Fix error in optimized x.apply(y, arguments) code generation on ARM. Fixes...

Fix error in optimized x.apply(y, arguments) code generation on ARM.  Fixes issue 784.  Adds regression test.
Review URL: http://codereview.chromium.org/3048035

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5144 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/codegen-arm.cc

@@ -1628,6 +1628,7 @@ void CodeGenerator::CallApplyLazy(Expression* applicand,
   // The function and its two arguments have been dropped.
   frame_->Drop();  // Drop the receiver as well.
   frame_->EmitPush(r0);
+  frame_->SpillAll();  // A spilled frame is also jumping to label done.
   // Stack now has 1 element:
   //   sp[0]: result
   __ bind(&done);

test/mjsunit/regress/regress-784.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.
+
+// Test that CallApplyLazy, generating optimized code for apply calls of the
+// form x.apply(y, arguments), does not leave an extra copy of the result
+// on the stack.
+
+// See http://code.google.com/p/v8/issues/detail?id=784
+
+A = {x:{y:function(i){return i;}}};
+B = function(x){return 17;};
+
+foo = function () {
+  A.x.y(B.apply(this, arguments));
+};
+
+foo();
+foo("Hello", "There");