blob: c36293bfa6e4f3c5b049278f2483e1630425934f [file] [log] [blame]
//@ skip if not $jitTests
//@ requireOptions("--forceUnlinkedDFG=0")
//@ defaultNoEagerRun
"use strict";
let log2OfHalf = Math.log2(0.5);
let validInputTestCases = [
// input as string, expected result as string.
["undefined", "NaN"],
["null", "-Infinity"],
["1", "0"],
["0", "-Infinity"],
["-0.", "-Infinity"],
["0.5", "" + log2OfHalf],
["Math.PI", "" + Math.log2(Math.PI)],
["Infinity", "Infinity"],
["-Infinity", "NaN"],
["NaN", "NaN"],
["\"WebKit\"", "NaN"],
["\"0.5\"", "" + log2OfHalf],
["{ valueOf: () => { return 0.5; } }", "" + log2OfHalf],
];
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)
return (1 / expected) === (1 / result);
return true;
}
return result !== result;
}
// Test Math.log2() without arguments.
function opaqueLog2NoArgument() {
return Math.log2();
}
noInline(opaqueLog2NoArgument);
noOSRExitFuzzing(opaqueLog2NoArgument);
function testNoArgument() {
for (let i = 0; i < 1e4; ++i) {
let output = opaqueLog2NoArgument();
if (output === output) {
throw "Failed opaqueLog2NoArgument";
}
}
if (numberOfDFGCompiles(opaqueLog2NoArgument) > 1)
throw "The call without arguments should never exit.";
}
testNoArgument();
// Test Math.log2() with a very polymorphic input. All test cases are seen at each iteration.
function opaqueAllTypesLog2(argument) {
return Math.log2(argument);
}
noInline(opaqueAllTypesLog2);
noOSRExitFuzzing(opaqueAllTypesLog2);
function testAllTypesCall() {
for (let i = 0; i < 1e3; ++i) {
for (let testCaseInput of validInputTypedTestCases) {
let output = opaqueAllTypesLog2(testCaseInput[0]);
if (!isIdentical(output, testCaseInput[1]))
throw "Failed testAllTypesCall for input " + testCaseInput[0] + " expected " + testCaseInput[1] + " got " + output;
}
}
if (numberOfDFGCompiles(opaqueAllTypesLog2) > 2)
throw "We should have detected log2() was polymorphic and generated a generic version.";
}
testAllTypesCall();
// Test Math.log2() on a completely typed input. Every call see only one type.
function testSingleTypeCall() {
for (let testCaseInput of validInputTestCases) {
eval(`
function opaqueLog2(argument) {
return Math.log2(argument);
}
noInline(opaqueLog2);
noOSRExitFuzzing(opaqueLog2);
for (let i = 0; i < 1e4; ++i) {
if (!isIdentical(opaqueLog2(${testCaseInput[0]}), ${testCaseInput[1]})) {
throw "Failed testSingleTypeCall()";
}
}
if (numberOfDFGCompiles(opaqueLog2) > 1)
throw "We should have compiled a single log2 for the expected type.";
`);
}
}
testSingleTypeCall();
// Test Math.log2() on constants
function testConstant() {
for (let testCaseInput of validInputTestCases) {
eval(`
function opaqueLog2OnConstant() {
return Math.log2(${testCaseInput[0]});
}
noInline(opaqueLog2OnConstant);
noOSRExitFuzzing(opaqueLog2OnConstant);
for (let i = 0; i < 1e4; ++i) {
if (!isIdentical(opaqueLog2OnConstant(), ${testCaseInput[1]})) {
throw "Failed testConstant()";
}
}
if (numberOfDFGCompiles(opaqueLog2OnConstant) > 1)
throw "We should have compiled a single log2 for the expected type.";
`);
}
}
testConstant();
// Verify we call valueOf() exactly once per call.
function opaqueLog2ForSideEffects(argument) {
return Math.log2(argument);
}
noInline(opaqueLog2ForSideEffects);
noOSRExitFuzzing(opaqueLog2ForSideEffects);
function testSideEffect() {
let testObject = {
counter: 0,
valueOf: function() { ++this.counter; return 0.2; }
};
let log2Result = Math.log2(0.2);
for (let i = 0; i < 1e4; ++i) {
if (opaqueLog2ForSideEffects(testObject) !== log2Result)
throw "Incorrect result in testSideEffect()";
}
if (testObject.counter !== 1e4)
throw "Failed testSideEffect()";
if (numberOfDFGCompiles(opaqueLog2ForSideEffects) > 1)
throw "opaqueLog2ForSideEffects() is predictable, it should only be compiled once.";
}
testSideEffect();
// Verify log2() is not subject to CSE if the argument has side effects.
function opaqueLog2ForCSE(argument) {
return Math.log2(argument) + Math.log2(argument) + Math.log2(argument);
}
noInline(opaqueLog2ForCSE);
noOSRExitFuzzing(opaqueLog2ForCSE);
function testCSE() {
let testObject = {
counter: 0,
valueOf: function() { ++this.counter; return 0.2; }
};
let log2Result = Math.log2(0.2);
let threelog2Result = log2Result + log2Result + log2Result;
for (let i = 0; i < 1e4; ++i) {
if (opaqueLog2ForCSE(testObject) !== threelog2Result)
throw "Incorrect result in testCSE()";
}
if (testObject.counter !== 3e4)
throw "Failed testCSE()";
if (numberOfDFGCompiles(opaqueLog2ForCSE) > 1)
throw "opaqueLog2ForCSE() is predictable, it should only be compiled once.";
}
testCSE();
// Verify log2() is not subject to DCE if the argument has side effects.
function opaqueLog2ForDCE(argument) {
Math.log2(argument);
}
noInline(opaqueLog2ForDCE);
noOSRExitFuzzing(opaqueLog2ForDCE);
function testDCE() {
let testObject = {
counter: 0,
valueOf: function() { ++this.counter; return 0.2; }
};
for (let i = 0; i < 1e4; ++i) {
opaqueLog2ForDCE(testObject);
}
if (testObject.counter !== 1e4)
throw "Failed testDCE()";
if (numberOfDFGCompiles(opaqueLog2ForDCE) > 1)
throw "opaqueLog2ForDCE() is predictable, it should only be compiled once.";
}
testDCE();
// Test exceptions in the argument.
function testException() {
let counter = 0;
function opaqueLog2WithException(argument) {
let result = Math.log2(argument);
++counter;
return result;
}
noInline(opaqueLog2WithException);
let testObject = { valueOf: () => { return 0.1; } };
let log2Result = Math.log2(0.1);
// Warm up without exception.
for (let i = 0; i < 1e3; ++i) {
if (opaqueLog2WithException(testObject) !== log2Result)
throw "Incorrect result in opaqueLog2WithException()";
}
let testThrowObject = { valueOf: () => { throw testObject; return 0.1; } };
for (let i = 0; i < 1e2; ++i) {
try {
if (opaqueLog2WithException(testThrowObject) !== 8)
throw "This code should not be reached!!";
} catch (e) {
if (e !== testObject) {
throw "Wrong object thrown from opaqueLog2WithException."
}
}
}
if (counter !== 1e3) {
throw "Invalid count in testException()";
}
}
testException();