v8/test/mjsunit/compiler/turbo-number-feedback.js

// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flags: --allow-natives-syntax

(function AddSubtractSmis() {
  function f0(a, b, c) {
    return a + b - c;
  }

  %PrepareFunctionForOptimization(f0);
  assertEquals(4, f0(3, 2, 1));
  assertEquals(4, f0(3, 2, 1));
  %OptimizeFunctionOnNextCall(f0);
  assertEquals(4, f0(3, 2, 1));
})();

(function AddSubtractDoubles() {
  function f1(a, b, c) {
    return a + b - c;
  }

  %PrepareFunctionForOptimization(f1);
  assertEquals(4.5, f1(3.5, 2.5, 1.5));
  assertEquals(4.5, f1(3.5, 2.5, 1.5));
  %OptimizeFunctionOnNextCall(f1);
  assertEquals(4.5, f1(3.5, 2.5, 1.5));
  assertEquals(4, f1(3, 2, 1));
  assertTrue(isNaN(f1(3, 2, undefined)));
  assertTrue(isNaN(f1(3, undefined, 1)));
})();

(function CheckUint32ToInt32Conv() {
  function f2(a) {
    return (a >>> 0) + 1;
  }

  %PrepareFunctionForOptimization(f2);
  assertEquals(1, f2(0));
  assertEquals(1, f2(0));
  %OptimizeFunctionOnNextCall(f2);
  assertEquals(1, f2(0));
  assertEquals(4294967295, f2(-2));
})();

(function CheckFloat64ToInt32Conv() {
  function f3(a, b) {
    var x = 0;
    if (a) {
      x = 0.5;
    }
    return x + b;
  }

  %PrepareFunctionForOptimization(f3);
  assertEquals(1, f3(0, 1));
  assertEquals(1, f3(0, 1));
  %OptimizeFunctionOnNextCall(f3);
  assertEquals(1, f3(0, 1));
  assertEquals(1.5, f3(1, 1));
})();

(function ShiftLeftSmis() {
  function f4(a, b) {
    return a << b;
  }

  %PrepareFunctionForOptimization(f4);
  assertEquals(24, f4(3, 3));
  assertEquals(40, f4(5, 3));
  %OptimizeFunctionOnNextCall(f4);
  assertEquals(64, f4(4, 4));
})();

(function ShiftLeftNumbers() {
  function f5(a, b) {
    return a << b;
  }

  %PrepareFunctionForOptimization(f5);
  assertEquals(24, f5(3.3, 3.4));
  assertEquals(40, f5(5.1, 3.9));
  %OptimizeFunctionOnNextCall(f5);
  assertEquals(64, f5(4.9, 4.1));
})();

(function ShiftRightNumbers() {
  function f6(a, b) {
    return a >> b;
  }

  %PrepareFunctionForOptimization(f6);
  assertEquals(1, f6(8.3, 3.4));
  assertEquals(-2, f6(-16.1, 3.9));
  %OptimizeFunctionOnNextCall(f6);
  assertEquals(0, f6(16.2, 5.1));
})();

(function ShiftRightLogicalNumbers() {
  function f7(a, b) {
    return a >>> b;
  }

  %PrepareFunctionForOptimization(f7);
  assertEquals(1, f7(8.3, 3.4));
  assertEquals(536870910, f7(-16.1, 3.9));
  %OptimizeFunctionOnNextCall(f7);
  assertEquals(0, f7(16.2, 5.1));
})();