[gcc r12-5328] Fix clearing of to_info_lto in ipa_merge_modref_summary_after_inlining

[gcc r12-5328] Fix clearing of to_info_lto in ipa_merge_modref_summary_after_inlining

[Jan Hubicka]

https://gcc.gnu.org/g:8c693978dd64b16637577ebf50c760053d7d2165

commit r12-5328-g8c693978dd64b16637577ebf50c760053d7d2165
Author: Jan Hubicka <jh@suse.cz>
Date:   Wed Nov 17 01:43:57 2021 +0100

    Fix clearing of to_info_lto in ipa_merge_modref_summary_after_inlining
    
    This patch fixes bug that caused some optimizations to be dropped with
    -fdump-ipa-inline.
    
    gcc/ChangeLog:
    
    2021-11-17  Jan Hubicka  <hubicka@ucw.cz>
    
            PR ipa/103246
            * ipa-modref.c (ipa_merge_modref_summary_after_inlining): Fix clearing
            of to_info_lto

Diff:
---
 gcc/ipa-modref.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/ipa-modref.c b/gcc/ipa-modref.c
index a70575bc807..90cd1be764c 100644
--- a/gcc/ipa-modref.c
+++ b/gcc/ipa-modref.c
@@ -5123,6 +5123,7 @@ ipa_merge_modref_summary_after_inlining (cgraph_edge *edge)
 	    fprintf (dump_file, "Removed mod-ref summary for %s\n",
 		     to->dump_name ());
 	  summaries_lto->remove (to);
+	  to_info_lto = NULL;
 	}
       else if (to_info_lto && dump_file)
 	{
@@ -5130,7 +5131,6 @@ ipa_merge_modref_summary_after_inlining (cgraph_edge *edge)
 	    fprintf (dump_file, "Updated mod-ref summary for %s\n",
 		     to->dump_name ());
 	  to_info_lto->dump (dump_file);
-	  to_info_lto = NULL;
 	}
       if (callee_info_lto)
 	summaries_lto->remove (edge->callee);