[JS IR] Make Char a value class (again)

#KT-35100 Fixed

libraries/stdlib/api/js-v1/kotlin.kt

@@ -1064,7 +1064,7 @@ public final class ByteArray {
     public final operator fun set(index: kotlin.Int, value: kotlin.Byte): kotlin.Unit
 }
 
-public final class Char : kotlin.Comparable<kotlin.Char> {
+/*∆*/ public final class Char : kotlin.Comparable<kotlin.Char> {
     public open override operator fun compareTo(other: kotlin.Char): kotlin.Int
 
     public final operator fun dec(): kotlin.Char

libraries/stdlib/api/js/kotlin.kt

@@ -1032,7 +1032,7 @@ public final class ByteArray {
     public final operator fun set(index: kotlin.Int, value: kotlin.Byte): kotlin.Unit
 }
 
-public final class Char : kotlin.Comparable<kotlin.Char> {
+/*∆*/ public final inline class Char : kotlin.Comparable<kotlin.Char> {
 /*∆*/     @kotlin.SinceKotlin(version = "1.5")
 /*∆*/     @kotlin.WasExperimental(markerClass = {kotlin.ExperimentalStdlibApi::class})
 /*∆*/     public constructor Char(code: kotlin.UShort)

libraries/stdlib/js-ir/builtins/Char.kt

@@ -9,13 +9,13 @@ package kotlin
  * Represents a 16-bit Unicode character.
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `char`.
  */
-// TODO: KT-35100
-//public inline class Char internal constructor (val value: Int) : Comparable<Char> {
-public class Char
-@SinceKotlin("1.5")
-@WasExperimental(ExperimentalStdlibApi::class)
-constructor(code: UShort) : Comparable<Char> {
-    private val value: Int = code.toInt()
+public value class Char
+@kotlin.internal.LowPriorityInOverloadResolution
+internal constructor(private val value: Int) : Comparable<Char> {
+
+    @SinceKotlin("1.5")
+    @WasExperimental(ExperimentalStdlibApi::class)
+    public constructor(code: UShort) : this(code.toInt())
 
     /**
      * Compares this value with the specified value for order.
@@ -76,16 +76,6 @@ constructor(code: UShort) : Comparable<Char> {
     @DeprecatedSinceKotlin(warningSince = "1.5")
     public fun toDouble(): Double = value.toDouble()
 
-    override fun equals(other: Any?): Boolean {
-        @Suppress("IMPLICIT_BOXING_IN_IDENTITY_EQUALS")
-        if (other === this) return true
-        if (other !is Char) return false
-
-        return this.value == other.value
-    }
-
-    override fun hashCode(): Int = value
-
     // TODO implicit usages of toString and valueOf must be covered in DCE
     @Suppress("JS_NAME_PROHIBITED_FOR_OVERRIDE")
     @JsName("toString")

libraries/stdlib/js-ir/runtime/arrays.kt

@@ -34,8 +34,7 @@ internal fun booleanArray(size: Int): BooleanArray = withType("BooleanArray", fi
 
 internal fun booleanArrayOf(arr: Array<Boolean>): BooleanArray = withType("BooleanArray", arr.asDynamic().slice()).unsafeCast<BooleanArray>()
 
-//internal fun charArray(size: Int): CharArray = withType("CharArray", fillArrayVal(Array<Int>(size), 0)).unsafeCast<CharArray>()
-internal fun charArray(size: Int): CharArray = withType("CharArray", fillArrayVal(Array<Char>(size), Char(0))).unsafeCast<CharArray>()
+internal fun charArray(size: Int): CharArray = withType("CharArray", fillArrayVal(Array<Int>(size), 0)).unsafeCast<CharArray>()
 
 internal fun charArrayOf(arr: Array<Char>): CharArray = withType("CharArray", arr.asDynamic().slice()).unsafeCast<CharArray>()