Version 3.20.11.1

test/mjsunit/compiler/dead-string-char-from-code.js

-// Copyright 2013 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: --allow-natives-syntax
-
-function dead1(a, b) {
-    var x = %_StringCharFromCode(a);
-    return a; // x is dead code
-}
-
-function dead2(a, b) {
-    var x = %_StringCharFromCode(a);
-    var y = %_StringCharFromCode(b);
-    return a; // x and y are both dead
-}
-
-function dead3(a, b) {
-    a = a ? 11 : 12;
-    b = b ? 13 : 14;
-    var x = %_StringCharFromCode(a);
-    var y = %_StringCharFromCode(b);
-    return a; // x and y are both dead
-}
-
-function test() {
-    assertEquals(33, dead1(33, 32));
-    assertEquals(33, dead2(33, 32));
-    assertEquals(11, dead3(33, 32));
-
-    assertEquals(31, dead1(31, 30));
-    assertEquals(31, dead2(31, 30));
-    assertEquals(11, dead3(31, 32));
-
-    assertEquals(0, dead1(0, 30));
-    assertEquals(0, dead2(0, 30));
-    assertEquals(12, dead3(0, 32));
-
-    assertEquals(true, dead1(true, 0));
-    assertEquals(true, dead2(true, 0));
-    assertEquals(11, dead3(true, 0));
-
-    assertEquals("true", dead1("true", 0));
-    assertEquals("true", dead2("true", 0));
-    assertEquals(11, dead3("true", 0));
-}
-
-test();
-test();
-%OptimizeFunctionOnNextCall(dead1);
-%OptimizeFunctionOnNextCall(dead2);
-%OptimizeFunctionOnNextCall(dead3);
-test();