simplify-rtx.c (simplify_binary_operation_1): Handle the case where both…

simplify-rtx.c (simplify_binary_operation_1): Handle the case where both arguments are using gen_const_vec_series.

	* simplify-rtx.c (simplify_binary_operation_1) <case VEC_SERIES>:
	Handle the case where both arguments are using gen_const_vec_series.

From-SVN: r255079

gcc/ChangeLog

+2017-11-22  Jakub Jelinek  <jakub@redhat.com>
+
+	* simplify-rtx.c (simplify_binary_operation_1) <case VEC_SERIES>:
+	Handle the case where both arguments are using gen_const_vec_series.
+
 2017-11-22  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/62170

gcc/simplify-rtx.c

@@ -3566,6 +3566,8 @@ simplify_binary_operation_1 (enum rtx_code code, machine_mode mode,
     case VEC_SERIES:
       if (op1 == CONST0_RTX (GET_MODE_INNER (mode)))
 	return gen_vec_duplicate (mode, op0);
+      if (CONSTANT_P (op0) && CONSTANT_P (op1))
+	return gen_const_vec_series (mode, op0, op1);
       return 0;
 
     case VEC_SELECT:
@@ -6652,6 +6654,9 @@ test_vector_ops_series (machine_mode mode, rtx scalar_reg)
   ASSERT_RTX_EQ (series_r_1,
 		 simplify_binary_operation (MINUS, mode, duplicate,
 					    series_0_m1));
+  ASSERT_RTX_EQ (series_0_m1,
+		 simplify_binary_operation (VEC_SERIES, mode, const0_rtx,
+					    constm1_rtx));
 }
 
 /* Verify some simplifications involving vectors.  */