[crankshaft] Do not optimize argument access if any parameter is context-allocated.

test/mjsunit/regress/regress-662845.js

Index: test/mjsunit/regress/regress-662845.js
diff --git a/test/mjsunit/compiler/regress-5158.js b/test/mjsunit/regress/regress-662845.js
similarity index 66%
copy from test/mjsunit/compiler/regress-5158.js
copy to test/mjsunit/regress/regress-662845.js
index ead5f4ed9d36bde7ddf9036f8f18bc11bc386ed3..7740ed10ff5c62234e5788e3c0c0782398f60414 100644
--- a/test/mjsunit/compiler/regress-5158.js
+++ b/test/mjsunit/regress/regress-662845.js
@@ -5,12 +5,11 @@
 // Flags: --allow-natives-syntax
 
 function foo(x) {
-  x = +x;
-  return (x > 0) ? x : 0 - x;
+  (function() { x = 1; })()
+  return arguments[0];
 }
 
-foo(1);
-foo(-1);
-foo(0);
+assertEquals(1, foo(42));
+assertEquals(1, foo(42));
 %OptimizeFunctionOnNextCall(foo);
-assertEquals(2147483648, foo(-2147483648));
+assertEquals(1, foo(42));