[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/mjsunit/compiler/regress-3249650.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.
+
+// Among other things, this code covers the case of deoptimization
+// after a compare expression in an effect context.
+
+function f0(x) { try { } catch (e) {}}
+function f1(x) { try { } catch (e) {}}
+function f2(x) { try { } catch (e) {}}
+function f3(x) { try { } catch (e) {}}
+
+var object = { a: "", b: false, c: {}};
+object.f = function(x) { return this; }
+
+
+function test(x) {
+  f0(x);
+  f1(x);
+  f2(x);
+  f3(x);
+  x.a.b == "";
+  object.f("A").b = true;
+  object.f("B").a = "";
+  object.f("C").c.display = "A";
+  object.f("D").c.display = "A";
+}
+
+var x = {a: {b: "" }};
+for (var i = 0; i < 1000000; i++) test(x);