[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/mjsunit/compiler/compare.js

+// 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.
+
+function MaxLT(x, y) {
+  if (x < y) return y;
+  return x;
+}
+
+function MaxLE(x, y) {
+  if (x <= y) return y;
+  return x;
+}
+
+function MaxGE(x, y) {
+  if (x >= y) return x;
+  return y;
+}
+
+function MaxGT(x, y) {
+  if (x > y) return x;
+  return y;
+}
+
+
+// First test primitive values.
+function TestPrimitive(max, x, y) {
+  assertEquals(max, MaxLT(x, y), "MaxLT - primitive");
+  assertEquals(max, MaxLE(x, y), "MaxLE - primitive");
+  assertEquals(max, MaxGE(x, y), "MaxGE - primitive");
+  assertEquals(max, MaxGT(x, y), "MaxGT - primitive");
+}
+
+TestPrimitive(1, 0, 1);
+TestPrimitive(1, 1, 0);
+TestPrimitive(4, 3, 4);
+TestPrimitive(4, 4, 3);
+TestPrimitive(0, -1, 0);
+TestPrimitive(0, 0, -1)
+TestPrimitive(-2, -2, -3);
+TestPrimitive(-2, -3, -2);
+
+TestPrimitive(1, 0.1, 1);
+TestPrimitive(1, 1, 0.1);
+TestPrimitive(4, 3.1, 4);
+TestPrimitive(4, 4, 3.1);
+TestPrimitive(0, -1.1, 0);
+TestPrimitive(0, 0, -1.1)
+TestPrimitive(-2, -2, -3.1);
+TestPrimitive(-2, -3.1, -2);
+
+
+// Test non-primitive values and watch for valueOf call order.
+function TestNonPrimitive(order, f) {
+  var result = "";
+  var x = { valueOf: function() { result += "x"; } };
+  var y = { valueOf: function() { result += "y"; } };
+  f(x, y);
+  assertEquals(order, result);
+}
+
+TestNonPrimitive("xy", MaxLT);
+TestNonPrimitive("yx", MaxLE);
+TestNonPrimitive("xy", MaxGE);
+TestNonPrimitive("yx", MaxGT);
+
+// Test compare in case of aliased registers.
+function CmpX(x) { if (x == x) return 42; }
+assertEquals(42, CmpX(0));
+
+function CmpXY(x) { var y = x; if (x == y) return 42; }
+assertEquals(42, CmpXY(0));
+
+
+// Test compare against null.
+function CmpNullValue(x) { return x == null; }
+assertEquals(false, CmpNullValue(42));
+
+function CmpNullTest(x) { if (x == null) return 42; return 0; }
+assertEquals(42, CmpNullTest(null));
+
+var g1 = 0;
+function CmpNullEffect() { (g1 = 42) == null; }
+CmpNullEffect();
+assertEquals(42, g1);