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// 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{{.*}} }
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