304 lines
9.6 KiB
JavaScript
304 lines
9.6 KiB
JavaScript
//@ skip if not $jitTests
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//@ defaultNoEagerRun
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"use strict";
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let validInputTestCases = [
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// input as string, expected result as string.
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["undefined", "NaN"],
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["null", "0"],
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["0", "0"],
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["-0.", "-0"],
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["0.5", "1"],
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["-0.5", "-0"],
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["4", "4"],
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["42.1", "42"],
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["42.5", "43"],
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["42.9", "43"],
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["-42.1", "-42"],
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["-42.5", "-42"],
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["-42.9", "-43"],
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["Math.PI", "3"],
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["Infinity", "Infinity"],
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["-Infinity", "-Infinity"],
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["NaN", "NaN"],
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["\"WebKit\"", "NaN"],
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["\"4\"", "4"],
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["\"42.5\"", "43"],
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["{ valueOf: () => { return 4; } }", "4"],
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["{ valueOf: () => { return 0; } }", "0"],
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["{ valueOf: () => { return -0; } }", "-0"],
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["{ valueOf: () => { return 0.5; } }", "1"],
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["{ valueOf: () => { return -0.5; } }", "-0"],
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["{ valueOf: () => { return Number.MIN_SAFE_INTEGER; } }", "-9007199254740991"],
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["{ valueOf: () => { return Number.MAX_SAFE_INTEGER; } }", "9007199254740991"],
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["{ valueOf: () => { return 0x80000000|0; } }", "-2147483648"],
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["{ valueOf: () => { return 0x7fffffff|0; } }", "2147483647"],
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["{ valueOf: () => { return (0x80000000|0) - 0.5; } }", "-2147483648"],
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["{ valueOf: () => { return (0x7fffffff|0) + 0.5; } }", "2147483648"],
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];
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let validInputTypedTestCases = validInputTestCases.map((element) => { return [eval("(" + element[0] + ")"), eval(element[1])] });
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function isIdentical(result, expected)
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{
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if (expected === expected) {
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if (result !== expected)
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return false;
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if (!expected && (1 / expected) !== (1 / result))
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return false;
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return true;
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}
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return result !== result;
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}
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// Test Math.round() without arguments.
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function opaqueRoundNoArgument() {
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return Math.round();
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}
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noInline(opaqueRoundNoArgument);
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noOSRExitFuzzing(opaqueRoundNoArgument);
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function testNoArgument() {
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for (let i = 0; i < 1e4; ++i) {
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let output = opaqueRoundNoArgument();
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if (!isIdentical(output, NaN)) {
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throw "Failed opaqueRoundNoArgument";
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}
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}
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if (numberOfDFGCompiles(opaqueRoundNoArgument) > 1)
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throw "The call without arguments should never exit.";
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}
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testNoArgument();
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// Test Math.round() with a very polymorphic input. All test cases are seen at each iteration.
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function opaqueAllTypesRound(argument) {
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return Math.round(argument);
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}
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noInline(opaqueAllTypesRound);
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noOSRExitFuzzing(opaqueAllTypesRound);
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function testAllTypesCall() {
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for (let i = 0; i < 1e3; ++i) {
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for (let testCaseInput of validInputTypedTestCases) {
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let output = opaqueAllTypesRound(testCaseInput[0]);
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if (!isIdentical(output, testCaseInput[1]))
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throw "Failed testAllTypesCall for input " + testCaseInput[0] + " expected " + testCaseInput[1] + " got " + output;
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}
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}
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if (numberOfDFGCompiles(opaqueAllTypesRound) > 3)
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throw "We should have detected round() was polymorphic and generated a generic version.";
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}
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testAllTypesCall();
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// Polymorphic input but negative zero is not observable.
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function opaqueAllTypesRoundWithoutNegativeZero(argument) {
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return Math.round(argument) + 0;
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}
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noInline(opaqueAllTypesRoundWithoutNegativeZero);
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noOSRExitFuzzing(opaqueAllTypesRoundWithoutNegativeZero);
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function testAllTypesWithoutNegativeZeroCall() {
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for (let i = 0; i < 1e3; ++i) {
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for (let testCaseInput of validInputTypedTestCases) {
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let output = opaqueAllTypesRoundWithoutNegativeZero(testCaseInput[0]);
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if (!isIdentical(output, testCaseInput[1] + 0))
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throw "Failed testAllTypesWithoutNegativeZeroCall for input " + testCaseInput[0] + " expected " + testCaseInput[1] + " got " + output;
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}
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}
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if (numberOfDFGCompiles(opaqueAllTypesRound) > 3)
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throw "We should have detected round() was polymorphic and generated a generic version.";
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}
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testAllTypesWithoutNegativeZeroCall();
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// Test Math.round() on a completely typed input. Every call see only one type.
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function testSingleTypeCall() {
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for (let testCaseInput of validInputTestCases) {
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eval(`
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function opaqueRound(argument) {
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return Math.round(argument);
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}
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noInline(opaqueRound);
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noOSRExitFuzzing(opaqueRound);
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for (let i = 0; i < 1e4; ++i) {
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if (!isIdentical(opaqueRound(${testCaseInput[0]}), ${testCaseInput[1]})) {
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throw "Failed testSingleTypeCall()";
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}
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}
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if (numberOfDFGCompiles(opaqueRound) > 1)
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throw "We should have compiled a single round for the expected type.";
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`);
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}
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}
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testSingleTypeCall();
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function checkCompileCountForUselessNegativeZero(testFunction)
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{
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return numberOfDFGCompiles(testFunction) <= 1;
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}
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// Test Math.round() on a completely typed input, but without negative zero.
