Allow inlining of functions containing %_Arguments.

test/mjsunit/compiler/inline-arguments.js

 // 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
@@ skipping 291 matching lines @@
     );
   }
 
   outer();
   outer();
   %OptimizeFunctionOnNextCall(outer);
   outer();
   delete forceDeopt.deopt;
   outer();
 })();
+
+
+// Test inlining of functions with %_Arguments and %_ArgumentsLength intrinsic.
+(function () {
+  function inner(len,a,b,c) {
+    assertSame(len, %_ArgumentsLength());
+    for (var i = 1; i < len; ++i) {
+      var c = String.fromCharCode(96 + i);
+      assertSame(c, %_Arguments(i));
+    }
+  }
+
+  function outer() {
+    inner(1);
+    inner(2, 'a');
+    inner(3, 'a', 'b');
+    inner(4, 'a', 'b', 'c');
+    inner(5, 'a', 'b', 'c', 'd');
+    inner(6, 'a', 'b', 'c', 'd', 'e');
+  }
+
+  outer();
+  outer();
+  %OptimizeFunctionOnNextCall(outer);
+  outer();
+})();