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// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - | FileCheck %s
struct A {
A(const A&);
A();
~A();
};
struct B : public A {
B();
B(const B& Other);
~B();
};
struct C : public B {
C();
C(const C& Other);
~C();
};
struct X {
operator B&();
operator C&();
X(const X&);
X();
~X();
B b;
C c;
};
void test0_helper(A);
void test0(X x) {
test0_helper(x);
// CHECK-LABEL: define void @_Z5test01X(
// CHECK: [[TMP:%.*]] = alloca [[A:%.*]], align
// CHECK-NEXT: [[T0:%.*]] = call dereferenceable({{[0-9]+}}) [[B:%.*]]* @_ZN1XcvR1BEv(
// CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]* [[T0]] to [[A]]*
// CHECK-NEXT: call void @_ZN1AC1ERKS_([[A]]* [[TMP]], [[A]]* dereferenceable({{[0-9]+}}) [[T1]])
// CHECK-NEXT: call void @_Z12test0_helper1A([[A]]* [[TMP]])
// CHECK-NEXT: call void @_ZN1AD1Ev([[A]]* [[TMP]])
// CHECK-NEXT: ret void
}
struct Base;
struct Root {
operator Base&();
};
struct Derived;
struct Base : Root {
Base(const Base &);
Base();
operator Derived &();
};
struct Derived : Base {
};
void test1_helper(Base);
void test1(Derived bb) {
// CHECK-LABEL: define void @_Z5test17Derived(
// CHECK-NOT: call {{.*}} @_ZN4BasecvR7DerivedEv(
// CHECK: call void @_ZN4BaseC1ERKS_(
// CHECK-NOT: call {{.*}} @_ZN4BasecvR7DerivedEv(
// CHECK: call void @_Z12test1_helper4Base(
test1_helper(bb);
}
// Don't crash after devirtualizing a derived-to-base conversion
// to an empty base allocated at offset zero.
// rdar://problem/11993704
class Test2a {};
class Test2b final : public virtual Test2a {};
void test2(Test2b &x) {
Test2a &y = x;
// CHECK-LABEL: define void @_Z5test2R6Test2b(
// CHECK: [[X:%.*]] = alloca [[B:%.*]]*, align 8
// CHECK-NEXT: [[Y:%.*]] = alloca [[A:%.*]]*, align 8
// CHECK-NEXT: store [[B]]* {{%.*}}, [[B]]** [[X]], align 8
// CHECK-NEXT: [[T0:%.*]] = load [[B]]*, [[B]]** [[X]], align 8
// CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]* [[T0]] to [[A]]*
// CHECK-NEXT: store [[A]]* [[T1]], [[A]]** [[Y]], align 8
// CHECK-NEXT: ret void
}
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