v8/test/mjsunit/harmony/bigint/turbo.js

// Copyright 2017 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

'use strict'


function test(f, {input, check}) {
  let result;
  try {
    result = { value: f(input), exception: false }
  } catch(e) {
    result = { value: e, exception: true }
  }
  check(result);
}

function Test(f, ...cases) {
  for (let i = 0; i < cases.length; ++i) {
    %PrepareFunctionForOptimization(f);
    test(f, cases[i]);
    %OptimizeFunctionOnNextCall(f);
    for (let j = 0; j < cases.length; ++j) {
      test(f, cases[j]);
    }
    %DeoptimizeFunction(f);
  }
}


function V(input, expected_value) {
  function check(result) {
    assertFalse(result.exception, `unexpected exception ${result.value} on input ${input}`);
    assertEquals(expected_value, result.value);
  }
  return {input, check};
}

function E(input, expected_exception) {
  function check(result) {
    assertTrue(result.exception, `expected exception ${expected_exception.name} on input ${input}`);
    assertInstanceof(result.value, expected_exception);
  }
  return {input, check};
}


const six = {[Symbol.toPrimitive]() {return 6n}};


////////////////////////////////////////////////////////////////////////////////
// The first argument to {Test} is the function to test. The other arguments are
// the test cases, basically pairs of input and expected output. {Test} runs the
// function first unoptimized on one of the inputs, and then optimized on all
// inputs.
////////////////////////////////////////////////////////////////////////////////

Test(x => Number(x),
    V(1n, 1), V(1, 1), V("", 0), V(1.4, 1.4), V(null, 0), V(six, 6));

Test(x => Math.trunc(+x),
    E(1n, TypeError), V(1, 1), V("", 0), V(1.4, 1), V(null, 0), E(six, TypeError));

Test(x => Math.trunc(Number(x)),
    V(1n, 1), V(1, 1), V("", 0), V(1.4, 1), V(null, 0), V(six, 6));

Test(x => String(x),
    V(1n, "1"), V(1, "1"), V(1.4, "1.4"), V(null, "null"), V(six, "6"));

Test(x => BigInt(x),
    V(true, 1n), V(false, 0n), V(42n, 42n), E(NaN, RangeError), V(six, 6n));

Test(x => typeof x,
    V(1n, "bigint"), V(1, "number"), V(six, "object"));
Test(x => typeof x == "bigint",
    V(1n, true), V(1, false), V(six, false));

Test(x => !x,
    V(0n, true), V(42n, false), V(0x10000000000000000n, false), V(1, false),
    V(undefined, true), V(six, false));
Test(x => !!x,
    V(0n, false), V(42n, true), V(0x10000000000000000n, true), V(1, true),
    V(undefined, false), V(six, true));

Test(x => +x,
    E(-3n, TypeError), V(-4, -4), V(1.4, 1.4), V(null, 0), V("5", 5),
    E(six, TypeError));

Test(x => -x,
    V(-3n, 3n), V(-4, 4), V(1.4, -1.4), V(null, -0), V("5", -5), V(six, -6n));

Test(x => ~x,
    V(-3n, 2n), V(-4, 3), V(1.5, -2), V(null, -1), V("5", -6), V(six, -7n));

Test(x => ++x,
    V(-3n, -2n), V(-4, -3), V(1.5, 2.5), V(null, 1), V("5", 6), V(six, 7n));

Test(x => --x,
    V(-3n, -4n), V(-4, -5), V(1.5, 0.5), V(null, -1), V("5", 4), V(six, 5n));

Test(x => x++,
    V(-3n, -3n), V(-4, -4), V(1.5, 1.5), V(null, 0), V("5", 5), V(six, 6n));

Test(x => x--,
    V(-3n, -3n), V(-4, -4), V(1.5, 1.5), V(null, 0), V("5", 5), V(six, 6n));

Test(x => x + 42,
    E(1n, TypeError), V(2, 44), V(null, 42), V("a", "a42"), E(six, TypeError));
Test(x => x + 42n,
    V(1n, 43n), E(2, TypeError), E(null, TypeError), V("a", "a42"), V(six,48n));

Test(x => x - 4,
    E(1n, TypeError), V(3, -1), V(null, -4), V("a", NaN), E(six, TypeError));
Test(x => x - 4n,
    V(1n, -3n), E(3, TypeError), E(null, TypeError), E("a", TypeError),
    V(six, 2n));

Test(x => x * 42,
    E(2n, TypeError), V(3, 126), V("a", NaN), V(null, 0), E(six, TypeError));
Test(x => x * 42n,
    V(2n, 84n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 252n));

Test(x => x / 2,
    E(2n, TypeError), V(6, 3), V("a", NaN), V(null, 0), E(six, TypeError));
Test(x => x / 2n,
    V(2n, 1n), E(6, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 3n));

Test(x => x % 2,
    E(2n, TypeError), V(3, 1), V("a", NaN), V(null, 0), E(six, TypeError));
Test(x => x % 2n,
    V(2n, 0n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 0n));

Test(x => x | 5,
    E(2n, TypeError), V(3, 7), V("a", 5), V(null, 5), E(six, TypeError));
Test(x => x | 5n,
    V(2n, 7n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 7n));

Test(x => x & 5,
    E(2n, TypeError), V(3, 1), V("a", 0), V(null, 0), E(six, TypeError));
Test(x => x & 5n,
    V(2n, 0n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 4n));

Test(x => x ^ 5,
    E(2n, TypeError), V(3, 6), V("a", 5), V(null, 5), E(six, TypeError));
Test(x => x ^ 5n,
    V(2n, 7n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 3n));

Test(x => x << 3,
    E(2n, TypeError), V(3, 24), V("a", 0), V(null, 0), E(six, TypeError));
Test(x => x << 3n,
    V(2n, 16n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 48n));

Test(x => x >> 1,
    E(2n, TypeError), V(3, 1), V("a", 0), V(null, 0), E(six, TypeError));
Test(x => x >> 1n,
    V(2n, 1n), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    V(six, 3n));

Test(x => x >>> 1,
    E(2n, TypeError), V(3, 1), V("a", 0), V(null, 0), E(six, TypeError));
Test(x => x >>> 1n,
    E(2n, TypeError), E(3, TypeError), E("a", TypeError), E(null, TypeError),
    E(six, TypeError));

Test(x => x === 42,
    V(1n, false), V(2, false), V(null, false), V("a", false), V(six, false));
Test(x => x === 42,
    V(42n, false), V(42, true), V(null, false), V("42", false), V(six, false));
Test(x => x === 42n,
    V(1n, false), V(2, false), V(null, false), V("a", false), V(six, false));
Test(x => x === 42n,
    V(42n, true), V(42, false), V(null, false), V("42", false), V(six, false));

Test(x => x == 42,
    V(1n, false), V(2, false), V(null, false), V("a", false), V(six, false));
Test(x => x == 42,
    V(42n, true), V(42, true), V(null, false), V("42", true), V(six, false));
Test(x => x == 42n,
    V(1n, false), V(2, false), V(null, false), V("a", false), V(six, false));
Test(x => x == 42n,
    V(42n, true), V(42, true), V(null, false), V("42", true), V(six, false));

Test(x => x < 42,
    V(1n, true), V(2, true), V(null, true), V("41", true), V(six, true));
Test(x => x < 42,
    V(42n, false), V(42, false), V(null, true), V("42", false), V(six, true));
Test(x => x < 42n,
    V(1n, true), V(2, true), V(null, true), V("41", true), V(six, true));
Test(x => x < 42n,
    V(42n, false), V(42, false), V(null, true), V("42", false), V(six, true));