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Jakub Ciolek d524e1eccd cmd/compile: on AMD64, turn x < 128 into x <= 127 
x < 128 -> x <= 127
x >= 128 -> x > 127

This allows for shorter encoding as 127 fits into
a single-byte immediate.

archive/tar benchmark (Alder Lake 12600K)

name              old time/op    new time/op    delta
/Writer/USTAR-16    1.46µs ± 0%    1.32µs ± 0%  -9.43%  (p=0.008 n=5+5)
/Writer/GNU-16      1.85µs ± 1%    1.79µs ± 1%  -3.47%  (p=0.008 n=5+5)
/Writer/PAX-16      3.21µs ± 0%    3.11µs ± 2%  -2.96%  (p=0.008 n=5+5)
/Reader/USTAR-16    1.38µs ± 1%    1.37µs ± 0%    ~     (p=0.127 n=5+4)
/Reader/GNU-16       798ns ± 1%     800ns ± 2%    ~     (p=0.548 n=5+5)
/Reader/PAX-16      3.07µs ± 1%    3.00µs ± 0%  -2.35%  (p=0.008 n=5+5)
[Geo mean]          1.76µs         1.70µs       -3.15%

compilecmp:

hash/maphash
hash/maphash.(*Hash).Write 517 -> 510  (-1.35%)

runtime
runtime.traceReadCPU 1626 -> 1615  (-0.68%)

runtime [cmd/compile]
runtime.traceReadCPU 1626 -> 1615  (-0.68%)

math/rand/v2
type:.eq.[128]float32 65 -> 59  (-9.23%)

bytes
bytes.trimLeftUnicode 378 -> 373  (-1.32%)
bytes.IndexAny 1189 -> 1157  (-2.69%)
bytes.LastIndexAny 1256 -> 1239  (-1.35%)
bytes.lastIndexFunc 263 -> 261  (-0.76%)

strings
strings.FieldsFuncSeq.func1 411 -> 399  (-2.92%)
strings.EqualFold 625 -> 624  (-0.16%)
strings.trimLeftUnicode 248 -> 231  (-6.85%)

math/rand
type:.eq.[128]float32 65 -> 59  (-9.23%)

bytes [cmd/compile]
bytes.LastIndexAny 1256 -> 1239  (-1.35%)
bytes.lastIndexFunc 263 -> 261  (-0.76%)
bytes.trimLeftUnicode 378 -> 373  (-1.32%)
bytes.IndexAny 1189 -> 1157  (-2.69%)

regexp/syntax
regexp/syntax.(*parser).parseEscape 1113 -> 1102  (-0.99%)

math/rand/v2 [cmd/compile]
type:.eq.[128]float32 65 -> 59  (-9.23%)

strings [cmd/compile]
strings.EqualFold 625 -> 624  (-0.16%)
strings.FieldsFuncSeq.func1 411 -> 399  (-2.92%)
strings.trimLeftUnicode 248 -> 231  (-6.85%)

math/rand [cmd/compile]
type:.eq.[128]float32 65 -> 59  (-9.23%)

regexp
regexp.(*inputString).context 198 -> 197  (-0.51%)
regexp.(*inputBytes).context 221 -> 212  (-4.07%)

image/jpeg
image/jpeg.(*decoder).processDQT 500 -> 491  (-1.80%)

regexp/syntax [cmd/compile]
regexp/syntax.(*parser).parseEscape 1113 -> 1102  (-0.99%)

regexp [cmd/compile]
regexp.(*inputString).context 198 -> 197  (-0.51%)
regexp.(*inputBytes).context 221 -> 212  (-4.07%)

encoding/csv
encoding/csv.(*Writer).fieldNeedsQuotes 269 -> 266  (-1.12%)

cmd/vendor/golang.org/x/sys/unix
type:.eq.[131]struct 855 -> 823  (-3.74%)

vendor/golang.org/x/text/unicode/norm
vendor/golang.org/x/text/unicode/norm.nextDecomposed 4831 -> 4826  (-0.10%)
vendor/golang.org/x/text/unicode/norm.(*Iter).returnSlice 281 -> 275  (-2.14%)

