https://gcc.gnu.org/g:2b99395c312883ccf114476347a7f5174fde436d
commit r16-2169-g2b99395c312883ccf114476347a7f5174fde436d
Author: Richard Biener <rguent...@suse.de>
Date: Thu Jul 10 11:23:59 2025 +0200
Adjust reduction with conversion SLP build
The following adjusts how we set SLP_TREE_VECTYPE for the conversion
node we build when fixing up the reduction with conversion SLP instance.
This should probably see more TLC, but the following avoids relying
on STMT_VINFO_VECTYPE for this.
* tree-vect-slp.cc (vect_build_slp_instance): Do not use
SLP_TREE_VECTYPE to determine the conversion back to the
reduction IV.
Diff:
---
gcc/tree-vect-slp.cc | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index 68ef1ddda77a..5ef45fd60f57 100644
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -4067,7 +4067,12 @@ vect_build_slp_instance (vec_info *vinfo,
for (unsigned i = 0; i < group_size; ++i)
scalar_stmts.quick_push (next_info);
slp_tree conv = vect_create_new_slp_node (scalar_stmts, 1);
- SLP_TREE_VECTYPE (conv) = STMT_VINFO_VECTYPE (next_info);
+ SLP_TREE_VECTYPE (conv)
+ = get_vectype_for_scalar_type (vinfo,
+ TREE_TYPE
+ (gimple_assign_lhs
+ (scalar_def)),
+ group_size);
SLP_TREE_CHILDREN (conv).quick_push (node);
SLP_INSTANCE_TREE (new_instance) = conv;
/* We also have to fake this conversion stmt as SLP reduction
