src/share/vm/opto/compile.cpp

rev 8962 : sched pressure
rev 9360 : 8137168: Replace IfNode with a new RangeCheckNode for range checks
Summary: new RangeCheckNode to enable optimization of explicit library level range checks
Reviewed-by:

*** 3179,3198 ****
      // confuses register allocation.
      if (n->req() > MemBarNode::Precedent) {
        n->set_req(MemBarNode::Precedent, top());
      }
      break;
    default:
      assert( !n->is_Call(), "" );
      assert( !n->is_Mem(), "" );
      assert( nop != Op_ProfileBoolean, "should be eliminated during IGVN");
      break;
    }
  
    // Collect CFG split points
!   if (n->is_MultiBranch())
      frc._tests.push(n);
  }
  
  //------------------------------final_graph_reshaping_walk---------------------
  // Replacing Opaque nodes with their input in final_graph_reshaping_impl(),
  // requires that the walk visits a node's inputs before visiting the node.
--- 3179,3206 ----
      // confuses register allocation.
      if (n->req() > MemBarNode::Precedent) {
        n->set_req(MemBarNode::Precedent, top());
      }
      break;
+   case Op_RangeCheck: {
+     RangeCheckNode* rc = n->as_RangeCheck();
+     Node* iff = new IfNode(rc->in(0), rc->in(1), rc->_prob, rc->_fcnt);
+     n->subsume_by(iff, this);
+     frc._tests.push(iff);
+     break;
+   }
    default:
      assert( !n->is_Call(), "" );
      assert( !n->is_Mem(), "" );
      assert( nop != Op_ProfileBoolean, "should be eliminated during IGVN");
      break;
    }
  
    // Collect CFG split points
!   if (n->is_MultiBranch() && !n->is_RangeCheck()) {
      frc._tests.push(n);
+   }
  }
  
  //------------------------------final_graph_reshaping_walk---------------------
  // Replacing Opaque nodes with their input in final_graph_reshaping_impl(),
  // requires that the walk visits a node's inputs before visiting the node.