Introduce SymbolTable lifecycle

To be enforced later

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

@@ -221,10 +221,14 @@ internal class Context(config: KonanConfig) : KonanBackendContext(config) {
 
     val specialDeclarationsFactory = SpecialDeclarationsFactory(this)
 
-    class LazyMember<T>(val initializer: Context.() -> T) {
+    open class LazyMember<T>(val initializer: Context.() -> T) {
         operator fun getValue(thisRef: Context, property: KProperty<*>): T = thisRef.getValue(this)
     }
 
+    class LazyVarMember<T>(initializer: Context.() -> T) : LazyMember<T>(initializer) {
+        operator fun setValue(thisRef: Context, property: KProperty<*>, newValue: T) = thisRef.setValue(this, newValue)
+    }
+
     companion object {
         fun <T> lazyMember(initializer: Context.() -> T) = LazyMember<T>(initializer)
 
@@ -235,6 +239,8 @@ internal class Context(config: KonanConfig) : KonanBackendContext(config) {
             }
             result
         }
+
+        fun <T> nullValue() = LazyVarMember<T?>({ null })
     }
 
     private val lazyValues = mutableMapOf<LazyMember<*>, Any?>()
@@ -242,6 +248,10 @@ internal class Context(config: KonanConfig) : KonanBackendContext(config) {
     fun <T> getValue(member: LazyMember<T>): T =
             @Suppress("UNCHECKED_CAST") (lazyValues.getOrPut(member, { member.initializer(this) }) as T)
 
+    fun <T> setValue(member: LazyVarMember<T>, newValue: T) {
+        lazyValues[member] = newValue
+    }
+
     val reflectionTypes: KonanReflectionTypes by lazy(PUBLICATION) {
         KonanReflectionTypes(moduleDescriptor, KonanFqNames.internalPackageName)
     }

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

@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.config.languageVersionSettings
 import org.jetbrains.kotlin.backend.common.serialization.DescriptorTable
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
+import org.jetbrains.kotlin.ir.util.SymbolTable
 import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.konan.target.CompilerOutputKind
 import org.jetbrains.kotlin.psi2ir.Psi2IrConfiguration
@@ -50,6 +51,19 @@ internal val frontendPhase = konanUnitPhase(
         description = "Frontend builds AST"
 )
 
+/**
+ * Valid from [createSymbolTablePhase] until [destroySymbolTablePhase].
+ */
+private var Context.symbolTable: SymbolTable? by Context.nullValue()
+
+internal val createSymbolTablePhase = konanUnitPhase(
+        op = {
+            this.symbolTable = SymbolTable()
+        },
+        name = "CreateSymbolTable",
+        description = "Create SymbolTable"
+)
+
 internal val objCExportPhase = konanUnitPhase(
         op = {
             objCExport = ObjCExport(this)
@@ -61,9 +75,12 @@ internal val objCExportPhase = konanUnitPhase(
 internal val psiToIrPhase = konanUnitPhase(
         op = {
             // Translate AST to high level IR.
+
+            val symbolTable = symbolTable!!
+
             val translator = Psi2IrTranslator(config.configuration.languageVersionSettings,
                     Psi2IrConfiguration(false))
-            val generatorContext = translator.createGeneratorContext(moduleDescriptor, bindingContext)
+            val generatorContext = translator.createGeneratorContext(moduleDescriptor, bindingContext, symbolTable)
             @Suppress("DEPRECATION")
             psi2IrGeneratorContext = generatorContext
 
@@ -73,7 +90,7 @@ internal val psiToIrPhase = konanUnitPhase(
                     moduleDescriptor,
                     this as LoggingContext,
                     generatorContext.irBuiltIns,
-                    generatorContext.symbolTable,
+                    symbolTable,
                     forwardDeclarationsModuleDescriptor,
                     getExportedDependencies()
             )
@@ -91,7 +108,7 @@ internal val psiToIrPhase = konanUnitPhase(
                 dependenciesCount = dependencies.size
             }
 
-            val symbols = KonanSymbols(this, generatorContext.symbolTable, generatorContext.symbolTable.lazyWrapper)
+            val symbols = KonanSymbols(this, symbolTable, symbolTable.lazyWrapper)
             val module = translator.generateModuleFragment(generatorContext, environment.getSourceFiles(), deserializer)
 
             irModule = module
@@ -101,7 +118,17 @@ internal val psiToIrPhase = konanUnitPhase(
 //        validateIrModule(this, module)
         },
         name = "Psi2Ir",
-        description = "Psi to IR conversion"
+        description = "Psi to IR conversion",
+        prerequisite = setOf(createSymbolTablePhase)
+)
+
+internal val destroySymbolTablePhase = konanUnitPhase(
+        op = {
+            this.symbolTable = null // TODO: invalidate symbolTable itself.
+        },
+        name = "DestroySymbolTable",
+        description = "Destroy SymbolTable",
+        prerequisite = setOf(createSymbolTablePhase)
 )
 
 internal val irGeneratorPluginsPhase = konanUnitPhase(
@@ -274,8 +301,10 @@ val toplevelPhase: CompilerPhase<*, Unit, Unit> = namedUnitPhase(
         name = "Compiler",
         description = "The whole compilation process",
         lower = frontendPhase then
+                createSymbolTablePhase then
                 objCExportPhase then
                 psiToIrPhase then
+                destroySymbolTablePhase then
                 irGeneratorPluginsPhase then
                 copyDefaultValuesToActualPhase then
                 patchDeclarationParents0Phase then