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function testSingleTypeWithoutNegativeZeroCall() {
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for (let testCaseInput of validInputTestCases) {
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eval(`
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function opaqueRound(argument) {
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return Math.round(argument) + 0;
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}
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noInline(opaqueRound);
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noOSRExitFuzzing(opaqueRound);
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for (let i = 0; i < 1e4; ++i) {
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if (!isIdentical(opaqueRound(${testCaseInput[0]}), ${testCaseInput[1]} + 0)) {
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throw "Failed testSingleTypeWithoutNegativeZeroCall()";
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}
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}
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if (!checkCompileCountForUselessNegativeZero(opaqueRound))
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throw "We should have compiled a single round for the expected type.";
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`);
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}
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}
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testSingleTypeWithoutNegativeZeroCall();
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// Test Math.round() on constants
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function testConstant() {
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for (let testCaseInput of validInputTestCases) {
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eval(`
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function opaqueRoundOnConstant() {
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return Math.round(${testCaseInput[0]});
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}
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noInline(opaqueRoundOnConstant);
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noOSRExitFuzzing(opaqueRoundOnConstant);
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for (let i = 0; i < 1e4; ++i) {
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if (!isIdentical(opaqueRoundOnConstant(), ${testCaseInput[1]})) {
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throw "Failed testConstant()";
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}
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}
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if (numberOfDFGCompiles(opaqueRoundOnConstant) > 1)
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throw "We should have compiled a single round for the expected type.";
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`);
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}
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}
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testConstant();
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// Verify we call valueOf() exactly once per call.
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function opaqueRoundForSideEffects(argument) {
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return Math.round(argument);
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}
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noInline(opaqueRoundForSideEffects);
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noOSRExitFuzzing(opaqueRoundForSideEffects);
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function testSideEffect() {
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let testObject = {
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counter: 0,
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valueOf: function() { ++this.counter; return 16; }
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};
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let round16 = Math.round(16);
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for (let i = 0; i < 1e4; ++i) {
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if (opaqueRoundForSideEffects(testObject) !== round16)
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throw "Incorrect result in testSideEffect()";
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}
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if (testObject.counter !== 1e4)
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throw "Failed testSideEffect()";
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if (numberOfDFGCompiles(opaqueRoundForSideEffects) > 1)
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throw "opaqueRoundForSideEffects() is predictable, it should only be compiled once.";
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}
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testSideEffect();
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// Verify round() is not subject to CSE if the argument has side effects.
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function opaqueRoundForCSE(argument) {
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return Math.round(argument) + Math.round(argument) + Math.round(argument);
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}
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noInline(opaqueRoundForCSE);
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noOSRExitFuzzing(opaqueRoundForCSE);
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function testCSE() {
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let testObject = {
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counter: 0,
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valueOf: function() { ++this.counter; return 16; }
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};
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let round16 = Math.round(16);
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let threeRound16 = round16 + round16 + round16;
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for (let i = 0; i < 1e4; ++i) {
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if (opaqueRoundForCSE(testObject) !== threeRound16)
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throw "Incorrect result in testCSE()";
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}
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if (testObject.counter !== 3e4)
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throw "Failed testCSE()";
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if (numberOfDFGCompiles(opaqueRoundForCSE) > 1)
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throw "opaqueRoundForCSE() is predictable, it should only be compiled once.";
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}
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testCSE();
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// Verify round() is not subject to DCE if the argument has side effects.
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function opaqueRoundForDCE(argument) {
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Math.round(argument);
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}
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noInline(opaqueRoundForDCE);
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noOSRExitFuzzing(opaqueRoundForDCE);
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function testDCE() {
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let testObject = {
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counter: 0,
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valueOf: function() { ++this.counter; return 16; }
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};
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for (let i = 0; i < 1e4; ++i) {
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opaqueRoundForDCE(testObject);
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}
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if (testObject.counter !== 1e4)
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throw "Failed testDCE()";
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if (numberOfDFGCompiles(opaqueRoundForDCE) > 1)
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throw "opaqueRoundForDCE() is predictable, it should only be compiled once.";
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}
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testDCE();
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// Test exceptions in the argument.
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function testException() {
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let counter = 0;
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function opaqueRoundWithException(argument) {
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let result = Math.round(argument);
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++counter;
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return result;
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}
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noInline(opaqueRoundWithException);
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let testObject = { valueOf: () => { return 64; } };
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let round64 = Math.round(64);
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// Warm up without exception.
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for (let i = 0; i < 1e3; ++i) {
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if (opaqueRoundWithException(testObject) !== round64)
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throw "Incorrect result in opaqueRoundWithException()";
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}
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let testThrowObject = { valueOf: () => { throw testObject; return 64; } };
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for (let i = 0; i < 1e2; ++i) {
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try {
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if (opaqueRoundWithException(testThrowObject) !== 8)
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throw "This code should not be reached!!";
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} catch (e) {
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if (e !== testObject) {
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throw "Wrong object thrown from opaqueRoundWithException."
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}
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}
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}
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if (counter !== 1e3) {
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throw "Invalid count in testException()";
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}
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}
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testException();
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