[all-commits] [llvm/llvm-project] 96122b: [C++20] [Modules] Introduce ForceCheckCXX20Modules...

[Chuanqi Xu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 96122b5b717c2b1a291d7298ac50b1daf02bd97c
      https://github.com/llvm/llvm-project/commit/96122b5b717c2b1a291d7298ac50b1daf02bd97c
  Author: Chuanqi Xu <yedeng.yd at linux.alibaba.com>
  Date:   2023-09-08 (Fri, 08 Sep 2023)

  Changed paths:
    M clang/include/clang/Driver/Options.td
    M clang/include/clang/Lex/HeaderSearchOptions.h
    M clang/lib/Frontend/ASTUnit.cpp
    M clang/lib/Serialization/ASTReader.cpp
    A clang/test/Modules/cxx20-force-check-input.cppm

  Log Message:
  -----------
  [C++20] [Modules] Introduce ForceCheckCXX20ModulesInputFiles options for
C++20 modules

Previously, we banned the check for input files from C++20 modules since
we thought the BMI from C++20 modules should be a standalone artifact.

However, during the recent experiment with clangd for modules, I find
it is necessary to tell whether or not a BMI is out-of-date by checking the
input files especially for language servers.

So this patch brings a header search option
ForceCheckCXX20ModulesInputFiles to allow the tools (concretly, clangd)
to check the input files from BMI.