Fix error in x64 fast smi loops, change 4998.

test/mjsunit/regress/regress-r4998.js

Index: test/mjsunit/regress/regress-r4998.js
===================================================================
--- test/mjsunit/regress/regress-r4998.js	(revision 0)
+++ test/mjsunit/regress/regress-r4998.js	(revision 0)
@@ -0,0 +1,81 @@
+// 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.
+
+// Test for a broken fast-smi-loop that does not save the incremented value
+// of the loop index.  If this test fails, it loops forever, and times out.
+
+// Flags: --nofull-compiler
+
+// Calling foo() spills the virtual frame.
+function foo() {
+  return;
+}
+
+function bar() {
+  var x1 = 3;
+  var x2 = 3;
+  var x3 = 3;
+  var x4 = 3;
+  var x5 = 3;
+  var x6 = 3;
+  var x7 = 3;
+  var x8 = 3;
+  var x9 = 3;
+  var x10 = 3;
+  var x11 = 3;
+  var x12 = 3;
+  var x13 = 3;
+
+  foo();
+
+  x1 = 257;
+  x2 = 258;
+  x3 = 259;
+  x4 = 260;
+  x5 = 261;
+  x6 = 262;
+  x7 = 263;
+  x8 = 264;
+  x9 = 265;
+  x10 = 266;
+  x11 = 267;
+  x12 = 268;
+  x13 = 269;
+
+  // The loop variable x7 is initialized to 3,
+  // and then MakeMergeable is called on the virtual frame.
+  // MakeMergeable has forced the loop variable x7 to be spilled,
+  // so it is marked as synced
+  // The back edge then merges its virtual frame, which incorrectly
+  // claims that x7 is synced, and does not save the modified
+  // value.
+  for (x7 = 3; x7 < 10; ++x7) {
+    foo();
+  }
+}
+
+bar();
Property changes on: test/mjsunit/regress/regress-r4998.js
___________________________________________________________________
Added: svn:eol-style
   + LF