From: Richard Biener <rguenther@suse.de>
Date: Thu, 5 Feb 2026 11:26:18 +0000 (+0100)
Subject: tree-optimization/123986 - upon SLP analysis rollback, release data
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12e97ffdb516bae81b823a247250dc2d7ce8e566;p=thirdparty%2Fgcc.git

tree-optimization/123986 - upon SLP analysis rollback, release data

The following makes sure to release any SLP kind specific data when
rolling back earlier successful analysis.  This avoids crashing
when re-analyzing such node via another graph entry.

	PR tree-optimization/123986
	* tree-vect-slp.cc (vect_slp_analyze_operations): When
	rolling back analyzed nodes, release node specific data
	and reset SLP_TREE_TYPE.
---

diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index c481efc749f..c932e8d5cba 100644
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -9258,10 +9258,19 @@ vect_slp_analyze_operations (vec_info *vinfo)
 	    dump_printf_loc (MSG_NOTE, vect_location,
 			     "removing SLP instance operations starting from: %G",
 			     stmt_info->stmt);
+	  while (!visited_vec.is_empty ())
+	    {
+	      slp_tree node = visited_vec.pop ();
+	      SLP_TREE_TYPE (node) = undef_vec_info_type;
+	      if (node->data)
+		{
+		  delete node->data;
+		  node->data = nullptr;
+		}
+	      visited.remove (node);
+	    }
 	  vect_free_slp_instance (instance);
           vinfo->slp_instances.ordered_remove (i);
-	  while (!visited_vec.is_empty ())
-	    visited.remove (visited_vec.pop ());
 	}
       else
 	{