vendor/golang.org/x/text/secure/bidirule
vendor/golang.org/x/text/secure/bidirule.init.0 85 -> 83  (-2.35%)

go/scanner
go/scanner.isDigit 100 -> 98  (-2.00%)
go/scanner.(*Scanner).next 431 -> 422  (-2.09%)
go/scanner.isLetter 142 -> 124  (-12.68%)

encoding/asn1
encoding/asn1.parseTagAndLength 1189 -> 1182  (-0.59%)
encoding/asn1.makeField 3481 -> 3463  (-0.52%)

text/scanner
text/scanner.(*Scanner).next 1242 -> 1236  (-0.48%)

archive/tar
archive/tar.isASCII 133 -> 127  (-4.51%)
archive/tar.(*Writer).writeRawFile 1206 -> 1198  (-0.66%)
archive/tar.(*Reader).readHeader.func1 9 -> 7  (-22.22%)
archive/tar.toASCII 393 -> 383  (-2.54%)
archive/tar.splitUSTARPath 405 -> 396  (-2.22%)
archive/tar.(*Writer).writePAXHeader.func1 627 -> 620  (-1.12%)

text/template
text/template.jsIsSpecial 59 -> 57  (-3.39%)

go/doc
go/doc.assumedPackageName 714 -> 701  (-1.82%)

vendor/golang.org/x/net/http/httpguts
vendor/golang.org/x/net/http/httpguts.headerValueContainsToken 965 -> 952  (-1.35%)
vendor/golang.org/x/net/http/httpguts.tokenEqual 280 -> 269  (-3.93%)
vendor/golang.org/x/net/http/httpguts.IsTokenRune 28 -> 26  (-7.14%)

net/mail
net/mail.isVchar 26 -> 24  (-7.69%)
net/mail.isAtext 106 -> 104  (-1.89%)
net/mail.(*Address).String 1084 -> 1052  (-2.95%)
net/mail.isQtext 39 -> 37  (-5.13%)
net/mail.isMultibyte 9 -> 7  (-22.22%)
net/mail.isDtext 45 -> 43  (-4.44%)
net/mail.(*addrParser).consumeQuotedString 1050 -> 1029  (-2.00%)
net/mail.quoteString 741 -> 714  (-3.64%)

cmd/internal/obj/s390x
cmd/internal/obj/s390x.preprocess 6405 -> 6393  (-0.19%)

cmd/internal/obj/x86
cmd/internal/obj/x86.toDisp8 303 -> 301  (-0.66%)

fmt [cmd/compile]
fmt.Fprintf 4726 -> 4662  (-1.35%)

go/scanner [cmd/compile]
go/scanner.(*Scanner).next 431 -> 422  (-2.09%)
go/scanner.isLetter 142 -> 124  (-12.68%)
go/scanner.isDigit 100 -> 98  (-2.00%)

cmd/compile/internal/syntax
cmd/compile/internal/syntax.(*source).nextch 879 -> 847  (-3.64%)

cmd/vendor/golang.org/x/mod/module
cmd/vendor/golang.org/x/mod/module.checkElem 1253 -> 1235  (-1.44%)
cmd/vendor/golang.org/x/mod/module.escapeString 519 -> 517  (-0.39%)

go/doc [cmd/compile]
go/doc.assumedPackageName 714 -> 701  (-1.82%)

cmd/compile/internal/syntax [cmd/compile]
cmd/compile/internal/syntax.(*scanner).escape 1965 -> 1933  (-1.63%)
cmd/compile/internal/syntax.(*scanner).next 8975 -> 8847  (-1.43%)

cmd/internal/obj/s390x [cmd/compile]
cmd/internal/obj/s390x.preprocess 6405 -> 6393  (-0.19%)

cmd/internal/obj/x86 [cmd/compile]
cmd/internal/obj/x86.toDisp8 303 -> 301  (-0.66%)

