Digging Into D8 and R8 (Droidcon NYC 2018)

D8 has replaced DX as the default dexer, the tool which converts Java bytecode to Dalvik bytecode. R8 is coming as the default shrinker, the tool which removes and optimizes code. While you may have heard about one or both of these tools before, not a lot of information exists on the advantages they bring. This talk will cover those advantages both in the scope of your entire application but also with very localized examples in a single class or method. We'll also look at some tricks that D8 and R8 can do which their predecessors could not. Finally, we'll cover how to enable both tools in your build and recommendations to ensure you're getting the most out of each.

Video: https://youtu.be/99H7COwhIpI

Transcript

1. DIGGING INTO D8 AND R8 @JakeWharton
2. $
3. $ export ANDROID_HOME=/path/to/my/sdk
4. $ export ANDROID_HOME=/path/to/my/sdk
 
 $ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
5. $ export ANDROID_HOME=/path/to/my/sdk
 
 $ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git Cloning into 'depot_tools'...
 remote: Sending approximately 20.90 MiB ...
 remote: Total 27643 (delta 19810), reused 27643 (delta 19810)
 Receiving objects: 100% (27643/27643), 20.90 MiB | 9.97 MiB/s, done.
 Resolving deltas: 100% (19810/19810), done.
6. $ export ANDROID_HOME=/path/to/my/sdk
 
 $ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git Cloning into 'depot_tools'...
 remote: Sending approximately 20.90 MiB ...
 remote: Total 27643 (delta 19810), reused 27643 (delta 19810)
 Receiving objects: 100% (27643/27643), 20.90 MiB | 9.97 MiB/s, done.
 Resolving deltas: 100% (19810/19810), done.
 
 $ export PATH=$PATH:`pwd`/depot_tools
7. $ export ANDROID_HOME=/path/to/my/sdk
 
 $ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git Cloning into 'depot_tools'...
 remote: Sending approximately 20.90 MiB ...
 remote: Total 27643 (delta 19810), reused 27643 (delta 19810)
 Receiving objects: 100% (27643/27643), 20.90 MiB | 9.97 MiB/s, done.
 Resolving deltas: 100% (19810/19810), done.
 
 $ export PATH=$PATH:`pwd`/depot_tools
 
 $ git clone https://r8.googlesource.com/r8
8. $ export ANDROID_HOME=/path/to/my/sdk
 
 $ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git Cloning into 'depot_tools'...
 remote: Sending approximately 20.90 MiB ...
 remote: Total 27643 (delta 19810), reused 27643 (delta 19810)
 Receiving objects: 100% (27643/27643), 20.90 MiB | 9.97 MiB/s, done.
 Resolving deltas: 100% (19810/19810), done.
 
 $ export PATH=$PATH:`pwd`/depot_tools
 
 $ git clone https://r8.googlesource.com/r8 Cloning into 'r8'...
 remote: Sending approximately 21.71 MiB ...
 remote: Counting objects: 67, done
 remote: Total 56838 (delta 23158), reused 56838 (delta 23158)
 Receiving objects: 100% (56838/56838), 21.71 MiB | 10.21 MiB/s, done.
 Resolving deltas: 100% (23158/23158), done.
9. 
 $ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git Cloning into 'depot_tools'...
 remote: Sending approximately 20.90 MiB ...
 remote: Total 27643 (delta 19810), reused 27643 (delta 19810)
 Receiving objects: 100% (27643/27643), 20.90 MiB | 9.97 MiB/s, done.
 Resolving deltas: 100% (19810/19810), done.
 
 $ export PATH=$PATH:`pwd`/depot_tools
 
 $ git clone https://r8.googlesource.com/r8 Cloning into 'r8'...
 remote: Sending approximately 21.71 MiB ...
 remote: Counting objects: 67, done
 remote: Total 56838 (delta 23158), reused 56838 (delta 23158)
 Receiving objects: 100% (56838/56838), 21.71 MiB | 10.21 MiB/s, done.
 Resolving deltas: 100% (23158/23158), done.
 
 $ cd r8
10. Cloning into 'depot_tools'...
 remote: Sending approximately 20.90 MiB ...
 remote: Total 27643 (delta 19810), reused 27643 (delta 19810)
 Receiving objects: 100% (27643/27643), 20.90 MiB | 9.97 MiB/s, done.
 Resolving deltas: 100% (19810/19810), done.
 
 $ export PATH=$PATH:`pwd`/depot_tools
 
 $ git clone https://r8.googlesource.com/r8 Cloning into 'r8'...
 remote: Sending approximately 21.71 MiB ...
 remote: Counting objects: 67, done
 remote: Total 56838 (delta 23158), reused 56838 (delta 23158)
 Receiving objects: 100% (56838/56838), 21.71 MiB | 10.21 MiB/s, done.
 Resolving deltas: 100% (23158/23158), done.
 
 $ cd r8
 
 $ tools/gradle.py d8 r8
11. 
 $ git clone https://r8.googlesource.com/r8 Cloning into 'r8'...
 remote: Sending approximately 21.71 MiB ...
 remote: Counting objects: 67, done
 remote: Total 56838 (delta 23158), reused 56838 (delta 23158)
 Receiving objects: 100% (56838/56838), 21.71 MiB | 10.21 MiB/s, done.
 Resolving deltas: 100% (23158/23158), done.
 
 $ cd r8
 
 $ tools/gradle.py d8 r8 (… gradle output removed …)
 :R8
 :D8
 
 BUILD SUCCESSFUL
 
 Total time: 28.471 secs
12. Cloning into 'r8'...
 remote: Sending approximately 21.71 MiB ...
 remote: Counting objects: 67, done
 remote: Total 56838 (delta 23158), reused 56838 (delta 23158)
 Receiving objects: 100% (56838/56838), 21.71 MiB | 10.21 MiB/s, done.
 Resolving deltas: 100% (23158/23158), done.
 
 $ cd r8
 
 $ tools/gradle.py d8 r8 (… gradle output removed …)
 :R8
 :D8
 
 BUILD SUCCESSFUL
 
 Total time: 28.471 secs
 
 $ export R8_HOME=`pwd`
13. dx compilers sources libraries transforms
14. $
15. $ cat Java8.java
16. $ cat Java8.java class Java8 { interface Consumer<T> { void accept(T value); } public static void main(String... args) { load(s -> System.out.println(s)); } private static void load(Consumer<String> c) { c.accept("Hello!"); } }
17. $ cat Java8.java class Java8 { interface Consumer<T> { void accept(T value); }W public static void main(String... args) { load(s -> System.out.println(s)); }X private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
 
 $ javac *.java
18. $ cat Java8.java class Java8 { interface Consumer<T> { void accept(T value); }W public static void main(String... args) { load(s -> System.out.println(s)); }X private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
 
 $ javac *.java
 
 $ ls
19. $ cat Java8.java class Java8 { interface Consumer<T> { void accept(T value); }W public static void main(String... args) { load(s -> System.out.println(s)); }X private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
 
 $ javac *.java
 
 $ ls Java8.java Java8.class Java8$Consumer.class
20. interface Consumer<T> { void accept(T value); }W public static void main(String... args) { load(s -> System.out.println(s)); }X private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
 
 $ javac *.java
 
 $ ls Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class
21. load(s -> System.out.println(s)); }X private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
 
