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c6f70374bc436249213a89f8ab3e2032d331a118
Nim/compiler
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araq c6f70374bc IC: make timed arm the profiler, and price the C compiler 
`timed` recorded into `profNanos` but never called `armProf()`, so a
process whose only instrumentation is a `timed` never registered the exit
dump and reported nothing at all. The `merge`, `emit` and `link` stages
have been silently absent from every profile in this branch — including
the one I used to claim the backend was fully accounted for.

With them present, Atlas cold at batch size 16, parallel (9.66s elapsed):

    frontend   181 proc   10.60 s summed process wall
    lower       14 proc    4.49 s
    cg          14 proc    4.50 s
    merge        1 proc    0.20 s
    emit        14 proc    0.42 s
    link         1 proc    1.65 s   <- the entire C compile + link

That settles the C compiler as a target: its 12.2s of CPU is 1.65s of
wall, because `callCCompiler` fans out across cores, and the excess over
a whole-program build is ~0.4s of it. `bnode.nim` records where the
excess is — 3.8MB of the 5.4MB is per-TU prototypes and typedefs, which
is intrinsic to emitting 204 translation units instead of 139 — and why
the obvious sub-target is not one either: 53 of the 204 object files
define nothing, and compiling all 53 costs 0.23s of user time.

Fewer, larger TUs is the only real fix, and it trades directly against
what IC is for: a sandwich edit rebuilds exactly one `.c` and one `.o`.

