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.
111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
// https://github.com/llvm/llvm-project/issues/60775
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//
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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 -I%t -emit-module-interface -o %t/a.pcm
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// RUN: %clang_cc1 -std=c++20 %t/b.cpp -fmodule-file=a=%t/a.pcm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 %t/c.cppm -I%t -emit-module-interface -o %t/c.pcm
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// RUN: %clang_cc1 -std=c++20 %t/d.cppm -emit-module-interface -fmodule-file=c=%t/c.pcm -o %t/d.pcm
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// RUN: %clang_cc1 -std=c++20 %t/e.cpp -fmodule-file=d=%t/d.pcm -fmodule-file=c=%t/c.pcm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 %t/f.cppm -emit-module-interface -fmodule-file=c=%t/c.pcm -o %t/f.pcm
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// RUN: %clang_cc1 -std=c++20 %t/g.cpp -fmodule-file=f=%t/f.pcm -fmodule-file=c=%t/c.pcm -verify -fsyntax-only
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// Test again with reduced BMI
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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 -I%t -emit-reduced-module-interface -o %t/a.pcm
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// RUN: %clang_cc1 -std=c++20 %t/b.cpp -fmodule-file=a=%t/a.pcm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 %t/c.cppm -I%t -emit-reduced-module-interface -o %t/c.pcm
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// RUN: %clang_cc1 -std=c++20 %t/d.cppm -emit-reduced-module-interface -fmodule-file=c=%t/c.pcm -o %t/d.pcm
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// RUN: %clang_cc1 -std=c++20 %t/e.cpp -fmodule-file=d=%t/d.pcm -fmodule-file=c=%t/c.pcm -verify -fsyntax-only
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// RUN: %clang_cc1 -std=c++20 %t/f.cppm -emit-reduced-module-interface -fmodule-file=c=%t/c.pcm -o %t/f.pcm
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// RUN: %clang_cc1 -std=c++20 %t/g.cpp -fmodule-file=f=%t/f.pcm -fmodule-file=c=%t/c.pcm -verify -fsyntax-only
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//--- initializer_list.h
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namespace std {
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typedef decltype(sizeof(int)) size_t;
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template<typename T> struct initializer_list {
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initializer_list(const T *, size_t);
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T* begin();
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T* end();
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};
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}
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//--- a.cppm
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module;
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#include "initializer_list.h"
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export module a;
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export template<typename>
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void a() {
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for (int x : {0}) {
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}
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}
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//--- b.cpp
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// expected-no-diagnostics
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import a;
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void b() {
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a<int>();
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}
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//--- c.cppm
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module;
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#include "initializer_list.h"
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export module c;
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namespace std {
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export using std::initializer_list;
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}
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//--- d.cppm
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export module d;
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import c;
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export template<typename>
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void d() {
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for (int x : {0}) {
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}
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}
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//--- e.cpp
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import d;
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void e() {
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for (int x : {0}) { // expected-error {{cannot deduce type of initializer list because std::initializer_list was not found; include <initializer_list>}}
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}
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}
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template <typename>
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void ee() {
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for (int x : {0}) { // expected-error {{cannot deduce type of initializer list because std::initializer_list was not found; include <initializer_list>}}
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}
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}
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void eee() {
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ee<int>();
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d<int>();
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}
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//--- f.cppm
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export module f;
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export import c;
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//--- g.cpp
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// expected-no-diagnostics
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import f;
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void g() {
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for (int x : {0}) {
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}
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}
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template <typename>
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void gg() {
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for (int x : {0}) {
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}
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}
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void ggg() {
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gg<int>();
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}
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