diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -835,6 +835,15 @@
     if (Function->getStorageClass() == SC_PrivateExtern)
       LV.mergeVisibility(HiddenVisibility, true);
 
+    // OpenMP target declare device functions are not callable from the host so
+    // they should not be exported from the device image. This applies to all
+    // functions as the host-callable kernel functions are emitted at codegen.
+    if (Context.getLangOpts().OpenMP && Context.getLangOpts().OpenMPIsDevice &&
+        ((Context.getTargetInfo().getTriple().isAMDGPU() ||
+          Context.getTargetInfo().getTriple().isNVPTX()) ||
+         OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Function)))
+      LV.mergeVisibility(HiddenVisibility, /*newExplicit=*/false);
+
     // Note that Sema::MergeCompatibleFunctionDecls already takes care of
     // merging storage classes and visibility attributes, so we don't have to
     // look at previous decls in here.
diff --git a/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp b/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp
--- a/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp
@@ -34,12 +34,12 @@
 #pragma omp declare target (bar)
 int caz() { return 0; }
 
-// DEVICE-DAG: define{{ protected | }}noundef i32 [[FOO:@.*foo.*]]()
-// DEVICE-DAG: define{{ protected | }}noundef i32 [[BAR:@.*bar.*]]()
-// DEVICE-DAG: define{{ protected | }}noundef i32 [[BAZ:@.*baz.*]]()
-// DEVICE-DAG: define{{ protected | }}noundef i32 [[DOO:@.*doo.*]]()
-// DEVICE-DAG: define{{ protected | }}noundef i32 [[CAR:@.*car.*]]()
-// DEVICE-DAG: define{{ protected | }}noundef i32 [[CAZ:@.*caz.*]]()
+// DEVICE-DAG: define hidden noundef i32 [[FOO:@.*foo.*]]()
+// DEVICE-DAG: define hidden noundef i32 [[BAR:@.*bar.*]]()
+// DEVICE-DAG: define hidden noundef i32 [[BAZ:@.*baz.*]]()
+// DEVICE-DAG: define hidden noundef i32 [[DOO:@.*doo.*]]()
+// DEVICE-DAG: define hidden noundef i32 [[CAR:@.*car.*]]()
+// DEVICE-DAG: define hidden noundef i32 [[CAZ:@.*caz.*]]()
 
 static int c = foo() + bar() + baz();
 #pragma omp declare target (c)
diff --git a/clang/test/OpenMP/nvptx_unsupported_type_codegen.cpp b/clang/test/OpenMP/nvptx_unsupported_type_codegen.cpp
--- a/clang/test/OpenMP/nvptx_unsupported_type_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_unsupported_type_codegen.cpp
@@ -34,18 +34,18 @@
 #pragma omp declare target
 T a = T();
 T f = a;
-// CHECK: define{{ protected | }}void @{{.+}}foo{{.+}}([[T]]* noundef byval([[T]]) align {{.+}})
+// CHECK: define{{ hidden | }}void @{{.+}}foo{{.+}}([[T]]* noundef byval([[T]]) align {{.+}})
 void foo(T a = T()) {
   return;
 }
-// CHECK: define{{ protected | }}[6 x i64] @{{.+}}bar{{.+}}()
+// CHECK: define{{ hidden | }}[6 x i64] @{{.+}}bar{{.+}}()
 T bar() {
 // CHECK:      bitcast [[T]]* %{{.+}} to [6 x i64]*
 // CHECK-NEXT: load [6 x i64], [6 x i64]* %{{.+}},
 // CHECK-NEXT: ret [6 x i64]
   return T();
 }
-// CHECK: define{{ protected | }}void @{{.+}}baz{{.+}}()
+// CHECK: define{{ hidden | }}void @{{.+}}baz{{.+}}()
 void baz() {
 // CHECK:      call [6 x i64] @{{.+}}bar{{.+}}()
 // CHECK-NEXT: bitcast [[T]]* %{{.+}} to [6 x i64]*
@@ -54,17 +54,17 @@
 }
 T1 a1 = T1();
 T1 f1 = a1;
-// CHECK: define{{ protected | }}void @{{.+}}foo1{{.+}}([[T1]]* noundef byval([[T1]]) align {{.+}})
+// CHECK: define{{ hidden | }}void @{{.+}}foo1{{.+}}([[T1]]* noundef byval([[T1]]) align {{.+}})
 void foo1(T1 a = T1()) {
   return;
 }
-// CHECK: define{{ protected | }}[[T1]] @{{.+}}bar1{{.+}}()
+// CHECK: define{{ hidden | }}[[T1]] @{{.+}}bar1{{.+}}()
 T1 bar1() {
 // CHECK:      load [[T1]], [[T1]]*
 // CHECK-NEXT: ret [[T1]]
   return T1();
 }
-// CHECK: define{{ protected | }}void @{{.+}}baz1{{.+}}()
+// CHECK: define{{ hidden | }}void @{{.+}}baz1{{.+}}()
 void baz1() {
 // CHECK: call [[T1]] @{{.+}}bar1{{.+}}()
   T1 t = bar1();
diff --git a/clang/test/OpenMP/target_attribute_convergent.cpp b/clang/test/OpenMP/target_attribute_convergent.cpp
--- a/clang/test/OpenMP/target_attribute_convergent.cpp
+++ b/clang/test/OpenMP/target_attribute_convergent.cpp
@@ -9,5 +9,5 @@
 #pragma omp end declare target
 
 // CHECK: Function Attrs: {{.*}}convergent{{.*}}
-// CHECK: define protected void @_Z3foov() [[ATTRIBUTE_NUMBER:#[0-9]+]]
+// CHECK: define hidden void @_Z3foov() [[ATTRIBUTE_NUMBER:#[0-9]+]]
 // CHECK: attributes [[ATTRIBUTE_NUMBER]] = { {{.*}}convergent{{.*}} }