[K/N] All bridges should have cleanup landingpad block (BB with return can be called before setting terminated function used as reason to add Enter/Leave frame functions)

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

@@ -475,7 +475,7 @@ internal abstract class FunctionGenerationContext(
     private val entryBb = basicBlockInFunction("entry", startLocation)
     protected val cleanupLandingpad = basicBlockInFunction("cleanup_landingpad", endLocation)
 
-    private val needLeaveFrameInUnwindEpilogue: Boolean
+    protected open val needLeaveFrameInUnwindEpilogue: Boolean
         get() = irFunction?.annotations?.hasAnnotation(RuntimeNames.exportForCppRuntime) == true
                 || forwardingForeignExceptionsTerminatedWith != null
                 || irFunction?.origin == CBridgeOrigin.C_TO_KOTLIN_BRIDGE
@@ -894,7 +894,7 @@ internal abstract class FunctionGenerationContext(
     fun extractValue(aggregate: LLVMValueRef, index: Int, name: String = ""): LLVMValueRef =
             LLVMBuildExtractValue(builder, aggregate, index, name)!!
 
-    fun gxxLandingpad(numClauses: Int, name: String = "", switchThreadState: Boolean = false, callFromCleanupBlock: Boolean = false): LLVMValueRef {
+    fun gxxLandingpad(numClauses: Int, name: String = "", switchThreadState: Boolean = false): LLVMValueRef {
         val personalityFunction = context.llvm.gxxPersonalityFunction.llvmValue
 
         // Type of `landingpad` instruction result (depends on personality function):
@@ -907,8 +907,7 @@ internal abstract class FunctionGenerationContext(
         }
         call(context.llvm.setCurrentFrameFunction, listOf(slotsPhi!!))
         setCurrentFrameIsCalled = true
-        if (!callFromCleanupBlock)
-            handleEpilogueForExperimentalMM(context.llvm.Kotlin_mm_safePointExceptionUnwind)
+        //handleEpilogueForExperimentalMM(context.llvm.Kotlin_mm_safePointExceptionUnwind)
 
         return landingpad
     }
@@ -1495,7 +1494,7 @@ internal abstract class FunctionGenerationContext(
 
         if (shouldHaveCleanupLandingpad) {
             appendingTo(cleanupLandingpad) {
-                val landingpad = gxxLandingpad(numClauses = 0, callFromCleanupBlock = true)
+                val landingpad = gxxLandingpad(numClauses = 0)
                 LLVMSetCleanup(landingpad, 1)
 
                 forwardingForeignExceptionsTerminatedWith?.let { terminator ->

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt

@@ -53,6 +53,9 @@ internal class ObjCExportFunctionGenerationContext(
 ) : FunctionGenerationContext(builder) {
     private val objCExportCodegen = builder.objCExportCodegen
 
+    override val needLeaveFrameInUnwindEpilogue: Boolean
+        get() = true
+
     // Note: we could generate single "epilogue" and make all [ret]s just branch to it (like [DefaultFunctionGenerationContext]),
     // but this would be useless for most of the usages, which have only one [ret].
     // Remaining usages can be optimized ad hoc.