blob: 20eb479b3bc6d94ad3a766289459f88ca31d3d35 [file] [log] [blame]
//@ skip if not $jitTests
//@ requireOptions("--forceUnlinkedDFG=0")
//@ defaultNoEagerRun
"use strict";
let validInputTestCases = [
// input as string, expected result as string.
["undefined", "NaN"],
["null", "0"],
["0", "0"],
["-0.", "-0"],
["0.5", "0"],
["-0.5", "-0"],
["4", "4"],
["42.1", "42"],
["42.5", "42"],
["42.9", "42"],
["-42.1", "-42"],
["-42.5", "-42"],
["-42.9", "-42"],
["Math.PI", "3"],
["Infinity", "Infinity"],
["-Infinity", "-Infinity"],
["NaN", "NaN"],
["\"WebKit\"", "NaN"],
["\"4\"", "4"],
["\"42.5\"", "42"],
["{ valueOf: () => { return 4; } }", "4"],
["{ valueOf: () => { return 0; } }", "0"],
["{ valueOf: () => { return -0; } }", "-0"],
["{ valueOf: () => { return 0.5; } }", "0"],
["{ valueOf: () => { return -0.5; } }", "-0"],
["{ valueOf: () => { return Number.MIN_SAFE_INTEGER; } }", "-9007199254740991"],
["{ valueOf: () => { return Number.MAX_SAFE_INTEGER; } }", "9007199254740991"],
["{ valueOf: () => { return 0x80000000|0; } }", "-2147483648"],
["{ valueOf: () => { return 0x7fffffff|0; } }", "2147483647"],
["{ valueOf: () => { return (0x80000000|0) - 0.5; } }", "-2147483648"],
["{ valueOf: () => { return (0x7fffffff|0) + 0.5; } }", "2147483647"],
];
let validInputTypedTestCases = validInputTestCases.map((element) => { return [eval("(" + element[0] + ")"), eval(element[1])] });
function isIdentical(result, expected)
{
if (expected === expected) {
if (result !== expected)
return false;
if (!expected && (1 / expected) !== (1 / result))
return false;
return true;
}
return result !== result;
}
// Test Math.trunc() without arguments.
function opaqueTruncNoArgument() {
return Math.trunc();
}
noInline(opaqueTruncNoArgument);
noOSRExitFuzzing(opaqueTruncNoArgument);
function testNoArgument() {
for (let i = 0; i < 1e4; ++i) {
let output = opaqueTruncNoArgument();
if (!isIdentical(output, NaN)) {
throw "Failed opaqueTruncNoArgument";
}
}
if (numberOfDFGCompiles(opaqueTruncNoArgument) > 1)
throw "The call without arguments should never exit.";
}
testNoArgument();
// Test Math.trunc() with a very polymorphic input. All test cases are seen at each iteration.
function opaqueAllTypesTrunc(argument) {
return Math.trunc(argument);
}
noInline(opaqueAllTypesTrunc);
noOSRExitFuzzing(opaqueAllTypesTrunc);
function testAllTypesCall() {
for (let i = 0; i < 1e3; ++i) {
for (let testCaseInput of validInputTypedTestCases) {
let output = opaqueAllTypesTrunc(testCaseInput[0]);
if (!isIdentical(output, testCaseInput[1]))
throw "Failed testAllTypesCall for input " + testCaseInput[0] + " expected " + testCaseInput[1] + " got " + output;
}
}
if (numberOfDFGCompiles(opaqueAllTypesTrunc) > 3)
throw "We should have detected trunc() was polymorphic and generated a generic version.";
}
testAllTypesCall();
// Polymorphic input but negative zero is not observable.
function opaqueAllTypesTruncWithoutNegativeZero(argument) {
return Math.trunc(argument) + 0;
}
noInline(opaqueAllTypesTruncWithoutNegativeZero);
noOSRExitFuzzing(opaqueAllTypesTruncWithoutNegativeZero);
function testAllTypesWithoutNegativeZeroCall() {
for (let i = 0; i < 1e3; ++i) {
for (let testCaseInput of validInputTypedTestCases) {
let output = opaqueAllTypesTruncWithoutNegativeZero(testCaseInput[0]);
if (!isIdentical(output, testCaseInput[1] + 0))
throw "Failed testAllTypesWithoutNegativeZeroCall for input " + testCaseInput[0] + " expected " + testCaseInput[1] + " got " + output;
}
}
if (numberOfDFGCompiles(opaqueAllTypesTrunc) > 3)
throw "We should have detected trunc() was polymorphic and generated a generic version.";
}
testAllTypesWithoutNegativeZeroCall();
// Test Math.trunc() on a completely typed input. Every call see only one type.
function testSingleTypeCall() {
for (let testCaseInput of validInputTestCases) {
eval(`
function opaqueTrunc(argument) {
return Math.trunc(argument);
}
noInline(opaqueTrunc);
noOSRExitFuzzing(opaqueTrunc);
for (let i = 0; i < 1e4; ++i) {
if (!isIdentical(opaqueTrunc(${testCaseInput[0]}), ${testCaseInput[1]})) {
throw "Failed testSingleTypeCall()";
}
}
if (numberOfDFGCompiles(opaqueTrunc) > 1)
throw "Failed testSingleTypeCall(). We should have compiled a single trunc for the expected type.";
`);
}
}
testSingleTypeCall();
function checkCompileCountForUselessNegativeZero(testFunction)
{
return numberOfDFGCompiles(testFunction) <= 1;
}
// Test Math.trunc() on a completely typed input, but without negative zero.
