psi2ir: ersatz type approximation for intersection types

Emulate old JVM back-end behavior for intersection type mapping.

IrType renderer should render the IR type, not the original Kotlin type.

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrElement.kt

@@ -22,12 +22,15 @@ import org.jetbrains.kotlin.descriptors.ReceiverParameterDescriptor
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
+import org.jetbrains.kotlin.ir.types.*
+import org.jetbrains.kotlin.ir.types.impl.originalKotlinType
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.renderer.ClassifierNamePolicy
 import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.renderer.DescriptorRendererModifier
 import org.jetbrains.kotlin.renderer.OverrideRenderingPolicy
 import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.types.Variance
 import org.jetbrains.kotlin.utils.addIfNotNull
 
 fun IrElement.render() = accept(RenderIrElementVisitor(), null)
@@ -351,38 +354,84 @@ class RenderIrElementVisitor : IrElementVisitor<String, Nothing?> {
 
     override fun visitErrorCallExpression(expression: IrErrorCallExpression, data: Nothing?): String =
         "ERROR_CALL '${expression.description}' type=${expression.type.render()}"
+}
 
-    companion object {
+private val DECLARATION_RENDERER = DescriptorRenderer.withOptions {
-        val DECLARATION_RENDERER = DescriptorRenderer.withOptions {
+    withDefinedIn = false
-            withDefinedIn = false
+    overrideRenderingPolicy = OverrideRenderingPolicy.RENDER_OPEN_OVERRIDE
-            overrideRenderingPolicy = OverrideRenderingPolicy.RENDER_OPEN_OVERRIDE
+    includePropertyConstant = true
-            includePropertyConstant = true
+    classifierNamePolicy = ClassifierNamePolicy.FULLY_QUALIFIED
-            classifierNamePolicy = ClassifierNamePolicy.FULLY_QUALIFIED
+    verbose = false
-            verbose = false
+    modifiers = DescriptorRendererModifier.ALL
-            modifiers = DescriptorRendererModifier.ALL
+}
+
+private val REFERENCE_RENDERER = DescriptorRenderer.ONLY_NAMES_WITH_SHORT_TYPES
+
+internal fun IrDeclaration.name(): String =
+    descriptor.name.toString()
+
+internal fun DescriptorRenderer.renderDescriptor(descriptor: DeclarationDescriptor): String =
+    if (descriptor is ReceiverParameterDescriptor)
+        "this@${descriptor.containingDeclaration.name}: ${descriptor.type}"
+    else
+        render(descriptor)
+
+internal fun IrDeclaration.renderDeclared(): String =
+    DECLARATION_RENDERER.renderDescriptor(this.descriptor)
+
+internal fun DeclarationDescriptor.ref(): String =
+    REFERENCE_RENDERER.renderDescriptor(this.original)
+
+internal fun KotlinType.render(): String =
+    DECLARATION_RENDERER.renderType(this)
+
+internal fun IrDeclaration.renderOriginIfNonTrivial(): String =
+    if (origin != IrDeclarationOrigin.DEFINED) origin.toString() + " " else ""
+
+internal fun IrType.renderTypeInner(): String =
+    when (this) {
+        is IrDynamicType -> "dynamic"
+
+        is IrErrorType -> "ERROR"
+
+        is IrSimpleType -> buildString {
+            append(DECLARATION_RENDERER.renderClassifierName(classifier.descriptor)) // TODO get rid of descriptors
+            if (arguments.isNotEmpty()) {
+                append(
+                    arguments.joinToString(prefix = "<", postfix = ">", separator = ", ") {
+                        it.renderTypeArgument()
+                    }
+                )
+            }
+            if (hasQuestionMark) {
+                append('?')
+            }
         }
 
