ART-tests: Remove DX dependency from 661-checker-simd-reduc

In a few test cases D8 generated code makes ART swap 2 similar PHI
instructions. This CL updates the check conditions for D8 and enables
it.

Test: art/test.py -r -b --host -t 661-checker-simd-reduc
Bug: 65168732
Change-Id: I0cde3ab21b33bde48da3209df206739ad9d99e89
diff --git a/test/661-checker-simd-reduc/build b/test/661-checker-simd-reduc/build
deleted file mode 100644
index d85147f..0000000
--- a/test/661-checker-simd-reduc/build
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2018 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# See b/65168732
-export USE_D8=false
-
-./default-build "$@"
diff --git a/test/661-checker-simd-reduc/src/Main.java b/test/661-checker-simd-reduc/src/Main.java
index eff2018..7b6f957 100644
--- a/test/661-checker-simd-reduc/src/Main.java
+++ b/test/661-checker-simd-reduc/src/Main.java
@@ -55,8 +55,8 @@
   /// CHECK-START: int Main.reductionInt(int[]) loop_optimization (before)
   /// CHECK-DAG: <<Cons0:i\d+>>  IntConstant 0                 loop:none
   /// CHECK-DAG: <<Cons1:i\d+>>  IntConstant 1                 loop:none
-  /// CHECK-DAG: <<Phi1:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: <<Phi2:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: <<Phi2:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop:B\d+>> outer_loop:none
+  /// CHECK-DAG: <<Phi1:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [{{l\d+}},<<Phi1>>]  loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG:                 Add [<<Phi2>>,<<Get>>]        loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG:                 Add [<<Phi1>>,<<Cons1>>]      loop:<<Loop>>      outer_loop:none
@@ -130,8 +130,8 @@
   /// CHECK-START: int Main.reductionIntToLoop(int[]) loop_optimization (before)
   /// CHECK-DAG: <<Cons0:i\d+>>  IntConstant 0                 loop:none
   /// CHECK-DAG: <<Cons1:i\d+>>  IntConstant 1                 loop:none
-  /// CHECK-DAG: <<Phi1:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop1:B\d+>> outer_loop:none
-  /// CHECK-DAG: <<Phi2:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop1>>      outer_loop:none
+  /// CHECK-DAG: <<Phi2:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop1:B\d+>> outer_loop:none
+  /// CHECK-DAG: <<Phi1:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop1>>      outer_loop:none
   /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [{{l\d+}},<<Phi1>>]  loop:<<Loop1>>      outer_loop:none
   /// CHECK-DAG:                 Add [<<Phi2>>,<<Get>>]        loop:<<Loop1>>      outer_loop:none
   /// CHECK-DAG:                 Add [<<Phi1>>,<<Cons1>>]      loop:<<Loop1>>      outer_loop:none
@@ -295,8 +295,8 @@
   /// CHECK-START: int Main.reductionMinusInt(int[]) loop_optimization (before)
   /// CHECK-DAG: <<Cons0:i\d+>>  IntConstant 0                 loop:none
   /// CHECK-DAG: <<Cons1:i\d+>>  IntConstant 1                 loop:none
-  /// CHECK-DAG: <<Phi1:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop:B\d+>> outer_loop:none
-  /// CHECK-DAG: <<Phi2:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop>>      outer_loop:none
+  /// CHECK-DAG: <<Phi2:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop:B\d+>> outer_loop:none
+  /// CHECK-DAG: <<Phi1:i\d+>>   Phi [<<Cons0>>,{{i\d+}}]      loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG: <<Get:i\d+>>    ArrayGet [{{l\d+}},<<Phi1>>]  loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG:                 Sub [<<Phi2>>,<<Get>>]        loop:<<Loop>>      outer_loop:none
   /// CHECK-DAG:                 Add [<<Phi1>>,<<Cons1>>]      loop:<<Loop>>      outer_loop:none