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.
65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
// https://github.com/llvm/llvm-project/issues/54457
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//
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// RUN: rm -rf %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/A.cppm -verify -S -o -
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// RUN: %clang_cc1 -std=c++20 %t/B.cppm -verify -S -o -
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// RUN: %clang_cc1 -std=c++20 %t/C.cppm -emit-module-interface -o %t/C.pcm
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// RUN: %clang_cc1 -std=c++20 %t/UseC.cppm -fprebuilt-module-path=%t -verify -S -o -
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// RUN: %clang_cc1 -std=c++20 %t/C.cppm -emit-reduced-module-interface -o %t/C.pcm
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// RUN: %clang_cc1 -std=c++20 %t/UseC.cppm -fprebuilt-module-path=%t -verify -S -o -
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//--- A.cppm
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// expected-no-diagnostics
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export module A;
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export template<typename T>
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struct s {
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friend s f(s) {
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return s();
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}
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};
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void g() {
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f(s<int>());
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}
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//--- B.cppm
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// expected-no-diagnostics
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export module B;
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export template<typename T>
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struct s {
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friend constexpr auto f(s) -> s {
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return s();
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}
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};
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void g() {
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constexpr auto first = f(s<int>());
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}
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//--- C.cppm
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// expected-no-diagnostics
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export module C;
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export template<typename StandardCharT, int N>
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struct basic_symbol_text {
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template<int N2>
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constexpr friend basic_symbol_text operator+(
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const basic_symbol_text&, const basic_symbol_text<char, N2>&) noexcept
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{
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return basic_symbol_text{};
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}
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};
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constexpr auto xxx = basic_symbol_text<char, 1>{} + basic_symbol_text<char, 1>{};
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//--- UseC.cppm
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// expected-no-diagnostics
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import C;
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void foo() {}
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