From: Richard Biener <rguenther@suse.de>
Date: Wed, 30 Jul 2025 13:38:03 +0000 (+0200)
Subject: Enable gather/scatter for epilogues of vector epilogues
X-Git-Tag: basepoints/gcc-17~5509
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1bf102afed70d88d757d6f7b3014523e66ab42ff;p=thirdparty%2Fgcc.git

Enable gather/scatter for epilogues of vector epilogues

The restriction no longer applies, so remove it.

	* tree-vect-data-refs.cc (vect_check_gather_scatter):
	Remove restriction on epilogue of epilogue vectorization.
---

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index 4cfd1a301c2..f9bf6a21697 100644
--- a/gcc/tree-vect-data-refs.cc
+++ b/gcc/tree-vect-data-refs.cc
@@ -4597,13 +4597,6 @@ vect_check_gather_scatter (stmt_vec_info stmt_info, loop_vec_info loop_vinfo,
       masked_p = (ifn == IFN_MASK_LOAD || ifn == IFN_MASK_STORE);
     }
 
-  /* ???  For epilogues we adjust DR_REF to make the following stmt-based
-     analysis work, but this adjustment doesn't work for epilogues of
-     epilogues during transform, so disable gather/scatter in that case.  */
-  if (LOOP_VINFO_EPILOGUE_P (loop_vinfo)
-      && LOOP_VINFO_EPILOGUE_P (LOOP_VINFO_ORIG_LOOP_INFO (loop_vinfo)))
-    return false;
-
   /* True if we should aim to use internal functions rather than
      built-in functions.  */
   bool use_ifn_p = (DR_IS_READ (dr)