mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-26 06:26:10 +00:00
e9988c36ed
When accessing a field member through a derived-to-base conversion, ensure qualifiers are propagated to the base class subobject. Fixes: https://github.com/llvm/llvm-project/issues/127683.
75 lines
1.3 KiB
C++
75 lines
1.3 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
|
|
struct A {
|
|
void f();
|
|
|
|
int a;
|
|
};
|
|
|
|
struct B : A {
|
|
double b;
|
|
};
|
|
|
|
void f() {
|
|
B b;
|
|
|
|
b.f();
|
|
}
|
|
|
|
// CHECK: define{{.*}} ptr @_Z1fP1A(ptr noundef %a) [[NUW:#[0-9]+]]
|
|
B *f(A *a) {
|
|
// CHECK-NOT: br label
|
|
// CHECK: ret ptr
|
|
return static_cast<B*>(a);
|
|
}
|
|
|
|
// PR5965
|
|
namespace PR5965 {
|
|
|
|
// CHECK: define{{.*}} ptr @_ZN6PR59651fEP1B(ptr noundef %b) [[NUW]]
|
|
A *f(B* b) {
|
|
// CHECK-NOT: br label
|
|
// CHECK: ret ptr
|
|
return b;
|
|
}
|
|
|
|
}
|
|
|
|
// Don't crash on a derived-to-base conversion of an r-value
|
|
// aggregate.
|
|
namespace test3 {
|
|
struct A {};
|
|
struct B : A {};
|
|
|
|
void foo(A a);
|
|
void test() {
|
|
foo(B());
|
|
}
|
|
}
|
|
|
|
// Ensure volatile is preserved during derived-to-base conversion.
|
|
namespace PR127683 {
|
|
|
|
struct Base {
|
|
int Val;
|
|
};
|
|
|
|
struct Derived : Base { };
|
|
|
|
volatile Derived Obj;
|
|
|
|
// CHECK-LABEL: define void @_ZN8PR12768319test_volatile_storeEv()
|
|
// CHECK: store volatile i32 0, ptr @_ZN8PR1276833ObjE, align 4
|
|
void test_volatile_store() {
|
|
Obj.Val = 0;
|
|
}
|
|
|
|
// CHECK-LABEL: define void @_ZN8PR12768318test_volatile_loadEv()
|
|
// CHECK: %0 = load volatile i32, ptr @_ZN8PR1276833ObjE, align 4
|
|
void test_volatile_load() {
|
|
[[maybe_unused]] int Val = Obj.Val;
|
|
}
|
|
|
|
}
|
|
|
|
// CHECK: attributes [[NUW]] = { mustprogress noinline nounwind{{.*}} }
|