FIR: implement FE1.0-matching ILT approximation during inference

#KT-51357 Fixed

compiler/fir/providers/src/org/jetbrains/kotlin/fir/declarations/InlineClassesUtils.kt

@@ -20,7 +20,9 @@ import org.jetbrains.kotlin.types.model.typeConstructor
 
 internal fun ConeKotlinType.substitutedUnderlyingTypeForInlineClass(session: FirSession, context: ConeTypeContext): ConeKotlinType? {
     val unsubstitutedType = unsubstitutedUnderlyingTypeForInlineClass(session) ?: return null
-    val substitutor = createTypeSubstitutorByTypeConstructor(mapOf(this.typeConstructor(context) to this), context)
+    val substitutor = createTypeSubstitutorByTypeConstructor(
+        mapOf(this.typeConstructor(context) to this), context, approximateIntegerLiterals = true
+    )
     return substitutor.substituteOrNull(unsubstitutedType)
 }
 

compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/substitution/Substitutors.kt

@@ -217,13 +217,18 @@ class ConeSubstitutorByMap(
     override fun hashCode() = hashCode
 }
 
-fun createTypeSubstitutorByTypeConstructor(map: Map<TypeConstructorMarker, ConeKotlinType>, context: ConeTypeContext): ConeSubstitutor {
+fun createTypeSubstitutorByTypeConstructor(
+    map: Map<TypeConstructorMarker, ConeKotlinType>,
+    context: ConeTypeContext,
+    approximateIntegerLiterals: Boolean
+): ConeSubstitutor {
     if (map.isEmpty()) return ConeSubstitutor.Empty
     return object : AbstractConeSubstitutor(context), TypeSubstitutorMarker {
         override fun substituteType(type: ConeKotlinType): ConeKotlinType? {
             if (type !is ConeLookupTagBasedType && type !is ConeStubType) return null
             val new = map[type.typeConstructor(context)] ?: return null
-            return new.approximateIntegerLiteralType().updateNullabilityIfNeeded(type)?.withCombinedAttributesFrom(type)
+            val approximatedIntegerLiteralType = if (approximateIntegerLiterals) new.approximateIntegerLiteralType() else new
+            return approximatedIntegerLiteralType.updateNullabilityIfNeeded(type)?.withCombinedAttributesFrom(type)
         }
     }
 }

compiler/fir/providers/src/org/jetbrains/kotlin/fir/types/ConeInferenceContext.kt

@@ -329,7 +329,9 @@ interface ConeInferenceContext : TypeSystemInferenceExtensionContext, ConeTypeCo
 
     override fun typeSubstitutorByTypeConstructor(map: Map<TypeConstructorMarker, KotlinTypeMarker>): ConeSubstitutor {
         @Suppress("UNCHECKED_CAST")
-        return createTypeSubstitutorByTypeConstructor(map as Map<TypeConstructorMarker, ConeKotlinType>, this)
+        return createTypeSubstitutorByTypeConstructor(
+            map as Map<TypeConstructorMarker, ConeKotlinType>, this, approximateIntegerLiterals = false
+        )
     }
 
     override fun createEmptySubstitutor(): ConeSubstitutor {

compiler/fir/providers/src/org/jetbrains/kotlin/fir/types/TypeUtils.kt

@@ -128,6 +128,7 @@ fun <T : ConeKotlinType> T.withAttributes(attributes: ConeAttributes): T {
         is ConeIntersectionType -> this
         // Attributes for stub types are not supported, and it's not obvious if it should
         is ConeStubType -> this
+        is ConeIntegerLiteralType -> this
         else -> error("Not supported: $this: ${this.render()}")
     } as T
 }