-        val REFERENCE_RENDERER = DescriptorRenderer.ONLY_NAMES_WITH_SHORT_TYPES
+        else ->
-
+            originalKotlinType?.let {
-        internal fun IrDeclaration.name(): String =
+                DECLARATION_RENDERER.renderType(it)
-            descriptor.name.toString()
+            } ?: "IrType without originalKotlinType: $this"
-
-        internal fun DescriptorRenderer.renderDescriptor(descriptor: DeclarationDescriptor): String =
-            if (descriptor is ReceiverParameterDescriptor)
-                "this@${descriptor.containingDeclaration.name}: ${descriptor.type}"
-            else
-                render(descriptor)
-
-        internal fun IrDeclaration.renderDeclared(): String =
-            DECLARATION_RENDERER.renderDescriptor(this.descriptor)
-
-        internal fun DeclarationDescriptor.ref(): String =
-            REFERENCE_RENDERER.renderDescriptor(this.original)
-
-        internal fun KotlinType.render(): String =
-            DECLARATION_RENDERER.renderType(this)
-
-        internal fun IrDeclaration.renderOriginIfNonTrivial(): String =
-            if (origin != IrDeclarationOrigin.DEFINED) origin.toString() + " " else ""
     }
-}
+
+private fun IrTypeArgument.renderTypeArgument(): String =
+    when (this) {
+        is IrStarProjection -> "*"
+
+        is IrTypeProjection -> buildString {
+            append(variance.label)
+            if (variance != Variance.INVARIANT) append(' ')
+            append(type.render())
+        }
+
+        else -> "IrTypeArgument[$this]"
+    }
+
+internal fun renderTypeAnnotations(annotations: List<IrCall>) =
+    if (annotations.isEmpty())
+        ""
+    else
+        annotations.joinToString(prefix = "", postfix = " ", separator = " ") { "@[${it.render()}]" }
+
+fun IrType.render() = "${renderTypeAnnotations(annotations)}${renderTypeInner()}"
+

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/RenderIrType.kt

@@ -1,14 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.ir.util
-
-import org.jetbrains.kotlin.ir.types.IrType
-import org.jetbrains.kotlin.ir.types.impl.originalKotlinType
-
-fun IrType.render() =
-    originalKotlinType?.let {
-        RenderIrElementVisitor.DECLARATION_RENDERER.renderType(it)
-    } ?: "IrType without originalKotlinType: $this"

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/TypeTranslator.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.ir.types.impl.IrErrorTypeImpl
 import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
 import org.jetbrains.kotlin.ir.types.impl.IrStarProjectionImpl
 import org.jetbrains.kotlin.types.*
+import org.jetbrains.kotlin.types.typeUtil.replaceArgumentsWithStarProjections
 import org.jetbrains.kotlin.types.typesApproximation.approximateCapturedTypes
 
 class TypeTranslator(
@@ -33,14 +34,14 @@ class TypeTranslator(
 
     fun enterScope(irElement: IrTypeParametersContainer) {
         typeParametersResolver.enterTypeParameterScope(irElement)
-        if(enterTableScope) {
+        if (enterTableScope) {
             symbolTable.enterScope(irElement.descriptor)
         }
     }
 
     fun leaveScope(irElement: IrTypeParametersContainer) {
         typeParametersResolver.leaveTypeParameterScope()
-        if(enterTableScope) {
+        if (enterTableScope) {
             symbolTable.leaveScope(irElement.descriptor)
         }
     }
@@ -54,43 +55,45 @@ class TypeTranslator(
 
     private fun resolveTypeParameter(typeParameterDescriptor: TypeParameterDescriptor) =
         typeParametersResolver.resolveScopedTypeParameter(typeParameterDescriptor)
-                ?: symbolTable.referenceTypeParameter(typeParameterDescriptor)
+            ?: symbolTable.referenceTypeParameter(typeParameterDescriptor)
 
     fun translateType(ktType: KotlinType): IrType =
         translateType(ktType, Variance.INVARIANT).type
 
