[gcc r13-1603] tree-optimization/106228 - fixup last change

[gcc r13-1603] tree-optimization/106228 - fixup last change

[Richard Biener]

https://gcc.gnu.org/g:415d2c38edadf97950eb14b8d7e6b1491c98cdd5

commit r13-1603-g415d2c38edadf97950eb14b8d7e6b1491c98cdd5
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Jul 11 12:07:05 2022 +0200

    tree-optimization/106228 - fixup last change
    
    The following fixes the last commit to honor the case we are not
    vectorizing a loop.
    
            PR tree-optimization/106228
            * tree-vect-data-refs.cc (vect_setup_realignment): Adjust
            VUSE compute for the non-loop case.

Diff:
---
 gcc/tree-vect-data-refs.cc | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index 53e52cb58cb..609cacc4971 100644
--- a/gcc/tree-vect-data-refs.cc
+++ b/gcc/tree-vect-data-refs.cc
@@ -5777,14 +5777,14 @@ vect_setup_realignment (vec_info *vinfo, stmt_vec_info stmt_info,
   if (at_loop)
     *at_loop = loop_for_initial_load;
 
+  tree vuse = NULL_TREE;
   if (loop_for_initial_load)
-    pe = loop_preheader_edge (loop_for_initial_load);
-
-  tree vuse;
-  gphi *vphi = get_virtual_phi (loop_for_initial_load->header);
-  if (vphi)
-    vuse = PHI_ARG_DEF_FROM_EDGE (vphi, pe);
-  else
+    {
+      pe = loop_preheader_edge (loop_for_initial_load);
+      if (gphi *vphi = get_virtual_phi (loop_for_initial_load->header))
+	vuse = PHI_ARG_DEF_FROM_EDGE (vphi, pe);
+    }
+  if (!vuse)
     vuse = gimple_vuse (gsi_stmt (*gsi));
 
   /* 3. For the case of the optimized realignment, create the first vector