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.
56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
// RUN: rm -fr %t
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// RUN: mkdir %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/B.cppm -I%t -emit-module-interface -o %t/B.pcm
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// RUN: %clang_cc1 -std=c++20 -fsyntax-only %t/A.cppm -I%t -fprebuilt-module-path=%t -verify
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//
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// RUN: %clang_cc1 -std=c++20 %t/D.cppm -I%t -emit-module-interface -o %t/D.pcm
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// RUN: %clang_cc1 -std=c++20 -fsyntax-only %t/D-part.cppm -I%t -fprebuilt-module-path=%t -verify
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// RUN: %clang_cc1 -std=c++20 %t/B.cppm -I%t -emit-reduced-module-interface -o %t/B.pcm
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// RUN: %clang_cc1 -std=c++20 -fsyntax-only %t/A.cppm -I%t -fprebuilt-module-path=%t -verify
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//
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// RUN: %clang_cc1 -std=c++20 %t/D.cppm -I%t -emit-reduced-module-interface -o %t/D.pcm
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// RUN: %clang_cc1 -std=c++20 -fsyntax-only %t/D-part.cppm -I%t -fprebuilt-module-path=%t -verify
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//--- A.cppm
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module;
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export module baz:A;
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import B;
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#include "C.h"
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//--- B.cppm
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module;
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#include "C.h"
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export module B;
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//--- C.h
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namespace foo {
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template<class T, class U> struct bar { // expected-error {{declaration of 'bar' in module baz:A follows declaration in the global module}} // expected-note {{previous declaration is here}}
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template<class, class> bar(T, U);
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};
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template<class T, class U> bar(T, U) -> bar<T, U>; // expected-error {{declaration of '<deduction guide for bar>' in module baz:A follows declaration in the global module}} // expected-note {{previous declaration is here}}
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}
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//--- D.cppm
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// Tests that it is still problematic if they are in one module.
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module;
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#include "E.h"
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export module D;
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//--- D-part.cppm
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export module D:part;
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import D;
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#include "E.h"
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//--- E.h
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// another file for simpler diagnostics.
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namespace foo {
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template<class T, class U> struct bar { // expected-error {{declaration of 'bar' in module D:part follows declaration in the global module}} // expected-note {{previous declaration is here}}
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template<class, class> bar(T, U);
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};
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template<class T, class U> bar(T, U) -> bar<T, U>; // expected-error {{declaration of '<deduction guide for bar>' in module D:part follows declaration in the global module}} // expected-note {{previous declaration is here}}
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}
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