93 lines · cpp
1// RUN: %clang_cc1 -triple x86_64-windows-msvc -ffreestanding -emit-llvm -O0 \2// RUN: -x c++ -o - %s | FileCheck %s3 4int global_i = 0;5 6// Pass and return object with a reference type (pass directly, return indirectly).7// CHECK: define dso_local void @"?f1@@YA?AUS1@@XZ"(ptr dead_on_unwind noalias writable sret(%struct.S1) align 8 {{.*}})8// CHECK: call void @"?func1@@YA?AUS1@@U1@@Z"(ptr dead_on_unwind writable sret(%struct.S1) align 8 {{.*}}, i64 {{.*}})9struct S1 {10 int& r;11};12 13S1 func1(S1 x);14S1 f1() {15 S1 x{ global_i };16 return func1(x);17}18 19// Pass and return object with a reference type within an inner struct (pass directly, return indirectly).20// CHECK: define dso_local void @"?f2@@YA?AUS2@@XZ"(ptr dead_on_unwind noalias writable sret(%struct.S2) align 8 {{.*}})21// CHECK: call void @"?func2@@YA?AUS2@@U1@@Z"(ptr dead_on_unwind writable sret(%struct.S2) align 8 {{.*}}, i64 {{.*}})22struct Inner {23 int& r;24};25 26struct S2 {27 Inner i;28};29 30S2 func2(S2 x);31S2 f2() {32 S2 x{ { global_i } };33 return func2(x);34}35 36// Pass and return object with a reference type (pass directly, return indirectly).37// CHECK: define dso_local void @"?f3@@YA?AUS3@@XZ"(ptr dead_on_unwind noalias writable sret(%struct.S3) align 8 {{.*}})38// CHECK: call void @"?func3@@YA?AUS3@@U1@@Z"(ptr dead_on_unwind writable sret(%struct.S3) align 8 {{.*}}, i64 {{.*}})39struct S3 {40 const int& r;41};42 43S3 func3(S3 x);44S3 f3() {45 S3 x{ global_i };46 return func3(x);47}48 49// Pass and return object with a reference type within an inner struct (pass directly, return indirectly).50// CHECK: define dso_local void @"?f4@@YA?AUS4@@XZ"(ptr dead_on_unwind noalias writable sret(%struct.S4) align 8 {{.*}})51// CHECK: call void @"?func4@@YA?AUS4@@U1@@Z"(ptr dead_on_unwind writable sret(%struct.S4) align 8 {{.*}}, i64 {{.*}})52struct InnerConst {53 const int& r;54};55 56struct S4 {57 InnerConst i;58};59 60S4 func4(S4 x);61S4 f4() {62 S4 x{ { global_i } };63 return func4(x);64}65 66// Pass and return an object with an explicitly deleted copy assignment operator (pass directly, return indirectly).67// CHECK: define dso_local void @"?f5@@YA?AUS5@@XZ"(ptr dead_on_unwind noalias writable sret(%struct.S5) align 4 {{.*}})68// CHECK: call void @"?func5@@YA?AUS5@@U1@@Z"(ptr dead_on_unwind writable sret(%struct.S5) align 4 {{.*}}, i32 {{.*}})69struct S5 {70 S5& operator=(const S5&) = delete;71 int i;72};73 74S5 func5(S5 x);75S5 f5() {76 S5 x{ 1 };77 return func5(x);78}79 80// Pass and return an object with an explicitly defaulted copy assignment operator that is implicitly deleted (pass directly, return indirectly).81// CHECK: define dso_local void @"?f6@@YA?AUS6@@XZ"(ptr dead_on_unwind noalias writable sret(%struct.S6) align 8 {{.*}})82// CHECK: call void @"?func6@@YA?AUS6@@U1@@Z"(ptr dead_on_unwind writable sret(%struct.S6) align 8 {{.*}}, i64 {{.*}})83struct S6 {84 S6& operator=(const S6&) = default;85 int& i;86};87 88S6 func6(S6 x);89S6 f6() {90 S6 x{ global_i };91 return func6(x);92}93