diff -r 3c15b4a3bf4d -r b6e5ad2f18d5 hotspot/src/share/vm/opto/ifnode.cpp
--- a/hotspot/src/share/vm/opto/ifnode.cpp	Mon May 11 09:44:07 2015 +0200
+++ b/hotspot/src/share/vm/opto/ifnode.cpp	Tue May 12 10:27:50 2015 +0200
@@ -973,21 +973,25 @@
           assert(init_n->Opcode() == Op_ConvI2L, "unexpected first node");
           Node* new_n = igvn->C->conv_I2X_index(igvn, l, array_size);
 
-          for (uint j = 2; j < stack.size(); j++) {
-            Node* n = stack.node_at(j);
-            Node* clone = n->clone();
-            int rep = clone->replace_edge(init_n, new_n);
+          // The type of the ConvI2L may be widen and so the new
+          // ConvI2L may not be better than an existing ConvI2L
+          if (new_n != init_n) {
+            for (uint j = 2; j < stack.size(); j++) {
+              Node* n = stack.node_at(j);
+              Node* clone = n->clone();
+              int rep = clone->replace_edge(init_n, new_n);
+              assert(rep > 0, "can't find expected node?");
+              clone = igvn->transform(clone);
+              init_n = n;
+              new_n = clone;
+            }
+            igvn->hash_delete(use);
+            int rep = use->replace_edge(init_n, new_n);
             assert(rep > 0, "can't find expected node?");
-            clone = igvn->transform(clone);
-            init_n = n;
-            new_n = clone;
-          }
-          igvn->hash_delete(use);
-          int rep = use->replace_edge(init_n, new_n);
-          assert(rep > 0, "can't find expected node?");
-          igvn->transform(use);
-          if (init_n->outcnt() == 0) {
-            igvn->_worklist.push(init_n);
+            igvn->transform(use);
+            if (init_n->outcnt() == 0) {
+              igvn->_worklist.push(init_n);
+            }
           }
         }
       } else if (use->in(0) == NULL && (igvn->type(use)->isa_long() ||