Introduce experimental FIR compiler #KT-31265 Fixed

This commit also includes several FIR2IR fixes which helps FIR compiler
to produce normal results

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendFacade.kt

@@ -10,8 +10,10 @@ import org.jetbrains.kotlin.codegen.CompilationErrorHandler
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.util.ExternalDependenciesGenerator
+import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi2ir.Psi2IrTranslator
+import org.jetbrains.kotlin.psi2ir.PsiSourceManager
 import org.jetbrains.kotlin.psi2ir.generators.GeneratorContext
 
 object JvmBackendFacade {
@@ -34,15 +36,28 @@ object JvmBackendFacade {
         irModuleFragment: IrModuleFragment,
         psi2irContext: GeneratorContext,
         phaseConfig: PhaseConfig
+    ) {
+        doGenerateFilesInternal(
+            state, errorHandler, irModuleFragment, psi2irContext.symbolTable, psi2irContext.sourceManager, phaseConfig
+        )
+    }
+
+    internal fun doGenerateFilesInternal(
+        state: GenerationState,
+        errorHandler: CompilationErrorHandler,
+        irModuleFragment: IrModuleFragment,
+        symbolTable: SymbolTable,
+        sourceManager: PsiSourceManager,
+        phaseConfig: PhaseConfig
     ) {
         val jvmBackendContext = JvmBackendContext(
-            state, psi2irContext.sourceManager, psi2irContext.irBuiltIns, irModuleFragment, psi2irContext.symbolTable, phaseConfig
+            state, sourceManager, irModuleFragment.irBuiltins, irModuleFragment, symbolTable, phaseConfig
         )
         //TODO
         ExternalDependenciesGenerator(
             irModuleFragment.descriptor,
-            psi2irContext.symbolTable,
-            psi2irContext.irBuiltIns,
+            symbolTable,
+            irModuleFragment.irBuiltins,
             JvmGeneratorExtensions.externalDeclarationOrigin
         ).generateUnboundSymbolsAsDependencies()
 

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmIrCodegenFactory.kt

@@ -20,9 +20,12 @@ import org.jetbrains.kotlin.backend.common.phaser.PhaseConfig
 import org.jetbrains.kotlin.codegen.*
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
+import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
+import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi2ir.Psi2IrTranslator
+import org.jetbrains.kotlin.psi2ir.PsiSourceManager
 
 class JvmIrCodegenFactory(private val phaseConfig: PhaseConfig) : CodegenFactory {
 
@@ -33,6 +36,16 @@ class JvmIrCodegenFactory(private val phaseConfig: PhaseConfig) : CodegenFactory
         JvmBackendFacade.doGenerateFilesInternal(state, errorHandler, irModuleFragment, psi2irContext, phaseConfig)
     }
 
+    fun generateModule(
+        state: GenerationState,
+        irModuleFragment: IrModuleFragment,
+        errorHandler: CompilationErrorHandler,
+        symbolTable: SymbolTable,
+        sourceManager: PsiSourceManager
+    ) {
+        JvmBackendFacade.doGenerateFilesInternal(state, errorHandler, irModuleFragment, symbolTable, sourceManager, phaseConfig)
+    }
+
     override fun createPackageCodegen(state: GenerationState, files: Collection<KtFile>, fqName: FqName): PackageCodegen {
         val impl = PackageCodegenImpl(state, files, fqName)