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.
73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
// From https://github.com/llvm/llvm-project/issues/61317
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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 %t/B.cppm -emit-module-interface -o %t/B.pcm \
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// RUN: -fprebuilt-module-path=%t
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// RUN: %clang_cc1 -std=c++20 %t/Use.cpp -fprebuilt-module-path=%t -fsyntax-only -verify
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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 %t/B.cppm -emit-reduced-module-interface -o %t/B.pcm \
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// RUN: -fprebuilt-module-path=%t
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// RUN: %clang_cc1 -std=c++20 %t/Use.cpp -fprebuilt-module-path=%t -fsyntax-only -verify
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//--- foo.h
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#ifndef _FOO
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#define _FOO
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template <typename T> struct Foo {
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Foo(T f) {}
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};
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template <typename T> Foo(T&) -> Foo<T>;
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struct Bar {
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template <typename T>
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requires requires { Foo{T()}; }
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void baz() const {}
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};
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template <typename T> struct Foo2 {
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Foo2(T f) {}
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};
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struct Bar2 {
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template <typename T>
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requires requires { Foo2{T()}; }
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void baz2() const {}
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};
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#endif
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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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export using ::Foo;
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export using ::Bar;
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export using ::Bar2;
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//--- B.cppm
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module;
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#include "foo.h"
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export module B;
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export import A;
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//--- Use.cpp
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// expected-no-diagnostics
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import A;
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import B;
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void use() {
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Bar _;
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_.baz<int>();
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Bar2 __;
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__.baz2<int>();
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}
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