test/mjsunit/compiler/globals.js

// Copyright 2009 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.

// Test references and assignments to global variables.
var g = 0;

// Test compilation of a global variable store.
assertEquals(1, eval('g = 1'));
// Test that the store worked.
assertEquals(1, g);

// Test that patching the IC in the compiled code works.
assertEquals(1, eval('g = 1'));
assertEquals(1, g);
assertEquals(1, eval('g = 1'));
assertEquals(1, g);

// Test a second store.
assertEquals("2", eval('g = "2"'));
assertEquals("2", g);

// Test a load.
assertEquals("2", eval('g'));

// Test that patching the IC in the compiled code works.
assertEquals("2", eval('g'));
assertEquals("2", eval('g'));

// Test a second load.
g = 3;
assertEquals(3, eval('g'));

// Test postfix count operation
var t;
t = g++;
assertEquals(3, t);
assertEquals(4, g);

code = "g--; 1";
assertEquals(1, eval(code));
assertEquals(3, g);