| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o - | FileCheck %s --check-prefix=CIR |
| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o - | FileCheck %s --check-prefix=LLVM |
| // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=OGCG |
| |
| // Empty union (no padding, size 0 in CIR) |
| union Empty {}; |
| // CIR: !rec_Empty = !cir.record<union "Empty" {}> |
| // LLVM: %union.Empty = type {} |
| // OGCG: %union.Empty = type {} |
| |
| // Aligned empty union (size 0, alignment 16) |
| union EmptyAligned {} __attribute__((aligned(16))); |
| // CIR: !rec_EmptyAligned = !cir.record<union "EmptyAligned" {}> |
| // LLVM: %union.EmptyAligned = type {} |
| // OGCG: %union.EmptyAligned = type {} |
| |
| void useEmpty() { |
| union Empty e; |
| } |
| // CIR: cir.func {{.*}}@useEmpty() |
| // CIR: cir.alloca !rec_Empty, !cir.ptr<!rec_Empty>, ["e"] {alignment = 1 : i64} |
| // LLVM: define {{.*}} void @useEmpty() |
| // LLVM: alloca %union.Empty, i64 1, align 1 |
| // OGCG: define {{.*}} void @useEmpty() |
| // OGCG: alloca %union.Empty, align 1 |
| |
| void useEmptyAligned() { |
| union EmptyAligned e; |
| } |
| // CIR: cir.func {{.*}}@useEmptyAligned() |
| // CIR: cir.alloca !rec_EmptyAligned, !cir.ptr<!rec_EmptyAligned>, ["e"] {alignment = 16 : i64} |
| // LLVM: define {{.*}} void @useEmptyAligned() |
| // LLVM: alloca %union.EmptyAligned, i64 1, align 16 |
| // OGCG: define {{.*}} void @useEmptyAligned() |
| // OGCG: alloca %union.EmptyAligned, align 16 |