 $ javac *.java
 
 $ ls Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class Uncaught translation error: com.android.dx.cf.code.SimException:
 ERROR in Java8.main:([Ljava/lang/String;)V:
 invalid opcode ba - invokedynamic requires --min-sdk-version >= 26
 (currently 13)
 1 error; aborting
22. dx compilers sources libraries transforms
23. Desugar dx compilers sources libraries transforms
24. Desugar dx compilers sources libraries transforms
25. Desugar D8 compilers sources libraries transforms
26. D8 compilers sources libraries transforms Desugar
27. Desugar D8 compilers sources libraries transforms
28. load(s -> System.out.println(s)); }X private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
 
 $ javac *.java
 
 $ ls Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class Uncaught translation error: com.android.dx.cf.code.SimException:
 ERROR in Java8.main:([Ljava/lang/String;)V:
 invalid opcode ba - invokedynamic requires --min-sdk-version >= 26
 (currently 13)
 1 error; aborting
29. }Z
 
 $ javac *.java
 
 $ ls Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class Uncaught translation error: com.android.dx.cf.code.SimException:
 ERROR in Java8.main:([Ljava/lang/String;)V:
 invalid opcode ba - invokedynamic requires --min-sdk-version >= 26
 (currently 13)
 1 error; aborting
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
30. 
 $ ls Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class Uncaught translation error: com.android.dx.cf.code.SimException:
 ERROR in Java8.main:([Ljava/lang/String;)V:
 invalid opcode ba - invokedynamic requires --min-sdk-version >= 26
 (currently 13)
 1 error; aborting
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ ls Java8.java Java8.class Java8$Consumer.class classes.dex
31. Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class Uncaught translation error: com.android.dx.cf.code.SimException:
 ERROR in Java8.main:([Ljava/lang/String;)V:
 invalid opcode ba - invokedynamic requires --min-sdk-version >= 26
 (currently 13)
 1 error; aborting
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ ls Java8.java Java8.class Java8$Consumer.class classes.dex $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
32. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex Class #0 - Class descriptor : 'LJava8$Consumer;' Access flags : 0x0600 (INTERFACE ABSTRACT) Superclass : 'Ljava/lang/Object;' Interfaces - Static fields - Instance fields - Direct methods - Virtual methods - #0 : (in LJava8$Consumer;) name : 'accept' type : '(Ljava/lang/Object;)V' access : 0x0401 (PUBLIC ABSTRACT) code : (none) source_file_idx : 14 (Lambda.java) Class #1 - Class descriptor : 'LJava8;' Access flags : 0x0000 () Superclass : 'Ljava/lang/Object;' Interfaces - Static fields - Instance fields - Direct methods - #0 : (in LJava8;) name : '<init>' type : '()V' access : 0x10000 (CONSTRUCTOR) code - registers : 1 ins : 1 outs : 1 insns size : 4 16-bit code units 000288: |[000288] Java8.<init>:()V 000298: 7010 0900 0000 |0000: invoke-direct {v0}, Ljava/lang/Object;.<init>:()V // method@0009 00029e: 0e00 |0003: return-void catches : (none) positions : 0x0000 line=1 locals : 0x0000 - 0x0004 reg=0 this LJava8; #1 : (in LJava8;) name : 'lambda$main$0' type : '(Ljava/lang/String;)V' access : 0x1008 (STATIC SYNTHETIC) code - registers : 2 ins : 1 outs : 2 insns size : 6 16-bit code units 0002a0: |[0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V 0002b0: 6200 0100 |0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream; // field@0001 0002b4: 6e20 0800 1000 |0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V // method@0008 0002ba: 0e00 |0005: return-void catches : (none) positions : 0x0000 line=7 locals : #2 : (in LJava8;) name : 'load' type : '(LJava8$Consumer;)V' access : 0x0009 (PUBLIC STATIC) code - registers : 2 ins : 1 outs : 2 insns size : 6 16-bit code units 0002bc: |[0002bc] Java8.load:(LJava8$Consumer;)V 0002cc: 1a00 0800 |0000: const-string v0, "Hello!" // string@0008 0002d0: 7220 0300 0100 |0002: invoke-interface {v1, v0}, LJava8$Consumer;.accept:(Ljava/lang/Object;)V // method@0003 0002d6: 0e00 |0005: return-void catches : (none) positions : 0x0002 line=13 locals : #3 : (in LJava8;) name : 'main' type : '([Ljava/lang/String;)V' access : 0x0089 (PUBLIC STATIC VARARGS) code - registers : 1 ins : 1 outs : 1 insns size : 6 16-bit code units 0002d8: |[0002d8] Java8.main:([Ljava/lang/String;)V 0002e8: 6200 0000 |0000: sget-object v0, L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;.INSTANCE:L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA; // field@0000 0002ec: 7110 0600 0000 |0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V // method@0006 0002f2: 0e00 |0005: return-void catches : (none) positions : 0x0000 line=7 locals : Virtual methods - source_file_idx : 14 (Lambda.java) Class #2 - Class descriptor : 'L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;' Access flags : 0x1011 (PUBLIC FINAL SYNTHETIC) Superclass : 'Ljava/lang/Object;' Interfaces - #0 : 'LJava8$Consumer;' Static fields - #0 : (in L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;) name : 'INSTANCE' type : 'L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;' access : 0x1019 (PUBLIC STATIC FINAL SYNTHETIC) Instance fields - Direct methods - #0 : (in L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;) name : '<clinit>' type : '()V' access : 0x11008 (STATIC SYNTHETIC CONSTRUCTOR) code - registers : 1 ins : 0 outs : 1 insns size : 8 16-bit code units 000234: |[000234] -..Lambda.Java8.ZLMFZvUeLmahhYBQbdt-2RNqTMA.<clinit>:()V 000244: 2200 0000 |0000: new-instance v0, L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA; // type@0000 000248: 7010 0100 0000 |0002: invoke-direct {v0}, L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;.<init>:()V // method@0001 00024e: 6900 0000 |0005: sput-object v0, L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;.INSTANCE:L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA; // field@0000 000252: 0e00 |0007: return-void catches : (none) positions : locals : #1 : (in L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;) name : '<init>' type : '()V' access : 0x11002 (PRIVATE SYNTHETIC CONSTRUCTOR) code - registers : 1 ins : 1 outs : 1 insns size : 4 16-bit code units 000254: |[000254] -..Lambda.Java8.ZLMFZvUeLmahhYBQbdt-2RNqTMA.<init>:()V 000264: 7010 0900 0000 |0000: invoke-direct {v0}, Ljava/lang/Object;.<init>:()V // method@0009 00026a: 0e00 |0003: return-void catches : (none) positions : locals : Virtual methods - #0 : (in L-$$Lambda$Java8$ZLMFZvUeLmahhYBQbdt-2RNqTMA;) name : 'accept' type : '(Ljava/lang/Object;)V' access : 0x0011 (PUBLIC FINAL) code - registers : 2 ins : 2 outs : 1 insns size : 6 16-bit code units 00026c: |[00026c] -..Lambda.Java8.ZLMFZvUeLmahhYBQbdt-2RNqTMA.accept:(Ljava/lang/Object;)V 00027c: 1f01 0900 |0000: check-cast v1, Ljava/lang/String; // type@0009 000280: 7110 0500 0100 |0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V // method@0005 000286: 0e00 |0005: return-void catches : (none) positions : locals : source_file_idx : 28 (lambda) + /Users/jakew/Library/Android/sdk/build-tools/28.0.2/dexdump -d r8.dex Processing 'r8.dex'... Opened 'r8.dex', DEX version '035' Class #0 - Class descriptor : 'LJava8;' Access flags : 0x0000 () Superclass : 'Ljava/lang/Object;' Interfaces - Static fields - Instance fields - Direct methods - #0 : (in LJava8;) name : 'lambda$main$0' type : '(Ljava/lang/String;)V' access : 0x1008 (STATIC SYNTHETIC) code - registers : 2 ins : 1 outs : 2 insns size : 6 16-bit code units 000120: |[000120] Java8.lambda$main$0:(Ljava/lang/String;)V 000130: 6200 0000 |0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream; // field@0000 000134: 6e20 0200 1000 |0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V // method@0002 00013a: 0e00 |0005: return-void catches : (none) positions : 0x0000 line=1 locals : #1 : (in LJava8;) name : 'main' type : '([Ljava/lang/String;)V' access : 0x0089 (PUBLIC STATIC VARARGS) code - registers : 1 ins : 1 outs : 1 insns size : 8 16-bit code units 00013c: |[00013c] Java8.main:([Ljava/lang/String;)V 00014c: 1a00 0100 |0000: const-string v0, "Hello!" // string@0001 000150: 1f00 0300 |0002: check-cast v0, Ljava/lang/String; // type@0003 000154: 7110 0000 0000 |0004: invoke-static {v0}, LJava8;.lambda$main$0:(Ljava/lang/String;)V // method@0000 00015a: 0e00 |0007: return-void catches : (none) positions : locals : Virtual methods - source_file_idx : 0 ()
33. Java8.java Java8.class Java8$Consumer.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dx --dex --output . *.class Uncaught translation error: com.android.dx.cf.code.SimException:
 ERROR in Java8.main:([Ljava/lang/String;)V:
 invalid opcode ba - invokedynamic requires --min-sdk-version >= 26
 (currently 13)
 1 error; aborting $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ ls Java8.java Java8.class Java8$Consumer.class classes.dex $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
34. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
35. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
36. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
37. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
38. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
39. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
40. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
41. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
42. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
43. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
44. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002d8] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, LJava8$1;.INSTANCE:LJava8$1;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: return-void
 
