[tree-ssa-loop] Remove redundant check for number of loops in pass_vectorize::execute

[Prathamesh Kulkarni via Gcc-patches]

Hi,
The attached patch removes redundant check for number of loops in
pass_vectorize::execute,
since it only calls vectorize_loops, and in vectorize_loops, we
immediately bail out if no loops are present:
  vect_loops_num = number_of_loops (cfun);
  /* Bail out if there are no loops.  */
  if (vect_loops_num <= 1)
    return 0;

Is the patch OK to commit ?

Thanks,
Prathamesh

diff --git a/gcc/tree-ssa-loop.c b/gcc/tree-ssa-loop.c
index 1bbf2f1fb2c..d10e2dc0d54 100644
--- a/gcc/tree-ssa-loop.c
+++ b/gcc/tree-ssa-loop.c
@@ -407,9 +407,6 @@ public:
 unsigned int
 pass_vectorize::execute (function *fun)
 {
-  if (number_of_loops (fun) <= 1)
-    return 0;
-
   return vectorize_loops ();
 }