5 …[[clang::musttail]] ReturnsInt1();              // expected-error {{'musttail' attribute only appl…  in Func1()
6 …[[clang::musttail(1, 2)]] return ReturnsInt1(); // expected-error {{'musttail' attribute takes no …  in Func1()
7 …[[clang::musttail]] return 5;                   // expected-error {{'musttail' attribute requires …  in Func1()
8   [[clang::musttail]] return ReturnsInt1();  in Func1()
12 …[[clang::musttail]] return; // expected-error {{'musttail' attribute requires that the return valu…  in NoFunctionCall()
15 [[clang::musttail]] static int int_val = ReturnsInt1(); // expected-error {{'musttail' attribute ca…
19   [[clang::musttail]] // expected-note {{tail call required by 'musttail' attribute here}}  in TestParamArityMismatch()
25   [[clang::musttail]]  // expected-note {{tail call required by 'musttail' attribute here}}  in TestParamTypeMismatch()
31   [[clang::musttail]]   // expected-note {{tail call required by 'musttail' attribute here}}  in TestReturnTypeMismatch()
40   [[clang::musttail]]         // expected-note {{tail call required by 'musttail' attribute here}}  in TestNonMemberToMember()
47     [[clang::musttail]]   // expected-note {{tail call required by 'musttail' attribute here}}  in TestMemberToNonMember()
61 …[[clang::musttail]] return ReturnsVoid(); // expected-error {{cannot perform a tail call from this…  in TestNonTrivialDestructorInScope()
66 …[[clang::musttail]] return NonTrivialParam(x); // expected-error {{tail call requires that the ret…  in TestNonTrivialParam()
74 …[[clang::musttail]] return (ReturnsNonTrivialValue()); // expected-error {{tail call requires that…  in TestReturnsNonTrivialValue()
78 …[[clang::musttail]] return HasNonTrivialDestructor(); // expected-error {{'musttail' attribute req…  in TestReturnsNonTrivialNonFunctionCall()
86 …[[clang::musttail]]            // expected-note {{tail call required by 'musttail' attribute here}}  in TestUsesPointerToMember()
96       [[clang::musttail]] return ReturnsVoid2();  in TestNestedClass()
106   [[clang::musttail]] return TemplateFunc<int>(x);  in OkTemplateFunc()
110   [[clang::musttail]]          // expected-note {{tail call required by 'musttail' attribute here}}  in BadTemplateFunc()
120 …[[clang::musttail]] return IntParam(x); // expected-error {{cannot perform a tail call from this r…  in TestVLA()
124 …[[clang::musttail]] return IntParam(NonTrivialParam(HasNonTrivialDestructor())); // expected-error…  in TestNonTrivialDestructorSubArg()
129 …[[clang::musttail]] return VariadicFunction(x); // expected-error {{'musttail' attribute may not b…  in TestVariadicFunction()
135   [[clang::musttail]]        // expected-note {{tail call required by 'musttail' attribute here}}  in TestIntParamMismatch()
139   [[clang::musttail]]      // expected-note {{tail call required by 'musttail' attribute here}}  in TestIntParamMismatch2()
149     [[clang::musttail]]        // expected-note {{tail call required by 'musttail' attribute here}}  in FromFunction()
156   [[clang::musttail]]         // expected-note {{tail call required by 'musttail' attribute here}}  in TestMismatchCallingConvention()
162 …[[clang::musttail]]                // expected-note {{tail call required by 'musttail' attribute h…  in TestNonCapturingLambda()
167   [[clang::musttail]] return lambda_fptr();  in TestNonCapturingLambda()
168   [[clang::musttail]] return (+lambda)();  in TestNonCapturingLambda()
174 …[[clang::musttail]]                 // expected-note {{tail call required by 'musttail' attribute …  in TestCapturingLambda()
179 …[[clang::musttail]] return TakesIntParam(HasNonTrivialDestructor().ReturnsInt()); // expected-erro…  in TestNonTrivialTemporary()
185     [[clang::musttail]]   // expected-note {{tail call required by 'musttail' attribute here}}  in ~TestDestructor()
192 …[[clang::musttail]]                  // expected-note {{tail call required by 'musttail' attribute…  in TestExplicitDestructorCall()
204 …[[clang::musttail]] return HasNonTrivialCopyConstructor(ReturnsClassByValue()); // expected-error{…  in TestNonElidableCopyConstructor()
211 …[[clang::musttail]]                                    // expected-note {{tail call required by 'm…  in TestExplicitConstructorCall()
218 …[[clang::musttail]] return ReturnsVoid2(); // expected-error {{cannot perform a tail call from thi…  in TestStatementExpression()
225 …[[clang::musttail]] return ReturnsVoid2(); // expected-error {{cannot perform a tail call from thi…  in TestTryBlock()
233 …[[clang::musttail]]            // expected-note {{tail call required by 'musttail' attribute here}}  in TestRValueFunctionPointer()
240   [[clang::musttail]] // expected-note {{tail call required by 'musttail' attribute here}}  in TestPseudoDestructor()
252   [[clang::musttail]]           // expected-note{{tail call required by 'musttail' attribute here}}  in TestReturnsPMF()
262 …[[clang::musttail]] return ((*this)->*pmf)(); // expected-error {{left hand operand to ->* must be…  in BadPMF()
268 …[[clang::musttail]] return ns; // expected-error {{unexpected namespace name 'ns': expected expres…  in TestCallNonValue()