Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 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 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 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) |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 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() |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 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" |
Stephen Hines | c568f1e | 2014-07-21 00:47:37 -0700 | [diff] [blame] | 36 | |
| 37 | // __fastcall has similar issues. |
| 38 | struct A { |
| 39 | S __fastcall f(int x); |
| 40 | }; |
| 41 | S 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) |