ART: Create BoundType for CheckCast early
ReferenceTypePropagation creates a BoundType for each CheckCast and
replaces all dominated uses of the casted object with it. This does
not include Phi uses on the boundary of the dominated scope, reducing
typing precision. This patch creates the BoundType in Builder, causing
SsaBuilder to replace uses of the object automatically.
Bug: 26081304
Change-Id: I083979155cccb348071ff58cb9060a896ed7d2ac
diff --git a/test/554-checker-rtp-checkcast/src/Main.java b/test/554-checker-rtp-checkcast/src/Main.java
new file mode 100644
index 0000000..607f71a
--- /dev/null
+++ b/test/554-checker-rtp-checkcast/src/Main.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+
+public class Main {
+
+ public static Object returnIntArray() { return new int[10]; }
+
+ /// CHECK-START: void Main.boundTypeForMergingPhi() ssa_builder (after)
+ /// CHECK-DAG: ArraySet [<<NC:l\d+>>,{{i\d+}},{{i\d+}}]
+ /// CHECK-DAG: <<NC>> NullCheck [<<Phi:l\d+>>]
+ /// CHECK-DAG: <<Phi>> Phi klass:int[]
+
+ public static void boundTypeForMergingPhi() {
+ int[] array = new int[20];
+ if (array.hashCode() > 5) {
+ array = (int[]) returnIntArray();
+ }
+ array[0] = 14;
+ }
+
+ /// CHECK-START: void Main.boundTypeForLoopPhi() ssa_builder (after)
+ /// CHECK-DAG: ArraySet [<<NC:l\d+>>,{{i\d+}},{{i\d+}}]
+ /// CHECK-DAG: <<NC>> NullCheck [<<Phi:l\d+>>]
+ /// CHECK-DAG: <<Phi>> Phi klass:int[]
+
+ public static void boundTypeForLoopPhi() {
+ int[] array = new int[20];
+ int i = 0;
+ while (i < 4) {
+ ++i;
+ array[i] = i;
+ if (i > 2) {
+ array = (int[]) returnIntArray();
+ }
+ }
+ array[0] = 14;
+ }
+
+ /// CHECK-START: void Main.boundTypeForCatchPhi() ssa_builder (after)
+ /// CHECK-DAG: ArraySet [<<NC:l\d+>>,{{i\d+}},{{i\d+}}]
+ /// CHECK-DAG: <<NC>> NullCheck [<<Phi:l\d+>>]
+ /// CHECK-DAG: <<Phi>> Phi is_catch_phi:true klass:int[]
+
+ public static void boundTypeForCatchPhi() {
+ int[] array1 = new int[20];
+ int[] array2 = (int[]) returnIntArray();
+
+ int[] catch_phi = array1;
+ try {
+ System.nanoTime();
+ catch_phi = array2;
+ System.nanoTime();
+ } catch (Throwable ex) {
+ catch_phi[0] = 14;
+ }
+ }
+
+ public static void main(String[] args) { }
+}