[PATCH] Dump def that we use for a splat

[Richard Biener via Gcc-patches]

This makes the SLP vectorizer dump the def we use for a splat to
aid debugging.

Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.

2022-02-22  Richard Biener  <rguent...@suse.de>

        * tree-vect-slp.cc (vect_build_slp_tree_2): Dump the def used
        for a splat.
---
 gcc/tree-vect-slp.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index 9188d727e33..341bd5220a5 100644
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -2202,7 +2202,8 @@ out:
            {
              if (dump_enabled_p ())
                dump_printf_loc (MSG_NOTE, vect_location,
-                                "Using a splat of the uniform operand\n");
+                                "Using a splat of the uniform operand %G",
+                                first_def->stmt);
              oprnd_info->first_dt = vect_external_def;
            }
        }
-- 
2.34.1