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// Test transpiling of LoadArgumentsObjectArgResult and cover all possible bailout conditions.
function blackhole() {
// Direct eval prevents any compile-time optimisations.
eval("");
}
function testConstantArgAccess() {
blackhole(arguments); // Create an arguments object.
for (var i = 0; i < 50; ++i) {
assertEq(arguments[0], 1);
}
}
for (var i = 0; i < 20; ++i) testConstantArgAccess(1);
function testDynamicArgAccess() {
blackhole(arguments); // Create an arguments object.
for (var i = 0; i < 50; ++i) {
assertEq(arguments[i & 1], 1 + (i & 1));
}
}
for (var i = 0; i < 20; ++i) testDynamicArgAccess(1, 2);
function markElementOveriddenIf(args, cond, value) {
with ({}) ; // Don't Warp compile to avoid cold code bailouts.
if (cond) {
Object.defineProperty(args, 0, {value});
}
}
function testBailoutElementReified() {
blackhole(arguments); // Create an arguments object.
for (var i = 0; i < 50; ++i) {
markElementOveriddenIf(arguments, i === 25, 2);
var expected = 1 + (i >= 25);
assertEq(arguments[0], expected);
}
}
for (var i = 0; i < 20; ++i) testBailoutElementReified(1);
function markLengthOveriddenIf(args, cond, value) {
with ({}) ; // Don't Warp compile to avoid cold code bailouts.
if (cond) {
args.length = value;
}
}
function testBailoutLengthReified() {
blackhole(arguments); // Create an arguments object.
for (var i = 0; i < 50; ++i) {
markLengthOveriddenIf(arguments, i === 25, 0);
assertEq(arguments[0], 1);
}
}
for (var i = 0; i < 20; ++i) testBailoutLengthReified(1);
function deleteElementIf(args, cond) {
with ({}) ; // Don't Warp compile to avoid cold code bailouts.
if (cond) {
delete args[0];
}
}
function testBailoutElementDeleted() {
blackhole(arguments); // Create an arguments object.
// Load expected values from an array to avoid possible cold code bailouts.
var values = [1, undefined];
for (var i = 0; i < 50; ++i) {
deleteElementIf(arguments, i === 25);
var expected = values[0 + (i >= 25)];
assertEq(arguments[0], expected);
}
}
for (var i = 0; i < 20; ++i) testBailoutElementDeleted(1);
function testBailoutOutOfBounds() {
blackhole(arguments); // Create an arguments object.
// Load expected values from an array to avoid possible cold code bailouts.
var values = [1, undefined];
for (var i = 0; i < 50; ++i) {
var index = 0 + (i >= 25);
var expected = values[index];
assertEq(arguments[index], expected);
}
}
for (var i = 0; i < 20; ++i) testBailoutOutOfBounds(1);
function testBailoutArgForwarded(arg1, arg2) {
blackhole(arguments); // Create an arguments object.
blackhole(() => arg2); // Ensure |arg2| is marked as "forwarded".
for (var i = 0; i < 50; ++i) {
var index = 0 + (i >= 25);
var expected = 1 + (i >= 25);
assertEq(arguments[index], expected);
}
}
for (var i = 0; i < 20; ++i) testBailoutArgForwarded(1, 2);
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