[all-commits] [llvm/llvm-project] b0e35e: [Offloading] Add support for compressed OffloadBin...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b0e35e5f4132e4c70517ced0ae13e762cd2ab05c
      https://github.com/llvm/llvm-project/commit/b0e35e5f4132e4c70517ced0ae13e762cd2ab05c
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2026-09-30 (Wed, 30 Sep 2026)

  Changed paths:
    M llvm/docs/CommandGuide/llvm-offload-binary.md
    M llvm/docs/ReleaseNotes.md
    M llvm/include/llvm/Object/OffloadBinary.h
    M llvm/include/llvm/ObjectYAML/OffloadYAML.h
    M llvm/lib/Object/OffloadBinary.cpp
    M llvm/lib/ObjectYAML/OffloadEmitter.cpp
    M llvm/lib/ObjectYAML/OffloadYAML.cpp
    A llvm/test/ObjectYAML/Offload/compressed-zlib.yaml
    A llvm/test/ObjectYAML/Offload/compressed.yaml
    A llvm/test/ObjectYAML/Offload/malformed-compressed-offset.yaml
    M llvm/test/ObjectYAML/Offload/malformed-version.yaml
    A llvm/test/tools/llvm-objdump/Offloading/compressed.test
    A llvm/test/tools/llvm-offload-binary/compress.test
    M llvm/tools/llvm-objdump/OffloadDump.cpp
    M llvm/tools/llvm-objdump/OffloadDump.h
    M llvm/tools/llvm-objdump/llvm-objdump.cpp
    M llvm/tools/llvm-offload-binary/llvm-offload-binary.cpp
    M llvm/tools/obj2yaml/offload2yaml.cpp
    M llvm/unittests/Object/OffloadingTest.cpp

  Log Message:
  -----------
  [Offloading] Add support for compressed OffloadBinary types (#222774)

Summary:
Offload binaries are used to store many heterogenous architectures into
a singel offloading blob. These lists can get very large so this PR adds
the option to compress them with the LLVM provided compression
libraries.

The implementation is quite simple, we simply compress all the buffers
after the header into a single compressed blob, then re-construct the
header. Extracting is the reverse.

The biggest change is that the offload binary now **owns** the memory,
whereas before we simply took a reference to it. This is necessary
because the decompression must create new memory compared to what the
user provided. This adds an extra copy internally, but it also
simplifies the V2 additions.

This does not wire up any clang/HIP support, just providing the
functionality.

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