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.
6 struct S {
7   S();
8   int a, b, c;
9 };
10 
11 struct 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 
18 S C::variadic_sret(const char *f, ...) { return S(); }
19 S C::cdecl_sret() { return S(); }
20 S C::byval_and_sret(S a) { return S(); }
21 
22 // CHECK: define x86_cdeclmethodcc void @"\01?variadic_sret@C@@QAA?AUS@@PBDZZ"(%struct.S* noalias sret %agg.result, %struct.C* %this, i8* %f, ...)
23 // CHECK: define x86_cdeclmethodcc void @"\01?cdecl_sret@C@@QAA?AUS@@XZ"(%struct.S* noalias sret %agg.result, %struct.C* %this)
24 // CHECK: define x86_cdeclmethodcc void @"\01?byval_and_sret@C@@QAA?AUS@@U2@@Z"(%struct.S* noalias sret %agg.result, %struct.C* %this, %struct.S* byval align 4 %a)
25 
26 int 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 x86_cdeclmethodcc void {{.*}} @"\01?variadic_sret@C@@QAA?AUS@@PBDZZ"
34 // CHECK: call x86_cdeclmethodcc void @"\01?cdecl_sret@C@@QAA?AUS@@XZ"
35 // CHECK: call x86_cdeclmethodcc void @"\01?byval_and_sret@C@@QAA?AUS@@U2@@Z"
36