function testSingleTypeWithoutNegativeZeroCall() {
for (let testCaseInput of validInputTestCases) {
eval(`
function opaqueTrunc(argument) {
return Math.trunc(argument) + 0;
}
noInline(opaqueTrunc);
noOSRExitFuzzing(opaqueTrunc);
for (let i = 0; i < 1e4; ++i) {
if (!isIdentical(opaqueTrunc(${testCaseInput[0]}), ${testCaseInput[1]} + 0)) {
throw "Failed testSingleTypeWithoutNegativeZeroCall()";
}
}
if (!checkCompileCountForUselessNegativeZero(opaqueTrunc))
throw "Failed testSingleTypeWithoutNegativeZeroCall(). We should have compiled a single trunc for the expected type.";
`);
}
}
testSingleTypeWithoutNegativeZeroCall();
// Test Math.trunc() on constants
function testConstant() {
for (let testCaseInput of validInputTestCases) {
eval(`
function opaqueTruncOnConstant() {
return Math.trunc(${testCaseInput[0]});
}
noInline(opaqueTruncOnConstant);
noOSRExitFuzzing(opaqueTruncOnConstant);
for (let i = 0; i < 1e4; ++i) {
if (!isIdentical(opaqueTruncOnConstant(), ${testCaseInput[1]})) {
throw "Failed testConstant()";
}
}
if (numberOfDFGCompiles(opaqueTruncOnConstant) > 1)
throw "Failed testConstant(). We should have compiled a single trunc for the expected type.";
`);
}
}
testConstant();
// Verify we call valueOf() exactly once per call.
function opaqueTruncForSideEffects(argument) {
return Math.trunc(argument);
}
noInline(opaqueTruncForSideEffects);
noOSRExitFuzzing(opaqueTruncForSideEffects);
function testSideEffect() {
let testObject = {
counter: 0,
valueOf: function() { ++this.counter; return 16; }
};
let trunc16 = Math.trunc(16);
for (let i = 0; i < 1e4; ++i) {
if (opaqueTruncForSideEffects(testObject) !== trunc16)
throw "Incorrect result in testSideEffect()";
}
if (testObject.counter !== 1e4)
throw "Failed testSideEffect()";
if (numberOfDFGCompiles(opaqueTruncForSideEffects) > 1)
throw "opaqueTruncForSideEffects() is predictable, it should only be compiled once.";
}
testSideEffect();
// Verify trunc() is not subject to CSE if the argument has side effects.
function opaqueTruncForCSE(argument) {
return Math.trunc(argument) + Math.trunc(argument) + Math.trunc(argument);
}
noInline(opaqueTruncForCSE);
noOSRExitFuzzing(opaqueTruncForCSE);
function testCSE() {
let testObject = {
counter: 0,
valueOf: function() { ++this.counter; return 16; }
};
let trunc16 = Math.trunc(16);
let threeTrunc16 = trunc16 + trunc16 + trunc16;
for (let i = 0; i < 1e4; ++i) {
if (opaqueTruncForCSE(testObject) !== threeTrunc16)
throw "Incorrect result in testCSE()";
}
if (testObject.counter !== 3e4)
throw "Failed testCSE()";
if (numberOfDFGCompiles(opaqueTruncForCSE) > 1)
throw "opaqueTruncForCSE() is predictable, it should only be compiled once.";
}
testCSE();
// Verify trunc() is not subject to DCE if the argument has side effects.
function opaqueTruncForDCE(argument) {
Math.trunc(argument);
}
noInline(opaqueTruncForDCE);
noOSRExitFuzzing(opaqueTruncForDCE);
function testDCE() {
let testObject = {
counter: 0,
valueOf: function() { ++this.counter; return 16; }
};
for (let i = 0; i < 1e4; ++i) {
opaqueTruncForDCE(testObject);
}
if (testObject.counter !== 1e4)
throw "Failed testDCE()";
if (numberOfDFGCompiles(opaqueTruncForDCE) > 1)
throw "opaqueTruncForDCE() is predictable, it should only be compiled once.";
}
testDCE();
// Test exceptions in the argument.
function testException() {
let counter = 0;
function opaqueTruncWithException(argument) {
let result = Math.trunc(argument);
++counter;
return result;
}
noInline(opaqueTruncWithException);
let testObject = { valueOf: () => { return 64; } };
let trunc64 = Math.trunc(64);
// Warm up without exception.
for (let i = 0; i < 1e3; ++i) {
if (opaqueTruncWithException(testObject) !== trunc64)
throw "Incorrect result in opaqueTruncWithException()";
}
let testThrowObject = { valueOf: () => { throw testObject; return 64; } };
for (let i = 0; i < 1e2; ++i) {
try {
if (opaqueTruncWithException(testThrowObject) !== 8)
throw "This code should not be reached!!";
} catch (e) {
if (e !== testObject) {
throw "Wrong object thrown from opaqueTruncWithException."
}
}
}
if (counter !== 1e3) {
throw "Invalid count in testException()";
}
}
testException();