src/hotspot/share/opto/loopnode.cpp

rev 49816 : 8201532: Update idom to get correct dom depth calculation
Summary: Assert due to dom depth calculation on old idom
Reviewed-by:

@@ -3216,14 +3216,20 @@
 // the dom tree from each node marked "no depth yet", and computes
 // the depth on the way back down.
 void PhaseIdealLoop::recompute_dom_depth() {
   uint no_depth_marker = C->unique();
   uint i;
-  // Initialize depth to "no depth yet"
+  // Initialize depth to "no depth yet" and realize all lazy updates
   for (i = 0; i < _idom_size; i++) {
+    // Only indices with a _dom_depth has a Node* or NULL (otherwise uninitalized).
     if (_dom_depth[i] > 0 && _idom[i] != NULL) {
      _dom_depth[i] = no_depth_marker;
+
+      // heal _idom if it has a fwd mapping in _nodes
+      if (_idom[i]->in(0) == NULL) {
+        idom(i);
+      }
     }
   }
   if (_dom_stk == NULL) {
     uint init_size = C->live_nodes() / 100; // Guess that 1/100 is a reasonable initial size.
     if (init_size < 10) init_size = 10;