Optimize Function.prototype.call

test/mjsunit/regress/regress-385565.js

+// Copyright 2014 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 --noalways-opt
+
+var calls = 0;
+
+function callsFReceiver(o) {
+    return [].f.call(new Number(o.m), 1, 2, 3);
+}
+
+// For the HConstant
+Array.prototype.f = function() {
+    calls++;
+    return +this;
+};
+
+
+var o1 = {m: 1};
+var o2 = {a: 0, m:1};
+
+var r1 = callsFReceiver(o1);
+callsFReceiver(o1);
+%OptimizeFunctionOnNextCall(callsFReceiver);
+var r2 = callsFReceiver(o1);
+assertOptimized(callsFReceiver);
+callsFReceiver(o2);
+assertUnoptimized(callsFReceiver);
+var r3 = callsFReceiver(o1);
+
+assertEquals(1, r1);
+assertTrue(r1 === r2);
+assertTrue(r2 === r3);
+
+r1 = callsFReceiver(o1);
+callsFReceiver(o1);
+%OptimizeFunctionOnNextCall(callsFReceiver);
+r2 = callsFReceiver(o1);
+callsFReceiver(o2);
+r3 = callsFReceiver(o1);
+
+assertEquals(1, r1);
+assertTrue(r1 === r2);
+assertTrue(r2 === r3);
+
+assertEquals(10, calls);