Closed
Description
The class class Foo(val bits: Long) extends AnyVal produces the following bytecode:
In `scalac`
public final boolean equals$extension(long, java.lang.Object);
Code:
0: aload_3
1: astore 4
3: aload 4
5: instanceof #31 // class Foo
8: ifeq 17
11: iconst_1
12: istore 5
14: goto 20
17: iconst_0
18: istore 5
20: iload 5
22: ifeq 53
25: aload_3
26: checkcast #31 // class Foo
29: invokevirtual #35 // Method Foo.bits:()J
32: lstore 6
34: lload_1
35: lload 6
37: lcmp
38: ifne 45
41: iconst_1
42: goto 46
45: iconst_0
46: ifeq 53
49: iconst_1
50: goto 54
53: iconst_0
54: ireturn
In `dotty`
public final boolean equals$extension(long, java.lang.Object);
Code:
0: aload_3
1: astore 4
3: aload 4
5: instanceof #34 // class Foo
8: ifeq 77
11: aload 4
13: ifnonnull 23
16: aconst_null
17: invokestatic #38 // Method scala/runtime/BoxesRunTime.unboxToLong:(Ljava/lang/Object;)J
20: goto 31
23: aload 4
25: checkcast #34 // class Foo
28: invokevirtual #42 // Method Foo.bits:()J
31: lstore 5
33: lload 5
35: lstore 7
37: lload_1
38: invokestatic #24 // Method scala/runtime/BoxesRunTime.boxToLong:(J)Ljava/lang/Long;
41: lload 7
43: invokestatic #24 // Method scala/runtime/BoxesRunTime.boxToLong:(J)Ljava/lang/Long;
46: astore 9
48: dup
49: ifnonnull 61
52: pop
53: aload 9
55: ifnull 69
58: goto 73
61: aload 9
63: invokevirtual #46 // Method java/lang/Object.equals:(Ljava/lang/Object;)Z
66: ifeq 73
69: iconst_1
70: goto 74
73: iconst_0
74: goto 106
77: aload 4
79: instanceof #4 // class java/lang/Object
82: ifeq 96
85: aload 4
87: checkcast #4 // class java/lang/Object
90: astore 10
92: iconst_0
93: goto 106
96: new #48 // class scala/MatchError
99: dup
100: aload 4
102: invokespecial #51 // Method scala/MatchError."":(Ljava/lang/Object;)V
105: athrow
106: ireturn