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.
47 lines
1000 B
C++
47 lines
1000 B
C++
// Tests that the compiler won't crash due to the consteval constructor.
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//
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// REQUIRES: x86-registered-target
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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 -triple=x86_64-linux-gnu -std=c++20 -emit-module-interface %t/m.cppm -o %t/m.pcm
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// RUN: %clang_cc1 -triple=x86_64-linux-gnu -std=c++20 %t/m.pcm -S -emit-llvm -o - | FileCheck %t/m.cppm
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//--- m.cppm
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module;
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#include "fail.h"
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export module mymodule;
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// CHECK: @.str = {{.*}}"{}\00"
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// CHECK: store{{.*}}ptr @.str
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//--- fail.h
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namespace std {
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template<class _CharT>
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class basic_string_view {
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public:
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constexpr basic_string_view(const _CharT* __s)
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: __data_(__s) {}
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private:
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const _CharT* __data_;
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};
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template <class _CharT>
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struct basic_format_string {
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template <class _Tp>
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consteval basic_format_string(const _Tp& __str) : __str_{__str} {
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}
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private:
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basic_string_view<_CharT> __str_;
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};
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}
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auto this_fails() -> void {
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std::basic_format_string<char> __fmt("{}");
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}
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