JVM_IR: Add attributes to named suspend functions

This is a prerequisite to moving continuation classes inside said
functions, which is needed to support crossinline suspend lambdas.
The logic of whether to copy attributes on lowerings or not is simple:
  - if the lowering moves function body to a new place, it should copy
  the attributes.
  - if the lowering just generates new declarations (i.e. bridges), it
  should leave attributes as is.

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/ir/IrUtils.kt

@@ -493,6 +493,7 @@ fun IrClass.addFakeOverrides() {
                 parent = this@addFakeOverrides
                 overriddenSymbols += overriddenFunctions.map { it.symbol }
                 copyParameterDeclarationsFrom(irFunction)
+                copyAttributes(irFunction)
             }
         }
 

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/DefaultArgumentStubGenerator.kt

@@ -6,7 +6,7 @@
 package org.jetbrains.kotlin.backend.common.lower
 
 import org.jetbrains.kotlin.backend.common.*
-import org.jetbrains.kotlin.backend.common.descriptors.*
+import org.jetbrains.kotlin.backend.common.descriptors.synthesizedString
 import org.jetbrains.kotlin.backend.common.ir.*
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.descriptors.Visibilities
@@ -22,7 +22,10 @@ import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
-import org.jetbrains.kotlin.ir.types.*
+import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.types.defaultType
+import org.jetbrains.kotlin.ir.types.isNullable
+import org.jetbrains.kotlin.ir.types.makeNullable
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/LocalDeclarationsLowering.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -543,6 +543,7 @@ class LocalDeclarationsLowering(
                     newParameterToOld.putAbsentOrSame(it, this)
                 }
             }
+            newDeclaration.copyAttributes(oldDeclaration)
 
             newDeclaration.valueParameters += createTransformedValueParameters(capturedValues, oldDeclaration, newDeclaration)
             newDeclaration.recordTransformedValueParameters(localFunctionContext)