[PATCH] Make sure to simplify CFG after OMP SIMD vectorization

[Richard Biener]

I noticed we keep the VF != 0 check in the CFG for quite some passes
when looking at PR80844 so the following fixes that.

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

Richard.

2017-05-26  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/80844
        * tree-vectorizer.c (adjust_simduid_builtins): Propagate
        results.

Index: gcc/tree-vectorizer.c
===================================================================
--- gcc/tree-vectorizer.c       (revision 248409)
+++ gcc/tree-vectorizer.c       (working copy)
@@ -229,8 +229,11 @@ adjust_simduid_builtins (hash_table<simd
            default:
              gcc_unreachable ();
            }
-         update_call_from_tree (&i, t);
-         gsi_next (&i);
+         tree lhs = gimple_call_lhs (stmt);
+         if (lhs)
+           replace_uses_by (lhs, t);
+         release_defs (stmt);
+         gsi_remove (&i, true);
        }
     }
 }