[all-commits] [llvm/llvm-project] 1a4355: [llvm] annotate interfaces in llvm/LTO for DLL exp...

[Andrew Rogers via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1a435522c0e1a5ec64d3580839350cc81ac4c0ac
      https://github.com/llvm/llvm-project/commit/1a435522c0e1a5ec64d3580839350cc81ac4c0ac
  Author: Andrew Rogers <andrurogerz at gmail.com>
  Date:   2025-06-03 (Tue, 03 Jun 2025)

  Changed paths:
    M llvm/include/llvm/InterfaceStub/ELFObjHandler.h
    M llvm/include/llvm/InterfaceStub/IFSHandler.h
    M llvm/include/llvm/InterfaceStub/IFSStub.h
    M llvm/include/llvm/LTO/Config.h
    M llvm/include/llvm/LTO/LTO.h
    M llvm/include/llvm/LTO/LTOBackend.h
    M llvm/include/llvm/LTO/legacy/LTOCodeGenerator.h
    M llvm/include/llvm/LTO/legacy/LTOModule.h
    M llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h
    M llvm/include/llvm/LineEditor/LineEditor.h
    M llvm/include/llvm/Linker/IRMover.h
    M llvm/include/llvm/Linker/Linker.h
    M llvm/lib/LTO/LTO.cpp

  Log Message:
  -----------
  [llvm] annotate interfaces in llvm/LTO for DLL export (#142499)

## Purpose

This patch is one in a series of code-mods that annotate LLVM’s public
interface for export. This patch annotates the `llvm/LTO` library. These
annotations currently have no meaningful impact on the LLVM build;
however, they are a prerequisite to support an LLVM Windows DLL (shared
library) build.

## Background

This effort is tracked in #109483. Additional context is provided in
[this
discourse](https://discourse.llvm.org/t/psa-annotating-llvm-public-interface/85307),
and documentation for `LLVM_ABI` and related annotations is found in the
LLVM repo
[here](https://github.com/llvm/llvm-project/blob/main/llvm/docs/InterfaceExportAnnotations.rst).

The bulk of these changes were generated automatically using the
[Interface Definition Scanner (IDS)](https://github.com/compnerd/ids)
tool, followed formatting with `git clang-format`.

The following manual adjustments were also applied after running IDS on
Linux:
- Add `LLVM_ABI` to a small number of symbols that require export but
are not declared in headers

## Validation

Local builds and tests to validate cross-platform compatibility. This
included llvm, clang, and lldb on the following configurations:

- Windows with MSVC
- Windows with Clang
- Linux with GCC
- Linux with Clang
- Darwin with Clang



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