[4/9] rs6000 changes to vec_perm_const hook.

[Prathamesh Kulkarni via Gcc-patches]

Hi,
The attached patch adjusts vec_perm_const hook to accommodate the new parameter.
For rationale, please see:
https://gcc.gnu.org/pipermail/gcc-patches/2022-May/595128.html
OK to commit if bootstrap+test passes ?

Thanks,
Prathamesh

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index d4defc855d0..8c87101692a 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -23294,9 +23294,12 @@ rs6000_expand_vec_perm_const_1 (rtx target, rtx op0, 
rtx op1,
 /* Implement TARGET_VECTORIZE_VEC_PERM_CONST.  */
 
 static bool
-rs6000_vectorize_vec_perm_const (machine_mode vmode, rtx target, rtx op0,
-                                rtx op1, const vec_perm_indices &sel)
+rs6000_vectorize_vec_perm_const (machine_mode vmode, rtx op_mode, rtx target,
+                                rtx op0, rtx op1, const vec_perm_indices &sel)
 {
+  if (vmode != op_mode)
+    return false;
+
   bool testing_p = !target;
 
   /* AltiVec (and thus VSX) can handle arbitrary permutations.  */