tbaa-for-vptr.cpp   [plain text]

// RUN: %clang_cc1 -emit-llvm -o - -O0 -fthread-sanitizer %s | FileCheck %s
// RUN: %clang_cc1 -emit-llvm -o - -O1 %s | FileCheck %s
// RUN: %clang_cc1 -emit-llvm -o - -O1  -relaxed-aliasing -fthread-sanitizer %s | FileCheck %s
//
// RUN: %clang_cc1 -emit-llvm -o - -O0 %s | FileCheck %s --check-prefix=NOTBAA
// RUN: %clang_cc1 -emit-llvm -o - -O2  -relaxed-aliasing %s | FileCheck %s --check-prefix=NOTBAA
//
// Check that we generate TBAA for vtable pointer loads and stores.
// When -fthread-sanitizer is used TBAA should be generated at all opt levels
// even if -relaxed-aliasing is present.
struct A {
  virtual int foo() const ;
  virtual ~A();
};

void CreateA() {
  new A;
}

void CallFoo(A *a) {
  a->foo();
}

// CHECK: %{{.*}} = load {{.*}} !tbaa ![[NUM:[0-9]+]]
// CHECK: store {{.*}} !tbaa ![[NUM]]
// CHECK: [[NUM]] = metadata !{metadata !"vtable pointer", metadata !{{.*}}}
// NOTBAA-NOT: = metadata !{metadata !"Simple C/C++ TBAA"}