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// Test transpiling of LoadArgumentsObjectLengthResult and cover all possible bailout conditions.
function blackhole() {
// Direct eval prevents any compile-time optimisations.
eval("");
}
function testLengthAccess() {
blackhole(arguments); // Create an arguments object.
for (var i = 0; i < 50; ++i) {
assertEq(arguments.length, 1);
}
}
for (var i = 0; i < 20; ++i) testLengthAccess(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);
var expected = 0 + (i < 25);
assertEq(arguments.length, expected);
}
}
for (var i = 0; i < 20; ++i) testBailoutLengthReified(1);
function deleteLengthIf(args, cond) {
with ({}) ; // Don't Warp compile to avoid cold code bailouts.
if (cond) {
delete args.length;
}
}
function testBailoutLengthDeleted() {
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) {
deleteLengthIf(arguments, i === 25);
var expected = values[0 + (i >= 25)];
assertEq(arguments.length, expected);
}
}
for (var i = 0; i < 20; ++i) testBailoutLengthDeleted(1);