1 /*
2  * Copyright (C) 2017 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 
17 public class Main {
18 
19   /// CHECK-START: char Main.$noinline$inlineMonomorphic(java.lang.CharSequence) inliner (before)
20   /// CHECK:       InvokeInterface method_name:java.lang.CharSequence.charAt
21 
22   /// CHECK-START: char Main.$noinline$inlineMonomorphic(java.lang.CharSequence) inliner (after)
23   /// CHECK:       Deoptimize
24   /// CHECK:       InvokeVirtual method_name:java.lang.String.charAt intrinsic:StringCharAt
25 
26   /// CHECK-START: char Main.$noinline$inlineMonomorphic(java.lang.CharSequence) instruction_simplifier$after_inlining (after)
27   /// CHECK:       Deoptimize
28   /// CHECK-NOT:   InvokeInterface
29   /// CHECK-NOT:   InvokeVirtual
30 
$noinline$inlineMonomorphic(CharSequence cs)31   public static char $noinline$inlineMonomorphic(CharSequence cs) {
32     return cs.charAt(0);
33   }
34 
35   /// CHECK-START: char Main.$noinline$inlinePolymorphic(java.lang.CharSequence) inliner (before)
36   /// CHECK:       InvokeInterface method_name:java.lang.CharSequence.charAt
37 
38   /// CHECK-START: char Main.$noinline$inlinePolymorphic(java.lang.CharSequence) inliner (after)
39   /// CHECK-DAG:   InvokeVirtual method_name:java.lang.String.charAt intrinsic:StringCharAt
40   /// CHECK-DAG:   Deoptimize
41 
42   /// CHECK-START: char Main.$noinline$inlinePolymorphic(java.lang.CharSequence) instruction_simplifier$after_inlining (after)
43   /// CHECK:       Deoptimize
44 
45   /// CHECK-START: char Main.$noinline$inlinePolymorphic(java.lang.CharSequence) instruction_simplifier$after_inlining (after)
46   /// CHECK-NOT:   InvokeInterface
47 
48   /// CHECK-START: char Main.$noinline$inlinePolymorphic(java.lang.CharSequence) instruction_simplifier$after_inlining (after)
49   /// CHECK-NOT:   InvokeVirtual method_name:java.lang.String.charAt
50 
$noinline$inlinePolymorphic(CharSequence cs)51   public static char $noinline$inlinePolymorphic(CharSequence cs) {
52     return cs.charAt(0);
53   }
54 
55   /// CHECK-START: char Main.$noinline$knownReceiverType() inliner (before)
56   /// CHECK:       InvokeInterface method_name:java.lang.CharSequence.charAt
57 
58   /// CHECK-START: char Main.$noinline$knownReceiverType() inliner (after)
59   /// CHECK:       InvokeVirtual method_name:java.lang.String.charAt intrinsic:StringCharAt
60 
61   /// CHECK-START: char Main.$noinline$knownReceiverType() instruction_simplifier$after_inlining (after)
62   /// CHECK-NOT:   InvokeInterface
63   /// CHECK-NOT:   InvokeVirtual
64 
$noinline$knownReceiverType()65   public static char $noinline$knownReceiverType() {
66     CharSequence cs = "abc";
67     return cs.charAt(1);
68   }
69 
70   /// CHECK-START: boolean Main.$noinline$stringEquals(java.lang.Object) inliner (before)
71   /// CHECK:       InvokeVirtual method_name:java.lang.Object.equals intrinsic:None
72 
73   /// CHECK-START: boolean Main.$noinline$stringEquals(java.lang.Object) inliner (after)
74   /// CHECK:       Deoptimize
75   /// CHECK:       InvokeVirtual method_name:java.lang.String.equals intrinsic:StringEquals
76 
77   /// CHECK-START: boolean Main.$noinline$stringEquals(java.lang.Object) instruction_simplifier$after_inlining (after)
78   /// CHECK:       Deoptimize
79   /// CHECK:       InvokeVirtual method_name:java.lang.String.equals intrinsic:StringEquals
80 
$noinline$stringEquals(Object obj)81   public static boolean $noinline$stringEquals(Object obj) {
82     return obj.equals("def");
83   }
84 
test()85   public static void test() {
86     ensureJitBaselineCompiled(Main.class, "$noinline$stringEquals");
87     ensureJitBaselineCompiled(Main.class, "$noinline$inlineMonomorphic");
88     ensureJitBaselineCompiled(Main.class, "$noinline$knownReceiverType");
89     ensureJitBaselineCompiled(Main.class, "$noinline$inlinePolymorphic");
90     // Warm up inline cache.
91     for (int i = 0; i < 600000; i++) {
92       $noinline$inlineMonomorphic(str);
93       $noinline$stringEquals(str);
94       $noinline$inlinePolymorphic(str);
95       $noinline$inlinePolymorphic(strBuilder);
96     }
97     ensureJitCompiled(Main.class, "$noinline$stringEquals");
98     ensureJitCompiled(Main.class, "$noinline$inlineMonomorphic");
99     ensureJitCompiled(Main.class, "$noinline$inlinePolymorphic");
100     ensureJitCompiled(Main.class, "$noinline$knownReceiverType");
101     if ($noinline$inlineMonomorphic(str) != 'x') {
102       throw new Error("Expected x");
103     }
104     if ($noinline$inlinePolymorphic(str) != 'x') {
105       throw new Error("Expected x");
106     }
107     if ($noinline$inlinePolymorphic(strBuilder) != 'a') {
108       throw new Error("Expected a");
109     }
110     if ($noinline$knownReceiverType() != 'b') {
111       throw new Error("Expected b");
112     }
113     if ($noinline$stringEquals("abc")) {
114       throw new Error("Expected false");
115     }
116   }
117 
main(String[] args)118   public static void main(String[] args) {
119     System.loadLibrary(args[0]);
120     test();
121   }
122 
123   static String str = "xyz";
124   static StringBuilder strBuilder = new StringBuilder("abc");
125 
ensureJitBaselineCompiled(Class<?> itf, String method_name)126   private static native void ensureJitBaselineCompiled(Class<?> itf, String method_name);
ensureJitCompiled(Class<?> itf, String method_name)127   private static native void ensureJitCompiled(Class<?> itf, String method_name);
128 }
129