[turbofan] Avoid going through ArgumentsAdaptorTrampoline for CSA/C++ builtins

test/mjsunit/regress/regress-709782.js

Index: test/mjsunit/regress/regress-709782.js
diff --git a/test/mjsunit/regress/regress-709782.js b/test/mjsunit/regress/regress-709782.js
new file mode 100644
index 0000000000000000000000000000000000000000..e33f694ec91d727ed62da53f66512b82885101ef
--- /dev/null
+++ b/test/mjsunit/regress/regress-709782.js
@@ -0,0 +1,14 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+var a = [0];
+function bar(x) { return x; }
+function foo() { return a.reduce(bar); }
+
+assertEquals(0, foo());
+assertEquals(0, foo());
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(0, foo());