1 // RUN: %clang_cc1 -emit-llvm -o - -fsanitize=thread %s | FileCheck %s
2 // RUN: %clang_cc1 -emit-llvm -o - -O1 %s | FileCheck %s
3 // RUN: %clang_cc1 -emit-llvm -o - -O1  -relaxed-aliasing -fsanitize=thread %s | FileCheck %s
4 //
5 // RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s --check-prefix=NOTBAA
6 // RUN: %clang_cc1 -emit-llvm -o - -O2  -relaxed-aliasing %s | FileCheck %s --check-prefix=NOTBAA
7 //
8 // Check that we generate TBAA for vtable pointer loads and stores.
9 // When -fthread-sanitizer is used TBAA should be generated at all opt levels
10 // even if -relaxed-aliasing is present.
11 struct A {
12   virtual int foo() const ;
13   virtual ~A();
14 };
15 
16 void CreateA() {
17   new A;
18 }
19 
20 void CallFoo(A *a) {
21   a->foo();
22 }
23 
24 // CHECK: %{{.*}} = load {{.*}} !tbaa ![[NUM:[0-9]+]]
25 // CHECK: store {{.*}} !tbaa ![[NUM]]
26 // CHECK: [[NUM]] = metadata !{metadata [[TYPE:!.*]], metadata [[TYPE]], i64 0}
27 // CHECK: [[TYPE]] = metadata !{metadata !"vtable pointer", metadata !{{.*}}
28 // NOTBAA-NOT: = metadata !{metadata !"Simple C/C++ TBAA"}
29