Strict mode fixes.

test/mjsunit/strict-mode-opt.js

Index: test/mjsunit/strict-mode-opt.js
diff --git a/test/mjsunit/strict-mode-opt.js b/test/mjsunit/strict-mode-opt.js
new file mode 100644
index 0000000000000000000000000000000000000000..36dfe5ba2f4c70ae09758277afe18b2ac199a6a3
--- /dev/null
+++ b/test/mjsunit/strict-mode-opt.js
@@ -0,0 +1,98 @@
+// Copyright 2011 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.
+
+var global = 0;
+var MAX = 10000000;

[Lasse Reichstein, 2011/04/08 12:54:18]

That's a lot. Is it really necessary?
Are there any flags you could use to make optimization more frequent so you
don't need as big a loop?

[Martin Maly, 2011/04/08 14:27:39]

Turns out we inline even with one zero removed so I am taking one zero out for
the landing

+
+// Attempt to inline strcit in non-strict.
+
+function strictToBeInlined(n) {
+  "use strict";
+  global = "strict";
+  if (n == MAX) { undefined_variable_strict = "value"; }
+}
+
+function nonstrictCallStrict(n) {
+  strictToBeInlined(n);
+}
+
+(function testInlineStrictInNonStrict() {
+  for (var i = 0; i <= MAX; i ++) {
+    try {
+      nonstrictCallStrict(i);
+    } catch (e) {
+      assertInstanceof(e, ReferenceError);
+      assertEquals(MAX, i);
+      return;
+    }
+  }
+  fail("ReferenceError after MAX iterations", "no exception");
+})();
+
+// Attempt to inline non-strict in strict.
+
+function nonstrictToBeInlined(n) {
+  global = "nonstrict";
+  if (n == MAX) { undefined_variable_nonstrict = "The nonstrict value"; }
+}
+
+function strictCallNonStrict(n) {
+  "use strict";
+  nonstrictToBeInlined(n);
+}
+
+(function testInlineNonStrictInStrict() {
+  for (var i = 0; i <= MAX; i ++) {
+    try {
+      strictCallNonStrict(i);
+    } catch (e) {
+      fail("no exception", "exception");
+    }
+  }
+  assertEquals("The nonstrict value", undefined_variable_nonstrict);
+})();
+
+// Optimize strict function.
+
+function strictAssignToUndefined(n) {
+  "use strict";
+  global = "strict";
+  if (n == MAX) { undefined_variable_strict_2 = "value"; }
+}
+
+(function testOptimizeStrictAssignToUndefined() {
+  for (var i = 0; i <= MAX; i ++) {
+    try {
+      strictAssignToUndefined(i);
+    } catch (e) {
+      assertInstanceof(e, ReferenceError);
+      assertEquals(MAX, i);
+      return;
+    }
+  }
+  fail("ReferenceError after MAX iterations", "no exception");
+})();