Custom call IC for Math.abs.

test/mjsunit/math-abs.js

Index: test/mjsunit/math-abs.js
diff --git a/test/mjsunit/math-abs.js b/test/mjsunit/math-abs.js
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+// Copyright 2010 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: --max-new-space-size=262144
+
+function zero() {
+  var x = 0.5;
+  return (function() { return x - 0.5; })();
+}
+
+function test() {
+  assertEquals(0, Math.abs(0));
+  assertEquals(0, Math.abs(zero()));
+  assertEquals(1/0, 1/Math.abs(-0));  // 0 == -0, so we use reciprocals.
+  assertEquals(Infinity, Math.abs(Infinity));
+  assertEquals(Infinity, Math.abs(-Infinity));
+  assertNaN(Math.abs(NaN));
+  assertNaN(Math.abs(-NaN));
+  assertEquals('Infinity', Math.abs(Number('+Infinity').toString()));
+  assertEquals('Infinity', Math.abs(Number('-Infinity').toString()));
+  assertEquals('NaN', Math.abs(NaN).toString());
+  assertEquals('NaN', Math.abs(-NaN).toString());
+
+  assertEquals(0.1, Math.abs(0.1));
+  assertEquals(0.5, Math.abs(0.5));
+  assertEquals(0.1, Math.abs(-0.1));
+  assertEquals(0.5, Math.abs(-0.5));
+  assertEquals(1, Math.abs(1));
+  assertEquals(1.1, Math.abs(1.1));
+  assertEquals(1.5, Math.abs(1.5));
+  assertEquals(1, Math.abs(-1));
+  assertEquals(1.1, Math.abs(-1.1));
+  assertEquals(1.5, Math.abs(-1.5));
+
+  assertEquals(Number.MIN_VALUE, Math.abs(Number.MIN_VALUE));
+  assertEquals(Number.MIN_VALUE, Math.abs(-Number.MIN_VALUE));
+  assertEquals(Number.MAX_VALUE, Math.abs(Number.MAX_VALUE));
+  assertEquals(Number.MAX_VALUE, Math.abs(-Number.MAX_VALUE));
+
+  // 2^30 is a smi boundary on arm and ia32.
+  var two_30 = 1 << 30;
+
+  assertEquals(two_30, Math.abs(two_30));
+  assertEquals(two_30, Math.abs(-two_30));
+
+  assertEquals(two_30 + 1, Math.abs(two_30 + 1));
+  assertEquals(two_30 + 1, Math.abs(-two_30 - 1));
+
+  assertEquals(two_30 - 1, Math.abs(two_30 - 1));
+  assertEquals(two_30 - 1, Math.abs(-two_30 + 1));
+
+  // 2^31 is a smi boundary on x64.
+  var two_31 = 2 * two_30;
+
+  assertEquals(two_31, Math.abs(two_31));
+  assertEquals(two_31, Math.abs(-two_31));
+
+  assertEquals(two_31 + 1, Math.abs(two_31 + 1));
+  assertEquals(two_31 + 1, Math.abs(-two_31 - 1));
+
+  assertEquals(two_31 - 1, Math.abs(two_31 - 1));
+  assertEquals(two_31 - 1, Math.abs(-two_31 + 1));
+
+  assertNaN(Math.abs("not a number"));
+  assertNaN(Math.abs([1, 2, 3]));
+  assertEquals(42, Math.abs({valueOf: function() { return 42; } }));
+  assertEquals(42, Math.abs({valueOf: function() { return -42; } }));
+}
+
+
+// Test in a loop to cover the custom IC and GC-related issues.
+for (var i = 0; i < 500; i++) {
+  test();
+}