[all-commits] [llvm/llvm-project] 739b41: Add a warning, flags and pragmas to limit the numb...

[Hans via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 739b410f1ff51d507830774320c2db3a80d8610d
      https://github.com/llvm/llvm-project/commit/739b410f1ff51d507830774320c2db3a80d8610d
  Author: Hans Wennborg <hans at chromium.org>
  Date:   2020-01-27 (Mon, 27 Jan 2020)

  Changed paths:
    M clang/include/clang/Basic/DiagnosticGroups.td
    M clang/include/clang/Basic/DiagnosticParseKinds.td
    M clang/include/clang/Basic/LangOptions.def
    M clang/include/clang/Driver/Options.td
    M clang/include/clang/Lex/Preprocessor.h
    M clang/include/clang/Parse/Parser.h
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Frontend/CompilerInvocation.cpp
    M clang/lib/Lex/Preprocessor.cpp
    M clang/lib/Parse/ParsePragma.cpp
    M clang/lib/Parse/Parser.cpp
    M clang/test/Driver/autocomplete.c
    A clang/test/Parser/max-tokens.cpp

  Log Message:
  -----------
  Add a warning, flags and pragmas to limit the number of pre-processor tokens in a translation unit

See
https://docs.google.com/document/d/1xMkTZMKx9llnMPgso0jrx3ankI4cv60xeZ0y4ksf4wc/preview
for background discussion.

This adds a warning, flags and pragmas to limit the number of
pre-processor tokens either at a certain point in a translation unit, or
overall.

The idea is that this would allow projects to limit the size of certain
widely included headers, or for translation units overall, as a way to
insert backstops for header bloat and prevent compile-time regressions.

Differential revision: https://reviews.llvm.org/D72703