[all-commits] [llvm/llvm-project] a5aa0c: Introduce -funique-source-file-names flag.

[Peter Collingbourne via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a5aa0c46c3274eaf25dde4d792a1abd6191cccf9
      https://github.com/llvm/llvm-project/commit/a5aa0c46c3274eaf25dde4d792a1abd6191cccf9
  Author: Peter Collingbourne <pcc at google.com>
  Date:   2025-04-15 (Tue, 15 Apr 2025)

  Changed paths:
    M clang/docs/ControlFlowIntegrity.rst
    M clang/docs/UsersManual.rst
    M clang/include/clang/Basic/CodeGenOptions.def
    M clang/include/clang/Driver/Options.td
    M clang/lib/CodeGen/CodeGenModule.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    A clang/test/CodeGen/unique-source-file-names.c
    A clang/test/Driver/unique-source-file-names.c
    M llvm/lib/Transforms/Utils/ModuleUtils.cpp
    A llvm/test/Transforms/ThinLTOBitcodeWriter/unique-source-file-names.ll

  Log Message:
  -----------
  Introduce -funique-source-file-names flag.

The purpose of this flag is to allow the compiler to assume that each
object file passed to the linker has been compiled using a unique
source file name. This is useful for reducing link times when doing
ThinLTO in combination with whole-program devirtualization or CFI,
as it allows modules without exported symbols to be built with ThinLTO.

Reviewers: vitalybuka, teresajohnson

Reviewed By: teresajohnson

Pull Request: https://github.com/llvm/llvm-project/pull/135728



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