https://gcc.gnu.org/g:fab1cd65070d9374cda161a881c4f2f9be38ee8a
commit r16-2504-gfab1cd65070d9374cda161a881c4f2f9be38ee8a
Author: Richard Biener <rguent...@suse.de>
Date: Fri Jul 25 09:04:49 2025 +0200
Remove dead code from vectorizable_store
There's dead code in the else block of a if (!costing_p) block,
after trivial pruning only setting of 'op' remains but that has
no further uses downstream. I found this looking for remaining
(must-be-dead) uses of vect_get_vec_defs_for_operand.
* tree-vect-stmts.cc (vectorizable_store): Remove trivially
dead code.
Diff:
---
gcc/tree-vect-stmts.cc | 33 ---------------------------------
1 file changed, 33 deletions(-)
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 26a0850a19d8..26cd19c50f74 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -9069,39 +9069,6 @@ vectorizable_store (vec_info *vinfo,
if (mask)
vec_mask = vec_masks[0];
}
- else
- {
- /* For interleaved stores we collect vectorized defs for all the
- stores in the group in DR_CHAIN. DR_CHAIN is then used as an
- input to vect_permute_store_chain().
-
- If the store is not grouped, DR_GROUP_SIZE is 1, and DR_CHAIN
- is of size 1. */
- stmt_vec_info next_stmt_info = first_stmt_info;
- for (i = 0; i < group_size; i++)
- {
- /* Since gaps are not supported for interleaved stores,
- DR_GROUP_SIZE is the exact number of stmts in the chain.
- Therefore, NEXT_STMT_INFO can't be NULL_TREE. In case
- that there is no interleaving, DR_GROUP_SIZE is 1,
- and only one iteration of the loop will be executed. */
- op = vect_get_store_rhs (next_stmt_info);
- if (!costing_p)
- {
- vect_get_vec_defs_for_operand (vinfo, next_stmt_info,
- 1, op, gvec_oprnds[i]);
- vec_oprnd = (*gvec_oprnds[i])[0];
- dr_chain.quick_push (vec_oprnd);
- }
- next_stmt_info = DR_GROUP_NEXT_ELEMENT (next_stmt_info);
- }
- if (mask && !costing_p)
- {
- vect_get_vec_defs_for_operand (vinfo, stmt_info, 1,
- mask, &vec_masks, mask_vectype);
- vec_mask = vec_masks[0];
- }
- }
/* We should have catched mismatched types earlier. */
gcc_assert (costing_p
