--- a/src/share/vm/memory/virtualspace.cpp	Thu Aug 24 23:54:53 2017 +0000
+++ b/src/share/vm/memory/virtualspace.cpp	Thu Aug 24 10:26:32 2017 -0700
@@ -582,7 +582,7 @@
   assert(markOopDesc::encode_pointer_as_mark(&_base[size])->decode_pointer() == &_base[size],
          "area must be distinguishable from marks for mark-sweep");
 
-  if (base() > 0) {
+  if (base() != NULL) {
     MemTracker::record_virtual_memory_type((address)base(), mtJavaHeap);
   }
 }

--- a/src/share/vm/opto/lcm.cpp	Thu Aug 24 23:54:53 2017 +0000
+++ b/src/share/vm/opto/lcm.cpp	Thu Aug 24 10:26:32 2017 -0700
@@ -39,7 +39,7 @@
 // Check whether val is not-null-decoded compressed oop,
 // i.e. will grab into the base of the heap if it represents NULL.
 static bool accesses_heap_base_zone(Node *val) {
-  if (Universe::narrow_oop_base() > 0) { // Implies UseCompressedOops.
+  if (Universe::narrow_oop_base() != NULL) { // Implies UseCompressedOops.
     if (val && val->is_Mach()) {
       if (val->as_Mach()->ideal_Opcode() == Op_DecodeN) {
         // This assumes all Decodes with TypePtr::NotNull are matched to nodes that

--- a/src/share/vm/opto/loopPredicate.cpp	Thu Aug 24 23:54:53 2017 +0000
+++ b/src/share/vm/opto/loopPredicate.cpp	Thu Aug 24 10:26:32 2017 -0700
@@ -912,7 +912,7 @@
       Node*          idx    = cmp->in(1);
       assert(!invar.is_invariant(idx), "index is variant");
       Node* rng = cmp->in(2);
-      assert(rng->Opcode() == Op_LoadRange || _igvn.type(rng)->is_int() >= 0, "must be");
+      assert(rng->Opcode() == Op_LoadRange || iff->is_RangeCheck() || _igvn.type(rng)->is_int()->_lo >= 0, "must be");
       assert(invar.is_invariant(rng), "range must be invariant");
       int scale    = 1;
       Node* offset = zero;