cmd/internal/gcprog
cmd/internal/gcprog.(*Writer).Repeat 688 -> 677  (-1.60%)
cmd/internal/gcprog.(*Writer).varint 442 -> 439  (-0.68%)

cmd/compile/internal/ir
cmd/compile/internal/ir.splitPkg 331 -> 325  (-1.81%)

cmd/compile/internal/ir [cmd/compile]
cmd/compile/internal/ir.splitPkg 331 -> 325  (-1.81%)

net/http
net/http.containsDotDot.FieldsFuncSeq.func1 411 -> 399  (-2.92%)
net/http.isNotToken 33 -> 30  (-9.09%)
net/http.containsDotDot 606 -> 588  (-2.97%)
net/http.isCookieNameValid 197 -> 191  (-3.05%)
net/http.parsePattern 4330 -> 4317  (-0.30%)
net/http.ParseCookie 1099 -> 1096  (-0.27%)
net/http.validMethod 197 -> 187  (-5.08%)

cmd/vendor/golang.org/x/text/unicode/norm
cmd/vendor/golang.org/x/text/unicode/norm.(*Iter).returnSlice 281 -> 275  (-2.14%)
cmd/vendor/golang.org/x/text/unicode/norm.nextDecomposed 4831 -> 4826  (-0.10%)

net/http/cookiejar
net/http/cookiejar.encode 1936 -> 1918  (-0.93%)

expvar
expvar.appendJSONQuote 972 -> 965  (-0.72%)

cmd/cgo/internal/test
cmd/cgo/internal/test.stack128 116 -> 114  (-1.72%)

cmd/vendor/rsc.io/markdown
cmd/vendor/rsc.io/markdown.newATXHeading 1637 -> 1628  (-0.55%)
cmd/vendor/rsc.io/markdown.isUnicodePunct 197 -> 179  (-9.14%)