 [0002a0] Java8.lambda$main$0:(Ljava/lang/String;)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0005: return-void
 
 [000234] Java8$1.<clinit>:()V
 0000: new-instance v0, LJava8$1;
 0002: invoke-direct {v0}, LJava8$1;.<init>:()V
 0005: sput-object v0, LJava8$1;.INSTANCE:LJava8;
 0007: return-void
 
 [00026c] Java8$1.accept:(Ljava/lang/Object;)V
 0000: check-cast v1, Ljava/lang/String;
 0002: invoke-static {v1}, LJava8;.lambda$main$0:(Ljava/lang/String;)V
 0005: return-void
45. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
46. class Java8 { public static void main(String... args) { load(s -> lambda$main$0(s)); }X static void lambda$main$0(String s) { System.out.println(s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
47. s -> class Java8$1 implements Consumer<String> { @Override public void accept(String s) { Java8.lambda$main$0(s); }Y }Z class Java8 { public static void main(String... args) { load(new Java8$1()); }X static void lambda$main$0(String s) { System.out.println(s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
48. class Java8$1 implements Consumer<String> { static final Java8$1 INSTANCE = new Java8$1(); @Override public void accept(String s) { Java8.lambda$main$0(s); }Y }Z class Java8 { public static void main(String... args) { load(Java8$1.INSTANCE); }X static void lambda$main$0(String s) { System.out.println(s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
49. class Java8$1 implements Consumer<String> { static final Java8$1 INSTANCE = new Java8$1(); @Override public void accept(String s) { Java8.lambda$main$0(s); }Y }Z class Java8 { public static void main(String... args) { load(Java8$1.INSTANCE); }X static void lambda$main$0(String s) { System.out.println(s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
50. class -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY implements Consumer<String> { static final -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY INSTANCE = new -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY(); @Override public void accept(String s) { Java8.lambda$main$0(s); }Y }Z class Java8 { public static void main(String... args) { load(-$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY.INSTANCE); }X static void lambda$main$0(String s) { System.out.println(s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
51. class -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY implements Consumer<String> { static final -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY INSTANCE = new -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY(); @Override public void accept(String s) { Java8.lambda$main$0(s); }Y }Z class Java8 { public static void main(String... args) { load(-$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY.INSTANCE); }X static void lambda$main$0(String s) { System.out.println(s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
52. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
53. class Java8 { public static void main(String... args) { load(s -> System.out.println(args[0] + " " + s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
54. s -> class -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY implements Consumer<String> { private final String[] args; -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY(String[] args) { this.args = args; } @Override public void accept(String s) { Java8.lambda$main$0(args, s); } } class Java8 { public static void main(String... args) { load(new -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY(args)); }X static void lambda$main$0(String[] args, String s) { System.out.println(args[0] + " " + s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
55. class -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY implements Consumer<String> { private final String[] args; -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY(String[] args) { this.args = args; } @Override public void accept(String s) { Java8.lambda$main$0(args, s); } } class Lambda { public static void main(String... args) { load(new -$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY(args)); }X static void lambda$main$0(String[] args, String s) { System.out.println(args[0] + " " + s); }A interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
56. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
57. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); // other code… load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
58. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); // other code… load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java
59. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); // other code… load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
60. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); // other code… load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
61. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00039c] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, L-$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY;.INSTANCE
 :L-$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: sget-object v0, L-$$Lambda$Java8$6t081pcxeVAk2jXN7bDL1QxzIIU;.INSTANCE
 :L-$$Lambda$Java8$6t081pcxeVAk2jXN7bDL1QxzIIU;
 0007: invoke-static {v0}, LJava;.load:(LJava8$Consumer;)V
 000a: return-void
62. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00039c] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v0, L-$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY;.INSTANCE
 :L-$$Lambda$Java8$fcyZxanqBZSHC_nf-noKh-e3bnY;
 0002: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0005: sget-object v0, L-$$Lambda$Java8$6t081pcxeVAk2jXN7bDL1QxzIIU;.INSTANCE
 :L-$$Lambda$Java8$6t081pcxeVAk2jXN7bDL1QxzIIU;
 0007: invoke-static {v0}, LJava;.load:(LJava8$Consumer;)V
 000a: return-void
63. class Java8 { public static void main(String... args) { load(s -> System.out.println(s)); // other code… load(s -> System.out.println(s)); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
64. class Java8 { public static void main(String... args) { load(System.out::println); // other code… load(System.out::println); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z
65. class Java8 { public static void main(String... args) { load(System.out::println); // other code… load(System.out::println); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java
66. class Java8 { public static void main(String... args) { load(System.out::println); // other code… load(System.out::println); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
67. class Java8 { public static void main(String... args) { load(System.out::println); // other code… load(System.out::println); }X interface Consumer<T> { void accept(T value); }W private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
68. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002bc] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 0004: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0007: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 000a: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000c: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 000e: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0011: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0014: return-void
69. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002bc] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 0004: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0007: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 000a: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000c: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 000e: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0011: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0014: return-void
70. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002bc] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 0004: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0007: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 000a: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000c: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 000e: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0011: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0014: return-void
71. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002bc] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 0004: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0007: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 000a: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000c: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 000e: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0011: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0014: return-void
72. private static void load(Consumer<String> c) { c.accept("Hello!"); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [0002bc] Java8.main:([Ljava/lang/String;)V
 0000: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 0004: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0007: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 000a: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000c: new-instance v0, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;
 000e: invoke-direct {v0, v1}, L-$$Lambda$3a8cOTS_BDddTs3zL5A7slX7lPc;.<init>:(Ljava/io/PrintStream;)V
 0011: invoke-static {v0}, LJava8;.load:(LJava8$Consumer;)V
 0014: return-void
73. $ cat Not.java
74. $ cat Not.java class Not { static void print(int value) { System.out.println(~value); }Y }Z
75. $ cat Not.java class Not { static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java
76. $ cat Not.java class Not { static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
77. $ cat Not.java class Not { static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
78. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
79. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
80. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
81. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void 00010100 xor 11111111
82. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void 00010100 xor 11111111 11101011 =
83. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
84. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
85. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
86. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
87. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
88. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
89. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
90. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
91. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
92. static void print(int value) { System.out.println(~value); }Y }Z $ javac *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
93. $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
94. $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
95. $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
96. --release \
 --output . \
 *.class $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
97. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
98. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
99. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
100. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
101. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
102. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
103. [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: xor-int/lit8 v1, v1, #int -1
 0004: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0007: return-void
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --min-api 21
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000134] Not.print:(I)V
 0000: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0002: not-int v1, v1
 0003: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(I)V
 0006: return-void
104. D8 compilers sources libraries transforms
105. ProGuard D8 compilers sources libraries transforms
106. D8 compilers sources libraries transforms ProGuard
107. ProGuard compilers sources libraries transforms R8
108. $ cat Greeter.kt
109. $ cat Greeter.kt fun main(vararg args: String) { println(Greeter.hello("Droidcon")) } class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) } }
110. $ cat Greeter.kt fun main(vararg args: String) { println(Greeter.hello("Droidcon")) } class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) } }
111. $ cat Greeter.kt fun main(vararg args: String) { println(Greeter.hello("Droidcon")) } class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) } }
112. $ cat Greeter.kt fun main(vararg args: String) { println(Greeter.hello("Droidcon")) } class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) } }
113. $ cat Greeter.kt fun main(vararg args: String) { println(Greeter.hello("Droidcon")) } class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) } }
114. $ cat Greeter.kt fun main(vararg args: String) { println(Greeter.hello("Droidcon")) }Z class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }Y }Z
 
