JVM_IR: generate "safe" names for functions in init blocks

compiler/testData/codegen/box/closures/localFunctionInInitBlock.kt

@@ -0,0 +1,28 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+
+lateinit var result1: String
+lateinit var result2: String
+
+class Test(val x: String) {
+    fun test(a: String) {
+        if (result1 != a) throw AssertionError("result1: $result1")
+        result2 = a
+    }
+
+    init {
+        fun test() {
+            fun test1() {
+                result1 = x
+            }
+            test1()
+        }
+        test()
+    }
+}
+
+fun box(): String {
+    val t = Test("OK")
+    t.test("OK")
+
+    return result2
+}

compiler/testData/codegen/bytecodeListing/localFunctionInInitBlock.kt

@@ -0,0 +1,23 @@
+class C() {
+    constructor(x: Int): this() {
+        fun test() {
+            fun test() {}
+        }
+    }
+
+    constructor(y: String): this() {
+        fun test() {
+            fun test() {}
+        }
+    }
+
+    fun test() {
+        fun test() {}
+    }
+
+    init {
+        fun test() {
+            fun test() {}
+        }
+    }
+}

compiler/testData/codegen/bytecodeListing/localFunctionInInitBlock.txt

@@ -0,0 +1,87 @@
+@kotlin.Metadata
+final class C$1$1 {
+    public final static field INSTANCE: C$1$1
+    inner (anonymous) class C$1
+    inner (anonymous) class C$1$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+final class C$1 {
+    public final static field INSTANCE: C$1
+    inner (anonymous) class C$1
+    inner (anonymous) class C$1$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+final class C$2$1 {
+    public final static field INSTANCE: C$2$1
+    inner (anonymous) class C$2
+    inner (anonymous) class C$2$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+final class C$2 {
+    public final static field INSTANCE: C$2
+    inner (anonymous) class C$2
+    inner (anonymous) class C$2$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+final class C$3$1 {
+    public final static field INSTANCE: C$3$1
+    inner (anonymous) class C$3
+    inner (anonymous) class C$3$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+final class C$3 {
+    public final static field INSTANCE: C$3
+    inner (anonymous) class C$3
+    inner (anonymous) class C$3$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+final class C$test$1 {
+    public final static field INSTANCE: C$test$1
+    inner (anonymous) class C$test$1
+    static method <clinit>(): void
+    method <init>(): void
+    public synthetic bridge method invoke(): java.lang.Object
+    public final method invoke(): void
+}
+
+@kotlin.Metadata
+public final class C {
+    inner (anonymous) class C$1
+    inner (anonymous) class C$2
+    inner (anonymous) class C$3
+    inner (anonymous) class C$test$1
+    public method <init>(): void
+    public method <init>(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
+    public method <init>(p0: int): void
+    public final method test(): void
+}

compiler/testData/codegen/bytecodeListing/localFunctionInInitBlock_ir.txt

@@ -0,0 +1,14 @@
+@kotlin.Metadata
+public final class C {
+    public method <init>(): void
+    public method <init>(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
+    public method <init>(p0: int): void
+    private final static method _init_$test-0$test(): void
+    private final static method _init_$test-0(): void
+    private final static method _init_$test-2$test-1(): void
+    private final static method _init_$test-2(): void
+    private final static method _init_$test-5(): void
+    private final static method test$test-3(): void
+    public final method test(): void
+    private final static method test-5$test-4(): void
+}