Allow inlining of functions containing %_Arguments.

test/mjsunit/compiler/inline-arguments.js

Index: test/mjsunit/compiler/inline-arguments.js
diff --git a/test/mjsunit/compiler/inline-arguments.js b/test/mjsunit/compiler/inline-arguments.js
index 1337ab237a4cadd8a053e6e95d0d58ffff717ccb..d52f31b5e9171fa22e248720e8d36c6bc976072c 100644
--- a/test/mjsunit/compiler/inline-arguments.js
+++ b/test/mjsunit/compiler/inline-arguments.js
@@ -309,3 +309,29 @@ test_toarr(toarr2);
   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();
+})();