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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Flags: --allow-natives-syntax
(function testMaybeAssignedWithShadowing() {
function foo() {
let a = 0;
let g;
with ({}) {
g = function g() {
// Increment a, should set it maybe_assigned but doesn't in the bug.
++a;
}
// Shadowing the outer 'a' with a dynamic one.
a;
}
return function () {
// The access to a would be context specialized (to 2 since it's after the
// second call) if maybe_assigned were incorrectly not set.
g(a);
return a;
}
};
f = foo();
%PrepareFunctionForOptimization(f);
assertEquals(f(), 1);
assertEquals(f(), 2);
%OptimizeFunctionOnNextCall(f);
assertEquals(f(), 3);
})();
// Same test as above, just with more shadowing (including dynamic->dynamic
// shadowing) and skipping over scopes with shadows.
(function testMaybeAssignedWithDeeplyNestedShadowing() {
function foo() {
let a = 0;
let g;
// Increment a, should set it maybe_assigned but doesn't in the bug.
with ({}) {
with ({}) {
with ({}) {
with ({}) {
with ({}) {
g = function g() { ++a; }
// Shadow the second dynamic 'a'.
a;
}
// Shadowing the first dynamic 'a'.
a;
}
// Skip shadowing here
}
// Skip shadowing here
}
// Shadowing the outer 'a' with a dynamic one.
a;
}
return function () {
// The access to a would be context specialized (to 2 since it's after the
// second call) if maybe_assigned were incorrectly not set.
g(a);
return a;
}
};
f = foo();
%PrepareFunctionForOptimization(f);
assertEquals(f(), 1);
assertEquals(f(), 2);
%OptimizeFunctionOnNextCall(f);
assertEquals(f(), 3);
})();
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