-    private fun translateType(ktType0: KotlinType, variance: Variance): IrTypeProjection {
+    private fun translateType(ktType: KotlinType, variance: Variance): IrTypeProjection {
-        // TODO "old" JVM BE does this for reified type arguments. Is it ok for arbitrary subexpressions?
+        val approximatedType = LegacyTypeApproximation().approximate(ktType)
-
-        val ktTypeUpper = ktType0.approximate(languageVersionSettings)
 
         when {
-            ktTypeUpper.isError -> return IrErrorTypeImpl(ktTypeUpper, translateTypeAnnotations(ktTypeUpper.annotations), variance)
+            approximatedType.isError ->
-            ktTypeUpper.isDynamic() -> return IrDynamicTypeImpl(ktTypeUpper, translateTypeAnnotations(ktTypeUpper.annotations), variance)
+                return IrErrorTypeImpl(approximatedType, translateTypeAnnotations(approximatedType.annotations), variance)
-            ktTypeUpper.isFlexible() -> return translateType(ktTypeUpper.upperIfFlexible(), variance)
+            approximatedType.isDynamic() ->
+                return IrDynamicTypeImpl(approximatedType, translateTypeAnnotations(approximatedType.annotations), variance)
+            approximatedType.isFlexible() ->
+                return translateType(approximatedType.upperIfFlexible(), variance)
         }
 
-        val ktTypeConstructor = ktTypeUpper.constructor
+        val ktTypeConstructor = approximatedType.constructor
-        val ktTypeDescriptor = ktTypeConstructor.declarationDescriptor ?: throw AssertionError("No descriptor for type $ktTypeUpper")
+        val ktTypeDescriptor = ktTypeConstructor.declarationDescriptor
+            ?: throw AssertionError("No descriptor for type $approximatedType")
 
         return when (ktTypeDescriptor) {
             is TypeParameterDescriptor ->
                 IrSimpleTypeImpl(
-                    ktTypeUpper,
+                    approximatedType,
                     resolveTypeParameter(ktTypeDescriptor),
-                    ktTypeUpper.isMarkedNullable,
+                    approximatedType.isMarkedNullable,
                     emptyList(),
-                    translateTypeAnnotations(ktTypeUpper.annotations),
+                    translateTypeAnnotations(approximatedType.annotations),
                     variance
                 )
 
             is ClassDescriptor ->
                 IrSimpleTypeImpl(
-                    ktTypeUpper,
+                    approximatedType,
                     symbolTable.referenceClass(ktTypeDescriptor),
-                    ktTypeUpper.isMarkedNullable,
+                    approximatedType.isMarkedNullable,
-                    translateTypeArguments(ktTypeUpper.arguments),
+                    translateTypeArguments(approximatedType.arguments),
-                    translateTypeAnnotations(ktTypeUpper.annotations),
+                    translateTypeAnnotations(approximatedType.annotations),
                     variance
                 )
 
@@ -99,15 +102,36 @@ class TypeTranslator(
         }
     }
 
-    private fun KotlinType.approximate(languageVersionSettings: LanguageVersionSettings): KotlinType {
+    private inner class LegacyTypeApproximation {
-        if (this.constructor.isDenotable) return this
+
+        fun approximate(ktType: KotlinType): KotlinType {
+            val properlyApproximatedType = approximateByKotlinRules(ktType)
+
+            // If there's an intersection type, take the most common supertype of its intermediate supertypes.
+            // That's what old back-end effectively does.
+            val typeConstructor = properlyApproximatedType.constructor
+            if (typeConstructor is IntersectionTypeConstructor) {
+                val commonSupertype = CommonSupertypes.commonSupertype(typeConstructor.supertypes)
+                return approximate(commonSupertype.replaceArgumentsWithStarProjections())
+            }
+
+            // Other types should be approximated properly. Right? Riiight?
+            return properlyApproximatedType
+        }
+
+
+        private fun approximateByKotlinRules(ktType: KotlinType): KotlinType {
+            if (ktType.constructor.isDenotable) return ktType
+
+            return if (languageVersionSettings.supportsFeature(LanguageFeature.NewInference))
+                typeApproximatorForNI.approximateDeclarationType(ktType, local = false, languageVersionSettings = languageVersionSettings)
+            else
+                approximateCapturedTypes(ktType).upper
+        }
 
