valueToInt32.js - mozsearch

Enable keyboard shortcuts

// vim: set ts=8 sts=4 et sw=4 tw=99:

function f(x, y) {

    // Confuse the type analysis to not know the type of x.

    var u;

    var a = x + u;

    var b = x + 3;

    return x + y;

function g_bool(x, y) {

    var t;

    if (x + 0)

        t = true;

    else

        t = false;

    return t + y;

function g_null(x) {

    return null + x;

assertEq(g_bool(1, 2), 3);

assertEq(g_bool(0, 2), 2);

assertEq(g_null(2), 2);

// These will not bailout.

assertEq(f(Math.cos(Math.PI), 2), 1);

assertEq(f(null, 2), 2);

assertEq(f(false, 2), 2);

assertEq(f(true, 2), 3);

assertEq(f(17, 2), 19);

// These will bailout.

assertEq(f(undefined, 2), Number.NaN);

assertEq(f("20", 2), "202");

assertEq(f(16.3, 2), 18.3);

assertEq((1 / f(-0, -0)), -Infinity);