37dec10dbc
This commit changes the root from "Simple C/C++ TBAA" to "Simple C++ TBAA" for C++. The problem is that the type name in the TBAA nodes is generated differently for C vs C++. If we link an IR file for C with an IR file for C++, since they have the same root and the type names are different, accesses to the two type nodes will be considered no-alias, even though the two type nodes are from the same type in a header file. The fix is to use different roots for C and C++. Types from C will be treated conservatively in respect to types from C++. Follow-up commits will change the C root to "Simple C TBAA" plus some mangling change for C types to make it a little more aggresive. llvm-svn: 260567
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - -fsanitize=thread %s | FileCheck %s
|
|
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - -O1 %s | FileCheck %s
|
|
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - -O1 -relaxed-aliasing -fsanitize=thread %s | FileCheck %s
|
|
//
|
|
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s --check-prefix=NOTBAA
|
|
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - -O2 -relaxed-aliasing %s | FileCheck %s --check-prefix=NOTBAA
|
|
//
|
|
// Check that we generate TBAA for vtable pointer loads and stores.
|
|
// When -fsanitize=thread 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, int (A::*fp)() const) {
|
|
a->foo();
|
|
(a->*fp)();
|
|
}
|
|
|
|
// CHECK-LABEL: @_Z7CallFoo
|
|
// CHECK: %{{.*}} = load {{.*}} !tbaa ![[NUM:[0-9]+]]
|
|
// CHECK: br i1
|
|
// CHECK: load {{.*}}, !tbaa ![[NUM]]
|
|
//
|
|
// CHECK-LABEL: @_ZN1AC2Ev
|
|
// CHECK: store {{.*}} !tbaa ![[NUM]]
|
|
//
|
|
// CHECK: [[NUM]] = !{[[TYPE:!.*]], [[TYPE]], i64 0}
|
|
// CHECK: [[TYPE]] = !{!"vtable pointer", !{{.*}}
|
|
// NOTBAA-NOT: = !{!"Simple C++ TBAA"}
|