[PATCH] Fix SLP reduction initial value for pointer reductions

[Richard Biener]

For pointer reductions we need to convert the initial value to
the vector component integer type.

Re-bootstrap and regtest running on x86_64-unknown-linux-gnu.

I've ran into this latent bug on the force-slp branch.

Richard.

        * tree-vect-loop.cc (get_initial_defs_for_reduction): Convert
        initial value to the vector component type.
---
 gcc/tree-vect-loop.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 29c03c246d4..704df7bdcc7 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -5618,7 +5618,14 @@ get_initial_defs_for_reduction (loop_vec_info loop_vinfo,
       if (i >= initial_values.length () || (j > i && neutral_op))
        op = neutral_op;
       else
-       op = initial_values[i];
+       {
+         if (!useless_type_conversion_p (TREE_TYPE (vector_type),
+                                         TREE_TYPE (initial_values[i])))
+           initial_values[i] = gimple_convert (&ctor_seq,
+                                               TREE_TYPE (vector_type),
+                                               initial_values[i]);
+         op = initial_values[i];
+       }
 
       /* Create 'vect_ = {op0,op1,...,opn}'.  */
       number_of_places_left_in_vector--;
-- 
2.35.3