cmd/compile

replace `//go:notinheap` with runtime/internal/sys.NotInHeapProposal

#46731 opened 1 hour ago by mdempsky

typecheck should insert OCONVIFACE for some OAS2FUNC; possible memory corruption in escape analysisNeedsFix

#46725 opened 19 hours ago by mdempsky

Optimise branches that could be behind other branches, to avoid running those branches when known to be falseNeedsInvestigationPerformance

#46711 opened 2 days ago by JAicewizard

multiple compiler crashes and failures with -G=3NeedsFix

#46704 opened 2 days ago by mdempsky

no debug information emitted for type used only as initializerNeedsInvestigation

#46670 opened 4 days ago by heschi

too much CPU wasted in `token.(*File).SetLines` called from `fakeFileSet`NeedsInvestigation

#46586 opened 1 week ago by g7r

error message dumps internal detailsNeedsFix

#46558 opened 1 week ago by ianlancetaylor

explore optimizations for fixed-length array copiesNeedsInvestigationPerformance

#46529 opened 1 week ago by mdempsky

incorrect DWARF location for runtime.throw's in-paramNeedsInvestigation

#46425 opened 2 weeks ago by thanm

go statement desugaring results in additional allocationsNeedsInvestigationWaitingForInfo

#46349 opened 2 weeks ago by qmuntal

remove assert in internal/noderNeedsFixrelease-blocker

#46329 opened 3 weeks ago by rsc

MTFT benchmark performance regression with register ABINeedsInvestigation

#46216 opened 3 weeks ago by dr2chase

unused codeNeedsFix

#46186 opened 4 weeks ago by cuiweixie

failures with "wait: no child processes" on solaris-amd64-oraclerel since 2021-04-02NeedsInvestigationOS-Solaris

#46135 opened 1 month ago by bcmills

allocate slices lazilyNeedsInvestigationPerformance

#46114 opened 1 month ago by bemasc

treat "d = append(make([]T, 0, len(s)), s...)" as "d = make([]T, len(s)); copy(d, s)"NeedsFixPerformance

#46079 opened 1 month ago by go101

only use sequential compile queue algorithm for -v compiles, not all -c=1 compilesNeedsFix

#46074 opened 1 month ago by mdempsky

optimize program running speed NeedsInvestigation

#46030 opened 1 month ago by aimuz

if -G=3 fully enabled in compiler, 'go test -count=1 -race -run=TestOutput runtime/race" failsNeedsDecision

#46004 opened 1 month ago by danscales

degraded debug info for incoming parameters with regabi enabled

#45945 opened 1 month ago by thanm

unneccesary 0 check in divisionNeedsInvestigationPerformance

#45928 opened 1 month ago by JAicewizard

investigate maintaining TOC register r2 for ppc64x by default.NeedsInvestigationarch-ppc64x

#45925 opened 1 month ago by laboger

export format of untyped constants is unnecessarily restrictedNeedsInvestigation

#45837 opened 1 month ago by griesemer

bad traceback argumentsNeedsDecision

#45728 opened 1 month ago by randall77

DWARF IsStmt flag not set for line although it is executedDebuggingNeedsInvestigation

#45680 opened 1 month ago by mahdi-hm

unexpected crash when using -G=3 with external symbols.NeedsInvestigation

#45597 opened 1 month ago by Gh0u1L5

unnecessary slice literal zeroingNeedsFixPerformance

#45573 opened 2 months ago by icholy

random failure after upgrade to v1.16NeedsInvestigationWaitingForInfo

#45537 opened 2 months ago by fanqiehc

GOEXPERIMENT to add two non-pointer words to iface/efaceNeedsInvestigation

#45494 opened 2 months ago by zephyrtronium

emitted DWARF location for complex128 param is incorrectNeedsInvestigation

#45281 opened 2 months ago by thanm

inaccurate escape to heap messageNeedsInvestigation

#45269 opened 2 months ago by go101

bounds check not eliminatedNeedsFix

#45078 opened 2 months ago by rsc

map lookup with result of inlined method cannot use fast pathNeedsDecisionPerformance

#44898 opened 3 months ago by rogpeppe

pass pointer-shaped receivers using context registerNeedsDecisionPerformancebinary-size

#44827 opened 3 months ago by mdempsky

match Aux/AuxInt more strictly in rewriting rulesNeedsDecision

#44824 opened 3 months ago by cherrymui

binary failed to execute with "This version of %1 is not compatible with the version of Windows you're running."NeedsInvestigationOS-Windows

#44817 opened 3 months ago by bcmills

register ABI bringup testcase failures (tracking issue)

#44816 opened 3 months ago by thanm

regalloc fails to reserve key register (CX) for future codeNeedsInvestigationPerformance

#44671 opened 3 months ago by josharian

unnecessary copy in regallocNeedsInvestigationPerformance

#44670 opened 3 months ago by josharian

avoid unnecessary allocations for consecutive appendsNeedsInvestigationPerformance

#44628 opened 3 months ago by rogpeppe

open-coded defers keep pointer arguments alive past the deferred callNeedsFix

#44623 opened 3 months ago by mdempsky

SIGILL during fixedbugs/issue11656.go on aix-ppc64NeedsInvestigationOS-AIXarch-ppc64x

#44583 opened 3 months ago by bcmills

optimize maps with bool keysNeedsInvestigationPerformance

#44578 opened 3 months ago by go101

ppc64 ISA 3.1 supportNeedsInvestigationarch-ppc64x

#44549 opened 3 months ago by pmur

imperfect compile error messageNeedsInvestigation

#44321 opened 3 months ago by go101

recommend fix when "method has pointer receiver"NeedsDecision

#44201 opened 4 months ago by kstenerud

consider increasing the internal precision limit for integer valuesNeedsDecision

#44057 opened 4 months ago by griesemer

possible miscompilation comparing interface to concrete valueNeedsInvestigation

#44051 opened 4 months ago by josharian

builders are unhappy with dev.typeparamsNeedsInvestigation

#43866 opened 4 months ago by mdempsky

"internal compiler error: curfn mismatch" on darwin-amd64-race builderNeedsInvestigationOS-Darwin

