[all-commits] [llvm/llvm-project] e6ff55: [clang-extdef-mapping] Directly process .ast files

[Tobias Hieta via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e6ff553979e850eeb7f0bbe77deab1c88fc764b3
      https://github.com/llvm/llvm-project/commit/e6ff553979e850eeb7f0bbe77deab1c88fc764b3
  Author: Tobias Hieta <tobias at hieta.se>
  Date:   2022-07-05 (Tue, 05 Jul 2022)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/test/Analysis/func-mapping-test.cpp
    M clang/tools/clang-extdef-mapping/ClangExtDefMapGen.cpp

  Log Message:
  -----------
  [clang-extdef-mapping] Directly process .ast files

When doing CTU analysis setup you pre-compile .cpp to .ast and then
you run clang-extdef-mapping on the .cpp file as well. This is a
pretty slow process since we have to recompile the file each time.

With this patch you can now run clang-extdef-mapping directly on
the .ast file. That saves a lot of time.

I tried this on llvm/lib/AsmParser/Parser.cpp and running
extdef-mapping on the .cpp file took 5.4s on my machine.

While running it on the .ast file it took 2s.

This can save a lot of time for the setup phase of CTU analysis.

Reviewed By: martong

Differential Revision: https://reviews.llvm.org/D128704