v8/test/mjsunit/harmony/block-let-crankshaft.js

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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --harmony-scoping --allow-natives-syntax --noparallel-recompilation
// TODO(ES6): properly activate extended mode
"use strict";
// Check that the following functions are optimizable.
var functions = [ f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14,
f15, f16, f17, f18, f19, f20, f21, f22, f23 ];
for (var i = 0; i < functions.length; ++i) {
var func = functions[i];
print("Testing:");
print(func);
for (var j = 0; j < 10; ++j) {
func(12);
}
%OptimizeFunctionOnNextCall(func);
func(12);
assertTrue(%GetOptimizationStatus(func) != 2);
}
function f1() { }
function f2(x) { }
function f3() {
let x;
}
function f4() {
function foo() {
}
}
function f5() {
let x = 1;
}
function f6() {
const x = 1;
}
function f7(x) {
return x;
}
function f8() {
let x;
return x;
}
function f9() {
function x() {
}
return x;
}
function f10(x) {
x = 1;
}
function f11() {
let x;
x = 1;
}
function f12() {
function x() {};
x = 1;
}
function f13(x) {
(function() { x; });
}
function f14() {
let x;
(function() { x; });
}
function f15() {
function x() {
}
(function() { x; });
}
function f16() {
let x = 1;
(function() { x; });
}
function f17() {
const x = 1;
(function() { x; });
}
function f18(x) {
return x;
(function() { x; });
}
function f19() {
let x;
return x;
(function() { x; });
}
function f20() {
function x() {
}
return x;
(function() { x; });
}
function f21(x) {
x = 1;
(function() { x; });
}
function f22() {
let x;
x = 1;
(function() { x; });
}
function f23() {
function x() { }
x = 1;
(function() { x; });
}
// Test that temporal dead zone semantics for function and block scoped
// let bindings are handled by the optimizing compiler.
function TestFunctionLocal(s) {
'use strict';
var func = eval("(function baz(){" + s + "; })");
print("Testing:");
print(func);
for (var i = 0; i < 5; ++i) {
try {
func();
assertUnreachable();
} catch (e) {
assertInstanceof(e, ReferenceError);
}
}
%OptimizeFunctionOnNextCall(func);
try {
func();
assertUnreachable();
} catch (e) {
assertInstanceof(e, ReferenceError);
}
}
function TestFunctionContext(s) {
'use strict';
var func = eval("(function baz(){ " + s + "; (function() { x; }); })");
print("Testing:");
print(func);
for (var i = 0; i < 5; ++i) {
print(i);
try {
func();
assertUnreachable();
} catch (e) {
assertInstanceof(e, ReferenceError);
}
}
print("optimize");
%OptimizeFunctionOnNextCall(func);
try {
print("call");
func();
assertUnreachable();
} catch (e) {
print("catch");
assertInstanceof(e, ReferenceError);
}
}
function TestAll(s) {
TestFunctionLocal(s);
TestFunctionContext(s);
}
// Use before initialization in declaration statement.
TestAll('let x = x + 1');
TestAll('let x = x += 1');
TestAll('let x = x++');
TestAll('let x = ++x');
TestAll('const x = x + 1');
// Use before initialization in prior statement.
TestAll('x + 1; let x;');
TestAll('x = 1; let x;');
TestAll('x += 1; let x;');
TestAll('++x; let x;');
TestAll('x++; let x;');
TestAll('let y = x; const x = 1;');
function f(x, b) {
let y = (b ? y : x) + 42;
return y;
}
function g(x, b) {
{
let y = (b ? y : x) + 42;
return y;
}
}
for (var i=0; i<10; i++) {
f(i, false);
g(i, false);
}
%OptimizeFunctionOnNextCall(f);
%OptimizeFunctionOnNextCall(g);
try {
f(42, true);
} catch (e) {
assertInstanceof(e, ReferenceError);
}
try {
g(42, true);
} catch (e) {
assertInstanceof(e, ReferenceError);
}