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