| // RUN: %clang_cc1 -triple x86_64-windows-gnu -emit-llvm -o - %s | FileCheck %s |
| // RUN: %clang_cc1 -triple powerpc64le-windows-gnu -emit-llvm -o - %s | FileCheck %s |
| |
| // An empty struct is handled as a struct with a dummy i8, on all targets. |
| // Most targets treat an empty struct return value as essentially void - but |
| // some don't. (Currently, at least x86_64-windows-* and powerpc64le-* don't |
| // treat it as void.) |
| // |
| // When intializing a struct with such a no_unique_address member, make sure we |
| // don't write the dummy i8 into the struct where there's no space allocated for |
| // it. |
| // |
| // This can only be tested with targets that don't treat empty struct returns as |
| // void. |
| |
| struct S {}; |
| S f(); |
| struct Z { |
| int x; |
| [[no_unique_address]] S y; |
| Z(); |
| }; |
| Z::Z() : x(111), y(f()) {} |
| |
| // CHECK: define {{.*}} @_ZN1ZC2Ev |
| // CHECK: %call = call i8 @_Z1fv() |
| // CHECK-NEXT: ret void |
| |
| |
| // Check that the constructor for an empty member gets called with the right |
| // 'this' pointer. |
| |
| struct S2 { |
| S2(); |
| }; |
| struct Z2 { |
| int x; |
| [[no_unique_address]] S2 y; |
| Z2(); |
| }; |
| Z2::Z2() : x(111) {} |
| |
| // CHECK: define {{.*}} @_ZN2Z2C2Ev(ptr {{.*}} %this) |
| // CHECK: %this.addr = alloca ptr |
| // CHECK: store ptr %this, ptr %this.addr |
| // CHECK: %this1 = load ptr, ptr %this.addr |
| // CHECK: call void @_ZN2S2C1Ev(ptr {{.*}} %this1) |
