a0a8ecd078
These were all on by default in M49 without complaint. R=littledan@chromium.org Review URL: https://codereview.chromium.org/1858943002 Cr-Commit-Position: refs/heads/master@{#35342}
86 lines
1.9 KiB
JavaScript
86 lines
1.9 KiB
JavaScript
// Copyright 2015 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.
|
|
|
|
// See: http://code.google.com/p/v8/issues/detail?id=3926
|
|
|
|
// Switch statements should disable hole check elimination
|
|
|
|
// Ensure that both reads and writes encounter the hole check
|
|
// FullCodeGen had an issue on reads; TurboFan had an issue on writes
|
|
function f(x) {
|
|
var z;
|
|
switch (x) {
|
|
case 1:
|
|
let y = 1;
|
|
case 2:
|
|
y = 2;
|
|
case 3:
|
|
z = y;
|
|
}
|
|
return z;
|
|
}
|
|
assertEquals(2, f(1));
|
|
assertThrows(function() {f(2)}, ReferenceError);
|
|
assertThrows(function() {f(3)}, ReferenceError);
|
|
|
|
// Ensure that hole checks are done even in subordinate scopes
|
|
assertThrows(function() {
|
|
switch (1) {
|
|
case 0:
|
|
let x = 2;
|
|
case 1:
|
|
{ // this block, plus the let below, adds another linear lexical scope
|
|
let y = 3;
|
|
x;
|
|
}
|
|
}
|
|
}, ReferenceError);
|
|
|
|
// Ensure that inner functions and eval don't skip hole checks
|
|
|
|
function g(x) {
|
|
switch (x) {
|
|
case 1:
|
|
let z;
|
|
case 2:
|
|
return function() { z = 1; }
|
|
case 3:
|
|
return function() { return z; }
|
|
case 4:
|
|
return eval("z = 1");
|
|
case 5:
|
|
return eval("z");
|
|
}
|
|
}
|
|
|
|
assertEquals(undefined, g(1)());
|
|
assertThrows(g(2), ReferenceError);
|
|
assertThrows(g(3), ReferenceError);
|
|
assertThrows(function () {g(4)}, ReferenceError);
|
|
assertThrows(function () {g(5)}, ReferenceError);
|
|
|
|
// Ensure the same in strict mode, with different eval and function semantics
|
|
|
|
function h(x) {
|
|
'use strict'
|
|
switch (x) {
|
|
case 1:
|
|
let z;
|
|
case 2:
|
|
return function() { z = 1; }
|
|
case 3:
|
|
return function() { return z; }
|
|
case 4:
|
|
return eval("z = 1");
|
|
case 5:
|
|
return eval("z");
|
|
}
|
|
}
|
|
|
|
assertEquals(undefined, h(1)());
|
|
assertThrows(h(2), ReferenceError);
|
|
assertThrows(h(3), ReferenceError);
|
|
assertThrows(function () {h(4)}, ReferenceError);
|
|
assertThrows(function () {h(5)}, ReferenceError);
|