 $ kotlinc -classpath $ANDROID_HOME/platforms/android-28/android.jar *.kt
115. fun main(vararg args: String) { println(Greeter.hello("Droidcon")) }Z class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }Y }Z
 
 $ kotlinc -classpath $ANDROID_HOME/platforms/android-28/android.jar *.kt
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
116. println(Greeter.hello("Droidcon")) }Z class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }Y }Z
 
 $ kotlinc -classpath $ANDROID_HOME/platforms/android-28/android.jar *.kt
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
117. --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 [000314] Greeter.Companion.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
118. --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 [000314] Greeter.Companion.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
119. --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 [000314] Greeter.Companion.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
120. --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 [000314] Greeter.Companion.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
121. --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 [000314] Greeter.Companion.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt
122. 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 [000314] Greeter.Companion.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate
123. 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
124. 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
125. 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
126. 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
127. 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v3}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v3
 000b: return-object v3
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
128. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
129. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
130. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
131. 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
132. 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
133. 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
134. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }B }A
135. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }B }A public final class Greeter { public static final Companion Companion = new Companion(); private final String greeting; public Greeter(String greeting) { this.greeting = greeting; } public String getGreeting() { return greeting; } public String greet(String name) { return greeting + ", " + name; } public static final class Companion { private Companion() {} public String hello(String name) { return new Greeter("Hello").greet(name); }X }Y }Z
136. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }B }A public final class Greeter { private final String greeting; public Greeter(String greeting) { this.greeting = greeting; } public String getGreeting() { return greeting; } public String greet(String name) { return greeting + ", " + name; } public static String hello(String name) { return new Greeter("Hello").greet(name); }X }Z
137. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { fun hello(name: String) = Greeter("Hello").greet(name) }B }A
138. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { @JvmStatic fun hello(name: String) = Greeter("Hello").greet(name) }B }A
139. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { @JvmStatic fun hello(name: String) = Greeter("Hello").greet(name) } }
 
 $ kotlinc -classpath $ANDROID_HOME/platforms/android-28/android.jar *.kt
140. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { @JvmStatic fun hello(name: String) = Greeter("Hello").greet(name) }B }A
 
 $ kotlinc -classpath $ANDROID_HOME/platforms/android-28/android.jar *.kt
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
141. class Greeter(val greeting: String) { fun greet(name: String) = "$greeting, $name!" companion object { @JvmStatic fun hello(name: String) = Greeter("Hello").greet(name) }B }A
 
 $ kotlinc -classpath $ANDROID_HOME/platforms/android-28/android.jar *.kt
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
142. --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
143. --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
144. --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
145. --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
146. --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000370] GreeterKt.main:([Ljava/lang/String;)V
 0000: sget-object v1, LGreeter;.Companion:LGreeter$Companion;
 0002: const-string v0, "Droidcon"
 0005: invoke-virtual {v1, v0}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
147. 0008: move-result-object v1
 0009: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
148. 000b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000e: return-void
 
 #2 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [00042c] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: sget-object v0, LGreeter;.Companion:LGreeter$Companion;
 0002: invoke-virtual {v0, v1}, LGreeter$Companion;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: return-object v1
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
149. 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
150. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
151. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
152. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000234] GreeterKt.main:([Ljava/lang/String;)V
 0000: const-string v1, "Droidcon" // string@0004
 0002: invoke-static {v1}, LGreeter;.hello:(Ljava/lang/String;)Ljava/lang/String;
 0005: move-result-object v1
 0006: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 000b: return-void
 
