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.
58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
// 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/Templ.cppm -emit-module-interface -o %t/Templ.pcm
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// RUN: %clang_cc1 -std=c++20 %t/Use.cppm -fprebuilt-module-path=%t -emit-module-interface -o %t/Use.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use.cpp -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 %t/Templ.cppm -emit-reduced-module-interface -o %t/Templ.pcm
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// RUN: %clang_cc1 -std=c++20 %t/Use.cppm -fprebuilt-module-path=%t -emit-reduced-module-interface -o %t/Use.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t -I%t %t/Use.cpp -verify -fsyntax-only
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//
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//--- Templ.h
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#ifndef TEMPL_H
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#define TEMPL_H
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template <class T>
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class Wrapper {
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public:
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T value;
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};
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#endif
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//--- Templ.cppm
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export module Templ;
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export template <class T>
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class Wrapper2 {
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public:
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T value;
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};
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//--- Use.cppm
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module;
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#include "Templ.h"
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export module Use;
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import Templ;
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export template <class T>
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class Use {
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public:
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Wrapper<T> value;
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Wrapper2<T> value2;
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};
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export template <class T>
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Wrapper<T> wrapper;
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//--- Use.cpp
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// expected-no-diagnostics
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module;
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#include "Templ.h"
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export module User;
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export template <class T>
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class User {
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public:
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Wrapper<T> value;
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};
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