| Vedant Kumar | ffd7c88 | 2017-04-14 22:03:34 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=alignment | FileCheck %s |
| 2 | |
| 3 | struct S { |
| 4 | int I; |
| 5 | }; |
| 6 | |
| 7 | extern S g_S; |
| 8 | extern S array_S[]; |
| 9 | |
| 10 | // CHECK-LABEL: define i32 @_Z18load_extern_global |
| 11 | int load_extern_global() { |
| 12 | // FIXME: The IR builder constant-folds the alignment check away to 'true' |
| 13 | // here, so we never call the diagnostic. This is PR32630. |
| 14 | // CHECK-NOT: ptrtoint i32* {{.*}} to i32, !nosanitize |
| 15 | // CHECK: [[I:%.*]] = load i32, i32* getelementptr inbounds (%struct.S, %struct.S* @g_S, i32 0, i32 0), align 4 |
| 16 | // CHECK-NEXT: ret i32 [[I]] |
| 17 | return g_S.I; |
| 18 | } |
| 19 | |
| 20 | // CHECK-LABEL: define i32 @_Z22load_from_extern_array |
| 21 | int load_from_extern_array(int I) { |
| 22 | // CHECK: [[I:%.*]] = getelementptr inbounds %struct.S, %struct.S* {{.*}}, i32 0, i32 0 |
| 23 | // CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint i32* [[I]] to i64, !nosanitize |
| 24 | // CHECK-NEXT: [[AND:%.*]] = and i64 [[PTRTOINT]], 3, !nosanitize |
| 25 | // CHECK-NEXT: [[ICMP:%.*]] = icmp eq i64 [[AND]], 0, !nosanitize |
| 26 | // CHECK-NEXT: br i1 [[ICMP]] |
| 27 | // CHECK: call void @__ubsan_handle_type_mismatch |
| 28 | return array_S[I].I; |
| 29 | } |