bd1976bris bbbbc093fe [DTLTO][LLD][COFF] Add support for Integrated Distributed ThinLTO (#148594) ...

This patch introduces support for Integrated Distributed ThinLTO (DTLTO)
in COFF LLD.

DTLTO enables the distribution of ThinLTO backend compilations via
external distribution systems, such as Incredibuild, during the
traditional link step: https://llvm.org/docs/DTLTO.html.

Note: Bitcode members of non-thin archives are not currently supported.
This will be addressed in a future change. This patch is sufficient to
allow for self-hosting an LLVM build with DTLTO if thin archives are
used.

Testing:
- LLD `lit` test coverage has been added, using a mock distributor to
avoid requiring Clang.
- Cross-project `lit` tests cover integration with Clang.

For the design discussion of the DTLTO feature, see:
https://github.com/llvm/llvm-project/pull/126654

2025-07-20 14:47:00 +01:00

10 KiB

Raw Blame History

View Raw