llvm-project/clang/test/Modules/class-instantiate-no-change.cppm
Chuanqi Xu 2451172df7
[C++20] [Modules] Don't update MarkAsUsed information for decls from named modules (#174687)
Declarations from named modules are used naturally. Thet are
declarations in other TU. We don't need to record the information for
updating them.
2026-01-07 06:57:40 +00:00

51 lines
1.1 KiB
C++

// RUN: rm -rf %t
// RUN: mkdir -p %t
// RUN: split-file %s %t
// RUN: %clang_cc1 -std=c++20 %t/impl.cppm -emit-reduced-module-interface -o %t/impl.pcm
// RUN: %clang_cc1 -std=c++20 %t/impl.v2.cppm -emit-reduced-module-interface -o %t/impl.v2.pcm
// RUN: %clang_cc1 -std=c++20 %t/m.cppm -emit-reduced-module-interface -o %t/m.pcm \
// RUN: -fmodule-file=impl=%t/impl.pcm
// RUN: %clang_cc1 -std=c++20 %t/m.cppm -emit-reduced-module-interface -o %t/m.v2.pcm \
// RUN: -fmodule-file=impl=%t/impl.v2.pcm
// Since m only uses impl in the definition, the change in impl shouldn't affect m.
// RUN: diff %t/m.pcm %t/m.v2.pcm &> /dev/null
//--- impl.cppm
export module impl;
export struct Impl {
Impl() {}
Impl(const Impl &) {}
~Impl() {}
int get() {
return 43;
}
};
//--- impl.v2.cppm
export module impl;
export struct Impl {
Impl() {}
Impl(const Impl &) {}
~Impl() {}
int get() {
return 43;
}
};
export struct ImplV2 {
int get() {
return 43;
}
};
//--- m.cppm
export module m;
import impl;
export int interface() {
Impl impl;
return impl.get();
};