[all-commits] [llvm/llvm-project] 7ec342: [C++20] [Modules] [Reduced BMI] Write Special Decl...

[Chuanqi Xu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7ec342ba16ca97206aa2ddd5b7ec0da063042e03
      https://github.com/llvm/llvm-project/commit/7ec342ba16ca97206aa2ddd5b7ec0da063042e03
  Author: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
  Date:   2024-04-18 (Thu, 18 Apr 2024)

  Changed paths:
    M clang/include/clang/Serialization/ASTWriter.h
    M clang/lib/Serialization/ASTWriter.cpp
    A clang/test/Modules/reduced-bmi-empty-module-purview-std.cppm

  Log Message:
  -----------
  [C++20] [Modules] [Reduced BMI] Write Special Decl Lazily

ASTWrite would write some special records for the consumer of the AST
can get the information easily. This is fine. But currently all the
special records are written eagerly, which is conflicting with reduced
BMI.

In reduced BMI, we hope to write things as less as possible. It is not a
goal for reduced BMI to retain all the informations. So in this patch we
won't record the special declarations eagerly before we starting write.
But only writing the sepcial records after we writes decls and types,
then only the reached declarations will be collected.



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