da00c60dae
Close https://github.com/llvm/llvm-project/issues/71034 See https://discourse.llvm.org/t/rfc-c-20-modules-introduce-thin-bmi-and-decls-hash/74755 This patch introduces reduced BMI, which doesn't contain the definitions of functions and variables if its definitions won't contribute to the ABI. Testing is a big part of the patch. We want to make sure the reduced BMI contains the same behavior with the existing and relatively stable fatBMI. This is pretty helpful for further reduction. The user interfaces part it left to following patches to ease the reviewing.
61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
// Tests that the ODR check wouldn't produce false-positive result for preferred_name attribute.
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//
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// RUN: rm -rf %t
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// RUN: mkdir -p %t
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// RUN: split-file %s %t
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//
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// RUN: %clang_cc1 -std=c++20 %t/A.cppm -emit-module-interface -o %t/A.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use.cppm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use1.cpp -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use2.cpp -verify -fsyntax-only
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// Test again with reduced BMI.
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// RUN: rm -rf %t
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// RUN: mkdir -p %t
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// RUN: split-file %s %t
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//
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// RUN: %clang_cc1 -std=c++20 %t/A.cppm -emit-reduced-module-interface -o %t/A.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use.cppm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use1.cpp -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use2.cpp -verify -fsyntax-only
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//
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//--- foo.h
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template<class _CharT>
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class foo_templ;
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typedef foo_templ<char> foo;
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template<class _CharT>
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class
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__attribute__((__preferred_name__(foo)))
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foo_templ {
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public:
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foo_templ() {}
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};
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inline foo_templ<char> bar()
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{
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return foo_templ<char>();
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}
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//--- A.cppm
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module;
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#include "foo.h"
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export module A;
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//--- Use.cppm
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// expected-no-diagnostics
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module;
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#include "foo.h"
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export module Use;
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import A;
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//--- Use1.cpp
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import A; // expected-warning@foo.h:8 {{attribute declaration must precede definition}}
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#include "foo.h" // expected-note@foo.h:9 {{previous definition is here}}
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//--- Use2.cpp
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// expected-no-diagnostics
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#include "foo.h"
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import A;
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