Change-Id: I578bdf42ef229d687d526e378d697ced51e1880c
Reviewed-on: https://go-review.googlesource.com/c/go/+/639935
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
 		2025-02-16 07:23:13 -08:00
..
abi test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
alias3.dir
…
arenas reflect: fix ArenaNew to match documentation 2023-06-16 17:08:43 +00:00
asmhdr.dir
…
chan
…
closure3.dir cmd/compile: use very high budget for once-called closures 2024-11-22 02:04:41 +00:00
closure5.dir
…
codegen cmd/compile: on AMD64, turn x < 128 into x <= 127 2025-02-16 07:23:13 -08:00
ddd2.dir
…
dwarf
…
fixedbugs cmd/compile: fix sign extension of paired 32-bit loads on arm64 2025-02-15 07:53:28 -08:00
import2.dir
…
import4.dir
…
interface
…
internal/runtime/sys runtime: move getcallersp to internal/runtime/sys 2024-09-17 17:01:20 +00:00
intrinsic.dir runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
ken
…
linkname.dir
…
linknameasm.dir cmd/compile: generate args_stackmap for ABI0 assembly func regardless of linkname 2024-06-07 15:22:22 +00:00
method4.dir
…
retjmp.dir
…
stress test/stress: fix typo in comment 2024-03-25 19:21:35 +00:00
syntax cmd/compile: better error message when offending/missing token is a keyword 2024-11-14 02:14:13 +00:00
typeparam cmd/compile: export/import materialized aliases 2024-04-05 16:29:58 +00:00
uintptrescapes.dir
…
wasmmemsize.dir test: add a test for wasm memory usage 2024-10-28 13:27:58 +00:00
64bit.go
…
235.go
…
README.md internal/testdir: move to cmd/internal/testdir 2023-05-12 17:18:08 +00:00
alg.go
…
alias.go
…
alias1.go
…
alias2.go go/types, types2: qualify named types in error messages with type kind 2024-10-23 04:43:01 +00:00
alias3.go
…
align.go
…
append.go
…
append1.go
…
args.go
…
armimm.go
…
asmhdr.go
…
assign.go sync: add explicit noCopy fields to Map, Mutex, and Once 2024-11-18 18:52:54 +00:00
assign1.go
…
atomicload.go
…
bigalg.go
…
bigmap.go
…
blank.go
…
blank1.go
…
bom.go
…
bombad.go
…
bounds.go
…
cannotassign.go
…
chancap.go
…
chanlinear.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
char_lit.go
…
char_lit1.go
…
checkbce.go cmd/compile: rewrite the constant parts of the prove pass 2024-08-07 16:07:33 +00:00
clear.go
…
clearfat.go
…
closedchan.go
…
closure.go
…
closure1.go
…
closure2.go
…
closure3.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
closure4.go
…
closure5.go
…
closure6.go
…
closure7.go
…
cmp.go
…
cmp6.go
…
cmplx.go
…
cmplxdivide.c
…
cmplxdivide.go
…
cmplxdivide1.go
…
complit.go
…
complit1.go
…
compos.go
…
const.go
…
const1.go
…
const2.go
…
const3.go
…
const4.go
…
const5.go
…
const6.go
…
const7.go
…
const8.go
…
convT2X.go
…
convert.go
…
convert1.go
…
convert2.go
…
convert3.go
…
convert4.go
…
convinline.go
…
convlit.go
…
convlit1.go
…
copy.go
…
copy1.go
…
crlf.go
…
ddd.go
…
ddd1.go
…
ddd2.go
…
decl.go
…
declbad.go
…
defer.go
…
defererrcheck.go test: add open-coded defer tests for too many exits path 2024-07-29 14:30:07 +00:00
deferfin.go
…
defernil.go
…
deferprint.go
…
deferprint.out
…
devirt.go
…
directive.go
…
directive2.go
…
divide.go
…
divmod.go
…
embedfunc.go
…
embedvers.go
…
empty.go
…
env.go test,internal/testdir: don't set GOOS/GOARCH 2023-05-12 12:34:59 +00:00
eof.go
…
eof1.go
…
escape.go
…
escape2.go all: remove newline characters after return statements 2023-12-14 17:22:18 +00:00
escape2n.go all: remove newline characters after return statements 2023-12-14 17:22:18 +00:00
escape3.go
…
escape4.go cmd/compile: retire "IsHiddenClosure" and "IsDeadcodeClosure" 2024-07-22 21:27:37 +00:00
escape5.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_array.go
…
escape_calls.go cmd/compile: fix escape analysis of string min/max 2023-12-05 22:06:07 +00:00
escape_closure.go cmd/compile: retire "IsHiddenClosure" and "IsDeadcodeClosure" 2024-07-22 21:27:37 +00:00
escape_field.go
…
escape_goto.go
…
escape_hash_maphash.go
…
escape_iface.go test: remove *_unified.go variants 2023-05-23 17:16:35 +00:00
escape_indir.go
…
escape_level.go
…
escape_map.go
…
escape_mutations.go cmd/compile: restore zero-copy string->[]byte optimization 2023-08-18 11:58:37 +00:00
escape_param.go
…
escape_reflect.go reflect: remove calling mapiterkey, mapiterelem 2024-09-18 20:57:20 +00:00
escape_runtime_atomic.go runtime: migrate internal/atomic to internal/runtime 2024-03-25 19:53:03 +00:00
escape_selfassign.go
…
escape_slice.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_struct_param1.go
…
