================
@@ -0,0 +1,98 @@
+// RUN: %clang_cc1 -triple x86_64-win32 -fms-extensions -fsyntax-only -verify
%s
+// RUN: %clang_cc1 -triple x86_64-mingw -fsyntax-only -verify
%s
+// RUN: %clang_cc1 -triple x86_64-cygwin -fsyntax-only -verify
%s
+
+// Test that memberwise dllexport and dllimport are warned if the
+// exclude_from_explicit_instantiation attribute is attached.
+
+#define EXCLUDE_ATTR __attribute__((exclude_from_explicit_instantiation))
+
+template <class T>
+struct C {
+ EXCLUDE_ATTR __declspec(dllexport) void fn_excluded_exported();
+// expected-warning@-1{{'dllexport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ EXCLUDE_ATTR __declspec(dllimport) void fn_excluded_imported();
+// expected-warning@-1{{'dllimport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ EXCLUDE_ATTR __declspec(dllexport) static int var_excluded_exported;
+// expected-warning@-1{{'dllexport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ EXCLUDE_ATTR __declspec(dllimport) static int var_excluded_imported;
+// expected-warning@-1{{'dllimport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ struct EXCLUDE_ATTR __declspec(dllexport) nested_excluded_exported {};
+// expected-warning@-1{{'dllexport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ struct EXCLUDE_ATTR __declspec(dllimport) nested_excluded_imported {};
+// expected-warning@-1{{'dllimport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+
+ // No warnings here since nested_excluded is not instantiated.
+ struct EXCLUDE_ATTR nested_excluded {
+ __declspec(dllexport) void fn_exported();
+ __declspec(dllimport) void fn_imported();
+ };
+ // This too. nested_exported is not instantiated.
+ struct __declspec(dllexport) nested_exported {
+ EXCLUDE_ATTR void fn_excluded();
+ EXCLUDE_ATTR static int var_excluded;
+ };
+ // The same. nested_imported is not instantiated.
+ struct __declspec(dllimport) nested_imported {
+ EXCLUDE_ATTR void fn_excluded();
+ EXCLUDE_ATTR static int var_excluded;
+ };
+
+ struct nested {
+ EXCLUDE_ATTR __declspec(dllexport) void fn_excluded_exported();
+ // expected-warning@-1{{'dllexport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ EXCLUDE_ATTR __declspec(dllimport) void fn_excluded_imported();
+ // expected-warning@-1{{'dllimport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ EXCLUDE_ATTR __declspec(dllexport) static int var_excluded_exported;
+ // expected-warning@-1{{'dllexport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ EXCLUDE_ATTR __declspec(dllimport) static int var_excluded_imported;
+ // expected-warning@-1{{'dllimport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
+ };
+};
+
+// Test that class-level dll attributes doesn't cause a warning on an excluded
member.
+template <class T>
+struct __declspec(dllexport) DE {
+ EXCLUDE_ATTR void fn_excluded();
+};
+template struct DE<int>;
+
+template <class T>
+struct __declspec(dllimport) DI {
+ EXCLUDE_ATTR void fn_excluded();
+};
+template struct DI<int>;
+
+// Test that dll attributes on explicit instantiation doesn't cause a warning
on
+// an excluded member.
+// However, a non-template nested type may be warned on an excluded member by
+// its dll attribute.
+template <class T>
+struct E {
+ EXCLUDE_ATTR void fn_excluded();
+ struct EXCLUDE_ATTR nested_excluded {
+ __declspec(dllexport) void fn_exported();
+ __declspec(dllimport) void fn_imported();
+ };
+
+ struct __declspec(dllexport) nested_exported_1 {
+ // expected-warning@-1{{'dllexport' attribute ignored;
'exclude_from_explicit_instantiation' takes precedence}}
----------------
kikairoya wrote:
This warning was triggered by `fn_excluded`, but the message is supposed to
point to `dllexport`, so it doesn't point there.
This construct uses a new warning points to the exclude attribute, with a note
points to `dllexport`.
https://github.com/llvm/llvm-project/pull/183515
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