[DTLTO][ELF][COFF] Add archive support for DTLTO. by kbelochapka · Pull Request #157043 · llvm/llvm-project (original) (raw)

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@kbelochapka

@kbelochapka

This patch implements support for handling archive members in DTLTO.

Unlike ThinLTO, where archive members are passed as in-memory buffers, DTLTO requires archive members to be materialized as individual files on the filesystem. This is necessary because DTLTO invokes clang externally, which expects file-based inputs. To support this, this implementation identifies archive members among the input files, saves them to the filesystem, and updates their module_id to match their file paths.

@kbelochapka

tru

@kbelochapka

…eview comments from Tobias.

@kbelochapka

@kbelochapka kbelochapka changed the title[DTLTO][ELF][COFF][MachO] Add archive support for DTLTO. [DTLTO][ELF][COFF] Add archive support for DTLTO.

Sep 9, 2025

@kbelochapka

…support from lld/ELF/InputFiles.cpp.

@kbelochapka

…rt from lld/MachO/InputFiles.cpp for now.

tru

@kbelochapka

@kbelochapka

@kbelochapka

@kbelochapka

teresajohnson

@kbelochapka

…f(Lto==NULL)' check from TempFilesRemover destructor.

@kbelochapka

…THIN_ARCHIVE_MAGIC' with object::ThinArchiveMagic.

cachemeifyoucan

teresajohnson

@kbelochapka

…Input() a member of lto::LTO class.

@kbelochapka

…ory overhead for non-DTLTO mode from lto::LTO::add().

@kbelochapka

@kbelochapka

…d lto::DTLTO class derived from lto::LTO class.

@kbelochapka

@kbelochapka

teresajohnson

@kbelochapka

…tlto flag from lto::LTO class.

teresajohnson

teresajohnson

teresajohnson

@kbelochapka

… functions and data members private for lto::DTLTO class.