2 Commits

Author SHA1 Message Date
Chuanqi Xu
da00c60dae
[C++20] [Modules] Introduce reduced BMI (#75894)
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.
2024-03-08 10:12:51 +08:00
Chuanqi Xu
354a597b9f [C++20] [Modules] Don't complain about duplicated default template argument across modules
See https://github.com/cplusplus/draft/pull/5204 for a detailed
 background.

 Simply, the test redundant-template-default-arg.cpp attached to this
 patch should be accepted instead of being complained about the
 redefinition.

 Reviewed By: urnathan, rsmith, ChuanqiXu

 Differential Revision: https://reviews.llvm.org/D118034
2022-07-08 11:10:51 +08:00