src/hotspot/share/opto/node.cpp

*** 1226,1241 ****
      up = sub->find_exact_control(up);
      // If sub == up, we found a self-loop.  Try to push past it.
      if (sub == up && sub->is_Loop()) {
        // Take loop entry path on the way up to 'dom'.
        up = sub->in(1); // in(LoopNode::EntryControl);
!     } else if (sub == up && sub->is_Region() && sub->req() != 3) {
!       // Always take in(1) path on the way up to 'dom' for clone regions
!       // (with only one input) or regions which merge > 2 paths
!       // (usually used to merge fast/slow paths).
        up = sub->in(1);
!     } else if (sub == up && sub->is_Region()) {
        // Try both paths for Regions with 2 input paths (it may be a loop head).
        // It could give conservative 'false' answer without information
        // which region's input is the entry path.
        iterations_without_region_limit = DominatorSearchLimit; // Reset
  
--- 1226,1239 ----
      up = sub->find_exact_control(up);
      // If sub == up, we found a self-loop.  Try to push past it.
      if (sub == up && sub->is_Loop()) {
        // Take loop entry path on the way up to 'dom'.
        up = sub->in(1); // in(LoopNode::EntryControl);
!     } else if (sub == up && sub->is_Region() && sub->req() == 2) {
!       // Take in(1) path on the way up to 'dom' for regions with only one input
        up = sub->in(1);
!     } else if (sub == up && sub->is_Region() && sub->req() == 3) {
        // Try both paths for Regions with 2 input paths (it may be a loop head).
        // It could give conservative 'false' answer without information
        // which region's input is the entry path.
        iterations_without_region_limit = DominatorSearchLimit; // Reset