escape_struct_param2.go
…
escape_struct_return.go
…
escape_sync_atomic.go
…
escape_unsafe.go
…
fibo.go
…
finprofiled.go test: ignore MemProfileRecords with no live objects in finprofiled.go 2023-11-16 05:48:00 +00:00
float_lit.go
…
float_lit2.go
…
float_lit3.go
…
floatcmp.go
…
for.go test: add test cases for index value with range array clear 2023-07-10 16:36:41 +00:00
func.go
…
func1.go
…
func2.go
…
func3.go go/parser, syntax: better error message for parameter missing type 2024-09-30 22:04:40 +00:00
func4.go
…
func5.go
…
func6.go
…
func7.go
…
func8.go
…
funcdup.go
…
funcdup2.go
…
fuse.go cmd/compile: handle boolean and pointer relations 2024-08-07 16:07:55 +00:00
gc.go
…
gc1.go
…
gc2.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
gcgort.go
…
gcstring.go
…
goprint.go
…
goprint.out
…
goto.go
…
heapsampling.go
…
helloworld.go
…
helloworld.out
…
if.go
…
import.go
…
import1.go
…
import2.go
…
import4.go
…
import5.go
…
import6.go
…
index.go
…
index0.go
…
index1.go
…
index2.go
…
indirect.go
…
indirect1.go
…
init.go
…
init1.go
…
initcomma.go
…
initexp.go
…
initialize.go
…
initializerr.go
…
initloop.go go/types: improve recursive type error message 2024-10-22 22:20:29 +00:00
inline.go cmd/compile: add "deadlocals" pass to remove unused locals 2024-07-30 15:46:27 +00:00
inline_big.go cmd/compile: restore zero-copy string->[]byte optimization 2023-08-18 11:58:37 +00:00
inline_caller.go
…
inline_callers.go
…
inline_endian.go
…
inline_literal.go
…
inline_math_bits_rotate.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
inline_sync.go sync: use atomic.Uint32 in Once 2023-10-06 21:01:50 +00:00
inline_testingbloop.go cmd/compile,testing: implement one-time rampup logic for testing.B.Loop 2024-11-20 23:19:48 +00:00
inline_variadic.go
…
int_lit.go
…
intcvt.go
…
intrinsic.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
intrinsic_atomic.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
iota.go
…
label.go
…
label1.go
…
linkmain.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
linkmain_run.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
linkname.go
…
linkname3.go cmd/compile: disallow linkname referring to instantiations 2024-05-15 19:27:25 +00:00
linknameasm.go cmd/compile: generate args_stackmap for ABI0 assembly func regardless of linkname 2024-06-07 15:22:22 +00:00
linkobj.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
linkx.go
…
linkx_run.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
literal.go
…
literal2.go
…
live.go runtime: rename mapiterinit and mapiternext 2025-01-28 10:54:43 -08:00
live1.go
…
live2.go cmd/compile,internal/runtime/maps: add extendible hashing 2024-10-21 14:16:20 +00:00
live_regabi.go runtime: rename mapiterinit and mapiternext 2025-01-28 10:54:43 -08:00
live_uintptrkeepalive.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
loopbce.go cmd/compile: rewrite the constant parts of the prove pass 2024-08-07 16:07:33 +00:00
mainsig.go
…
makechan.go all: fix some comments 2024-04-04 14:29:45 +00:00
makemap.go
…
makenew.go
…
makeslice.go
…
mallocfin.go
…
map.go
…
map1.go
…
mapclear.go
…
maplinear.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
maymorestack.go
…
mergemul.go
…
method.go
…
method1.go
…
method2.go
…
method3.go
…
method4.go
…
method5.go
…
method6.go
…
method7.go
…
named.go
…
named1.go
…
newinline.go cmd/compile: add "deadlocals" pass to remove unused locals 2024-07-30 15:46:27 +00:00
nil.go
…
nilcheck.go
…
nilptr.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr2.go
…
nilptr3.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr4.go
…
nilptr5.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr5_aix.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr5_wasm.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr_aix.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
noinit.go
…
nosplit.go cmd/internal/objabi, internal/runtime: increase nosplit limit on OpenBSD 2024-12-06 00:35:41 +00:00
nowritebarrier.go cmd/compile: redo IsRuntimePkg/IsReflectPkg predicate 2023-08-22 19:18:21 +00:00
nul1.go
…
opt_branchlikely.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
parentype.go
…
peano.go
…
phiopt.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
print.go
…
print.out
…
printbig.go
…
printbig.out
…
prove.go cmd/compile: establish limits of bool to uint8 conversions 2025-02-05 09:04:25 -08:00
prove_constant_folding.go cmd/compile: rewrite the constant parts of the prove pass 2024-08-07 16:07:33 +00:00
