--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/dllexport.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,164 @@
+// RUN: %clang_cc1 -triple i686-win32     -fsyntax-only -fms-extensions -verify -std=c99 %s
+// RUN: %clang_cc1 -triple x86_64-win32   -fsyntax-only -fms-extensions -verify -std=c11 %s
+// RUN: %clang_cc1 -triple i686-mingw32   -fsyntax-only -fms-extensions -verify -std=c11 %s
+// RUN: %clang_cc1 -triple x86_64-mingw32 -fsyntax-only -fms-extensions -verify -std=c99 %s
+
+// Invalid usage.
+__declspec(dllexport) typedef int typedef1;
+// expected-warning@-1{{'dllexport' attribute only applies to functions, variables, classes, and Objective-C interfaces}}
+typedef __declspec(dllexport) int typedef2;
+// expected-warning@-1{{'dllexport' attribute only applies to}}
+typedef int __declspec(dllexport) typedef3;
+// expected-warning@-1{{'dllexport' attribute only applies to}}
+typedef __declspec(dllexport) void (*FunTy)();
+// expected-warning@-1{{'dllexport' attribute only applies to}}
+enum __declspec(dllexport) Enum { EnumVal };
+// expected-warning@-1{{'dllexport' attribute only applies to}}
+struct __declspec(dllexport) Record {};
+// expected-warning@-1{{'dllexport' attribute only applies to}}
+
+
+
+//===----------------------------------------------------------------------===//
+// Globals
+//===----------------------------------------------------------------------===//
+
+// Export declaration.
+__declspec(dllexport) extern int ExternGlobalDecl;
+
+// dllexport implies a definition.
+__declspec(dllexport) int GlobalDef;
+
+// Export definition.
+__declspec(dllexport) int GlobalInit1 = 1;
+int __declspec(dllexport) GlobalInit2 = 1;
+
+// Declare, then export definition.
+__declspec(dllexport) extern int GlobalDeclInit;
+int GlobalDeclInit = 1;
+
+// Redeclarations
+__declspec(dllexport) extern int GlobalRedecl1;
+__declspec(dllexport)        int GlobalRedecl1;
+
+__declspec(dllexport) extern int GlobalRedecl2;
+                             int GlobalRedecl2;
+
+                      extern int GlobalRedecl3; // expected-note{{previous declaration is here}}
+int useGlobalRedecl3() { return GlobalRedecl3; }
+__declspec(dllexport) extern int GlobalRedecl3; // expected-error{{redeclaration of 'GlobalRedecl3' cannot add 'dllexport' attribute}}
+
+                      extern int GlobalRedecl4; // expected-note{{previous declaration is here}}
+__declspec(dllexport) extern int GlobalRedecl4; // expected-warning{{redeclaration of 'GlobalRedecl4' should not add 'dllexport' attribute}}
+
+
+// External linkage is required.
+__declspec(dllexport) static int StaticGlobal; // expected-error{{'StaticGlobal' must have external linkage when declared 'dllexport'}}
+
+// Thread local variables are invalid.
+__declspec(dllexport) __thread int ThreadLocalGlobal; // expected-error{{'ThreadLocalGlobal' cannot be thread local when declared 'dllexport'}}
+
+// Export in local scope.
+void functionScope() {
+  __declspec(dllexport)        int LocalVarDecl; // expected-error{{'LocalVarDecl' must have external linkage when declared 'dllexport'}}
+  __declspec(dllexport)        int LocalVarDef = 1; // expected-error{{'LocalVarDef' must have external linkage when declared 'dllexport'}}
+  __declspec(dllexport) extern int ExternLocalVarDecl;
+  __declspec(dllexport) static int StaticLocalVar; // expected-error{{'StaticLocalVar' must have external linkage when declared 'dllexport'}}
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// Functions
+//===----------------------------------------------------------------------===//
+
+// Export function declaration. Check different placements.
+__attribute__((dllexport)) void decl1A(); // Sanity check with __attribute__
+__declspec(dllexport)      void decl1B();
+
+void __attribute__((dllexport)) decl2A();
+void __declspec(dllexport)      decl2B();
+
+// Export function definition.
+__declspec(dllexport) void def() {}
+
+// Export inline function.
