[interop][SwiftToCxx] place ptrauth attribute on the function type itself for value witness function types

Fixes rdar://95224817

Author: hyp

lib/PrintAsClang/PrintSwiftToClangCoreScaffold.cpp

@@ -66,9 +66,9 @@ static void printValueWitnessTableFunctionType(raw_ostream &os, StringRef name,
                                                StringRef returnType,
                                                std::string paramTypes,
                                                uint16_t ptrauthDisc) {
-  os << "using ValueWitness" << name << "Ty = " << returnType << "(*)("
-     << paramTypes << ") __ptrauth_swift_value_witness_function_pointer("
-     << ptrauthDisc << ");\n";
+  os << "using ValueWitness" << name << "Ty = " << returnType
+     << "(* __ptrauth_swift_value_witness_function_pointer(" << ptrauthDisc
+     << "))(" << paramTypes << ");\n";
 }
 
 static std::string makeParams(const char *arg) { return arg; }

test/Interop/SwiftToCxx/core/swift-impl-defs-in-cxx.swift

@@ -23,14 +23,14 @@
 // CHECK-NEXT: // Swift type metadata request type.
 // CHECK-NEXT: typedef uint{{.*}}_t MetadataRequestTy;
 // CHECK-EMPTY:
-// CHECK-NEXT: using ValueWitnessInitializeBufferWithCopyOfBufferTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessDestroyTy = void(*)(void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessInitializeWithCopyTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessAssignWithCopyTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessInitializeWithTakeTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessAssignWithTakeTy = void * _Nonnull(*)(void * _Nonnull, void * _Nonnull, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessGetEnumTagSinglePayloadTy = unsigned(*)(const void * _Nonnull, unsigned, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
-// CHECK-NEXT: using ValueWitnessStoreEnumTagSinglePayloadTy = void(*)(void * _Nonnull, unsigned, unsigned, void * _Nonnull) __ptrauth_swift_value_witness_function_pointer(
+// CHECK-NEXT: using ValueWitnessInitializeBufferWithCopyOfBufferTy = void * _Nonnull(* __ptrauth_swift_value_witness_function_pointer(55882))(void * _Nonnull, void * _Nonnull, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessDestroyTy = void(* __ptrauth_swift_value_witness_function_pointer(1272))(void * _Nonnull, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessInitializeWithCopyTy = void * _Nonnull(* __ptrauth_swift_value_witness_function_pointer(58298))(void * _Nonnull, void * _Nonnull, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessAssignWithCopyTy = void * _Nonnull(* __ptrauth_swift_value_witness_function_pointer(34641))(void * _Nonnull, void * _Nonnull, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessInitializeWithTakeTy = void * _Nonnull(* __ptrauth_swift_value_witness_function_pointer(18648))(void * _Nonnull, void * _Nonnull, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessAssignWithTakeTy = void * _Nonnull(* __ptrauth_swift_value_witness_function_pointer(61402))(void * _Nonnull, void * _Nonnull, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessGetEnumTagSinglePayloadTy = unsigned(* __ptrauth_swift_value_witness_function_pointer(24816))(const void * _Nonnull, unsigned, void * _Nonnull);
+// CHECK-NEXT: using ValueWitnessStoreEnumTagSinglePayloadTy = void(* __ptrauth_swift_value_witness_function_pointer(41169))(void * _Nonnull, unsigned, unsigned, void * _Nonnull);
 // CHECK-EMPTY:
 // CHECK-NEXT: struct ValueWitnessTable {
 // CHECK-NEXT:  ValueWitnessInitializeBufferWithCopyOfBufferTy _Nonnull initializeBufferWithCopyOfBuffer;