src/hotspot/share/gc/z/c2/zBarrierSetC2.cpp

rev 56032 : 8229970: ZGC: C2: fixup_uses_in_catch may fail when exanding many uses
Reviewed-by:

*** 988,1007 ****
    }
  
    // Process the loads successor nodes - if any is between
    // the call and the catch blocks, they need to be cloned to.
    // This is done recursively
!   int outcnt = load->outcnt();
!   uint index = 0;
!   for (int i = 0; i < outcnt; i++) {
!     if (index < load->outcnt()) {
!       Node *n = load->raw_out(index);
        assert(!n->is_LoadBarrier(), "Sanity");
        if (!fixup_uses_in_catch(phase, ctrl, n)) {
          // if no successor was cloned, progress to next out.
!         index++;
!       }
      }
    }
  
    // Now all the loads uses has been cloned down
    // Only thing left is to clone the loads, but they must end up
--- 988,1003 ----
    }
  
    // Process the loads successor nodes - if any is between
    // the call and the catch blocks, they need to be cloned to.
    // This is done recursively
!   for (uint i = 0; i < load->outcnt();) {
!     Node *n = load->raw_out(i);
      assert(!n->is_LoadBarrier(), "Sanity");
      if (!fixup_uses_in_catch(phase, ctrl, n)) {
        // if no successor was cloned, progress to next out.
!       i++;
      }
    }
  
    // Now all the loads uses has been cloned down
    // Only thing left is to clone the loads, but they must end up