 #1 : (in LGreeter;)
 name : 'hello'
 type : '(Ljava/lang/String;)Ljava/lang/String;'
 access : 0x0019 (PUBLIC STATIC FINAL)
 code -
 [0002bc] Greeter.hello:(Ljava/lang/String;)Ljava/lang/String;
 0000: new-instance v0, LGreeter;
 0002: const-string v1, "Hello"
 0004: invoke-direct {v0, v1}, LGreeter;.<init>:(Ljava/lang/String;)V
 0007: invoke-virtual {v0, v2}, LGreeter;.greet:(Ljava/lang/String;)Ljava/lang/String;
 000a: move-result-object v2
 000b: return-object v2
153. @Module object HelloGreeterModule { @Provides fun greeter() = Greeter("Hello") }
154. public final class Thing { public static final Thing INSTANCE = new Thing(); private Thing() { } public void doThing() { // … } }
155. $ cat Nulls.kt
156. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) }
157. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) }
158. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) }
159. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) }
160. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) }
161. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) } Z $ kotlinc -classpath kotlin-stdlib-1.2.61.jar *.kt
162. $ cat Nulls.kt fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) } Z $ kotlinc -classpath kotlin-stdlib-1.2.61.jar *.kt $ java -jar $R8_HOME/build/libs/d8.jar \ --lib $ANDROID_HOME/platforms/android-28/android.jar \ --lib kotlin-stdlib-1.2.61.jar \ --release \ --output . \ *.class
163. fun <T : Any> coalesce(a: T?, b: T?): T? = a ?: b fun firstOrSecond(first: String?, second: String): String = coalesce(first, second) ?: throw AssertionError() fun main(vararg args: String) { println(firstOrSecond(null, "two")) println(firstOrSecond("one", "two")) } Z $ kotlinc -classpath kotlin-stdlib-1.2.61.jar *.kt $ java -jar $R8_HOME/build/libs/d8.jar \ --lib $ANDROID_HOME/platforms/android-28/android.jar \ --lib kotlin-stdlib-1.2.61.jar \ --release \ --output . \ *.class 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
164. *.class 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000208] NullsKt.coalesce:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
 0000: if-eqz v0, 0003
 0002: goto 0004
 0003: move-object v0, v1
 0004: return-object v0
 
 [000224] NullsKt.firstOrSecond:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
 0000: const-string v0, "second"
 0002: invoke-static {v2, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: invoke-static {v1, v2}, LNullsKt;.coalesce:(LString;LString;)Ljava/lang/String;
 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V

165. *.class 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000208] NullsKt.coalesce:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
 0000: if-eqz v0, 0003
 0002: goto 0004
 0003: move-object v0, v1
 0004: return-object v0
 
 [000224] NullsKt.firstOrSecond:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
 0000: const-string v0, "second"
 0002: invoke-static {v2, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: invoke-static {v1, v2}, LNullsKt;.coalesce:(LString;LString;)Ljava/lang/String;
 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V

166. *.class 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000208] NullsKt.coalesce:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
 0000: if-eqz v0, 0003
 0002: goto 0004
 0003: move-object v0, v1
 0004: return-object v0
 
 [000224] NullsKt.firstOrSecond:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
 0000: const-string v0, "second"
 0002: invoke-static {v2, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: invoke-static {v1, v2}, LNullsKt;.coalesce:(LString;LString;)Ljava/lang/String;
 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V

167. *.class 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000208] NullsKt.coalesce:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
 0000: if-eqz v0, 0003
 0002: goto 0004
 0003: move-object v0, v1
 0004: return-object v0
 
 [000224] NullsKt.firstOrSecond:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
 0000: const-string v0, "second"
 0002: invoke-static {v2, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: invoke-static {v1, v2}, LNullsKt;.coalesce:(LString;LString;)Ljava/lang/String;
 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V

168. *.class 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000208] NullsKt.coalesce:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
 0000: if-eqz v0, 0003
 0002: goto 0004
 0003: move-object v0, v1
 0004: return-object v0
 
 [000224] NullsKt.firstOrSecond:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
 0000: const-string v0, "second"
 0002: invoke-static {v2, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: invoke-static {v1, v2}, LNullsKt;.coalesce:(LString;LString;)Ljava/lang/String;
 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V

169. 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
170. 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
171. 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
172. 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
173. 0008: move-result-object v1
 0009: if-eqz v1, 000c
 000b: return-object v1
 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
174. 000c: new-instance v1, Ljava/lang/AssertionError;
 000e: invoke-direct {v1}, Ljava/lang/AssertionError;.<init>:()V
 0011: check-cast v1, Ljava/lang/Throwable;
 0013: throw v1
 
 [00025c] NullsKt.main:([Ljava/lang/String;)V
 0000: const-string v0, "args"
 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
 
 $ cat rules.txt
175. 0002: invoke-static {v1, v0}, Lkotlin/jvm/internal/Intrinsics;.checkParameterIsNotNull:(…)V
 0005: const-string v1, "two"
 0007: const/4 v0, #int 0
 0008: invoke-static {v0, v1}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 000b: move-result-object v1
 000c: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000e: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0011: const-string v1, "one"
 0013: const-string v0, "two"
 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate -allowaccessmodification
176. 0015: invoke-static {v1, v0}, LNullsKt;.firstOrSecond:(LString;LString;)LString;
 0018: move-result-object v1
 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate -allowaccessmodification $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
177. 0019: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001b: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 001e: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(java.lang.String[]); }Z -dontobfuscate -allowaccessmodification $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
178. --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000314] NullsKt.main:([Ljava/lang/String;)V
 0000: if-eqz v1, 0011
 0002: const-string v1, "two"
 0004: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0006: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0009: const-string v1, "one"
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0010: return-void
 0011: const-string v1, "args"
 0013: invoke-static {v1}, Lkotlin/jvm/internal/Intrinsics;.throwParameterIsNullException:(…)V
 0016: const/4 v1, #int 0
 0017: throw v1
 
 [000354] kotlin.jvm.internal.Intrinsics.throwParameterIsNullException:(Ljava/lang/String;)V
 0000: (lots of bytecodes…)
179. --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000314] NullsKt.main:([Ljava/lang/String;)V
 0000: if-eqz v1, 0011
 0002: const-string v1, "two"
 0004: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0006: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0009: const-string v1, "one"
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0010: return-void
 0011: const-string v1, "args"
 0013: invoke-static {v1}, Lkotlin/jvm/internal/Intrinsics;.throwParameterIsNullException:(…)V
 0016: const/4 v1, #int 0
 0017: throw v1
 
 [000354] kotlin.jvm.internal.Intrinsics.throwParameterIsNullException:(Ljava/lang/String;)V
 0000: (lots of bytecodes…)
180. --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000314] NullsKt.main:([Ljava/lang/String;)V
 0000: if-eqz v1, 0011
 0002: const-string v1, "two"
 0004: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0006: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0009: const-string v1, "one"
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0010: return-void
 0011: const-string v1, "args"
 0013: invoke-static {v1}, Lkotlin/jvm/internal/Intrinsics;.throwParameterIsNullException:(…)V
 0016: const/4 v1, #int 0
 0017: throw v1
 
 [000354] kotlin.jvm.internal.Intrinsics.throwParameterIsNullException:(Ljava/lang/String;)V
 0000: (lots of bytecodes…)
181. --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000314] NullsKt.main:([Ljava/lang/String;)V
 0000: if-eqz v1, 0011
 0002: const-string v1, "two"
 0004: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0006: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0009: const-string v1, "one"
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0010: return-void
 0011: const-string v1, "args"
 0013: invoke-static {v1}, Lkotlin/jvm/internal/Intrinsics;.throwParameterIsNullException:(…)V
 0016: const/4 v1, #int 0
 0017: throw v1
 
 [000354] kotlin.jvm.internal.Intrinsics.throwParameterIsNullException:(Ljava/lang/String;)V
 0000: (lots of bytecodes…)
182. --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000314] NullsKt.main:([Ljava/lang/String;)V
 0000: if-eqz v1, 0011
 0002: const-string v1, "two"
 0004: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0006: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0009: const-string v1, "one"
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0010: return-void
 0011: const-string v1, "args"
 0013: invoke-static {v1}, Lkotlin/jvm/internal/Intrinsics;.throwParameterIsNullException:(…)V
 0016: const/4 v1, #int 0
 0017: throw v1
 
