truffle: src/share/vm/opto/cfgnode.cpp comparison

7004535: Clone loop predicate during loop unswitch Summary: Clone loop predicate for clonned loops Reviewed-by: never

comparison

equal deleted inserted replaced

-:07acc51c1d2a
+:08eb13460b3a
 //------------------------------split_once-------------------------------------
 // Helper for split_flow_path
 static void split_once(PhaseIterGVN *igvn, Node *phi, Node *val, Node *n, Node *newn) {
 igvn->hash_delete(n);         // Remove from hash before hacking edges
+Node* predicate_proj = NULL;
 uint j = 1;
-for( uint i = phi->req()-1; i > 0; i-- ) {
+for (uint i = phi->req()-1; i > 0; i--) {
-if( phi->in(i) == val ) {   // Found a path with val?
+if (phi->in(i) == val) {   // Found a path with val?
+if (n->is_Region()) {
+Node* proj = PhaseIdealLoop::find_predicate(n->in(i));
+if (proj != NULL) {
+assert(predicate_proj == NULL, "only one predicate entry expected");
+predicate_proj = proj;
+}
+}
 // Add to NEW Region/Phi, no DU info
 newn->set_req( j++, n->in(i) );
 // Remove from OLD Region/Phi
 n->del_req(i);
 }
 }
 // Register the new node but do not transform it.  Cannot transform until the
 // entire Region/Phi conglomerate has been hacked as a single huge transform.
 igvn->register_new_node_with_optimizer( newn );
+// Clone loop predicates
+if (predicate_proj != NULL) {
+newn = igvn->clone_loop_predicates(predicate_proj, newn);
+}
 // Now I can point to the new node.
 n->add_req(newn);
 igvn->_worklist.push(n);
 }

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