1# Copyright (C) 2016 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 LIrreducibleLoop;
16
17.super Ljava/lang/Object;
18
19## CHECK-START-X86: int IrreducibleLoop.simpleLoop(int) dead_code_elimination$initial (before)
20## CHECK-DAG: <<Constant:i\d+>>   IntConstant 42
21## CHECK-DAG:                     InvokeStaticOrDirect [<<Constant>>{{(,[ij]\d+)?}}] loop:{{B\d+}} irreducible:true
22## CHECK-DAG:                     InvokeStaticOrDirect [<<Constant>>{{(,[ij]\d+)?}}] loop:none
23.method public static simpleLoop(I)I
24   .registers 3
25   const/16 v0, 42
26   if-eqz p0, :loop_entry
27   goto :other_loop_pre_entry
28
29   # The then part: beginning of the irreducible loop.
30   :loop_entry
31   if-nez p0, :exit
32   invoke-static {v0},LIrreducibleLoop;->$noinline$m(I)V
33   :other_loop_entry
34   goto :loop_entry
35
36   # The else part: a block uses the ArtMethod and branches to
37   # a block that doesn't. The register allocator used to trip there, as the
38   # ArtMethod was a live_in of the last block before the loop, but did not have
39   # a location due to our liveness analysis.
40   :other_loop_pre_entry
41   if-eqz p0, :other_loop_entry
42   invoke-static {v0},LIrreducibleLoop;->$noinline$m(I)V
43   goto :other_loop_entry
44
45   :exit
46   return v0
47.end method
48
49.method public static $noinline$m(I)V
50   .registers 3
51   const/16 v0, 0
52   sget-boolean v1,LIrreducibleLoop;->doThrow:Z
53   if-eqz v1, :exit
54   # Prevent inlining.
55   throw v0
56   :exit
57   return-void
58.end method
59
60.field public static doThrow:Z
61