Behind `-d:icBNodeProf`. ic 42/42.
2026-08-31 19:59:09 +02:00
..
ic
IC: the link stage no longer loads the module graph
2026-08-28 23:13:16 +02:00
plugins
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
aliasanalysis.nim
fixes #26123; Update PathKinds1 to include nkCast (#26126)
2026-08-21 21:57:51 +08:00
aliases.nim
fix #26112: update variable kinds in isPartOf to include skResult (#26114)
2026-08-17 23:37:46 +02:00
ast2nif.nim
IC: build a module's hidden interface on demand, not on every load
2026-08-31 19:38:07 +02:00
ast.nim
IC: add -d:icSymCount, and use it to settle the full-compiler comparison
2026-08-30 16:16:08 +02:00
astalgo.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
astdef.nim
IC: grind the Cursor vocabulary against the PNode loader, and fix what it found
2026-08-30 08:07:38 +02:00
astmsgs.nim
fixes #23494; Wrong type in object construction error message (#23504)
2024-04-16 12:46:59 +02:00
astyaml.nim
astyaml: formatting fixes (#25897)
2026-06-11 14:10:42 +02:00
bitsets.nim
NIR: Nim intermediate representation (#22777)
2023-10-11 17:44:14 +02:00
bnode.nim
IC: make timed arm the profiler, and price the C compiler
2026-08-31 19:59:09 +02:00
bodynav.nim
IC: make the location primitives representation-agnostic
2026-08-30 14:21:52 +02:00
btrees.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
cbuilderbase.nim
fixes nightlies failures (#24456)
2024-11-19 08:51:54 +01:00
cbuilderdecls.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
cbuilderexprs.nim
cbuilder: use constants for type names, some cleanups (#24438)
2024-11-18 17:34:37 +01:00
cbuilderstmts.nim
cbuilder: use constants for type names, some cleanups (#24438)
2024-11-18 17:34:37 +01:00
ccgcalls.nim
Merge branch 'devel' into araq-ic-fixes2
2026-08-30 20:38:00 +02:00
ccgexprs.nim
IC: undo gratuitous rewrites the bulk migration made
2026-08-30 16:07:20 +02:00
ccgliterals.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
ccgmerge_unused.nim
removed unused sections in codegen (#20976)
2022-11-30 21:51:13 +01:00
ccgreset.nim
cgen: no [] on a PNode outside tree construction
2026-08-29 06:57:55 +02:00
ccgstmts.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
ccgthreadvars.nim
IC refactor (#25927)
2026-06-25 23:20:34 +02:00
ccgtrav.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
ccgtypes.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
ccgutils.nim
IC: take the seam into trees and ccgutils
2026-08-30 10:23:43 +02:00
cgen.nim
IC: two assumptions that only held while a cg process wrote one TU
2026-08-31 15:38:15 +02:00
cgendata.nim
IC: route a cg definition by who owns it, not by who asked
2026-08-31 10:18:09 +02:00
cgmeth.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
closureiters.nim
fix: exception leak in closure iterator typed except branches (#23615) (#26034)
2026-07-24 14:06:27 +02:00
cmdlinehelper.nim
use IC for nimsuggest (#25915)
2026-06-24 21:58:51 +02:00
cnif.nim
IC: more bugfixes (#26141)
2026-08-27 19:35:11 +02:00
commands.nim
IC: let one backend process handle a batch of modules
2026-08-31 10:53:14 +02:00
compiler.nimble
Create compiler and nimsuggest packages (#22118)
2023-06-18 16:06:14 +02:00
concepts.nim
fix 26147; new-style concepts: broken generic (Case B) (#26151)
2026-08-28 22:31:58 +02:00
condsyms.nim
fixes #24706; Warn on implicit range downsizing (#25451)
2026-02-01 17:06:33 +01:00
debuginfo.nim
happy new year
2017-01-07 22:35:09 +01:00
debugutils.nim
Extend and document compiler debugging utilities (#19841)
2022-06-10 20:40:08 +02:00
depends.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
deps.nim
IC: build a module's hidden interface on demand, not on every load
2026-08-31 19:38:07 +02:00
dfa.nim
fixes #26123; Update PathKinds1 to include nkCast (#26126)
2026-08-21 21:57:51 +08:00
docgen2.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
docgen.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
enumtostr.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
errorhandling.nim
IC: progress and refactorings (#22961)
2023-11-20 21:12:13 +01:00
evalffi.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
evaltempl.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
expanddefaults.nim
remove fauxMatch for tyFromExpr, remove tyProxy and tyUnknown aliases (#24018)
2024-08-28 20:46:36 +02:00
extccomp.nim
Create Mac app bundle for GUI apps on macOS when --app:gui is used (#25042)
2025-07-14 23:14:06 +02:00
filter_tmpl.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
filters.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
gorgeimpl.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
guards.nim
fixes #22791; ProveField warning with nested case object (#25774)
2026-05-27 23:29:27 +02:00
hlo.nim
Fixes #25304 proper test for hlo recursion limit (#25305)
2025-11-21 21:26:43 +01:00
icconfig.nim
IC: more bugfixes (#26141)
2026-08-27 19:35:11 +02:00
icmodnames.nim
IC related bugfixes (#25946)
2026-07-03 15:52:41 +02:00
icnifcore.nim
IC: final tweaks (#25958)
2026-07-04 10:13:39 +02:00
icprof.nim
IC: make timed arm the profiler, and price the C compiler
2026-08-31 19:59:09 +02:00
