[K/N] Turn NativeGenerationState into PhaseContext

It allows to use NativeGenerationState as a PhaseContext in lowering
and codegen phases.

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

@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.backend.konan
 
 import llvm.*
+import org.jetbrains.kotlin.backend.konan.driver.BasicPhaseContext
 import org.jetbrains.kotlin.backend.konan.llvm.*
 import org.jetbrains.kotlin.backend.konan.llvm.DebugInfo
 import org.jetbrains.kotlin.backend.konan.llvm.Llvm
@@ -42,9 +43,11 @@ internal class FileLowerState {
             "$prefix${cStubCount++}"
 }
 
-internal class NativeGenerationState(val context: Context, val cacheDeserializationStrategy: CacheDeserializationStrategy?) {
-    private val config = context.config
-
+internal class NativeGenerationState(
+        config: KonanConfig,
+        val context: Context,
+        val cacheDeserializationStrategy: CacheDeserializationStrategy?
+) : BasicPhaseContext(config) {
     private val outputPath = config.cacheSupport.tryGetImplicitOutput(cacheDeserializationStrategy) ?: config.outputPath
     val outputFiles = OutputFiles(outputPath, config.target, config.produce)
     val tempFiles = run {
@@ -118,7 +121,7 @@ internal class NativeGenerationState(val context: Context, val cacheDeserializat
     }
 
     private var isDisposed = false
-    fun dispose() {
+    override fun dispose() {
         if (isDisposed) return
 
         if (hasDebugInfo()) {

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

@@ -361,7 +361,11 @@ internal val umbrellaCompilation = SameTypeNamedCompilerPhase(
                 for (file in files) {
                     if (file.isFunctionInterfaceFile) continue
 
-                    context.generationState = NativeGenerationState(context, CacheDeserializationStrategy.SingleFile(file.path, file.fqName.asString()))
+                    context.generationState = NativeGenerationState(
+                            context.config,
+                            context,
+                            CacheDeserializationStrategy.SingleFile(file.path, file.fqName.asString())
+                    )
 
                     module.files += file
                     if (context.generationState.shouldDefineFunctionClasses)
@@ -449,7 +453,7 @@ internal val createGenerationStatePhase = namedUnitPhase(
         description = "Create generation state",
         lower = object : CompilerPhase<Context, Unit, Unit> {
             override fun invoke(phaseConfig: PhaseConfigurationService, phaserState: PhaserState<Unit>, context: Context, input: Unit) {
-                context.generationState = NativeGenerationState(context, context.config.libraryToCache?.strategy)
+                context.generationState = NativeGenerationState(context.config, context, context.config.libraryToCache?.strategy)
             }
         }
 )