diff options
Diffstat (limited to 'test/CodeGenCXX/thunks.cpp')
-rw-r--r-- | test/CodeGenCXX/thunks.cpp | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/test/CodeGenCXX/thunks.cpp b/test/CodeGenCXX/thunks.cpp new file mode 100644 index 0000000..b91ba32 --- /dev/null +++ b/test/CodeGenCXX/thunks.cpp @@ -0,0 +1,137 @@ +// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s + +namespace Test1 { + +// Check that we emit a non-virtual thunk for C::f. + +struct A { + virtual void f(); +}; + +struct B { + virtual void f(); +}; + +struct C : A, B { + virtual void c(); + + virtual void f(); +}; + +// CHECK: define void @_ZThn8_N5Test11C1fEv( +void C::f() { } + +} + +namespace Test2 { + +// Check that we emit a thunk for B::f since it's overriding a virtual base. + +struct A { + virtual void f(); +}; + +struct B : virtual A { + virtual void b(); + virtual void f(); +}; + +// CHECK: define void @_ZTv0_n24_N5Test21B1fEv( +void B::f() { } + +} + +namespace Test3 { + +// Check that we emit a covariant thunk for B::f. + +struct V1 { }; +struct V2 : virtual V1 { }; + +struct A { + virtual V1 *f(); +}; + +struct B : A { + virtual void b(); + + virtual V2 *f(); +}; + +// CHECK: define %{{.*}}* @_ZTch0_v0_n24_N5Test31B1fEv( +V2 *B::f() { return 0; } + +} + +namespace Test4 { + +// Check that the thunk for 'C::f' has the same visibility as the function itself. + +struct A { + virtual void f(); +}; + +struct B { + virtual void f(); +}; + +struct __attribute__((visibility("protected"))) C : A, B { + virtual void c(); + + virtual void f(); +}; + +// CHECK: define protected void @_ZThn8_N5Test41C1fEv( +void C::f() { } + +} + +// This is from Test5: +// CHECK: define linkonce_odr void @_ZTv0_n24_N5Test51B1fEv + +// Check that the thunk gets internal linkage. +namespace { + +struct A { + virtual void f(); +}; + +struct B { + virtual void f(); +}; + +struct C : A, B { + virtual void c(); + + virtual void f(); +}; + +// CHECK: define internal void @_ZThn8_N12_GLOBAL__N_11C1fEv( +void C::f() { } + +} + +// Force C::f to be used. +void f() { + C c; + + c.f(); +} + +namespace Test5 { + +// Check that the thunk for 'B::f' gets the same linkage as the function itself. +struct A { + virtual void f(); +}; + +struct B : virtual A { + virtual void f() { } +}; + +void f(B b) { + b.f(); +} +} + + |