idents.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
idetools.nim
nim-track: make include files work (#25977)
2026-07-09 22:13:39 +02:00
importer.nim
fix: implicit imports drop std/ prefix (#25780)
2026-05-08 06:50:13 +02:00
index.nim
walkDirRecFilter, update doc CI filter, compiler/index.nim for docs + various other fixes (#14501)
2020-06-01 19:21:41 +02:00
injectdestructors.nim
fixes #26143; Possible memory error (#26154)
2026-08-28 22:26:18 +02:00
inliner.nim
IC progress (#25283)
2025-11-25 12:49:23 +01:00
installer.ini
fixes nightlies due to UB errors; increase maxCPU hard limits (#25219)
2025-10-13 13:47:06 +02:00
int128.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
isolation_check.nim
docs: fix typos (#24573)
2024-12-27 19:42:18 +01:00
itemids.nim
IC: progress (#25879)
2026-06-14 22:35:06 +02:00
jsgen.nim
js: fix var openArray write-through for toOpenArray (#26086)
2026-08-26 18:01:06 +02:00
jstypes.nim
fixes #25043: js tyUserTypeClass internal error (#25044)
2025-07-14 23:15:44 +02:00
lambdalifting.nim
IC: three closure/environment fixes found by differential grinding
2026-08-26 12:12:51 +02:00
layeredtable.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
layouter.nim
fix #20078: nimpretty --indent applies to keepIndents regions (#25985)
2026-08-03 12:15:44 +02:00
lexer.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
liftdestructors.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
liftlocals.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
lineinfos.nim
fixes-25655; defining >= operator generates compile error (#25787)
2026-06-08 09:00:00 +02:00
linter.nim
fixes #19831; add --styleCheck:warning (#25456)
2026-01-23 22:50:00 +01:00
llstream.nim
SSO for strings (#25593)
2026-04-02 07:19:43 +02:00
lookups.nim
IC: progress (#25879)
2026-06-14 22:35:06 +02:00
lowerings.nim
IC refactor (#25927)
2026-06-25 23:20:34 +02:00
macrocacheimpl.nim
IC: next steps (#16632)
2021-01-12 09:36:51 +01:00
magicsys.nim
fix compiler crash with uncheckedAssign and range/distinct discrims [backport] (#25585)
2026-03-07 07:39:57 +01:00
main.nim
IC: instrument nim m, and find 1.05s of interface stubs nobody reads
2026-08-31 17:03:05 +02:00
mangleutils.nim
IC: one definition of a backend-minted symbol's disambiguator
2026-08-28 20:03:14 +02:00
modulegraphs.nim
IC: build a module's hidden interface on demand, not on every load
2026-08-31 19:38:07 +02:00
modulepaths.nim
IC: progress (#25420)
2026-01-09 13:10:04 +01:00
modules.nim
IC: progress (#25879)
2026-06-14 22:35:06 +02:00
msgs.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
nifbackend.nim
IC: instrument the backend phases, and tag which process each line is
2026-08-31 16:19:43 +02:00
nifgen.nim
IC related bugfixes (#25946)
2026-07-03 15:52:41 +02:00
nifstreams.nim
IC: own nifstreams here, and move the nimony pin to 1721aab3
2026-08-31 09:30:12 +02:00
nilcheck.nim
fixes-25655; defining >= operator generates compile error (#25787)
2026-06-08 09:00:00 +02:00
nim.cfg
IC: move to BIF / nifcore APIs (#25943)
2026-06-29 18:24:49 +02:00
nim.nim
IC: more bugfixes (#26141)
2026-08-27 19:35:11 +02:00
nimblecmd.nim
fixes yet another strictdefs bug (#23069)
2023-12-15 08:13:25 +01:00
nimconf.nim
use IC for nimsuggest (#25915)
2026-06-24 21:58:51 +02:00
nimeval.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
nimlexbase.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
nimpaths.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
nimsets.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
nodebridge.nim
IC: correct the module docs to the state the seam is actually in, and measure it
2026-08-30 16:25:13 +02:00
nodejs.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
nodekinds.nim
opensym as node kind + fixed experimental switch (#23892)
2024-08-12 15:33:26 +02:00
nversion.nim
warn on set types bigger than max size, default to 0..255 for int literals (#21659)
2023-04-17 20:55:22 +02:00
optimizer.nim
fixes #24806; don't elide wasMoved when syms are used in blocks (#24831)
2025-04-03 12:54:00 +02:00
options.nim
IC: let one backend process handle a batch of modules
2026-08-31 10:53:14 +02:00
packagehandling.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
packages.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
parampatterns.nim
fixes #23949; cannot return lent expression from conditionals like case (#25190)
2025-09-24 06:29:57 +02:00
parser.nim
IC: progress (#25879)
2026-06-14 22:35:06 +02:00
passaux.nim
test removing dollar for objects out of system (#20242)
2022-08-24 09:44:16 +02:00
passes.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +01:00
pathutils.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
patterns.nim
clean up opensym encounters in compiler (#24866)
2025-04-12 08:39:11 +02:00
pipelines.nim
IC: instrument nim m, and find 1.05s of interface stubs nobody reads
2026-08-31 17:03:05 +02:00
pipelineutils.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
platform.nim
adds wasm64 (Memory64) as a first-class target (#25900)
2026-06-11 23:49:50 +02:00
pluginsupport.nim
refactoring: fewer global variables
2018-05-27 19:19:12 +02:00
