IR: add BackendContext.typeSystem and JvmIrTypeSystemContext

To be able to override JVM-specific behavior of IrTypeSystemContext in
JVM IR, for things like JVM flexible types.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt

@@ -24,6 +24,8 @@ import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.IrFieldImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
 import org.jetbrains.kotlin.ir.util.*
+import org.jetbrains.kotlin.ir.types.IrTypeSystemContext
+import org.jetbrains.kotlin.ir.types.IrTypeSystemContextImpl
 import org.jetbrains.kotlin.builtins.konan.KonanBuiltIns
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
@@ -330,6 +332,9 @@ internal class Context(config: KonanConfig) : KonanBackendContext(config) {
     override val irBuiltIns
         get() = ir.irModule.irBuiltins
 
+    override val typeSystem: IrTypeSystemContext
+        get() = IrTypeSystemContextImpl(irBuiltIns)
+
     val interopBuiltIns by lazy {
         InteropBuiltIns(this.builtIns)
     }

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EnumSpecialDescriptorsFactory.kt

@@ -13,7 +13,6 @@ import org.jetbrains.kotlin.backend.konan.descriptors.synthesizedName
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.Modality
-import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.declarations.buildFun
 import org.jetbrains.kotlin.ir.builders.irBlockBody
 import org.jetbrains.kotlin.ir.builders.irCall
@@ -32,9 +31,11 @@ import org.jetbrains.kotlin.ir.symbols.impl.IrFieldSymbolImpl
 import org.jetbrains.kotlin.ir.symbols.impl.IrSimpleFunctionSymbolImpl
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.types.typeWith
-import org.jetbrains.kotlin.ir.util.*
+import org.jetbrains.kotlin.ir.util.constructors
+import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.util.functions
+import org.jetbrains.kotlin.ir.util.module
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.resolve.descriptorUtil.module
 
 
 internal object DECLARATION_ORIGIN_ENUM : IrDeclarationOriginImpl("ENUM")
@@ -203,7 +204,7 @@ internal class EnumSpecialDeclarationsFactory(val context: Context) {
         )
 
         implObject.superTypes += context.irBuiltIns.anyType
-        implObject.addFakeOverrides(context.irBuiltIns)
+        implObject.addFakeOverrides(context.typeSystem)
 
         val itemGetterSymbol = findItemGetterSymbol()
         val enumEntriesMap = enumEntriesMap(enumClass)

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt

@@ -45,6 +45,7 @@ import org.jetbrains.kotlin.util.OperatorNameConventions
 
 internal interface KotlinStubs {
     val irBuiltIns: IrBuiltIns
+    val typeSystem: IrTypeSystemContext
     val symbols: KonanSymbols
     val target: KonanTarget
     val language: String
@@ -1221,7 +1222,7 @@ private class ObjCBlockPointerValuePassing(
             +irReturn(callBlock(blockPointer, arguments))
         }
 
-        irClass.addFakeOverrides(stubs.irBuiltIns)
+        irClass.addFakeOverrides(stubs.typeSystem)
 
         stubs.addKotlin(irClass)
         return constructor

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FunctionReferenceLowering.kt

@@ -294,7 +294,7 @@ internal class FunctionReferenceLowering(val context: Context): FileLoweringPass
 
             functionReferenceClass.superTypes += superTypes
 
-            functionReferenceClass.addFakeOverrides(context.irBuiltIns)
+            functionReferenceClass.addFakeOverrides(context.typeSystem)
 
             return BuiltFunctionReference(functionReferenceClass, buildConstructor())
         }

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt

@@ -80,6 +80,7 @@ private abstract class BaseInteropIrTransformer(private val context: Context) :
         return object : KotlinStubs {
             override val irBuiltIns get() = context.irBuiltIns
             override val symbols get() = context.ir.symbols
+            override val typeSystem: IrTypeSystemContext get() = context.typeSystem
 
             val klib: KonanLibrary? get() {
                 return (element as? IrCall)?.symbol?.owner?.konanLibrary as? KonanLibrary

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/TestProcessor.kt

@@ -518,7 +518,7 @@ internal class TestProcessor (val context: Context) {
             companionGetter?.let { declarations += it }
 
             superTypes += symbols.baseClassSuite.typeWith(listOf(testClassType, testCompanionType))
-            addFakeOverrides(context.irBuiltIns)
+            addFakeOverrides(context.typeSystem)
         }
     //endregion
 

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/KonanIrlinker.kt

@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.ir.descriptors.IrAbstractFunctionFactory
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.symbols.impl.IrPublicSymbolBase
+import org.jetbrains.kotlin.ir.types.IrTypeSystemContextImpl
 import org.jetbrains.kotlin.ir.types.classOrNull
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
@@ -91,7 +92,8 @@ internal class KonanIrLinker(
     override fun isBuiltInModule(moduleDescriptor: ModuleDescriptor): Boolean = moduleDescriptor.isNativeStdlib()
 
     private val forwardDeclarationDeserializer = forwardModuleDescriptor?.let { KonanForwardDeclarationModuleDeserializer(it) }
-    override val fakeOverrideBuilder = FakeOverrideBuilder(this, symbolTable, KonanManglerIr, builtIns, KonanFakeOverrideClassFilter)
+    override val fakeOverrideBuilder: FakeOverrideBuilder =
+        FakeOverrideBuilder(this, symbolTable, KonanManglerIr, IrTypeSystemContextImpl(builtIns), KonanFakeOverrideClassFilter)
 
     override fun createModuleDeserializer(moduleDescriptor: ModuleDescriptor, klib: KotlinLibrary?, strategy: DeserializationStrategy): IrModuleDeserializer {
         if (moduleDescriptor === forwardModuleDescriptor) {