| 1 | // RUN: %clang_cc1 -triple=i686 -emit-llvm -o - %s | FileCheck %s |
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| 2 | |
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| 3 | |
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| 4 | struct X; |
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| 5 | typedef void (X::*memptr)(); |
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| 6 | |
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| 7 | struct A { |
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| 8 | virtual memptr f(); |
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| 9 | }; |
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| 10 | |
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| 11 | struct B { |
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| 12 | virtual memptr f(); |
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| 13 | }; |
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| 14 | |
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| 15 | struct C : A, B { |
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| 16 | C(); |
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| 17 | memptr f() override __attribute__((noinline)) { return nullptr; }; |
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| 18 | }; |
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| 19 | |
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| 20 | C::C() {} |
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| 21 | |
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| 22 | // Make sure the member pointer is returned from the thunk via the return slot. |
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| 23 | // Because of the tail call, the return value cannot be copied into a local |
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| 24 | // alloca. (PR39901) |
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| 25 | |
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| 26 | // CHECK-LABEL: define linkonce_odr void @_ZThn4_N1C1fEv({ i32, i32 }* noalias sret %agg.result, %struct.C* %this) |
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| 27 | // CHECK: tail call void @_ZN1C1fEv({ i32, i32 }* sret %agg.result |
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| 28 | |
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