From: Richard Biener <rguenther@suse.de>
Date: Thu, 31 Oct 2024 10:51:16 +0000 (+0100)
Subject: Preserve ->move_dr behavior when adjusting epilogue info
X-Git-Tag: basepoints/gcc-16~4672
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=223da6ac40cdd425ae16b787e2ca758ea665b75f;p=thirdparty%2Fgcc.git

Preserve ->move_dr behavior when adjusting epilogue info

When update_epilogue_loop_vinfo relates the shared loop DRs with
the epilogue stmts and infos it should not fiddle with how
pattern recognition applied move_dr.

	* tree-vect-loop.cc (update_epilogue_loop_vinfo): A DRs
	main stmt vinfo dr_aux should refer to a pattern stmt
	which is how move_dr sets this up.  We shouldn't undo this.
---

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 7ed3a56bc680..dd18ec9ff175 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -12291,7 +12291,6 @@ update_epilogue_loop_vinfo (class loop *epilogue, tree advance)
 				     &find_in_mapping, &mapping);
 	}
       DR_STMT (dr) = STMT_VINFO_STMT (stmt_vinfo);
-      stmt_vinfo->dr_aux.stmt = stmt_vinfo;
     }
 
   epilogue_vinfo->shared->datarefs_copy.release ();