From: Richard Biener <rguenther@suse.de>
Date: Tue, 11 Jul 2023 08:40:19 +0000 (+0200)
Subject: tree-optimization/110614 - SLP splat and re-align (optimized)
X-Git-Tag: basepoints/gcc-15~7709
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4736ddd11874fe215662ac18877ce8eded1f5976;p=thirdparty%2Fgcc.git

tree-optimization/110614 - SLP splat and re-align (optimized)

The following properly guards the re-align (optimized) paths used
on old power CPUs for the added case of SLP splats from non-grouped
loads.  Testcases are existing in dg-torture.

	PR tree-optimization/110614
	* tree-vect-data-refs.cc (vect_supportable_dr_alignment):
	SLP splats are not suitable for re-align ops.
---

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index ab2af103cb4a..9edc8989de95 100644
--- a/gcc/tree-vect-data-refs.cc
+++ b/gcc/tree-vect-data-refs.cc
@@ -6829,10 +6829,11 @@ vect_supportable_dr_alignment (vec_info *vinfo, dr_vec_info *dr_info,
 	     same alignment, instead it depends on the SLP group size.  */
 	  if (loop_vinfo
 	      && STMT_SLP_TYPE (stmt_info)
-	      && !multiple_p (LOOP_VINFO_VECT_FACTOR (loop_vinfo)
-			      * (DR_GROUP_SIZE
-				 (DR_GROUP_FIRST_ELEMENT (stmt_info))),
-			      TYPE_VECTOR_SUBPARTS (vectype)))
+	      && (!STMT_VINFO_GROUPED_ACCESS (stmt_info)
+		  || !multiple_p (LOOP_VINFO_VECT_FACTOR (loop_vinfo)
+				  * (DR_GROUP_SIZE
+				       (DR_GROUP_FIRST_ELEMENT (stmt_info))),
+				  TYPE_VECTOR_SUBPARTS (vectype))))
 	    ;
 	  else if (!loop_vinfo
 		   || (nested_in_vect_loop