e0ac46e69d
This reverts commit d618f1c3b1.
This commit wasn't reviewed ahead of time and significant concerns were
raised immediately after it landed. According to our developer policy
this warrants immediate revert of the commit.
https://llvm.org/docs/DeveloperPolicy.html#patch-reversion-policy
Differential Revision: https://reviews.llvm.org/D155509
88 lines
2.1 KiB
C++
88 lines
2.1 KiB
C++
// 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-SAME: ptr noundef [[ARG:%.*]])
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// CHECK: [[ARG_ADDR:%.*]] = alloca ptr
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// CHECK-NEXT: [[TMP:%.*]] = alloca [[A:%.*]], align
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// CHECK-NEXT: store ptr [[ARG]], ptr [[ARG_ADDR]]
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// CHECK-NEXT: [[T0:%.*]] = call noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) ptr @_ZN1XcvR1BEv(
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// CHECK-NEXT: call void @_ZN1AC1ERKS_(ptr {{[^,]*}} [[TMP]], ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) [[T0]])
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// CHECK-NEXT: call void @_Z12test0_helper1A(ptr noundef [[TMP]])
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr {{[^,]*}} [[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 ptr, align 8
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// CHECK-NEXT: [[Y:%.*]] = alloca ptr, align 8
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// CHECK-NEXT: store ptr {{%.*}}, ptr [[X]], align 8
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// CHECK-NEXT: [[T0:%.*]] = load ptr, ptr [[X]], align 8
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// CHECK-NEXT: store ptr [[T0]], ptr [[Y]], align 8
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// CHECK-NEXT: ret void
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}
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