en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/clang/test/CodeGenCXX/Inputs/cxx20-module-impl-1a.cpp#ae4dce86 [clang][ABI] New C++20 module mangling schemeImplement a demangleable strong ownership symbol mangling. * The original module symbol mangling scheme turned out to beundemangleable. * The hoped-for C++17 compatibility of weak ownership turns out to befragile* C++20 now has better ways of controlling C++17 compatibilityThe issue is captured on the ABI list at: https://github.com/itanium-cxx-abi/cxx-abi/issues/134GCC implements this new mangling.The old mangling is unceremoniously dropped. No backwardscompatibility, no deprectated old-mangling flag. It was alwayslabelled experimental. (Old and new manglings cannot be confused.)Reviewed By: dblaikieDifferential Revision: https://reviews.llvm.org/D122256 List of files: /llvm-project-15.0.7/clang/test/CodeGenCXX/Inputs/cxx20-module-impl-1a.cpp Tue, 18 Jan 2022 15:14:08 +0000 Nathan Sidwell <nathan@acm.org> http://172.16.0.5:8080/history/llvm-project-15.0.7/clang/test/CodeGenCXX/Inputs/cxx20-module-impl-1a.cpp#21e16ab6 [clang][ABI] New C++20 module mangling schemeThe existing module symbol mangling scheme turns out to beundemangleable. It is also desirable to switch to thestrong-ownership model as the hoped-for C++17 compatibility turns outto be fragile, and we also now have a better way of controlling that.The issue is captured on the ABI list at: https://github.com/itanium-cxx-abi/cxx-abi/issues/134A document describing the issues and new mangling is at: https://drive.google.com/file/d/1qQjqptzOFT_lfXH8L6-iD9nCRi34wjft/viewThis patch is the code-generation part. I have a demangler too, butthat patch is based on some to-be-landed refactoring of the demangler.The old mangling is unceremoniously dropped. No backwardscompatibility, no deprectated old-mangling flag. It was alwayslabelled experimental. (Old and new manglings cannot be confused.)Reviewed By: ChuanqiXuDifferential Revision: https://reviews.llvm.org/D118352 List of files: /llvm-project-15.0.7/clang/test/CodeGenCXX/Inputs/cxx20-module-impl-1a.cpp Tue, 18 Jan 2022 15:14:08 +0000 Nathan Sidwell <nathan@acm.org>