1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17public class Main {
18  public static void main(String[] args) {
19    if (new Main().$opt$TestFloatPhi() != 33.0f) {
20      throw new Error("Unexpected result");
21    }
22  }
23
24  public float $opt$TestFloatPhi() {
25    float a = floatField;
26    float b = 42.0f;
27    if (test1) {
28      // The phi for `a` will be found to be of type float.
29      a = otherFloatField;
30      // The phi for `b` will be found to be of type int (constants in DEX).
31      b = 33.0f;
32    }
33    // Use a different condition to avoid having dx being too clever.
34    if (test2) {
35      // Type propagation now realizes that `b` must be of type float. So
36      // it requests a float equivalent for `b`. Because the phi for `a` is
37      // next to the phi for `b` in the phi list, the compiler used to crash,
38      // assuming that a float phi following a phi *must* be for the same DEX
39      // register.
40      a = b;
41    }
42    return a;
43  }
44
45  float floatField = 4.2f;
46  float otherFloatField = 42.2f;
47  boolean test1 = true;
48  boolean test2 = true;
49}
50