Add KClass.isValue to kotlin-reflect

#KT-44782 Fixed

compiler/testData/codegen/box/reflection/modifiers/classes.kt

@@ -1,4 +1,5 @@
 // TARGET_BACKEND: JVM
+// IGNORE_BACKEND_FIR: JVM_IR
 // WITH_REFLECT
 // FILE: box.kt
 
@@ -13,6 +14,9 @@ sealed class S {
     fun interface FunInterface { fun invoke() }
 }
 
+@JvmInline
+value class V(val value: String)
+
 fun box(): String {
     assertTrue(S::class.isSealed)
     assertFalse(S::class.isFinal)
@@ -22,42 +26,56 @@ fun box(): String {
     assertFalse(S::class.isInner)
     assertFalse(S::class.isCompanion)
     assertFalse(S::class.isFun)
+    assertFalse(S::class.isValue)
 
     assertFalse(S.DataClass::class.isSealed)
     assertTrue(S.DataClass::class.isData)
     assertFalse(S.DataClass::class.isInner)
     assertFalse(S.DataClass::class.isCompanion)
     assertFalse(S.DataClass::class.isFun)
+    assertFalse(S.DataClass::class.isValue)
 
     assertFalse(S.InnerClass::class.isSealed)
     assertFalse(S.InnerClass::class.isData)
     assertTrue(S.InnerClass::class.isInner)
     assertFalse(S.InnerClass::class.isCompanion)
     assertFalse(S.InnerClass::class.isFun)
+    assertFalse(S.InnerClass::class.isValue)
 
     assertFalse(S.Companion::class.isSealed)
     assertFalse(S.Companion::class.isData)
     assertFalse(S.Companion::class.isInner)
     assertTrue(S.Companion::class.isCompanion)
     assertFalse(S.Companion::class.isFun)
+    assertFalse(S.Companion::class.isValue)
 
     assertFalse(S.NonCompanionObject::class.isSealed)
     assertFalse(S.NonCompanionObject::class.isData)
     assertFalse(S.NonCompanionObject::class.isInner)
     assertFalse(S.NonCompanionObject::class.isCompanion)
     assertFalse(S.NonCompanionObject::class.isFun)
+    assertFalse(S.NonCompanionObject::class.isValue)
 
     assertFalse(S.FunInterface::class.isSealed)
     assertFalse(S.FunInterface::class.isData)
     assertFalse(S.FunInterface::class.isInner)
     assertFalse(S.FunInterface::class.isCompanion)
     assertTrue(S.FunInterface::class.isFun)
+    assertFalse(S.FunInterface::class.isValue)
 
     assertFalse(JavaInterface::class.isSealed)
     assertFalse(JavaInterface::class.isData)
     assertFalse(JavaInterface::class.isInner)
     assertFalse(JavaInterface::class.isCompanion)
     assertFalse(JavaInterface::class.isFun)
+    assertFalse(JavaInterface::class.isValue)
+
+    assertFalse(V::class.isSealed)
+    assertFalse(V::class.isData)
+    assertFalse(V::class.isInner)
+    assertFalse(V::class.isCompanion)
+    assertFalse(V::class.isFun)
+    assertTrue(V::class.isValue)
 
     return "OK"
 }

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt

@@ -285,6 +285,10 @@ internal class KClassImpl<T : Any>(
     override val isFun: Boolean
         get() = descriptor.isFun
 
+    @Suppress("NOTHING_TO_OVERRIDE") // Temporary workaround for the JPS build until bootstrap
+    override val isValue: Boolean
+        get() = descriptor.isValue
+
     override fun equals(other: Any?): Boolean =
         other is KClassImpl<*> && javaObjectType == other.javaObjectType
 

libraries/stdlib/jvm/runtime/kotlin/jvm/internal/ClassReference.kt

@@ -81,6 +81,10 @@ public class ClassReference(override val jClass: Class<*>) : KClass<Any>, ClassB
     override val isFun: Boolean
         get() = error()
 
+    @SinceKotlin("1.5")
+    override val isValue: Boolean
+        get() = error()
+
     private fun error(): Nothing = throw KotlinReflectionNotSupportedError()
 
     override fun equals(other: Any?) =

libraries/stdlib/jvm/src/kotlin/reflect/KClass.kt

@@ -133,6 +133,12 @@ public actual interface KClass<T : Any> : KDeclarationContainer, KAnnotatedEleme
     @SinceKotlin("1.4")
     public val isFun: Boolean
 
+    /**
+     * `true` if this class is a value class.
+     */
+    @SinceKotlin("1.5")
+    public val isValue: Boolean
+
     /**
      * Returns `true` if this [KClass] instance represents the same Kotlin class as the class represented by [other].
      * On JVM this means that all of the following conditions are satisfied:

libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt

@@ -3521,6 +3521,7 @@ public final class kotlin/jvm/internal/ClassReference : kotlin/jvm/internal/Clas
 	public fun isInstance (Ljava/lang/Object;)Z
 	public fun isOpen ()Z
 	public fun isSealed ()Z
+	public fun isValue ()Z
 	public fun toString ()Ljava/lang/String;
 }
 
@@ -4663,6 +4664,7 @@ public abstract interface class kotlin/reflect/KClass : kotlin/reflect/KAnnotate
 	public abstract fun isInstance (Ljava/lang/Object;)Z
 	public abstract fun isOpen ()Z
 	public abstract fun isSealed ()Z
+	public abstract fun isValue ()Z
 }
 
 public final class kotlin/reflect/KClasses {