 [000354] kotlin.jvm.internal.Intrinsics.throwParameterIsNullException:(Ljava/lang/String;)V
 0000: (lots of bytecodes…)
183. --release \
 --output . \
 --pg-conf rules.txt \
 *.class kotlin-stdlib-1.2.61.jar
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000314] NullsKt.main:([Ljava/lang/String;)V
 0000: if-eqz v1, 0011
 0002: const-string v1, "two"
 0004: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0006: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0009: const-string v1, "one"
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(Ljava/lang/Object;)V
 0010: return-void
 0011: const-string v1, "args"
 0013: invoke-static {v1}, Lkotlin/jvm/internal/Intrinsics;.throwParameterIsNullException:(…)V
 0016: const/4 v1, #int 0
 0017: throw v1
 
 [000354] kotlin.jvm.internal.Intrinsics.throwParameterIsNullException:(Ljava/lang/String;)V
 0000: (lots of bytecodes…)
184. $ cat SdkIntSimple.java
185. $ cat SdkIntSimple.java import android.os.Build; class SdkIntSimple { public static void main(String... args) { if (Build.VERSION.SDK_INT >= 21) { System.out.println("21+"); } else if (Build.VERSION.SDK_INT >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); } } }
186. $ cat SdkIntSimple.java import android.os.Build; class SdkIntSimple { public static void main(String... args) { if (Build.VERSION.SDK_INT >= 21) { System.out.println("21+"); } else if (Build.VERSION.SDK_INT >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z $ javac -bootclasspath $ANDROID_HOME/platforms/android-28/android.jar *.java
187. class SdkIntSimple { public static void main(String... args) { if (Build.VERSION.SDK_INT >= 21) { System.out.println("21+"); } else if (Build.VERSION.SDK_INT >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z $ javac -bootclasspath $ANDROID_HOME/platforms/android-28/android.jar *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
188. public static void main(String... args) { if (Build.VERSION.SDK_INT >= 21) { System.out.println("21+"); } else if (Build.VERSION.SDK_INT >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z $ javac -bootclasspath $ANDROID_HOME/platforms/android-28/android.jar *.java $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
189. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
190. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
191. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
192. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
193. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
194. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
195. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
196. $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000170] SdkIntSimple.main:([Ljava/lang/String;)V
 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v0, #int 21
 0004: if-lt v1, v0, 000e
 0006: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0008: const-string v0, "21+"
 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
 
 $ cat rules.txt
197. 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
198. 000a: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 000d: goto 0023
 000e: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I
 0010: const/16 v0, #int 16
 0012: if-lt v1, v0, 001c
 0014: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 0016: const-string v0, "16+"
 0018: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
199. 001b: goto 0023
 001c: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream;
 001e: const-string v0, "Pre-16"
 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
200. 0020: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V
 0023: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
201. public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000130] SdkIntSimple.main:([Ljava/lang/String;)V 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I 0002: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream; 0004: const-string v0, "21+" 0006: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V 0009: return-void
202. public static void main(...);
 } 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000130] SdkIntSimple.main:([Ljava/lang/String;)V 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I 0002: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream; 0004: const-string v0, "21+" 0006: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V 0009: return-void
203. public static void main(...);
 } 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000130] SdkIntSimple.main:([Ljava/lang/String;)V 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I 0002: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream; 0004: const-string v0, "21+" 0006: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V 0009: return-void
204. public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [000130] SdkIntSimple.main:([Ljava/lang/String;)V 0000: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I 0002: sget-object v1, Ljava/lang/System;.out:Ljava/io/PrintStream; 0004: const-string v0, "21+" 0006: invoke-virtual {v1, v0}, Ljava/io/PrintStream;.println:(Ljava/lang/String;)V 0009: return-void
205. class SdkIntSimple { public static void main(String... args) { if (Build.VERSION.SDK_INT >= 21) { System.out.println("21+"); } else if (Build.VERSION.SDK_INT >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z
206. class SdkIntSimple { public static void main(String... args) { if (Build.VERSION.SDK_INT >= 21) { System.out.println("21+"); } else if (Build.VERSION.SDK_INT >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }
207. Build.VERSION.SDK_INT Build.VERSION.SDK_INT class SdkIntSimple { public static void main(String... args) { if ([21..2147483647] >= 21) { System.out.println("21+"); } else if ([21..2147483647] >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
208. class SdkIntSimple { public static void main(String... args) { if ([21..2147483647] >= 21) { System.out.println("21+"); } else if ([21..2147483647] >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
209. class SdkIntSimple { public static void main(String... args) { if (true) { System.out.println("21+"); } else if ([21..2147483647] >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
210. class SdkIntSimple { public static void main(String... args) { if (true) { System.out.println("21+"); } else if ([21..2147483647] >= 16) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
211. class SdkIntSimple { public static void main(String... args) { if (true) { System.out.println("21+"); } else if (true) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
212. class SdkIntSimple { public static void main(String... args) { if (true) { System.out.println("21+"); } else if (true) { System.out.println("16+"); } else { System.out.println("Pre-16"); }X }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
213. class SdkIntSimple { public static void main(String... args) { System.out.println("21+"); }Y }Z -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }G
214. class ViewCompat { static void postOnAnimation(@NonNull View view, Runnable action) { if (Build.VERSION.SDK_INT >= 16) { view.postOnAnimation(action); } else { view.postDelayed(action, ValueAnimator.getFrameDelay()); } } static void postInvalidateOnAnimation(@NonNull View view) { if (Build.VERSION.SDK_INT >= 16) { view.postInvalidateOnAnimation(); } else { view.postInvalidate(); } } }Z
215. class ViewCompat { static int getPaddingStart(@NonNull View view) { if (Build.VERSION.SDK_INT >= 17) { return view.getPaddingStart(); } return view.getPaddingLeft(); } static int getPaddingEnd(@NonNull View view) { if (Build.VERSION.SDK_INT >= 17) { return view.getPaddingEnd(); } return view.getPaddingRight(); } }Z
216. class ViewCompat { public static boolean isInLayout(@NonNull View view) { if (Build.VERSION.SDK_INT >= 18) { return view.isInLayout(); } return false; } public static boolean isLaidOut(@NonNull View view) { if (Build.VERSION.SDK_INT >= 19) { return view.isLaidOut(); } return view.getWidth() > 0 && view.getHeight() > 0; } }Z
217. class ViewCompat { static void setElevation(@NonNull View view, float elevation) { if (Build.VERSION.SDK_INT >= 21) { view.setElevation(elevation); } } static float getElevation(@NonNull View view) { if (Build.VERSION.SDK_INT >= 21) { return view.getElevation(); } return 0f; } }Z
218. class ViewCompat { static int getMinimumWidth(@NonNull View view) { if (Build.VERSION.SDK_INT >= 16) { return view.getMinimumWidth(); } if (!sMinWidthFieldFetched) { try { sMinWidthField = View.class.getDeclaredField("mMinWidth"); sMinWidthField.setAccessible(true); } catch (NoSuchFieldException e) {} sMinWidthFieldFetched = true; } if (sMinWidthField != null) { try { return (int) sMinWidthField.get(view); } catch (Exception e) {} } return 0; } }Z
219. class ViewCompat { static int getMinimumWidth(@NonNull View view) { if (Build.VERSION.SDK_INT >= 16) { return view.getMinimumWidth(); } if (!sMinWidthFieldFetched) { try { sMinWidthField = View.class.getDeclaredField("mMinWidth"); sMinWidthField.setAccessible(true); } catch (NoSuchFieldException e) {} sMinWidthFieldFetched = true; } if (sMinWidthField != null) { try { return (int) sMinWidthField.get(view); } catch (Exception e) {} } return 0; } }Z
220. class DrawableCompat { static Drawable wrap(@NonNull Drawable drawable) { if (Build.VERSION.SDK_INT >= 23) { return drawable; } if (Build.VERSION.SDK_INT >= 21) { if (!(drawable instanceof TintAwareDrawable)) { return new WrappedDrawableApi21(drawable); } return drawable; } if (!(drawable instanceof TintAwareDrawable)) { return new WrappedDrawableApi14(drawable); } return drawable; } }Z
221. class DrawableCompat { static Drawable wrap(@NonNull Drawable drawable) { if (Build.VERSION.SDK_INT >= 23) { return drawable; } if (Build.VERSION.SDK_INT >= 21) { if (!(drawable instanceof TintAwareDrawable)) { return new WrappedDrawableApi21(drawable); } return drawable; } if (!(drawable instanceof TintAwareDrawable)) { return new WrappedDrawableApi14(drawable); } return drawable; } }Z
222. $ grep -r 'SDK_INT' src/main | egrep '( < | <= | > | >= | ==)' | cut -d':' -f1 | cut -d'/' -f4- | sort | uniq -c | sort -r 124 androidx/core/view/accessibility/AccessibilityNodeInfoCompat.java 103 androidx/core/view/ViewCompat.java 65 androidx/core/app/NotificationCompat.java 30 androidx/core/widget/TextViewCompat.java 25 androidx/core/text/PrecomputedTextCompat.java 23 androidx/core/content/ContextCompat.java 23 androidx/core/app/NotificationCompatBuilder.java 20 androidx/core/view/WindowInsetsCompat.java 20 androidx/core/graphics/drawable/DrawableCompat.java 16 androidx/core/view/accessibility/AccessibilityWindowInfoCompat.java 13 androidx/core/view/MenuItemCompat.java 12 androidx/core/app/ActivityCompat.java 11 androidx/core/view/ViewPropertyAnimatorCompat.java 11 androidx/core/os/BuildCompat.java 11 androidx/core/app/ActivityOptionsCompat.java 10 androidx/core/graphics/drawable/IconCompat.java 9 androidx/core/app/RemoteInput.java 8 androidx/core/view/ViewParentCompat.java 8 androidx/core/view/MarginLayoutParamsCompat.java 7 androidx/core/widget/PopupWindowCompat.java 6 androidx/core/widget/ImageViewCompat.java 6 androidx/core/view/accessibility/AccessibilityEventCompat.java 6 androidx/core/view/ViewConfigurationCompat.java 6 androidx/core/view/DisplayCutoutCompat.java 5 androidx/core/widget/CompoundButtonCompat.java 5 androidx/core/view/accessibility/AccessibilityRecordCompat.java 5 androidx/core/view/ViewGroupCompat.java 5 androidx/core/os/HandlerCompat.java 5 androidx/core/content/res/ResourcesCompat.java 5 androidx/core/app/NotificationManagerCompat.java
223. $ cat SdkIntElevation.java
224. $ cat SdkIntElevation.java import static android.os.Build.VERSION.SDK_INT; import android.view.View; class SdkIntElevation { public static void main(String... args) { View view = new View(null); setElevation(view, 8f); System.out.println(getElevation(view)); }A public static void setElevation(View view, float elevation) { if (SDK_INT >= 21) view.setElevation(elevation); }X public static float getElevation(View view) { return SDK_INT >= 21 ? view.getElevation() : 0f; }Y }Z
225. $ cat SdkIntElevation.java import static android.os.Build.VERSION.SDK_INT; import android.view.View; class SdkIntElevation { public static void main(String... args) { View view = new View(null); setElevation(view, 8f); System.out.println(getElevation(view)); }A public static void setElevation(View view, float elevation) { if (SDK_INT >= 21) view.setElevation(elevation); }X public static float getElevation(View view) { return SDK_INT >= 21 ? view.getElevation() : 0f; }Y }Z
 
