[crankshaft] Only exclude explicit 'arguments' (and 'this') from liveness analysis.

test/mjsunit/regress/regress-612146.js

Index: test/mjsunit/regress/regress-612146.js
diff --git a/test/mjsunit/regress/regress-opt-typeof-null.js b/test/mjsunit/regress/regress-612146.js
similarity index 56%
copy from test/mjsunit/regress/regress-opt-typeof-null.js
copy to test/mjsunit/regress/regress-612146.js
index e4721a18c5e0fb95a3b7cb323f229de9f605b64a..e60827e4e114177df557de9dc75c9182a6f2a043 100644
--- a/test/mjsunit/regress/regress-opt-typeof-null.js
+++ b/test/mjsunit/regress/regress-612146.js
@@ -5,8 +5,18 @@
 // Flags: --allow-natives-syntax
 
 function f() {
-  return typeof null === "object";
+  var arguments_ = arguments;
+  if (undefined) {
+    while (true) {
+      arguments_[0];
+    }
+  } else {
+    %DeoptimizeNow();
+    return arguments_[0];
+  }
 };
 
+f(0);
+f(0);
 %OptimizeFunctionOnNextCall(f);
-assertTrue(f());
+assertEquals(1, f(1));