pragmas.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
prefixmatches.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
procfind.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
pushpoppragmas.nim
fixes push warnings for sempass2 (#23603)
2024-09-03 09:19:52 +02:00
readme.md
clean up the documentation (#22196)
2023-07-02 22:36:05 +02:00
renderer.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
renderverbatim.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
reorder.nim
clean up opensym encounters in compiler (#24866)
2025-04-12 08:39:11 +02:00
rodutils.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
ropes.nim
replaces doAssert false with raiseAssert for unreachable branches, which works better with strictdefs (#22436)
2023-08-10 14:26:40 +02:00
saturate.nim
fix warnings for deprecated low and high (#15291)
2020-09-11 01:04:07 +02:00
scriptconfig.nim
YRC: threadsafe cycle collection for Nim (#25495)
2026-02-10 00:04:11 +01:00
sem.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
semcall.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
semdata.nim
fixes #26025 (#26076)
2026-08-11 22:27:49 +02:00
semexprs.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
semfields.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semfold.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
semgnrc.nim
fixes #26124; internal error: expr: param not init with nested generic procs (#26131)
2026-08-26 08:40:57 +02:00
seminst.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
semmacrosanity.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semmagic.nim
IC: more bugfixes (#26141)
2026-08-27 19:35:11 +02:00
semobjconstr.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
semparallel.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
sempass2.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
semstmts.nim
fixes #26132; =destroy should accept non-parametrized generic (#26142)
2026-08-29 14:40:46 +02:00
semstrictfuncs.nim
alternative, much simpler algorithm for strict func checking (#21066)
2022-12-11 16:58:50 +01:00
semtempl.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
semtypes.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
semtypinst.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
sighashes.nim
fixes #11797; fix C type hashes for imported aliases (#26150)
2026-08-28 22:33:20 +02:00
sigmatch.nim
fix 26147; new-style concepts: broken generic (Case B) (#26151)
2026-08-28 22:31:58 +02:00
sinkparameter_inference.nim
Refactoring #25302; don't store procedure's parameter types to PType.sonsImpl (#25351)
2025-12-26 21:59:38 +01:00
sizealignoffsetimpl.nim
fixes #25885; incompleteStruct ignored without importc (#25898)
2026-06-13 10:17:44 +02:00
sourcemap.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
spawn.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
suggest.nim
use IC for nimsuggest (#25915)
2026-06-24 21:58:51 +02:00
suggestsymdb.nim
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-18 08:44:36 +02:00
syntaxes.nim
fixes addr/hiddenAddr in strictdefs (#23477)
2024-04-10 14:41:16 +02:00
tccgen.nim
replaces doAssert false with raiseAssert for unreachable branches, which works better with strictdefs (#22436)
2023-08-10 14:26:40 +02:00
transf.nim
IC: keep the node bridge out of the nimKochBootstrap build
2026-08-30 21:10:49 +02:00
trees.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
treetab.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
typeallowed.nim
fixes #25677; fixes #25678; typeAllowedAux to improve flag handling (#25684)
2026-03-30 15:09:11 +02:00
typekeys.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
types.nim
IC: migrate expr and the emitters — cgen generates from a cursor
2026-08-30 15:43:14 +02:00
typesrenderer.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
varpartitions.nim
fixes #26023; incorrect sink requires a copy (#26028)
2026-08-03 12:02:29 +02:00
vm.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
vmconv.nim
Types: Refactorings; step 1 (#23055)
2023-12-12 16:54:50 +01:00
vmdef.nim
fixes #18367 and #21222; using quote inside static block (#25907)
2026-06-13 07:04:17 +02:00
vmdeps.nim
Fix getTypeImpl not returning defaults (#25592)
2026-03-09 11:59:12 +01:00
vmgen.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
vmhooks.nim
replaces doAssert false with raiseAssert for unreachable branches, which works better with strictdefs (#22436)
2023-08-10 14:26:40 +02:00
vmmarshal.nim
fixes addr/hiddenAddr in strictdefs (#23477)
2024-04-10 14:41:16 +02:00
vmops.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
vmprofiler.nim
rm some cruft (#26113)
2026-08-17 15:02:49 +02:00
vtables.nim
refactoring: better IC + no unique Id (#26137)
2026-08-25 11:59:19 +02:00
wordrecg.nim
Asm syntax pragma (#23119)
2023-12-25 07:12:54 +01:00

readme.md

Nim Compiler

  • This directory contains the Nim compiler written in Nim.
  • Note that this code has been translated from a bootstrapping version written in Pascal.
  • So the code is not a poster child of good Nim code.

See Internals of the Nim Compiler for more information.