Add missing pointer nullability annotation for inout function

Author: WANGJIEKE

lib/PrintAsClang/PrintClangFunction.cpp

@@ -101,7 +101,8 @@ class CFunctionSignatureTypePrinter
         moduleContext(moduleContext), typeUseKind(typeUseKind) {}
 
   void printInoutTypeModifier() {
-    os << (languageMode == swift::OutputLanguageMode::Cxx ? " &" : " *");
+    os << (languageMode == swift::OutputLanguageMode::Cxx ? " &"
+                                                          : " * _Nonnull");
   }
 
   bool printIfKnownSimpleType(const TypeDecl *typeDecl,

test/Interop/SwiftToCxx/functions/swift-primitive-inout-functions-cxx-bridging.swift

@@ -4,11 +4,11 @@
 
 // RUN: %check-interop-cxx-header-in-clang(%t/functions.h)
 
-// CHECK: SWIFT_EXTERN void $s9Functions8inOutIntyySizF(ptrdiff_t * x) SWIFT_NOEXCEPT SWIFT_CALL; // inOutInt(_:)
-// CHECK: SWIFT_EXTERN void $s9Functions11inOutTwoIntyySiz_SiztF(ptrdiff_t * x, ptrdiff_t * y) SWIFT_NOEXCEPT SWIFT_CALL; // inOutTwoInt(_:_:)
-// CHECK: SWIFT_EXTERN void $s9Functions13inOutTwoParamyySbz_SdztF(bool * x, double * y) SWIFT_NOEXCEPT SWIFT_CALL; // inOutTwoParam(_:_:)
-// CHECK: SWIFT_EXTERN void $s9Functions24inoutTypeWithNullabilityyySVzF(void const * _Nonnull * x) SWIFT_NOEXCEPT SWIFT_CALL; // inoutTypeWithNullability(_:)
-// CHECK: SWIFT_EXTERN void $s9Functions25inoutUnsafeGenericPointeryySPys5Int32VGzF(int32_t const * _Nonnull * x) SWIFT_NOEXCEPT SWIFT_CALL; // inoutUnsafeGenericPointer(_:)
+// CHECK: SWIFT_EXTERN void $s9Functions8inOutIntyySizF(ptrdiff_t * _Nonnull x) SWIFT_NOEXCEPT SWIFT_CALL; // inOutInt(_:)
+// CHECK: SWIFT_EXTERN void $s9Functions11inOutTwoIntyySiz_SiztF(ptrdiff_t * _Nonnull x, ptrdiff_t * _Nonnull y) SWIFT_NOEXCEPT SWIFT_CALL; // inOutTwoInt(_:_:)
+// CHECK: SWIFT_EXTERN void $s9Functions13inOutTwoParamyySbz_SdztF(bool * _Nonnull x, double * _Nonnull y) SWIFT_NOEXCEPT SWIFT_CALL; // inOutTwoParam(_:_:)
+// CHECK: SWIFT_EXTERN void $s9Functions24inoutTypeWithNullabilityyySVzF(void const * _Nonnull * _Nonnull x) SWIFT_NOEXCEPT SWIFT_CALL; // inoutTypeWithNullability(_:)
+// CHECK: SWIFT_EXTERN void $s9Functions25inoutUnsafeGenericPointeryySPys5Int32VGzF(int32_t const * _Nonnull * _Nonnull x) SWIFT_NOEXCEPT SWIFT_CALL; // inoutUnsafeGenericPointer(_:)
 
 // CHECK:      inline void inOutInt(swift::Int & x) noexcept {
 // CHECK-NEXT:   return _impl::$s9Functions8inOutIntyySizF(&x);