1# Copyright (C) 2014 The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#      http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
15.class public LTypePropagation;
16
17.super Ljava/lang/Object;
18
19.method public static method([I)V
20   .registers 3
21   const/4 v0, 0
22   aget v1, v2, v0
23   add-int v2, v1, v0
24   if-eq v1, v0, :end
25   # Putting a float in v1 will lead to the creation of a phi with one
26   # float input and one integer input. Since the SSA builder trusts
27   # the verifier, it assumes that the integer input must be converted
28   # to float. However, since v0 is not used afterwards, the verifier
29   # hasn't ensured that. Therefore, the compiler must remove
30   # the phi prior to doing type propagation.
31   int-to-float v1, v0
32   :end
33   # Do a call to create an environment that will capture all Dex registers.
34   # This environment is the reason why a phi is created at the join block
35   # of the if.
36   invoke-static {}, LTypePropagation;->emptyMethod()V
37   return-void
38.end method
39
40.method public static emptyMethod()V
41   .registers 0
42   return-void
43.end method
44