[turbofan] Kill type Guard nodes during effect/control linearization.

test/mjsunit/regress/regress-crbug-612142.js

Index: test/mjsunit/regress/regress-crbug-612142.js
diff --git a/test/mjsunit/regress/regress-crbug-612142.js b/test/mjsunit/regress/regress-crbug-612142.js
new file mode 100644
index 0000000000000000000000000000000000000000..de2dc8d04ac58272ccb928cc658635c3d9ebfcbd
--- /dev/null
+++ b/test/mjsunit/regress/regress-crbug-612142.js
@@ -0,0 +1,10 @@
+// Copyright 2016 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.
+
+var thrower = {[Symbol.toPrimitive]: function(e) { throw e }};
+try {
+  for (var i = 0; i < 10; i++) { }
+  for (var i = 0.5; i < 100000; ++i) { }
+  for (var i = 16 | 0 || 0 || this || 1; i;) { String.fromCharCode(thrower); }
+} catch (e) { }