 $ javac -bootclasspath $ANDROID_HOME/platforms/android-28/android.jar *.java
226. View view = new View(null); setElevation(view, 8f); System.out.println(getElevation(view)); }A public static void setElevation(View view, float elevation) { if (SDK_INT >= 21) view.setElevation(elevation); }X public static float getElevation(View view) { return SDK_INT >= 21 ? view.getElevation() : 0f; }Y }Z
 
 $ javac -bootclasspath $ANDROID_HOME/platforms/android-28/android.jar *.java
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
227. System.out.println(getElevation(view)); }A public static void setElevation(View view, float elevation) { if (SDK_INT >= 21) view.setElevation(elevation); }X public static float getElevation(View view) { return SDK_INT >= 21 ? view.getElevation() : 0f; }Y }Z
 
 $ javac -bootclasspath $ANDROID_HOME/platforms/android-28/android.jar *.java
 
 $ java -jar $R8_HOME/build/libs/d8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
228. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00020c] SdkIntElevation.main:([Ljava/lang/String;)V
 0000: new-instance v1, Landroid/view/View;
 0002: const/4 v0, #int 0
 0003: invoke-direct {v1, v0}, Landroid/view/View;.<init>:(Landroid/content/Context;)V
 0006: const/high16 v0, #int 1090519040
 0008: invoke-static {v1, v0}, LSdkIntElevation;.setElevation:(Landroid/view/View;F)V
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-static {v1}, LSdkIntElevation;.getElevation:(Landroid/view/View;)F
 0010: move-result v1
 0011: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(F)V
 0014: return-void
 
 [0001c8] SdkIntElevation.getElevation:(Landroid/view/View;)F
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 000b
 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0

229. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00020c] SdkIntElevation.main:([Ljava/lang/String;)V
 0000: new-instance v1, Landroid/view/View;
 0002: const/4 v0, #int 0
 0003: invoke-direct {v1, v0}, Landroid/view/View;.<init>:(Landroid/content/Context;)V
 0006: const/high16 v0, #int 1090519040
 0008: invoke-static {v1, v0}, LSdkIntElevation;.setElevation:(Landroid/view/View;F)V
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-static {v1}, LSdkIntElevation;.getElevation:(Landroid/view/View;)F
 0010: move-result v1
 0011: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(F)V
 0014: return-void
 
 [0001c8] SdkIntElevation.getElevation:(Landroid/view/View;)F
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 000b
 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0

230. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00020c] SdkIntElevation.main:([Ljava/lang/String;)V
 0000: new-instance v1, Landroid/view/View;
 0002: const/4 v0, #int 0
 0003: invoke-direct {v1, v0}, Landroid/view/View;.<init>:(Landroid/content/Context;)V
 0006: const/high16 v0, #int 1090519040
 0008: invoke-static {v1, v0}, LSdkIntElevation;.setElevation:(Landroid/view/View;F)V
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-static {v1}, LSdkIntElevation;.getElevation:(Landroid/view/View;)F
 0010: move-result v1
 0011: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(F)V
 0014: return-void
 
 [0001c8] SdkIntElevation.getElevation:(Landroid/view/View;)F
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 000b
 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0

231. *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00020c] SdkIntElevation.main:([Ljava/lang/String;)V
 0000: new-instance v1, Landroid/view/View;
 0002: const/4 v0, #int 0
 0003: invoke-direct {v1, v0}, Landroid/view/View;.<init>:(Landroid/content/Context;)V
 0006: const/high16 v0, #int 1090519040
 0008: invoke-static {v1, v0}, LSdkIntElevation;.setElevation:(Landroid/view/View;F)V
 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-static {v1}, LSdkIntElevation;.getElevation:(Landroid/view/View;)F
 0010: move-result v1
 0011: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(F)V
 0014: return-void
 
 [0001c8] SdkIntElevation.getElevation:(Landroid/view/View;)F
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 000b
 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0

232. 000b: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream;
 000d: invoke-static {v1}, LSdkIntElevation;.getElevation:(Landroid/view/View;)F
 0010: move-result v1
 0011: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(F)V
 0014: return-void
 
 [0001c8] SdkIntElevation.getElevation:(Landroid/view/View;)F
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 000b
 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0
 000c: return v2
 
 [000248] SdkIntElevation.setElevation:(Landroid/view/View;F)V
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 0009
 0006: invoke-virtual {v2, v3}, Landroid/view/View;.setElevation:(F)V
 0009: return-void
233. 0010: move-result v1
 0011: invoke-virtual {v0, v1}, Ljava/io/PrintStream;.println:(F)V
 0014: return-void
 
 [0001c8] SdkIntElevation.getElevation:(Landroid/view/View;)F
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 000b
 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0
 000c: return v2
 
 [000248] SdkIntElevation.setElevation:(Landroid/view/View;F)V
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 0009
 0006: invoke-virtual {v2, v3}, Landroid/view/View;.setElevation:(F)V
 0009: return-void
 
 $ cat rules.txt
234. 0006: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F
 0009: move-result v2
 000a: goto 000c
 000b: const/4 v2, #int 0
 000c: return v2
 
 [000248] SdkIntElevation.setElevation:(Landroid/view/View;F)V
 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 0009
 0006: invoke-virtual {v2, v3}, Landroid/view/View;.setElevation:(F)V
 0009: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
235. 0000: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I
 0002: const/16 v1, #int 21
 0004: if-lt v0, v1, 0009
 0006: invoke-virtual {v2, v3}, Landroid/view/View;.setElevation:(F)V
 0009: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
236. 0004: if-lt v0, v1, 0009
 0006: invoke-virtual {v2, v3}, Landroid/view/View;.setElevation:(F)V
 0009: return-void
 
 $ cat rules.txt -keepclasseswithmembers class * { public static void main(...);
 }B 
 -assumevalues class android.os.Build$VERSION { int SDK_INT return 21..2147483647; }A
 
 $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex
237. $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00017c] SdkIntElevation.main:([Ljava/lang/String;)V 0000: new-instance v2, Landroid/view/View; 0002: const/4 v0, #int 0 0003: invoke-direct {v2, v0}, Landroid/view/View;.<init>:(Landroid/content/Context;)V 0006: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I 0008: const/high16 v0, #int 1090519040 000a: invoke-virtual {v2, v0}, Landroid/view/View;.setElevation:(F)V 000d: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream; 000f: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I 0011: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F 0014: move-result v2 0015: invoke-virtual {v0, v2}, Ljava/io/PrintStream;.println:(F)V 0018: return-void
238. $ java -jar $R8_HOME/build/libs/r8.jar \
 --lib $ANDROID_HOME/platforms/android-28/android.jar \
 --release \
 --output . \
 --pg-conf rules.txt \
 *.class
 
 $ $ANDROID_HOME/build-tools/28.0.2/dexdump -d classes.dex [00017c] SdkIntElevation.main:([Ljava/lang/String;)V 0000: new-instance v2, Landroid/view/View; 0002: const/4 v0, #int 0 0003: invoke-direct {v2, v0}, Landroid/view/View;.<init>:(Landroid/content/Context;)V 0006: sget v0, Landroid/os/Build$VERSION;.SDK_INT:I 0008: const/high16 v0, #int 1090519040 000a: invoke-virtual {v2, v0}, Landroid/view/View;.setElevation:(F)V 000d: sget-object v0, Ljava/lang/System;.out:Ljava/io/PrintStream; 000f: sget v1, Landroid/os/Build$VERSION;.SDK_INT:I 0011: invoke-virtual {v2}, Landroid/view/View;.getElevation:()F 0014: move-result v2 0015: invoke-virtual {v0, v2}, Ljava/io/PrintStream;.println:(F)V 0018: return-void
239. $ grep -r 'SDK_INT' src/main | egrep '( < | <= | > | >= | ==)' | cut -d':' -f1 | cut -d'/' -f4- | sort | uniq -c | sort -r 124 androidx/core/view/accessibility/AccessibilityNodeInfoCompat.java 103 androidx/core/view/ViewCompat.java 65 androidx/core/app/NotificationCompat.java 30 androidx/core/widget/TextViewCompat.java 25 androidx/core/text/PrecomputedTextCompat.java 23 androidx/core/content/ContextCompat.java 23 androidx/core/app/NotificationCompatBuilder.java 20 androidx/core/view/WindowInsetsCompat.java 20 androidx/core/graphics/drawable/DrawableCompat.java 16 androidx/core/view/accessibility/AccessibilityWindowInfoCompat.java 13 androidx/core/view/MenuItemCompat.java 12 androidx/core/app/ActivityCompat.java 11 androidx/core/view/ViewPropertyAnimatorCompat.java 11 androidx/core/os/BuildCompat.java 11 androidx/core/app/ActivityOptionsCompat.java 10 androidx/core/graphics/drawable/IconCompat.java 9 androidx/core/app/RemoteInput.java 8 androidx/core/view/ViewParentCompat.java 8 androidx/core/view/MarginLayoutParamsCompat.java 7 androidx/core/widget/PopupWindowCompat.java 6 androidx/core/widget/ImageViewCompat.java 6 androidx/core/view/accessibility/AccessibilityEventCompat.java 6 androidx/core/view/ViewConfigurationCompat.java 6 androidx/core/view/DisplayCutoutCompat.java 5 androidx/core/widget/CompoundButtonCompat.java 5 androidx/core/view/accessibility/AccessibilityRecordCompat.java 5 androidx/core/view/ViewGroupCompat.java 5 androidx/core/os/HandlerCompat.java 5 androidx/core/content/res/ResourcesCompat.java 5 androidx/core/app/NotificationManagerCompat.java
240. $ cat gradle.properties
241. $ cat gradle.properties
 
 # Use R8 instead of ProGuard for code shrinking. android.enableR8=true
254. https://jakes.link/java-bytecode
255. DIGGING INTO D8 AND R8 @JakeWharton