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.
64 lines
1.3 KiB
C++
64 lines
1.3 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 -emit-module-interface %t/foo.cppm -o %t/foo.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/Use.cpp -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 -emit-reduced-module-interface %t/foo.cppm -o %t/foo.pcm
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// RUN: %clang_cc1 -std=c++20 -fprebuilt-module-path=%t %t/Use.cpp -verify -fsyntax-only
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//--- foo.cppm
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module;
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# 3 __FILE__ 1 // use the next physical line number here (and below)
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template <typename T>
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void foo() {
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}
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template <>
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void foo<int>() {
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}
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template <typename T>
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void foo2() {
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}
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template <>
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void foo2<int>() {
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}
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template <typename T>
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void foo3() {
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}
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template <>
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void foo3<int>();
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export module foo;
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export using ::foo;
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export using ::foo3;
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export template <typename T>
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void foo4() {
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}
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export template <>
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void foo4<int>() {
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}
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//--- Use.cpp
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import foo;
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void use() {
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foo<short>();
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foo<int>();
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foo2<short>(); // expected-error {{missing '#include'; 'foo2' must be declared before it is used}}
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// expected-note@* {{declaration here is not visible}}
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foo2<int>(); // expected-error {{missing '#include'; 'foo2' must be declared before it is used}}
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// expected-note@* {{declaration here is not visible}}
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foo3<short>();
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foo3<int>();
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foo4<short>();
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foo4<int>();
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}
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