radlink: perf + feature series — ICF/ICFSTATIC, GCTYPES, header-units, link-time + memory (rebased on dev, taken commits dropped) - #842

Draft

honkstar1 wants to merge 87 commits into

EpicGames:devfrom

honkstar1:radlink-pr-series

Commits on Jun 30, 2026

const/volatile/unsigned/signed type operators
ryanfleury
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68906f1
eval2: first pass at type_key -> string path
ryanfleury
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9013136

Commits on Jul 6, 2026

checkpoint on text patches
ryanfleury
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6b5bf1d

Commits on Jul 13, 2026

debug report live stats after /OPT:REF pass
NikitaSmith057
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ea95592
implement /OPT:ICF
NikitaSmith057
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d0d8b59
duplicate identical search aliases are not an error case
NikitaSmith057
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6a971a1
check that __imp_* archive symbols are import members before applying
NikitaSmith057
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5e1c193
enable binary for stdout and stderr to bypass CRLF mangling issues in
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951cd59
debug log unresolved symbols specified in .llvm_addrsig
NikitaSmith057
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35f7f9d
fix DBI SC image-section range mapping
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82907ec
LLVM BC magic sniffer
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8662d1c
assign COMDAT symlinks after weak symbol replacement
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5f957fe
handle BOMs in linker response files
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638ff85
add DEF, GUARD, and SECTION config support
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e89fc48
refactor radlink section gathering
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188b26e
split external-symbol handling from section-definition fallbacks
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e0cfc2f
simplify COMDAT leader symbol patching
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b5532f5
remove empty sections if it does not have any section contributions too
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9cb7fed
fix import data directory bounds
NikitaSmith057
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cc21ed1
refine COMDAT symlink handling
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ef59afe
update CHANGELOG.md
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933bc7c

Commits on Jul 14, 2026

Commits on Jul 17, 2026

release file maps before exit in parallel before exit
NikitaSmith057
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a06b6b0
gate for page pre-faulting on windows
NikitaSmith057
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e28ee0a
WIP light COFF symbol table parse
NikitaSmith057
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43dace5

Commits on Jul 20, 2026

WIP assigned symbols
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f6a7253
WIP cache COFF symbol interp
NikitaSmith057
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624a931
merge debug info and llvm_addrsig finders into lnk_obj_initer to reduce
NikitaSmith057
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5490fac
radix sort PSI address map
NikitaSmith057
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6bf29b2
rename RAD_TypeHashAlg; extend /RAD_DEBUG_TYPE_HASH with XXHASH option
NikitaSmith057
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1f5f30c
use cycle tracking only on weak and undefined symbols
NikitaSmith057
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7d0d578
WIP PDB Writer Thread
NikitaSmith057
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735b554
refactor PDB background file output
NikitaSmith057
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fbf6bcf
make const data eligible for ICF
NikitaSmith057
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a8f78cb
radix sort pass over section contribs
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fe05622
parallel radix sort and coalesce adjacent section contribs
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db25694
search small libraries on the main thread to reduce wait times in barriers
NikitaSmith057
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81bc345

Commits on Jul 21, 2026

radlink: enable C11 atomics so BLAKE3 skips the lock'd CPU-feature load

honkstar1
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946e4e6
radlink: release copy-on-write input views in parallel before exit

honkstar1
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4ed63aa
radlink: release the ~1GB image buffer early so reclaim overlaps the run

honkstar1
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4650217
radlink: /OPT:GCTYPES -- garbage-collect unreferenced CodeView types before PDB emit (opt-in, default off)

honkstar1
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99ed2f5
radlink: frontier worklist for type-GC transitive closure (perf)

honkstar1
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191869b
radlink: skip the GC mark atomic on the already-reachable fast path

honkstar1
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ed2e4df
radlink: header-unit IFC debug-record resolution

honkstar1
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d45ad7e
linker: parallelize apply_ifc nonblob_complete set merge + ifc parse
honkstar1
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2a4f9a3
linker: parallelize the serial setup loops in lnk_make_code_view_input