-        return if (languageVersionSettings.supportsFeature(LanguageFeature.NewInference))
-            typeApproximatorForNI.approximateDeclarationType(this, local = false, languageVersionSettings = languageVersionSettings)
-        else
-            approximateCapturedTypes(this).upper
     }
 
+
     private fun translateTypeAnnotations(annotations: Annotations): List<IrCall> =
         annotations.map(constantValueGenerator::generateAnnotationConstructorCall)
 

compiler/testData/codegen/box/regressions/nestedIntersection.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 // IGNORE_BACKEND: JS_IR
 // TODO: muted automatically, investigate should it be ran for JS or not
 // IGNORE_BACKEND: JS, NATIVE

compiler/testData/ir/irText/types/intersectionType1.kt

@@ -0,0 +1,15 @@
+class In<in I>
+
+fun <S> select(x: S, y: S): S = x
+
+fun <T> foo(a: Array<In<T>>, b: Array<In<String>>) =
+    select(a, b)[0].ofType(true)
+
+inline fun <reified K> In<K>.ofType(y: Any?) =
+    y is K
+
+fun test() {
+    val a1 = arrayOf(In<Int>())
+    val a2 = arrayOf(In<String>())
+    foo(a1, a2)
+}

compiler/testData/ir/irText/types/intersectionType1.txt

@@ -0,0 +1,72 @@
+FILE fqName:<root> fileName:/intersectionType1.kt
+  CLASS CLASS name:In modality:FINAL visibility:public flags: superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:In<I> flags:
+    TYPE_PARAMETER name:I index:0 variance:in superTypes:[kotlin.Any?]
+    CONSTRUCTOR visibility:public <> () returnType:In<I> flags:primary
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
+        INSTANCE_INITIALIZER_CALL classDescriptor='In'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  FUN name:select visibility:public modality:FINAL <S> (x:S, y:S) returnType:S flags:
+    TYPE_PARAMETER name:S index:0 variance: superTypes:[kotlin.Any?]
+    VALUE_PARAMETER name:x index:0 type:S flags:
+    VALUE_PARAMETER name:y index:1 type:S flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='select(S, S): S'
+        GET_VAR 'value-parameter x: S' type=S origin=null
+  FUN name:foo visibility:public modality:FINAL <T> (a:kotlin.Array<In<T>>, b:kotlin.Array<In<kotlin.String>>) returnType:kotlin.Boolean flags:
+    TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any?]
+    VALUE_PARAMETER name:a index:0 type:kotlin.Array<In<T>> flags:
+    VALUE_PARAMETER name:b index:1 type:kotlin.Array<In<kotlin.String>> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='foo(Array<In<T>>, Array<In<String>>): Boolean'
+        CALL 'ofType(Any?) on In<K>: Boolean' type=kotlin.Boolean origin=null
+          <reified K>: kotlin.Any?
+          $receiver: CALL 'get(Int): T' type=In<kotlin.Any?> origin=GET_ARRAY_ELEMENT
+            $this: CALL 'select(S, S): S' type=kotlin.Array<out In<kotlin.Any?>> origin=null
