| # Copyright (C) 2014 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. |
| |
| .class public LTypePropagation; |
| |
| .super Ljava/lang/Object; |
| |
| .method public static method([I)V |
| .registers 3 |
| const/4 v0, 0 |
| aget v1, v2, v0 |
| add-int v2, v1, v0 |
| if-eq v1, v0, :end |
| # Putting a float in v1 will lead to the creation of a phi with one |
| # float input and one integer input. Since the SSA builder trusts |
| # the verifier, it assumes that the integer input must be converted |
| # to float. However, since v0 is not used afterwards, the verifier |
| # hasn't ensured that. Therefore, the compiler must remove |
| # the phi prior to doing type propagation. |
| int-to-float v1, v0 |
| :end |
| # Do a call to create an environment that will capture all Dex registers. |
| # This environment is the reason why a phi is created at the join block |
| # of the if. |
| invoke-static {}, LTypePropagation;->emptyMethod()V |
| return-void |
| .end method |
| |
| .method public static emptyMethod()V |
| .registers 0 |
| return-void |
| .end method |
