| 1 | // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - | FileCheck %s |
|---|
| 2 | |
|---|
| 3 | struct A { |
|---|
| 4 | A(const A&); |
|---|
| 5 | A(); |
|---|
| 6 | ~A(); |
|---|
| 7 | }; |
|---|
| 8 | |
|---|
| 9 | struct B : public A { |
|---|
| 10 | B(); |
|---|
| 11 | B(const B& Other); |
|---|
| 12 | ~B(); |
|---|
| 13 | }; |
|---|
| 14 | |
|---|
| 15 | struct C : public B { |
|---|
| 16 | C(); |
|---|
| 17 | C(const C& Other); |
|---|
| 18 | ~C(); |
|---|
| 19 | }; |
|---|
| 20 | |
|---|
| 21 | struct X { |
|---|
| 22 | operator B&(); |
|---|
| 23 | operator C&(); |
|---|
| 24 | X(const X&); |
|---|
| 25 | X(); |
|---|
| 26 | ~X(); |
|---|
| 27 | B b; |
|---|
| 28 | C c; |
|---|
| 29 | }; |
|---|
| 30 | |
|---|
| 31 | void test0_helper(A); |
|---|
| 32 | void test0(X x) { |
|---|
| 33 | test0_helper(x); |
|---|
| 34 | // CHECK-LABEL: define void @_Z5test01X( |
|---|
| 35 | // CHECK: [[TMP:%.*]] = alloca [[A:%.*]], align |
|---|
| 36 | // CHECK-NEXT: [[T0:%.*]] = call dereferenceable({{[0-9]+}}) [[B:%.*]]* @_ZN1XcvR1BEv( |
|---|
| 37 | // CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]* [[T0]] to [[A]]* |
|---|
| 38 | // CHECK-NEXT: call void @_ZN1AC1ERKS_([[A]]* [[TMP]], [[A]]* dereferenceable({{[0-9]+}}) [[T1]]) |
|---|
| 39 | // CHECK-NEXT: call void @_Z12test0_helper1A([[A]]* [[TMP]]) |
|---|
| 40 | // CHECK-NEXT: call void @_ZN1AD1Ev([[A]]* [[TMP]]) |
|---|
| 41 | // CHECK-NEXT: ret void |
|---|
| 42 | } |
|---|
| 43 | |
|---|
| 44 | struct Base; |
|---|
| 45 | |
|---|
| 46 | struct Root { |
|---|
| 47 | operator Base&(); |
|---|
| 48 | }; |
|---|
| 49 | |
|---|
| 50 | struct Derived; |
|---|
| 51 | |
|---|
| 52 | struct Base : Root { |
|---|
| 53 | Base(const Base &); |
|---|
| 54 | Base(); |
|---|
| 55 | operator Derived &(); |
|---|
| 56 | }; |
|---|
| 57 | |
|---|
| 58 | struct Derived : Base { |
|---|
| 59 | }; |
|---|
| 60 | |
|---|
| 61 | void test1_helper(Base); |
|---|
| 62 | void test1(Derived bb) { |
|---|
| 63 | // CHECK-LABEL: define void @_Z5test17Derived( |
|---|
| 64 | // CHECK-NOT: call {{.*}} @_ZN4BasecvR7DerivedEv( |
|---|
| 65 | // CHECK: call void @_ZN4BaseC1ERKS_( |
|---|
| 66 | // CHECK-NOT: call {{.*}} @_ZN4BasecvR7DerivedEv( |
|---|
| 67 | // CHECK: call void @_Z12test1_helper4Base( |
|---|
| 68 | test1_helper(bb); |
|---|
| 69 | } |
|---|
| 70 | |
|---|
| 71 | // Don't crash after devirtualizing a derived-to-base conversion |
|---|
| 72 | // to an empty base allocated at offset zero. |
|---|
| 73 | // rdar://problem/11993704 |
|---|
| 74 | class Test2a {}; |
|---|
| 75 | class Test2b final : public virtual Test2a {}; |
|---|
| 76 | void test2(Test2b &x) { |
|---|
| 77 | Test2a &y = x; |
|---|
| 78 | // CHECK-LABEL: define void @_Z5test2R6Test2b( |
|---|
| 79 | // CHECK: [[X:%.*]] = alloca [[B:%.*]]*, align 8 |
|---|
| 80 | // CHECK-NEXT: [[Y:%.*]] = alloca [[A:%.*]]*, align 8 |
|---|
| 81 | // CHECK-NEXT: store [[B]]* {{%.*}}, [[B]]** [[X]], align 8 |
|---|
| 82 | // CHECK-NEXT: [[T0:%.*]] = load [[B]]*, [[B]]** [[X]], align 8 |
|---|
| 83 | // CHECK-NEXT: [[T1:%.*]] = bitcast [[B]]* [[T0]] to [[A]]* |
|---|
| 84 | // CHECK-NEXT: store [[A]]* [[T1]], [[A]]** [[Y]], align 8 |
|---|
| 85 | // CHECK-NEXT: ret void |
|---|
| 86 | } |
|---|
| 87 | |
|---|