+              <S>: kotlin.Array<out In<kotlin.Any?>>
+              x: GET_VAR 'value-parameter a: Array<In<T>>' type=kotlin.Array<In<T>> origin=null
+              y: GET_VAR 'value-parameter b: Array<In<String>>' type=kotlin.Array<In<kotlin.String>> origin=null
+            index: CONST Int type=kotlin.Int value=0
+          y: CONST Boolean type=kotlin.Boolean value=true
+  FUN name:ofType visibility:public modality:FINAL <K> ($receiver:In<K>, y:kotlin.Any?) returnType:kotlin.Boolean flags:inline
+    TYPE_PARAMETER name:K index:0 variance: superTypes:[kotlin.Any?]
+    $receiver: VALUE_PARAMETER name:<this> type:In<K> flags:
+    VALUE_PARAMETER name:y index:0 type:kotlin.Any? flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='ofType(Any?) on In<K>: Boolean'
+        TYPE_OP type=kotlin.Boolean origin=INSTANCEOF typeOperand=K
+          typeOperand: TYPE_PARAMETER name:K index:0 variance: superTypes:[kotlin.Any?]
+          GET_VAR 'value-parameter y: Any?' type=kotlin.Any? origin=null
+  FUN name:test visibility:public modality:FINAL <> () returnType:kotlin.Unit flags:
+    BLOCK_BODY
+      VAR name:a1 type:kotlin.Array<In<kotlin.Int>> flags:val
+        CALL 'arrayOf(vararg T): Array<T>' type=kotlin.Array<In<kotlin.Int>> origin=null
+          <reified T>: In<kotlin.Int>
+          elements: VARARG type=kotlin.Array<out In<kotlin.Int>> varargElementType=In<kotlin.Int>
+            CALL 'constructor In()' type=In<kotlin.Int> origin=null
+              <in I>: kotlin.Int
+      VAR name:a2 type:kotlin.Array<In<kotlin.String>> flags:val
+        CALL 'arrayOf(vararg T): Array<T>' type=kotlin.Array<In<kotlin.String>> origin=null
+          <reified T>: In<kotlin.String>
+          elements: VARARG type=kotlin.Array<out In<kotlin.String>> varargElementType=In<kotlin.String>
+            CALL 'constructor In()' type=In<kotlin.String> origin=null
+              <in I>: kotlin.String
+      TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
+        typeOperand: CLASS IR_EXTERNAL_DECLARATION_STUB OBJECT name:Unit modality:FINAL visibility:public flags: superTypes:[kotlin.Any]
+        CALL 'foo(Array<In<T>>, Array<In<String>>): Boolean' type=kotlin.Boolean origin=null
+          <T>: kotlin.Int
+          a: GET_VAR 'a1: Array<In<Int>>' type=kotlin.Array<In<kotlin.Int>> origin=null
+          b: GET_VAR 'a2: Array<In<String>>' type=kotlin.Array<In<kotlin.String>> origin=null

compiler/testData/ir/irText/types/intersectionType2.kt

@@ -0,0 +1,16 @@
+interface A<out T>
+interface Foo
+
+open class B : Foo, A<B>
+open class C : Foo, A<C>
+
+fun <T> run(fn: () -> T) = fn()
+
+fun foo() = run {
+    val mm = B()
+    val nn = C()
+
+    val c = if (true) mm else nn
+
+    c
+}

