diff -r 1e906304457b -r 30a0176b8af3 hotspot/src/share/vm/opto/lcm.cpp
--- a/hotspot/src/share/vm/opto/lcm.cpp	Thu Oct 13 12:27:39 2016 +0200
+++ b/hotspot/src/share/vm/opto/lcm.cpp	Mon Oct 10 17:04:42 2016 +0200
@@ -1147,6 +1147,8 @@
       // If this is the first failure, the sentinel string will "stick"
       // to the Compile object, and the C2Compiler will see it and retry.
       C->record_failure(C2Compiler::retry_no_subsuming_loads());
+    } else {
+      assert(false, "graph should be schedulable");
     }
     // assert( phi_cnt == end_idx(), "did not schedule all" );
     return false;