[Bug ipa/97346] IPA reference reference_vars_to_consider leaks

["rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97346

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
So like the following?  Note the leak is the allcoation from ipa_init
being not released when we do the vec_alloc in
ipa_reference_write_optimization_summary (maybe this function wants to
use its own private vector?!)

diff --git a/gcc/ipa-reference.c b/gcc/ipa-reference.c
index 2ea2a6d5327..328fa8f732c 100644
--- a/gcc/ipa-reference.c
+++ b/gcc/ipa-reference.c
@@ -966,8 +966,7 @@ propagate (void)
       ipa_ref_var_info_summaries = NULL;
     }

-  if (dump_file)
-    vec_free (reference_vars_to_consider);
+  vec_free (reference_vars_to_consider);
   reference_vars_to_consider = NULL;
   return remove_p ? TODO_remove_functions : 0;
 }
@@ -1059,7 +1058,7 @@ ipa_reference_write_optimization_summary (void)
   auto_bitmap ltrans_statics;
   int i;

-  vec_alloc (reference_vars_to_consider, ipa_reference_vars_uids);
+  vec_truncate (reference_vars_to_consider, 0);
   reference_vars_to_consider->safe_grow (ipa_reference_vars_uids, true);

   /* See what variables we are interested in.  */
@@ -1117,7 +1116,8 @@ ipa_reference_write_optimization_summary (void)
          }
       }
   lto_destroy_simple_output_block (ob);
-  delete reference_vars_to_consider;
+  vec_free (reference_vars_to_consider);
+  reference_vars_to_consider = NULL;
 }

 /* Deserialize the ipa info for lto.  */