compiler/testData/ir/irText/types/intersectionType2.txt

@@ -0,0 +1,106 @@
+FILE fqName:<root> fileName:/intersectionType2.kt
+  CLASS INTERFACE name:A modality:ABSTRACT visibility:public flags: superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:A<T> flags:
+    TYPE_PARAMETER name:T index:0 variance:out superTypes:[kotlin.Any?]
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS INTERFACE name:Foo modality:ABSTRACT visibility:public flags: superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:Foo flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS CLASS name:B modality:OPEN visibility:public flags: superTypes:[Foo; A<B>]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:B flags:
+    CONSTRUCTOR visibility:public <> () returnType:B flags:primary
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
+        INSTANCE_INITIALIZER_CALL classDescriptor='B'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS CLASS name:C modality:OPEN visibility:public flags: superTypes:[Foo; A<C>]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:C flags:
+    CONSTRUCTOR visibility:public <> () returnType:C flags:primary
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
+        INSTANCE_INITIALIZER_CALL classDescriptor='C'
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  FUN name:run visibility:public modality:FINAL <T> (fn:kotlin.Function0<T>) returnType:T flags:
+    TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any?]
+    VALUE_PARAMETER name:fn index:0 type:kotlin.Function0<T> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='run(() -> T): T'
+        CALL 'invoke(): R' type=T origin=INVOKE
+          $this: GET_VAR 'value-parameter fn: () -> T' type=kotlin.Function0<T> origin=VARIABLE_AS_FUNCTION
+  FUN name:foo visibility:public modality:FINAL <> () returnType:kotlin.Any flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='foo(): Any'
+        CALL 'run(() -> T): T' type=kotlin.Any origin=null
+          <T>: kotlin.Any
+          fn: BLOCK type=kotlin.Function0<kotlin.Any> origin=LAMBDA
+            FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> () returnType:kotlin.Any flags:
+              BLOCK_BODY
+                VAR name:mm type:B flags:val
+                  CALL 'constructor B()' type=B origin=null
+                VAR name:nn type:C flags:val
+                  CALL 'constructor C()' type=C origin=null
+                VAR name:c type:kotlin.Any flags:val
+                  WHEN type=kotlin.Any origin=null
+                    BRANCH
+                      if: CONST Boolean type=kotlin.Boolean value=true
+                      then: GET_VAR 'mm: B' type=B origin=null
+                    BRANCH
+                      if: CONST Boolean type=kotlin.Boolean value=true
+                      then: GET_VAR 'nn: C' type=C origin=null
+                RETURN type=kotlin.Nothing from='<anonymous>(): Any'
+                  GET_VAR 'c: Any' type=kotlin.Any origin=null
+            FUNCTION_REFERENCE '<anonymous>(): Any' type=kotlin.Function0<kotlin.Any> origin=LAMBDA

compiler/testData/ir/irText/types/intersectionType3.kt

@@ -0,0 +1,30 @@
+interface In<in T>
+
+inline fun <reified T> In<T>.isT(): Boolean =
+    this is T
+
+inline fun <reified T> In<T>.asT() { this as T }
+
+fun <S> sel(x: S, y: S): S = x
+
+interface A
+interface B
+
+interface A1 : A
+interface A2 : A
+
+interface Z1 : A, B
+interface Z2 : A, B
+
+
+fun testInIs1(x: In<A>, y: In<B>) = sel(x, y).isT()
+
+fun testInIs2(x: In<Z1>, y: In<Z2>) = sel(x, y).isT()
+
+fun testInIs3(x: In<A1>, y: In<A2>) = sel(x, y).isT()
+
+fun testInAs1(x: In<A>, y: In<B>) = sel(x, y).asT()
+
+fun testInAs2(x: In<Z1>, y: In<Z2>) = sel(x, y).asT()
+
+fun testInAs3(x: In<A1>, y: In<A2>) = sel(x, y).asT()

