Migrated several tests from blink to V8 repository.

test/webkit/function-call-register-allocation.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  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.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+
+description(
+"This test checks for a specific regression that caused function calls to allocate too many temporary registers."
+);
+
+var message = "PASS: Recursion did not run out of stack space."
+try {
+    // Call a function recursively.
+    (function f(g, x) {
+        if (x > 3000)
+            return;
+
+        // Do lots of function calls -- when the bug was present, each
+        // of these calls would allocate a new temporary register. We can
+        // detect profligate register allocation because it will substantially
+        // curtail our recursion limit.
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+        g(); g(); g(); g(); g(); g(); g(); g(); g(); g();
+
+        f(g, ++x);
+    })(function() {}, 0);
+} catch(e) {
+    message = "FAIL: Recursion threw an exception: " + e;
+}
+
+debug(message);