  }
-
-  static void testMain() {
-    test1();
-    test2();
-    test3();
-    test4();
-    SmiCompares.smiComparesTest();
-    SmiBinop.smiBinopTest();
-    SmiBinop.smiBinopOverflowTest();
-    ObjectsEquality.objectsEqualityTest();
-    smiRightShift();
-    doubleUnary();
-  }
-}
-
-main() {
-  DeoptimizationTest.testMain();
-}