v8/test/mjsunit/regress/regress-crbug-884933.js

// Copyright 2018 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

// Test Uint8 -> Word64 conversions.
(function() {
function bar(x, y) {
  return x + y;
}

bar(0.1, 0.2);
bar(0.1, 0.2);

function foo(dv) {
  return bar(dv.getUint8(0, true), 0xFFFFFFFF);
};
%PrepareFunctionForOptimization(foo);
const dv = new DataView(new ArrayBuffer(8));
assertEquals(0xFFFFFFFF, foo(dv));
assertEquals(0xFFFFFFFF, foo(dv));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0xFFFFFFFF, foo(dv));
})();

// Test Int8 -> Word64 conversions.
(function() {
function bar(x, y) {
  return x + y;
}

bar(0.1, 0.2);
bar(0.1, 0.2);

function foo(dv) {
  return bar(dv.getInt8(0, true), 0xFFFFFFFF);
};
%PrepareFunctionForOptimization(foo);
const dv = new DataView(new ArrayBuffer(8));
assertEquals(0xFFFFFFFF, foo(dv));
assertEquals(0xFFFFFFFF, foo(dv));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0xFFFFFFFF, foo(dv));
})();

// Test Uint16 -> Word64 conversions.
(function() {
function bar(x, y) {
  return x + y;
}

bar(0.1, 0.2);
bar(0.1, 0.2);

function foo(dv) {
  return bar(dv.getUint16(0, true), 0xFFFFFFFF);
};
%PrepareFunctionForOptimization(foo);
const dv = new DataView(new ArrayBuffer(8));
assertEquals(0xFFFFFFFF, foo(dv));
assertEquals(0xFFFFFFFF, foo(dv));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0xFFFFFFFF, foo(dv));
})();

// Test Int16 -> Word64 conversions.
(function() {
function bar(x, y) {
  return x + y;
}

bar(0.1, 0.2);
bar(0.1, 0.2);

function foo(dv) {
  return bar(dv.getInt16(0, true), 0xFFFFFFFF);
};
%PrepareFunctionForOptimization(foo);
const dv = new DataView(new ArrayBuffer(8));
assertEquals(0xFFFFFFFF, foo(dv));
assertEquals(0xFFFFFFFF, foo(dv));
%OptimizeFunctionOnNextCall(foo);
assertEquals(0xFFFFFFFF, foo(dv));
})();