| // RUN: %clang_cc1 -triple i386-pc-win32 -emit-llvm %s -o - | FileCheck %s |
| |
| // PR15768 |
| |
| // A trivial 20 byte struct is returned indirectly and taken as byval. |
| struct S { |
| S(); |
| int a, b, c, d, e; |
| }; |
| |
| struct C { |
| S variadic_sret(const char *f, ...); |
| S __cdecl cdecl_sret(); |
| S __cdecl byval_and_sret(S a); |
| int c; |
| }; |
| |
| S C::variadic_sret(const char *f, ...) { return S(); } |
| S C::cdecl_sret() { return S(); } |
| S C::byval_and_sret(S a) { return S(); } |
| |
| // CHECK: define dso_local void @"?variadic_sret@C@@QAA?AUS@@PBDZZ"(%struct.C* %this, %struct.S* noalias sret %agg.result, i8* %f, ...) |
| // CHECK: define dso_local void @"?cdecl_sret@C@@QAA?AUS@@XZ"(%struct.C* %this, %struct.S* noalias sret %agg.result) |
| // CHECK: define dso_local void @"?byval_and_sret@C@@QAA?AUS@@U2@@Z"(%struct.C* %this, %struct.S* noalias sret %agg.result, %struct.S* byval(%struct.S) align 4 %a) |
| |
| int main() { |
| C c; |
| c.variadic_sret("asdf"); |
| c.cdecl_sret(); |
| c.byval_and_sret(S()); |
| } |
| // CHECK-LABEL: define dso_local i32 @main() |
| // CHECK: call void {{.*}} @"?variadic_sret@C@@QAA?AUS@@PBDZZ" |
| // CHECK: call void @"?cdecl_sret@C@@QAA?AUS@@XZ" |
| // CHECK: call void @"?byval_and_sret@C@@QAA?AUS@@U2@@Z" |
| |
| // __fastcall has similar issues. |
| struct A { |
| S __fastcall f(int x); |
| }; |
| S A::f(int x) { |
| return S(); |
| } |
| // CHECK-LABEL: define dso_local x86_fastcallcc void @"?f@A@@QAI?AUS@@H@Z"(%struct.A* inreg %this, %struct.S* inreg noalias sret %agg.result, i32 %x) |
