--- old/src/share/vm/opto/coalesce.cpp	2016-07-11 22:46:19.149473193 +0900
+++ new/src/share/vm/opto/coalesce.cpp	2016-07-11 22:46:19.012473672 +0900
@@ -292,7 +292,7 @@
               // Copy any flags as well
               _phc.clone_projs(pred, pred->end_idx(), m, copy, _phc._lrg_map);
             } else {
-              const RegMask *rm = C->matcher()->idealreg2spillmask[m->ideal_reg()];
+              const RegMask *rm = C->matcher()->idealreg2spillmask[static_cast<uint>(m->ideal_reg())];
               copy = new MachSpillCopyNode(MachSpillCopyNode::PhiInput, m, *rm, *rm);
               // Find a good place to insert.  Kinda tricky, use a subroutine
               insert_copy_with_overlap(pred,copy,phi_name,src_name);
@@ -326,7 +326,7 @@
               b->insert_node(copy, l++);
               l += _phc.clone_projs(b, l, m, copy, _phc._lrg_map);
             } else {
-              const RegMask *rm = C->matcher()->idealreg2spillmask[m->ideal_reg()];
+              const RegMask *rm = C->matcher()->idealreg2spillmask[static_cast<uint>(m->ideal_reg())];
               copy = new MachSpillCopyNode(MachSpillCopyNode::TwoAddress, m, *rm, *rm);
               // Insert the copy in the basic block, just before us
               b->insert_node(copy, l++);
@@ -373,7 +373,7 @@
               if( k < b->_num_succs )
                 continue;     // Live out; do not pre-split
               // Split the lrg at this use
-              const RegMask *rm = C->matcher()->idealreg2spillmask[inp->ideal_reg()];
+              const RegMask *rm = C->matcher()->idealreg2spillmask[static_cast<uint>(inp->ideal_reg())];
               Node* copy = new MachSpillCopyNode(MachSpillCopyNode::DebugUse, inp, *rm, *rm);
               // Insert the copy in the use-def chain
               n->set_req(inpidx, copy );