On Wed, May 26, 2021 at 8:55 AM lexa kop via Gcc-bugs <gcc-bugs@gcc.gnu.org> wrote: > > [ver]i try compile it on gcc 11 and gcc 12 > [new features]i use gcc modules features(module;export module, import, > import export) > [command]g++ *.cpp -std=c++20 -fmodules-ts > /usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include/g++-v12/bits/basic_string.h: > In member function ‘std::__cxx11::basic_string<_CharT, _Traits, > _Alloc>::pointer std::__cxx11::basic_string<_CharT, _Traits, > _Alloc>::_M_create(std::__cxx11::basic_string<_CharT, _Traits, > _Alloc>::size_type&, std::__cxx11::basic_string<_CharT, _Traits, > _Alloc>::size_type) [with _CharT = char; _Traits = > std::char_traits<char>; _Alloc = std::allocator<char>]’: > /usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include/g++-v12/bits/basic_string.h:233:7: > error: unrecognizable insn: > 233 | _M_create(size_type&, size_type); > | ^~~~~~~~~ > (insn 20 19 21 5 (set (reg:DI 98) > (reg/v 87 [ __old_capacity ])) > "/usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include/g++-v12/bits/basic_string.tcc":143:7 > -1 > (nil)) > during RTL pass: vregs > /usr/lib/gcc/x86_64-pc-linux-gnu/12.0.0/include/g++-v12/bits/basic_string.h:233:7: > internal compiler error: in extract_insn, at recog.c:2770
The error message does not look related at all to modules. Can you file a bug to https://gcc.gnu.org/bugzilla/ after reading https://gcc.gnu.org/bugs/? So on the internal compiler error message here, it looks like a mode is missing for reg 87; I don't know why off hand either. Thanks, Andrew