compiler/testData/ir/irText/types/intersectionType3.txt

@@ -0,0 +1,203 @@
+FILE fqName:<root> fileName:/intersectionType3.kt
+  CLASS INTERFACE name:In modality:ABSTRACT visibility:public flags: superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:In<T> flags:
+    TYPE_PARAMETER name:T index:0 variance:in superTypes:[kotlin.Any?]
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  FUN name:isT visibility:public modality:FINAL <T> ($receiver:In<T>) returnType:kotlin.Boolean flags:inline
+    TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any?]
+    $receiver: VALUE_PARAMETER name:<this> type:In<T> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='isT() on In<T>: Boolean'
+        TYPE_OP type=kotlin.Boolean origin=INSTANCEOF typeOperand=T
+          typeOperand: TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any?]
+          GET_VAR 'this@isT: In<T>' type=In<T> origin=null
+  FUN name:asT visibility:public modality:FINAL <T> ($receiver:In<T>) returnType:kotlin.Unit flags:inline
+    TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any?]
+    $receiver: VALUE_PARAMETER name:<this> type:In<T> flags:
+    BLOCK_BODY
+      TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
+        typeOperand: CLASS IR_EXTERNAL_DECLARATION_STUB OBJECT name:Unit modality:FINAL visibility:public flags: superTypes:[kotlin.Any]
+        TYPE_OP type=T origin=CAST typeOperand=T
+          typeOperand: TYPE_PARAMETER name:T index:0 variance: superTypes:[kotlin.Any?]
+          GET_VAR 'this@asT: In<T>' type=In<T> origin=null
+  FUN name:sel visibility:public modality:FINAL <S> (x:S, y:S) returnType:S flags:
+    TYPE_PARAMETER name:S index:0 variance: superTypes:[kotlin.Any?]
+    VALUE_PARAMETER name:x index:0 type:S flags:
+    VALUE_PARAMETER name:y index:1 type:S flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='sel(S, S): S'
+        GET_VAR 'value-parameter x: S' type=S origin=null
+  CLASS INTERFACE name:A modality:ABSTRACT visibility:public flags: superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:A flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS INTERFACE name:B modality:ABSTRACT visibility:public flags: superTypes:[kotlin.Any]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:B flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN IR_EXTERNAL_DECLARATION_STUB name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS INTERFACE name:A1 modality:ABSTRACT visibility:public flags: superTypes:[A]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:A1 flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS INTERFACE name:A2 modality:ABSTRACT visibility:public flags: superTypes:[A]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:A2 flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS INTERFACE name:Z1 modality:ABSTRACT visibility:public flags: superTypes:[A; B]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:Z1 flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  CLASS INTERFACE name:Z2 modality:ABSTRACT visibility:public flags: superTypes:[A; B]
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:Z2 flags:
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+        FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+        FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      overridden:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+        FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+  FUN name:testInIs1 visibility:public modality:FINAL <> (x:In<A>, y:In<B>) returnType:kotlin.Boolean flags:
+    VALUE_PARAMETER name:x index:0 type:In<A> flags:
+    VALUE_PARAMETER name:y index:1 type:In<B> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='testInIs1(In<A>, In<B>): Boolean'
+        CALL 'isT() on In<T>: Boolean' type=kotlin.Boolean origin=null
+          <reified T>: kotlin.Any
+          $receiver: CALL 'sel(S, S): S' type=In<kotlin.Any> origin=null
+            <S>: In<kotlin.Any>
+            x: GET_VAR 'value-parameter x: In<A>' type=In<A> origin=null
+            y: GET_VAR 'value-parameter y: In<B>' type=In<B> origin=null
+  FUN name:testInIs2 visibility:public modality:FINAL <> (x:In<Z1>, y:In<Z2>) returnType:kotlin.Boolean flags:
+    VALUE_PARAMETER name:x index:0 type:In<Z1> flags:
