1// RUN: %clang_cc1 -triple i386-pc-win32 -emit-llvm %s -o - | FileCheck %s 2 3// PR15768 4 5// A trivial 12 byte struct is returned indirectly. 6struct S { 7 S(); 8 int a, b, c; 9}; 10 11struct C { 12 S variadic_sret(const char *f, ...); 13 S __cdecl cdecl_sret(); 14 S __cdecl byval_and_sret(S a); 15 int c; 16}; 17 18S C::variadic_sret(const char *f, ...) { return S(); } 19S C::cdecl_sret() { return S(); } 20S C::byval_and_sret(S a) { return S(); } 21 22// CHECK: define void @"\01?variadic_sret@C@@QAA?AUS@@PBDZZ"(%struct.C* %this, %struct.S* noalias sret %agg.result, i8* %f, ...) 23// CHECK: define void @"\01?cdecl_sret@C@@QAA?AUS@@XZ"(%struct.C* %this, %struct.S* noalias sret %agg.result) 24// CHECK: define void @"\01?byval_and_sret@C@@QAA?AUS@@U2@@Z"(%struct.C* %this, %struct.S* noalias sret %agg.result, %struct.S* byval align 4 %a) 25 26int main() { 27 C c; 28 c.variadic_sret("asdf"); 29 c.cdecl_sret(); 30 c.byval_and_sret(S()); 31} 32// CHECK-LABEL: define i32 @main() 33// CHECK: call void {{.*}} @"\01?variadic_sret@C@@QAA?AUS@@PBDZZ" 34// CHECK: call void @"\01?cdecl_sret@C@@QAA?AUS@@XZ" 35// CHECK: call void @"\01?byval_and_sret@C@@QAA?AUS@@U2@@Z" 36 37// __fastcall has similar issues. 38struct A { 39 S __fastcall f(int x); 40}; 41S A::f(int x) { 42 return S(); 43} 44// CHECK-LABEL: define x86_fastcallcc void @"\01?f@A@@QAI?AUS@@H@Z"(%struct.A* inreg %this, %struct.S* inreg noalias sret %agg.result, i32 %x) 45