In vectorizable_reduction, one check on a reduction operand via index could be
contained by another one check via pointer, so remove the former.

Thanks,
Feng

---
gcc/
	* tree-vect-loop.cc (vectorizable_reduction): Remove the duplicated
	check.
---
 gcc/tree-vect-loop.cc | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index d9a2ad69484..6e8b3639daf 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -7815,11 +7815,9 @@ vectorizable_reduction (loop_vec_info loop_vinfo,
 			     "use not simple.\n");
 	  return false;
 	}
-      if (i == STMT_VINFO_REDUC_IDX (stmt_info))
-	continue;
 
-      /* For an IFN_COND_OP we might hit the reduction definition operand
-	 twice (once as definition, once as else).  */
+      /* Skip reduction operands, and for an IFN_COND_OP we might hit the
+	 reduction operand twice (once as definition, once as else).  */
       if (op.ops[i] == op.ops[STMT_VINFO_REDUC_IDX (stmt_info)])
 	continue;
 
-- 
2.17.1