Optimize loads from variables that might be shadowed by variables...

test/mjsunit/global-load-from-eval-in-with.js

+// Copyright 2009 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.
+
+// Tests global loads from eval inside of a with statement.
+
+var x = 27;
+
+function test(obj, source) {
+  with (obj) {
+    eval(source);
+  }
+}
+
+// Test shadowing in eval scope.
+test({ x: 42 }, "assertEquals(42, x)");
+test({ y: 42 }, "assertEquals(27, x)");
+
+// Test shadowing in local scope inside an eval scope.
+test({ x: 42 }, "function f() { assertEquals(42, x) }; f();");
+test({ y: 42 }, "function f() { assertEquals(27, x) }; f();");
+
+// Test shadowing in local scope inside an eval scope.  Deeper nesting
+// this time.
+test({ x: 42 }, "function f() { function g() { assertEquals(42, x) }; g() }; f();");
+test({ y: 42 }, "function f() { function g() { assertEquals(27, x) }; g() }; f();");
+
+// Test shadowing in local scope inside an eval scope with eval calls in the eval scopes.
+test({ x: 42 }, "function f() { eval('1'); assertEquals(42, x) }; f();");
+test({ y: 42 }, "function f() { eval('1'); assertEquals(27, x) }; f();");
+
+// Test shadowing in local scope inside an eval scope with eval calls
+// in the eval scopes.  Deeper nesting this time.
+test({ x: 42 }, "function f() { function g() { eval('1'); assertEquals(42, x) }; g() }; f();");
+test({ y: 42 }, "function f() { function g() { eval('1'); assertEquals(27, x) }; g() }; f();");
+