[Isolates] Merge crankshaft (r5922 from bleeding_edge).

test/mjsunit/compiler/variables.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.
+
+// Simple tests of the various kinds of variable references in the
+// implementstion.
+
+// Global variables.
+var x = 0;
+function f0() { return x; }
+assertEquals(0, f0());
+
+
+// Parameters.
+function f1(x) { return x; }
+assertEquals(1, f1(1));
+
+
+// Stack-allocated locals.
+function f2() { var x = 2; return x; }
+assertEquals(2, f2());
+
+
+// Context-allocated locals.  Local function forces x into f3's context.
+function f3(x) {
+  function g() { return x; }
+  return x;
+}
+assertEquals(3, f3(3));
+
+// Local function reads x from an outer context.
+function f4(x) {
+  function g() { return x; }
+  return g();
+}
+assertEquals(4, f4(4));
+
+
+// Lookup slots.  'With' forces x to be looked up at runtime.
+function f5(x) {
+  with ({}) return x;
+}
+assertEquals(5, f5(5));
+
+
+// Parameters rewritten to property accesses.  Using the name 'arguments'
+// (even if it shadows the arguments object) forces all parameters to be
+// rewritten to explicit property accesses.
+function f6(arguments) { return arguments; }
+assertEquals(6, f6(6));