[turbofan] Only consider inhabited types for constant folding in typed lowering.

test/mjsunit/compiler/regress-621423.js

Index: test/mjsunit/compiler/regress-621423.js
diff --git a/test/mjsunit/regress/regress-crbug-577112.js b/test/mjsunit/compiler/regress-621423.js
similarity index 71%
copy from test/mjsunit/regress/regress-crbug-577112.js
copy to test/mjsunit/compiler/regress-621423.js
index 504f921a335801a51fd1c0c1a39a8b08e8872722..962176ffbff75281ae55fed8a05fb40158f0d6f1 100644
--- a/test/mjsunit/regress/regress-crbug-577112.js
+++ b/test/mjsunit/compiler/regress-621423.js
@@ -4,12 +4,18 @@
 
 // Flags: --allow-natives-syntax
 
-Array.prototype.__proto__ = null;
-var prototype = Array.prototype;
+var a = [0, ""];
+a[0] = 0;
+
+function g(array) {
+  array[1] = undefined;
+}
+
 function f() {
-  prototype.lastIndexOf({});
+  g(function() {});
+  g(a);
 }
-f();
+
 f();
 %OptimizeFunctionOnNextCall(f);
 f();