[K/N] Add lowered suspend function mangling to avoid clashes

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/mangle/MangleConstant.kt

@@ -21,6 +21,7 @@ enum class MangleConstant(val prefix: Char, val separator: Char, val suffix: Cha
         const val ERROR_MARK = "<ERROR CLASS>"
         const val ERROR_DECLARATION = "<ERROR DECLARATION>"
         const val STATIC_MEMBER_MARK = "#static"
+        const val SUSPEND_FUNCTION_MARK = "#suspend"
         const val TYPE_PARAMETER_MARKER_NAME = "<TP>"
         const val TYPE_PARAMETER_MARKER_NAME_SETTER = "<STP>"
         const val BACKING_FIELD_NAME = "<BF>"

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/mangle/ir/IrMangleComputer.kt

@@ -28,6 +28,7 @@ abstract class IrMangleComputer(protected val builder: StringBuilder, private va
     private var isRealExpect = false
 
     open fun IrFunction.platformSpecificFunctionName(): String? = null
+    open fun IrFunction.platformSpecificFunctionMarks(): List<String> = emptyList()
 
     open fun IrFunction.specialValueParamPrefix(param: IrValueParameter): String = ""
 
@@ -112,6 +113,10 @@ abstract class IrMangleComputer(protected val builder: StringBuilder, private va
             builder.appendSignature(MangleConstant.STATIC_MEMBER_MARK)
         }
 
+        platformSpecificFunctionMarks().forEach {
+            builder.appendSignature(it)
+        }
+
         extensionReceiverParameter?.let {
             if (!it.isHidden) {
                 builder.appendSignature(MangleConstant.EXTENSION_RECEIVER_PREFIX)

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

@@ -1,6 +1,7 @@
 package org.jetbrains.kotlin.backend.konan.serialization
 
 import org.jetbrains.kotlin.backend.common.serialization.mangle.KotlinExportChecker
+import org.jetbrains.kotlin.backend.common.serialization.mangle.MangleConstant
 import org.jetbrains.kotlin.backend.common.serialization.mangle.MangleMode
 import org.jetbrains.kotlin.backend.common.serialization.mangle.descriptor.DescriptorBasedKotlinManglerImpl
 import org.jetbrains.kotlin.backend.common.serialization.mangle.descriptor.DescriptorExportCheckerVisitor
@@ -76,6 +77,11 @@ abstract class AbstractKonanIrMangler(private val withReturnType: Boolean) : IrB
             return null
         }
 
+        override fun IrFunction.platformSpecificFunctionMarks(): List<String> = when (origin) {
+            IrDeclarationOrigin.LOWERED_SUSPEND_FUNCTION -> listOfSuspendFunctionMark
+            else -> emptyList()
+        }
+
         override fun IrFunction.specialValueParamPrefix(param: IrValueParameter): String {
             // TODO: there are clashes originating from ObjectiveC interop.
             // kotlinx.cinterop.ObjCClassOf<T>.create(format: kotlin.String): T defined in platform.Foundation in file Foundation.kt
@@ -84,6 +90,10 @@ abstract class AbstractKonanIrMangler(private val withReturnType: Boolean) : IrB
 
             return if (this.hasObjCMethodAnnotation || this.hasObjCFactoryAnnotation || this.isObjCClassMethod()) "${param.name}:" else ""
         }
+
+        companion object {
+            val listOfSuspendFunctionMark = listOf(MangleConstant.SUSPEND_FUNCTION_MARK)
+        }
     }
 }
 

kotlin-native/backend.native/tests/filecheck/suspend_returnNothing.kt

@@ -19,7 +19,7 @@ suspend fun suspendForever(): Int = suspendCoroutineUninterceptedOrReturn {
 // CHECK-LABEL: define %struct.ObjHeader* @"kfun:$fooCOROUTINE
 
 // CHECK-NOT: ; Function Attrs: {{.*}}noreturn
-// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#foo(){}kotlin.Nothing"
+// CHECK-LABEL: define %struct.ObjHeader* @"kfun:#foo#suspend(kotlin.coroutines.Continuation<kotlin.Nothing>){}kotlin.Any"
 suspend fun foo(): Nothing {
     suspendForever()
     throw Error()