forked from OSchip/llvm-project
97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -emit-llvm -w -o - %s | FileCheck %s
|
|
|
|
// Check differences between the generic Itanium ABI, the AArch32 version and
|
|
// the AArch64 version.
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// The ABI says that the key function is the "textually first, non-inline,
|
|
// non-pure, virtual member function". The generic version decides this after
|
|
// the completion of the class definition; the AArch32 version decides this at
|
|
// the end of the translation unit.
|
|
|
|
// We construct a class which needs a VTable here under generic ABI, but not
|
|
// AArch32.
|
|
|
|
// (see next section for explanation of guard)
|
|
// CHECK: @_ZGVZ15guard_variablesiE4mine = internal global i64 0
|
|
|
|
// CHECK: @_ZTV16CheckKeyFunction =
|
|
struct CheckKeyFunction {
|
|
virtual void foo();
|
|
};
|
|
|
|
// This is not inline when CheckKeyFunction is completed, so
|
|
// CheckKeyFunction::foo is the key function. VTables should be emitted.
|
|
inline void CheckKeyFunction::foo() {
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Guard variables only specify and use the low bit to determine status, rather
|
|
// than the low byte as in the generic Itanium ABI. However, unlike 32-bit ARM,
|
|
// they *are* 64-bits wide so check that in case confusion has occurred.
|
|
|
|
class Guarded {
|
|
public:
|
|
Guarded(int i);
|
|
~Guarded();
|
|
};
|
|
|
|
void guard_variables(int a) {
|
|
static Guarded mine(a);
|
|
// CHECK: [[GUARDBIT:%[0-9]+]] = and i64 {{%[0-9]+}}, 1
|
|
// CHECK: icmp eq i64 [[GUARDBIT]], 0
|
|
|
|
// As guards are 64-bit, these helpers should take 64-bit pointers.
|
|
// CHECK: call i32 @__cxa_guard_acquire(i64*
|
|
// CHECK: call void @__cxa_guard_release(i64*
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Member function pointers use the adj field to distinguish between virtual and
|
|
// nonvirtual members. As a result the adjustment is shifted (if ptr was used, a
|
|
// mask would be expected instead).
|
|
|
|
class C {
|
|
int a();
|
|
virtual int b();
|
|
};
|
|
|
|
|
|
int member_pointer(C &c, int (C::*func)()) {
|
|
// CHECK: ashr i64 %[[MEMPTRADJ:[0-9a-z.]+]], 1
|
|
// CHECK: %[[ISVIRTUAL:[0-9]+]] = and i64 %[[MEMPTRADJ]], 1
|
|
// CHECK: icmp ne i64 %[[ISVIRTUAL]], 0
|
|
return (c.*func)();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// AArch64 PCS says that va_list type is based on "struct __va_list ..." in the
|
|
// std namespace, which means it should mangle as "St9__va_list".
|
|
|
|
// CHECK: @_Z7va_funcSt9__va_list
|
|
void va_func(__builtin_va_list l) {
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// AArch64 constructors (like generic Itanium, but unlike AArch32) do not return
|
|
// "this".
|
|
|
|
void test_constructor() {
|
|
Guarded g(42);
|
|
// CHECK: call void @_ZN7GuardedC1Ei
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// In principle the AArch32 ABI allows this to be accomplished via a call to
|
|
// __aeabi_atexit instead of __cxa_atexit. Clang doesn't make use of this at the
|
|
// moment, but it's definitely not allowed for AArch64.
|
|
|
|
// CHECK: call i32 @__cxa_atexit
|
|
Guarded g(42);
|