[K/N] Minor -Xcompile-from-bitcode enhancements

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

@@ -502,12 +502,7 @@ class KonanConfig(val project: Project, val configuration: CompilerConfiguration
      * Path to serialized dependencies to use for bitcode compilation.
      */
     internal val readSerializedDependencies: String? by lazy {
-        configuration.get(KonanConfigKeys.SERIALIZED_DEPENDENCIES).also {
+        configuration.get(KonanConfigKeys.SERIALIZED_DEPENDENCIES)
-            if (compileFromBitcode.isNullOrEmpty()) {
-                configuration.report(CompilerMessageSeverity.STRONG_WARNING,
-                        "Providing serialized dependencies only works in conjunction with a bitcode file to compile.")
-            }
-        }
     }
 
     /**

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

@@ -263,7 +263,7 @@ fun CompilerConfiguration.setupFromArguments(arguments: K2NativeCompilerArgument
     put(PARTIAL_LINKAGE, arguments.partialLinkage)
     put(OMIT_FRAMEWORK_BINARY, arguments.omitFrameworkBinary)
     putIfNotNull(COMPILE_FROM_BITCODE, arguments.compileFromBitcode)
-    putIfNotNull(SERIALIZED_DEPENDENCIES, arguments.serializedDependencies)
+    putIfNotNull(SERIALIZED_DEPENDENCIES, parseSerializedDependencies(arguments, this@setupFromArguments))
     putIfNotNull(SAVE_DEPENDENCIES_PATH, arguments.saveDependenciesPath)
     putIfNotNull(SAVE_LLVM_IR_DIRECTORY, arguments.saveLlvmIrDirectory)
 }
@@ -507,3 +507,14 @@ private fun parseBundleId(
         argumentValue
     }
 }
+
+private fun parseSerializedDependencies(
+        arguments: K2NativeCompilerArguments,
+        configuration: CompilerConfiguration
+): String? {
+    if (!arguments.serializedDependencies.isNullOrEmpty() && arguments.compileFromBitcode.isNullOrEmpty()) {
+        configuration.report(STRONG_WARNING,
+                "Providing serialized dependencies only works in conjunction with a bitcode file to compile.")
+    }
+    return arguments.serializedDependencies
+}

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

@@ -5,10 +5,12 @@
 
 package org.jetbrains.kotlin.backend.konan.driver
 
+import kotlinx.cinterop.CPointer
 import kotlinx.cinterop.usingJvmCInteropCallbacks
 import llvm.LLVMContextCreate
 import llvm.LLVMContextDispose
 import llvm.LLVMDisposeModule
+import llvm.LLVMOpaqueModule
 import org.jetbrains.kotlin.backend.konan.*
 import org.jetbrains.kotlin.backend.konan.BitcodePostProcessingContextImpl
 import org.jetbrains.kotlin.backend.konan.Context
@@ -133,8 +135,9 @@ internal class DynamicCompilerDriver : CompilerDriver() {
 
     private fun produceBinaryFromBitcode(engine: PhaseEngine<PhaseContext>, config: KonanConfig, bitcodeFilePath: String) {
         val llvmContext = LLVMContextCreate()!!
-        val llvmModule = parseBitcodeFile(llvmContext, bitcodeFilePath)
+        var llvmModule: CPointer<LLVMOpaqueModule>? = null
         try {
+            llvmModule = parseBitcodeFile(llvmContext, bitcodeFilePath)
             val context = BitcodePostProcessingContextImpl(config, llvmModule, llvmContext)
             val depsPath = config.readSerializedDependencies
             val dependencies = if (depsPath.isNullOrEmpty()) DependenciesTrackingResult(emptyList(), emptyList(), emptyList()).also {
@@ -142,7 +145,7 @@ internal class DynamicCompilerDriver : CompilerDriver() {
             } else DependenciesTrackingResult.deserialize(depsPath, File(depsPath).readStrings(), config)
             engine.runBitcodeBackend(context, dependencies)
         } finally {
-            LLVMDisposeModule(llvmModule)
+            llvmModule?.let { LLVMDisposeModule(it) }
             LLVMContextDispose(llvmContext)
         }
     }