prove_invert_loop_with_unused_iterators.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
range.go
…
range2.go all: rename GOEXPERIMENT=range to rangefunc 2023-11-08 15:32:14 +00:00
range3.go cmd/compile: fix typecheck range over rune literal 2023-12-01 17:20:08 +00:00
range4.go cmd/compile: handle defined iter func type correctly 2024-01-08 16:00:53 +00:00
rangegen.go test: skip rangegen.go on 32-bit platforms 2023-12-18 23:35:19 +00:00
recover.go
…
recover1.go
…
recover2.go
…
recover3.go
…
recover4.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
recover5.go
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reflectmethod1.go
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reflectmethod2.go
…
reflectmethod3.go
…
reflectmethod4.go
…
reflectmethod5.go
…
reflectmethod6.go
…
reflectmethod7.go
…
reflectmethod8.go
…
rename.go
…
rename1.go cmd/compile/internal/types2: only mark variables as used if they are 2023-04-19 14:07:00 +00:00
reorder.go
…
reorder2.go
…
retjmp.go
…
return.go
…
rotate.go
…
rotate0.go
…
rotate1.go
…
rotate2.go
…
rotate3.go
…
rune.go
…
runtime.go
…
shift1.go
…
shift2.go
…
shift3.go
…
sieve.go
…
sigchld.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
sigchld.out
…
simassign.go
…
sizeof.go
…
slice3.go
…
slice3err.go
…
slicecap.go
…
sliceopt.go
…
solitaire.go
…
stack.go
…
stackobj.go
…
stackobj2.go
…
stackobj3.go
…
strcopy.go
…
strength.go
…
string_lit.go
…
stringrange.go
…
struct0.go
…
switch.go
…
switch2.go cmd/compile: better error message when offending/missing token is a keyword 2024-11-14 02:14:13 +00:00
switch3.go
…
switch4.go
…
switch5.go
…
switch6.go
…
switch7.go
…
tailcall.go cmd/compile: emit tail call wrappers when possible 2024-09-09 20:20:10 +00:00
tighten.go cmd/compile: pair loads and stores on arm64 2025-02-13 14:07:47 -08:00
tinyfin.go
…
torture.go
…
turing.go
…
typecheck.go
…
typecheckloop.go
…
typeswitch.go
…
typeswitch1.go
…
typeswitch2.go
…
typeswitch2b.go
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typeswitch3.go
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uintptrescapes.go
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uintptrescapes2.go
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uintptrescapes3.go
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uintptrkeepalive.go
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undef.go
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unsafe_slice_data.go
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unsafe_string.go
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unsafe_string_data.go
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unsafebuiltins.go
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used.go
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utf.go
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varerr.go
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varinit.go
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wasmexport.go cmd/compile: add basic wasmexport support 2024-08-09 20:07:54 +00:00
wasmexport2.go cmd/compile: allow more types for wasmimport/wasmexport parameters and results 2024-11-11 17:11:50 +00:00
wasmmemsize.go test: add a test for wasm memory usage 2024-10-28 13:27:58 +00:00
weak.go weak: prevent unsafe conversions using weak pointers 2025-02-06 13:16:59 -08:00
winbatch.go
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writebarrier.go
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zerodivide.go
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zerosize.go cmd/link: put zero-sized data symbols at same address as runtime.zerobase 2023-04-28 18:35:43 +00:00

README.md

The test directory contains tests of the Go tool chain and runtime. It includes black box tests, regression tests, and error output tests. They are run as part of all.bash.

To run just these tests, execute:

../bin/go test cmd/internal/testdir

To run just tests from specified files in this directory, execute:

../bin/go test cmd/internal/testdir -run='Test/(file1.go|file2.go|...)'

Standard library tests should be written as regular Go tests in the appropriate package.

The tool chain and runtime also have regular Go tests in their packages. The main reasons to add a new test to this directory are:

  • it is most naturally expressed using the test runner; or
  • it is also applicable to gccgo and other Go tool chains.