Disable special handling of flooring division by constant until it is fixed for real.

test/mjsunit/compiler/division-by-constant.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 --no-use-inlining
+
+// -----------------------------------------------------------------------------
+
+function ConstructDiv(divisor) {
+  return "return ((dividend | 0) / ((" + divisor  + ") | 0)) | 0";
+}
+
+var RefDivByConstI =
+  new Function("dividend", "divisor", ConstructDiv("divisor"));
+
+%NeverOptimizeFunction(RefDivByConstI);
+
+// -----------------------------------------------------------------------------
+
+function ConstructMod(divisor) {
+  return "return ((dividend | 0) % ((" + divisor  + ") | 0)) | 0";
+}
+
+var RefModByConstI =
+  new Function("dividend", "divisor", ConstructMod("divisor"));
+
+%NeverOptimizeFunction(RefModByConstI);
+
+// -----------------------------------------------------------------------------
+
+function ConstructFlooringDiv(divisor) {
+  return "return Math.floor(dividend / (" + divisor  + ")) | 0";
+}
+
+var RefFlooringDivByConstI =
+  new Function("dividend", "divisor", ConstructFlooringDiv("divisor"));
+
+%NeverOptimizeFunction(RefFlooringDivByConstI);
+
+// -----------------------------------------------------------------------------
+
+function PushSymmetric(values, x) {
+    values.push(x, -x);
+}
+
+function PushRangeSymmetric(values, from, to) {
+  for (var x = from; x <= to; x++) {
+    PushSymmetric(values, x);
+  }
+}
+
+function CreateTestValues() {
+  var values = [
+    // -(2^31)
+    -2147483648,
+    // Some values from "Hacker's Delight", chapter 10-7.
+    715827883, 1431655766, -1431655765, -1431655764,
+    // Some "randomly" chosen numbers.
+    123, -1234, 12345, -123456, 1234567, -12345678, 123456789
+  ];
+  // Powers of 2
+  for (var shift = 6; shift < 31; shift++) {
+    PushSymmetric(values, 1 << shift);
+  }
+  // Values near zero
+  PushRangeSymmetric(values, 1, 32);
+  // Various magnitudes
+  PushRangeSymmetric(values, 100, 109);
+  PushRangeSymmetric(values, 1000, 1009);
+  PushRangeSymmetric(values, 10000, 10009);
+  PushRangeSymmetric(values, 100000, 100009);
+  PushRangeSymmetric(values, 1000000, 1000009);
+  PushRangeSymmetric(values, 10000000, 10000009);
+  PushRangeSymmetric(values, 100000000, 100000009);
+  PushRangeSymmetric(values, 1000000000, 1000000009);
+  return values;
+}
+
+// -----------------------------------------------------------------------------
+
+function TestDivisionLike(ref, construct, values, divisor) {
+  // Define the function to test.
+  var OptFun = new Function("dividend", construct(divisor));
+
+  // Warm up type feedback.
+  OptFun(7);
+  OptFun(11);
+  %OptimizeFunctionOnNextCall(OptFun);
+  OptFun(13);
+
+  // Check results.
+  values.forEach(function(dividend) {
+    // Avoid deopt caused by overflow, we do not want to test this here.
+    if (dividend === -2147483648 && divisor === -1) return;
+    assertEquals(ref(dividend, divisor), OptFun(dividend));
+  });
+}
+
+function Test(ref, construct) {
+  var values = CreateTestValues();
+  values.forEach(function(divisor) {
+    TestDivisionLike(ref, construct, values, divisor);
+  });
+}
+
+Test(RefDivByConstI, ConstructDiv);
+Test(RefModByConstI, ConstructMod);
+Test(RefFlooringDivByConstI, ConstructFlooringDiv);