if-to-switch: fix memory leak in case merging

gcc/ChangeLog:

	PR tree-optimization/99002
	PR tree-optimization/99026
	* gimple-if-to-switch.cc (if_chain::is_beneficial): Fix memory
	leak when adjacent cases are merged.
	* tree-switch-conversion.c (switch_decision_tree::analyze_switch_statement): Use
	release_clusters.
	(make_pass_lower_switch): Remove trailing whitespace.
	* tree-switch-conversion.h (release_clusters): New.

1 files changed, 9 insertions, 8 deletions

diff --git a/gcc/gimple-if-to-switch.cc b/gcc/gimple-if-to-switch.cc
index f39662b..16fabef 100644
--- a/gcc/gimple-if-to-switch.cc
+++ b/gcc/gimple-if-to-switch.cc
@@ -227,6 +227,7 @@ if_chain::is_beneficial ()
 			(left->get_high ()), wi::one (TYPE_PRECISION (type))))
 	    {
 	      left->set_high (right->get_high ());
+	      delete right;
 	      continue;
 	    }
 	}
@@ -241,20 +242,20 @@ if_chain::is_beneficial ()
     = jump_table_cluster::find_jump_tables (filtered_clusters);
   bool r = output.length () < filtered_clusters.length ();
   if (r)
-    dump_clusters (&output, "JT can be built");
-  output.release ();
-  if (r)
-    return true;
+    {
+      dump_clusters (&output, "JT can be built");
+      release_clusters (output);
+      return true;
+    }
+  else
+    output.release ();
 
   output = bit_test_cluster::find_bit_tests (filtered_clusters);
   r = output.length () < filtered_clusters.length ();
   if (r)
     dump_clusters (&output, "BT can be built");
 
-  for (unsigned i = 0; i < output.length (); i++)
-    delete output[i];
-
-  output.release ();
+  release_clusters (output);
   return r;
 }