| // RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=alignment | FileCheck %s |
| |
| struct S { |
| int I; |
| }; |
| |
| extern S g_S; |
| extern S array_S[]; |
| |
| // CHECK-LABEL: define i32 @_Z18load_extern_global |
| int load_extern_global() { |
| // FIXME: The IR builder constant-folds the alignment check away to 'true' |
| // here, so we never call the diagnostic. This is PR32630. |
| // CHECK-NOT: ptrtoint i32* {{.*}} to i32, !nosanitize |
| // CHECK: [[I:%.*]] = load i32, i32* getelementptr inbounds (%struct.S, %struct.S* @g_S, i32 0, i32 0), align 4 |
| // CHECK-NEXT: ret i32 [[I]] |
| return g_S.I; |
| } |
| |
| // CHECK-LABEL: define i32 @_Z22load_from_extern_array |
| int load_from_extern_array(int I) { |
| // CHECK: [[I:%.*]] = getelementptr inbounds %struct.S, %struct.S* {{.*}}, i32 0, i32 0 |
| // CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint i32* [[I]] to i64, !nosanitize |
| // CHECK-NEXT: [[AND:%.*]] = and i64 [[PTRTOINT]], 3, !nosanitize |
| // CHECK-NEXT: [[ICMP:%.*]] = icmp eq i64 [[AND]], 0, !nosanitize |
| // CHECK-NEXT: br i1 [[ICMP]] |
| // CHECK: call void @__ubsan_handle_type_mismatch |
| return array_S[I].I; |
| } |