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2ab3521
radlink perf: decommit idle tctx scratch pages before PDB build

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a4da5be
linker: free leaf bucket_arr probe tables before the merge-types commit peak

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7066161
radlink: env-gated RADLINK_PHASE_LOG raw per-phase micros file (diagnostic, byte-neutral)

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fa83336
linker: /RAD_SHARED_THREAD_POOL -- cross-process shared thread pool (governor + fair-share cohorts)

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e8489c0
radlink: sort image relocs by apply_off for monotone-forward patch writes

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36d41e2
radlink: non-temporal stores for write-once image fill

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4751260
radlink: false-sharing pads on per-worker [worker_count] arrays

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7adc50f
radlink: symbol trie inline-hash fast-reject

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79c0d74
radlink: reap merge-types bucket arena on a background thread

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c62b42b
radlink: patch debug-section relocs on private copies (keep CoW input pages clean)

honkstar1
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6e0a8ce
radlink: /PDBSTRIPPED strips proc itype in the destination buffer, not the source $$S

honkstar1
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7455386
radlink: skip the input-view unmap pass when the process exits right after the link

honkstar1
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10f204a
linker: size leaf dedup tables from a deterministic unique-count estimate

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7014fe9
linker: shard GSI/PSI symbol inserts by bucket range

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ca73de9
codeview: replace per-TI linked-list type-index offsets with static descriptor tables

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638c1d4
linker: parallelize image align-byte fill (first-touch) across the pool

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88d075c
arena: 2MB commit quantum for the link's high-churn arenas

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93128cf
linker: sample the unique-leaf estimator at every 8th leaf position

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84ad042
linker: size-weighted obj distribution for the PDB barrier passes

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48c7c64
linker: schedule-independent symrec order for same-name global symbols

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75b2f67
linker: /OPT:REF walk: memoize reloc-symbol resolution, drop per-reloc tree HashMaps, skip name decodes

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7993468
linker: /OPT:REF: parallelize unreachable-section removal

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18af789
linker: packed-discriminator pre-filter for archive symbol-dir bsearch

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39ff004
linker: balance GSI deduper inserts and parallelize bucket compaction

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bc240fd
linker: release scratch free-list blocks off the main thread

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bd7300c
linker: warn visibly on unknown /RAD_* command-line switches

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8c851db
base: fail cleanly on arena reserve/commit failure instead of AVing

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5087c22
linker: opt-in one-line [radlink summary] (v=3) for production triage

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7ae549e
linker: batch-prefetch mapped debug input, fanned out over the pool -- serial ~0.9 s stall to parallel burst

honkstar1
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5439a72
linker: stop prefaulting every committed page -- commit_memory RIO probe-and-lock removal

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67d0eca
linker: map input file views read-only -- commit charge per dirtied page, not per view

honkstar1
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91cb4e4
linker: fix garbage file/line refs in unresolved-symbol reports -- the lookup ran reloc apply_off against an obj-wide lines accel built from UNRELOCATED .debug$S (every per-function COMDAT fragment…

honkstar1
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3770eeb
linker: /OPT:ICF -- folded functions keep bindable debug info (Lines at the leader RVA; full record tree for different-source folds with locals)

honkstar1
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b4b63c5
linker: /OPT:ICF perf -- dirty-skip refinement round keys, /RAD_ICF_HASH_ALG:XXH3, FILECHKSMS memo

honkstar1
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8c54530
build: PGO training also links with /OPT:REF /OPT:ICF

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2c76dd9
linker: implement by-name-no-prefix and undecorate import members

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1e93a4b
thread_pool: fair-share floor for barrier-pass cohorts

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3c25d94
linker: patch symbol tables in private copies -- keep CoW input pages clean

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0aa9675
linker: fuse leaf TI-fixup into unbucket -- materialize unique leaves into private memory

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08bbf0e
linker: escalate folded-debug-info to the full tree on function-scoped statics too

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402fd12