[PATCH] tree-optimization/111136 - STMT_VINFO_SLP_VECT_ONLY and stores

[PATCH] tree-optimization/111136 - STMT_VINFO_SLP_VECT_ONLY and stores

[Richard Biener]

vect_dissolve_slp_only_groups currently only expects loads, for stores
we have to make sure to mark the dissolved "groups" strided.

Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.

	PR tree-optimization/111136
	* tree-vect-loop.cc (vect_dissolve_slp_only_groups): For
	stores force STMT_VINFO_STRIDED_P and also duplicate that
	to all elements.
---
 gcc/tree-vect-loop.cc | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index ebee8037e02..23c6e8259e7 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -2453,8 +2453,13 @@ vect_dissolve_slp_only_groups (loop_vec_info loop_vinfo)
 		  DR_GROUP_FIRST_ELEMENT (vinfo) = vinfo;
 		  DR_GROUP_NEXT_ELEMENT (vinfo) = NULL;
 		  DR_GROUP_SIZE (vinfo) = 1;
-		  if (STMT_VINFO_STRIDED_P (first_element))
-		    DR_GROUP_GAP (vinfo) = 0;
+		  if (STMT_VINFO_STRIDED_P (first_element)
+		      /* We cannot handle stores with gaps.  */
+		      || DR_IS_WRITE (dr_info->dr))
+		    {
+		      STMT_VINFO_STRIDED_P (vinfo) = true;
+		      DR_GROUP_GAP (vinfo) = 0;
+		    }
 		  else
 		    DR_GROUP_GAP (vinfo) = group_size - 1;
 		  /* Duplicate and adjust alignment info, it needs to
-- 
2.35.3