e2467b7aed
explicitly instantiated, still emit it with each use. We don't emit a definition of the member with an explicit instantiation definition (and indeed it appears that we're not allowed to, since an explicit instantiation definition does not constitute an odr-use and only odr-use permits definition for defaulted special members). So we still need to emit a weak definition with each use. This also makes defaulted-in-class declarations behave more like implicitly-declared special members, which matches their design intent. And it matches the way this problem was solved in GCC. llvm-svn: 318474
49 lines
1010 B
C++
49 lines
1010 B
C++
// RUN: %clang_cc1 %s -std=c++11 -emit-llvm -o - -triple=i686-linux-gnu | FileCheck %s
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struct A {
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A(const A&);
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A &operator=(const A&);
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};
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struct B {
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A a;
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B(B&&) = default;
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B &operator=(B&&) = default;
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};
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// CHECK: define {{.*}} @_Z2f1
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void f1(B &x) {
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// CHECK-NOT: memcpy
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// CHECK: call {{.*}} @_ZN1BC1EOS_(
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B b(static_cast<B&&>(x));
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}
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// CHECK: define {{.*}} @_Z2f2
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void f2(B &x, B &y) {
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// CHECK-NOT: memcpy
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// CHECK: call {{.*}} @_ZN1BaSEOS_(
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x = static_cast<B&&>(y);
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}
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// CHECK: define {{.*}} @_ZN1BaSEOS_(
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// CHECK: call {{.*}} @_ZN1AaSERKS_(
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// rdar://18309639 {
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template<int> struct C { C() = default; };
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struct D {
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C<0> c;
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D() { }
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};
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template struct C<0>; // was asserting
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void f3() {
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C<0> a;
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D b;
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}
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// Trivial default ctor, might or might not be defined, but we must not expect
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// someone else ot define it.
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// CHECK-NOT: declare {{.*}} @_ZN1CILi0EEC1Ev
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// CHECK: define {{.*}} @_ZN1DC1Ev
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// CHECK: define {{.*}} @_ZN1BC2EOS_(
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// CHECK: call {{.*}} @_ZN1AC1ERKS_(
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