src/share/vm/opto/reg_split.cpp

rev 5347 : 8013830: [parfait] Uninitialised pointer 'Reachblock' may be used as argument
Summary: Replace uninitialised pointer with NULL at argument.
Reviewed-by:

*** 373,382 ****
--- 373,383 ----
            lidx = _lrg_map.find_id(in);
          }
        }
  
        if (lidx < _lrg_map.max_lrg_id() && lrgs(lidx).reg() >= LRG::SPILL_REG) {
+         assert(Reachblock != NULL, "Reachblock must be non-NULL");
          Node *rdef = Reachblock[lrg2reach[lidx]];
          if (rdef) {
            spill->set_req(i, rdef);
          }
        }
*** 1334,1344 ****
          while (insert >= 1 &&
                 pred->get_node(insert - 1)->is_SpillCopy() &&
                 _lrg_map.find(pred->get_node(insert - 1)) >= lrgs_before_phi_split) {
            insert--;
          }
!         def = split_Rematerialize(def, pred, insert, maxlrg, splits, slidx, lrg2reach, Reachblock, false);
          if (!def) {
            return 0;    // Bail out
          }
        }
        // Update the Phi's input edge array
--- 1335,1346 ----
          while (insert >= 1 &&
                 pred->get_node(insert - 1)->is_SpillCopy() &&
                 _lrg_map.find(pred->get_node(insert - 1)) >= lrgs_before_phi_split) {
            insert--;
          }
!         // since the def cannot contain any live range input, we can pass in NULL as Reachlock parameter
!         def = split_Rematerialize(def, pred, insert, maxlrg, splits, slidx, lrg2reach, NULL, false);
          if (!def) {
            return 0;    // Bail out
          }
        }
        // Update the Phi's input edge array