[all-commits] [llvm/llvm-project] e1cc29: [clang] Introduce copy-on-write `CompilerInvocatio...

[Jan Svoboda via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e1cc299ec885d0b1607f162322fe23b772866acf
      https://github.com/llvm/llvm-project/commit/e1cc299ec885d0b1607f162322fe23b772866acf
  Author: Jan Svoboda <jan_svoboda at apple.com>
  Date:   2023-09-07 (Thu, 07 Sep 2023)

  Changed paths:
    M clang/include/clang/Basic/CodeGenOptions.h
    M clang/include/clang/Basic/DiagnosticOptions.h
    M clang/include/clang/Basic/LangOptions.h
    M clang/include/clang/Frontend/CompilerInvocation.h
    M clang/lib/Frontend/CompilerInvocation.cpp
    M clang/unittests/Frontend/CompilerInvocationTest.cpp

  Log Message:
  -----------
  [clang] Introduce copy-on-write `CompilerInvocation` (#65412)

This PR introduces new copy-on-write `CompilerInvocation` class
(`CowCompilerInvocation`), which will be used by the dependency scanner
to reduce the number of copies performed when generating command lines
for discovered modules.