[gcc r16-3513] Avoid touching STMT_VINFO_VECTYPE in bump_vector_ptr

[Richard Biener]

https://gcc.gnu.org/g:0b6f1de05e2b1e25ac4cf8659bc3c4b5b3bac734

commit r16-3513-g0b6f1de05e2b1e25ac4cf8659bc3c4b5b3bac734
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Sep 1 15:45:57 2025 +0200

    Avoid touching STMT_VINFO_VECTYPE in bump_vector_ptr
    
    bump is always specified, so remove the STMT_VINFO_VECTYPE touching
    path.
    
            * tree-vect-data-refs.cc (bump_vector_ptr): Remove the
            STMT_VINFO_VECTYPE use, bump is always specified.

Diff:
---
 gcc/tree-vect-data-refs.cc | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index 1395776599a2..e451b72e07ea 100644
--- a/gcc/tree-vect-data-refs.cc
+++ b/gcc/tree-vect-data-refs.cc
@@ -5797,8 +5797,7 @@ vect_create_data_ref_ptr (vec_info *vinfo, stmt_vec_info stmt_info,
 	      to be vector_size.
    BSI - location where the new update stmt is to be placed.
    STMT_INFO - the original scalar memory-access stmt that is being vectorized.
-   BUMP - optional. The offset by which to bump the pointer. If not given,
-	  the offset is assumed to be vector_size.
+   UPDATE - The offset by which to bump the pointer.
 
    Output: Return NEW_DATAREF_PTR as illustrated above.
 
@@ -5807,19 +5806,14 @@ vect_create_data_ref_ptr (vec_info *vinfo, stmt_vec_info stmt_info,
 tree
 bump_vector_ptr (vec_info *vinfo,
 		 tree dataref_ptr, gimple *ptr_incr, gimple_stmt_iterator *gsi,
-		 stmt_vec_info stmt_info, tree bump)
+		 stmt_vec_info stmt_info, tree update)
 {
   struct data_reference *dr = STMT_VINFO_DATA_REF (stmt_info);
-  tree vectype = STMT_VINFO_VECTYPE (stmt_info);
-  tree update = TYPE_SIZE_UNIT (vectype);
   gimple *incr_stmt;
   ssa_op_iter iter;
   use_operand_p use_p;
   tree new_dataref_ptr;
 
-  if (bump)
-    update = bump;
-
   if (TREE_CODE (dataref_ptr) == SSA_NAME)
     new_dataref_ptr = copy_ssa_name (dataref_ptr);
   else if (is_gimple_min_invariant (dataref_ptr))