+    VALUE_PARAMETER name:y index:1 type:In<Z2> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='testInIs2(In<Z1>, In<Z2>): Boolean'
+        CALL 'isT() on In<T>: Boolean' type=kotlin.Boolean origin=null
+          <reified T>: kotlin.Any
+          $receiver: CALL 'sel(S, S): S' type=In<kotlin.Any> origin=null
+            <S>: In<kotlin.Any>
+            x: GET_VAR 'value-parameter x: In<Z1>' type=In<Z1> origin=null
+            y: GET_VAR 'value-parameter y: In<Z2>' type=In<Z2> origin=null
+  FUN name:testInIs3 visibility:public modality:FINAL <> (x:In<A1>, y:In<A2>) returnType:kotlin.Boolean flags:
+    VALUE_PARAMETER name:x index:0 type:In<A1> flags:
+    VALUE_PARAMETER name:y index:1 type:In<A2> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='testInIs3(In<A1>, In<A2>): Boolean'
+        CALL 'isT() on In<T>: Boolean' type=kotlin.Boolean origin=null
+          <reified T>: A
+          $receiver: CALL 'sel(S, S): S' type=In<A> origin=null
+            <S>: In<A>
+            x: GET_VAR 'value-parameter x: In<A1>' type=In<A1> origin=null
+            y: GET_VAR 'value-parameter y: In<A2>' type=In<A2> origin=null
+  FUN name:testInAs1 visibility:public modality:FINAL <> (x:In<A>, y:In<B>) returnType:kotlin.Unit flags:
+    VALUE_PARAMETER name:x index:0 type:In<A> flags:
+    VALUE_PARAMETER name:y index:1 type:In<B> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='testInAs1(In<A>, In<B>): Unit'
+        CALL 'asT() on In<T>: Unit' type=kotlin.Unit origin=null
+          <reified T>: kotlin.Any
+          $receiver: CALL 'sel(S, S): S' type=In<kotlin.Any> origin=null
+            <S>: In<kotlin.Any>
+            x: GET_VAR 'value-parameter x: In<A>' type=In<A> origin=null
+            y: GET_VAR 'value-parameter y: In<B>' type=In<B> origin=null
+  FUN name:testInAs2 visibility:public modality:FINAL <> (x:In<Z1>, y:In<Z2>) returnType:kotlin.Unit flags:
+    VALUE_PARAMETER name:x index:0 type:In<Z1> flags:
+    VALUE_PARAMETER name:y index:1 type:In<Z2> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='testInAs2(In<Z1>, In<Z2>): Unit'
+        CALL 'asT() on In<T>: Unit' type=kotlin.Unit origin=null
+          <reified T>: kotlin.Any
+          $receiver: CALL 'sel(S, S): S' type=In<kotlin.Any> origin=null
+            <S>: In<kotlin.Any>
+            x: GET_VAR 'value-parameter x: In<Z1>' type=In<Z1> origin=null
+            y: GET_VAR 'value-parameter y: In<Z2>' type=In<Z2> origin=null
+  FUN name:testInAs3 visibility:public modality:FINAL <> (x:In<A1>, y:In<A2>) returnType:kotlin.Unit flags:
+    VALUE_PARAMETER name:x index:0 type:In<A1> flags:
+    VALUE_PARAMETER name:y index:1 type:In<A2> flags:
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='testInAs3(In<A1>, In<A2>): Unit'
+        CALL 'asT() on In<T>: Unit' type=kotlin.Unit origin=null
+          <reified T>: A
+          $receiver: CALL 'sel(S, S): S' type=In<A> origin=null
+            <S>: In<A>
+            x: GET_VAR 'value-parameter x: In<A1>' type=In<A1> origin=null
+            y: GET_VAR 'value-parameter y: In<A2>' type=In<A2> origin=null

compiler/tests/org/jetbrains/kotlin/ir/IrTextTestCaseGenerated.java

@@ -1485,4 +1485,32 @@ public class IrTextTestCaseGenerated extends AbstractIrTextTestCase {
             runTest("compiler/testData/ir/irText/stubs/simple.kt");
         }
     }
+
+    @TestMetadata("compiler/testData/ir/irText/types")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Types extends AbstractIrTextTestCase {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, TargetBackend.ANY, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInTypes() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/ir/irText/types"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("intersectionType1.kt")
+        public void testIntersectionType1() throws Exception {
+            runTest("compiler/testData/ir/irText/types/intersectionType1.kt");
+        }
+
+        @TestMetadata("intersectionType2.kt")
+        public void testIntersectionType2() throws Exception {
+            runTest("compiler/testData/ir/irText/types/intersectionType2.kt");
+        }
+
+        @TestMetadata("intersectionType3.kt")
+        public void testIntersectionType3() throws Exception {
+            runTest("compiler/testData/ir/irText/types/intersectionType3.kt");
+        }
+    }
 }