+__declspec(dllexport) inline void inlineFunc1() {}
+extern void inlineFunc1();
+
+inline void __attribute__((dllexport)) inlineFunc2() {}
+extern void inlineFunc2();
+
+// Redeclarations
+__declspec(dllexport) void redecl1();
+__declspec(dllexport) void redecl1();
+
+__declspec(dllexport) void redecl2();
+                      void redecl2();
+
+__declspec(dllexport) void redecl3();
+                      void redecl3() {}
+
+                      void redecl4(); // expected-note{{previous declaration is here}}
+void useRedecl4() { redecl4(); }
+__declspec(dllexport) void redecl4(); // expected-error{{redeclaration of 'redecl4' cannot add 'dllexport' attribute}}
+
+                      void redecl5(); // expected-note{{previous declaration is here}}
+void useRedecl5() { redecl5(); }
+__declspec(dllexport) inline void redecl5() {} // expected-error{{redeclaration of 'redecl5' cannot add 'dllexport' attribute}}
+
+// Allow with a warning if the decl hasn't been used yet.
+                      void redecl6(); // expected-note{{previous declaration is here}}
+__declspec(dllexport) void redecl6(); // expected-warning{{redeclaration of 'redecl6' should not add 'dllexport' attribute}}
+
+
+// External linkage is required.
+__declspec(dllexport) static int staticFunc(); // expected-error{{'staticFunc' must have external linkage when declared 'dllexport'}}
+
+// Static locals don't count as having external linkage.
+void staticLocalFunc() {
+  __declspec(dllexport) static int staticLocal; // expected-error{{'staticLocal' must have external linkage when declared 'dllexport'}}
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// Precedence
+//===----------------------------------------------------------------------===//
+
+// dllexport takes precedence over dllimport if both are specified.
+__attribute__((dllimport, dllexport))       extern int PrecedenceExternGlobal1A; // expected-warning{{'dllimport' attribute ignored}}
+__declspec(dllimport) __declspec(dllexport) extern int PrecedenceExternGlobal1B; // expected-warning{{'dllimport' attribute ignored}}
+
+__attribute__((dllexport, dllimport))       extern int PrecedenceExternGlobal2A; // expected-warning{{'dllimport' attribute ignored}}
+__declspec(dllexport) __declspec(dllimport) extern int PrecedenceExternGlobal2B; // expected-warning{{'dllimport' attribute ignored}}
+
+__attribute__((dllimport, dllexport))       int PrecedenceGlobal1A; // expected-warning{{'dllimport' attribute ignored}}
+__declspec(dllimport) __declspec(dllexport) int PrecedenceGlobal1B; // expected-warning{{'dllimport' attribute ignored}}
+
+__attribute__((dllexport, dllimport))       int PrecedenceGlobal2A; // expected-warning{{'dllimport' attribute ignored}}
+__declspec(dllexport) __declspec(dllimport) int PrecedenceGlobal2B; // expected-warning{{'dllimport' attribute ignored}}
+
+__declspec(dllexport) extern int PrecedenceExternGlobalRedecl1;
+__declspec(dllimport) extern int PrecedenceExternGlobalRedecl1; // expected-warning{{'dllimport' attribute ignored}}
+
+__declspec(dllimport) extern int PrecedenceExternGlobalRedecl2; // expected-warning{{'dllimport' attribute ignored}}
+__declspec(dllexport) extern int PrecedenceExternGlobalRedecl2;
+
+__declspec(dllexport) extern int PrecedenceGlobalRedecl1;
+__declspec(dllimport)        int PrecedenceGlobalRedecl1; // expected-warning{{'dllimport' attribute ignored}}
+
+__declspec(dllimport) extern int PrecedenceGlobalRedecl2; // expected-warning{{'dllimport' attribute ignored}}
+__declspec(dllexport)        int PrecedenceGlobalRedecl2;
+
+void __attribute__((dllimport, dllexport))       precedence1A() {} // expected-warning{{'dllimport' attribute ignored}}
+void __declspec(dllimport) __declspec(dllexport) precedence1B() {} // expected-warning{{'dllimport' attribute ignored}}
+
+void __attribute__((dllexport, dllimport))       precedence2A() {} // expected-warning{{'dllimport' attribute ignored}}
+void __declspec(dllexport) __declspec(dllimport) precedence2B() {} // expected-warning{{'dllimport' attribute ignored}}
+
+void __declspec(dllimport) precedenceRedecl1(); // expected-warning{{'dllimport' attribute ignored}}
+void __declspec(dllexport) precedenceRedecl1() {}
+
+void __declspec(dllexport) precedenceRedecl2();
+void __declspec(dllimport) precedenceRedecl2() {} // expected-warning{{'dllimport' attribute ignored}}