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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
dc4e85bd79 [C++20] [Modules] Remove hardcoded path to imported module in BMIs 
Close https://github.com/llvm/llvm-project/issues/62707

As we discussed before, we'll forbid the use of implicit generated path
for C++20 modules. And as I mentioned in
https://github.com/llvm/llvm-project/issues/62707, we've emitted a
warning for clang17 and we'll make it a hard error in clang18. And the
patch addresses the decision.
 2024-01-12 13:47:59 +08:00
Chuanqi Xu
62b5e55512 Revert "[Serialization] Don't try to complete the redeclaration chain in" 
Close https://github.com/llvm/llvm-project/issues/62705

This reverts commit cf47e9fe86aa65b74b0476a5ad4d036dd7463bfb. This
introduces a breaking change in
https://github.com/llvm/llvm-project/issues/62705. Revert this one to
fix it quickly.
 2023-05-15 11:19:17 +08:00