#43826 opened 4 months ago by bcmills

avoidable construction of stack objectsFeatureRequestNeedsFix

#43753 opened 4 months ago by mdempsky

better escape analysis of `[]byte` -> `string` conversionsFeatureRequestNeedsFixPerformance

#43752 opened 4 months ago by mdempsky

better error messages for use of ... with type parametersNeedsFix

#43680 opened 5 months ago by griesemer

unhelpful error message if type assertion has mismatching pointer/non-pointer typeNeedsFixhelp wanted

#43673 opened 5 months ago by mprobst

better optimization/inlining for sort.SearchFeatureRequestNeedsFixPerformance

#43423 opened 5 months ago by yangwenmai

constant indexing to private array should be foldedNeedsFixPerformance

#43403 opened 5 months ago by egonelbre

inefficient assembly code on arm64NeedsInvestigationPerformancearch-arm64

#43357 opened 5 months ago by fkuehnel

panic.Fatalf should not report "use of builtin panic not in function call" but instead "panic.Fatalf undefined (builtin panic has no field or method Fatalf)"NeedsInvestigation

#43285 opened 5 months ago by odeke-em

missed opportunity to coalesce loads that compare with constantsNeedsInvestigationPerformance

#43248 opened 5 months ago by josharian

suboptimal arm64 outputNeedsDecisionPerformancearch-arm64

#43145 opened 6 months ago by FiloSottile

big map literal creation performanceNeedsInvestigationPerformance

#43020 opened 6 months ago by trams

interaction between sync/atomic, -race and go:noraceNeedsDecision

#43007 opened 6 months ago by dvyukov

inlined err check elimination opportunityNeedsInvestigationPerformance

#42999 opened 6 months ago by egonelbre

make encoding/binary.LittleEndian.* have negligible inlining cost on amd64NeedsDecisionPerformance

#42958 opened 6 months ago by josharian

-race does not obey go:nocheckptrNeedsInvestigation

#42880 opened 6 months ago by chewxy

improve "have X want Y" error with additional file and line informationNeedsInvestigation

#42841 opened 6 months ago by raspi

function argument value escapes no matter the run-time conditionNeedsInvestigation

#42781 opened 6 months ago by Julio-Guerra

nil check not scheduled correctlyNeedsInvestigation

#42673 opened 6 months ago by randall77

missed add+load combination opportunityNeedsInvestigationPerformance

#42672 opened 6 months ago by randall77

notice when function variables are never reassigned, avoid indirect callsNeedsInvestigationPerformance

#42569 opened 7 months ago by bradfitz

SIGILL when building golang.org/x/sys/unix on openbsd/arm64NeedsInvestigationOS-OpenBSDarch-arm64

#42517 opened 7 months ago by vext01

rearrange hairyVisitors to reduce struct slop and reclaim 33.33% space wastedNeedsDecision

#42416 opened 7 months ago by odeke-em

go:wasmexport directiveArch-WasmProposalProposal-Hold

#42372 opened 7 months ago by slinkydeveloper

unneeded panicshift for bounded shift amountNeedsInvestigationPerformance

#42179 opened 7 months ago by CAFxX

escape analysis for backing arraysNeedsInvestigation

#42165 opened 7 months ago by snadrus

find a good way to eliminate zero/sign extensions on arm64NeedsInvestigationarch-arm64

#42162 opened 7 months ago by zhangfannie

implicit allocations allowed in the runtimeFeatureRequestNeedsInvestigation

#42158 opened 7 months ago by randall77

inconsistent error message when identifier begins with invalid characterNeedsInvestigation

#42114 opened 7 months ago by smasher164

negative shift check with trailing zerosNeedsInvestigationPerformance

#42094 opened 7 months ago by niaow

not inlined closures can't inline inner closuresNeedsInvestigationPerformance

#41988 opened 8 months ago by DmitriyMV

add variable length [N]T algs, for T in {string, float32, float64, iface}binary-size

#41776 opened 8 months ago by josharian

introduce masked memeqNeedsInvestigationPerformance

#41774 opened 8 months ago by josharian

ICE: panic during late deadcode while compiling (*ServeMux).shouldRedirectRLockedWaitingForInfo

#41770 opened 8 months ago by zhsj

combine BSWAP on amd64NeedsFixPerformancehelp wanted

#41684 opened 8 months ago by josharian

checking pointers for nilness inside a loopNeedsInvestigationPerformance

#41666 opened 8 months ago by seebs

optimize comparisons to min/max (u)ints by checking for overflowNeedsFixPerformancehelp wanted

#41664 opened 8 months ago by josharian

missing BCE case NeedsInvestigation

#41335 opened 9 months ago by choleraehyq

nil pointer panic when building delve in Docker on WindowsNeedsInvestigation

#41257 opened 9 months ago by codinggg

rewrite sequences of mutex callsNeedsInvestigation

#41253 opened 9 months ago by CAFxX

optimize redundant iface->iface type assertionsNeedsInvestigationPerformance

#41174 opened 9 months ago by quasilyte

don't compile some unexported, inlined functionsNeedsInvestigationToolSpeedhelp wanted

#41117 opened 9 months ago by josharian

some missing BCE casesNeedsInvestigationPerformance

#40987 opened 9 months ago by go101

switch to a register-based calling convention for Go functionsProposalProposal-AcceptedProposal-FinalCommentPeriod

#40724 opened 10 months ago by aclements

210

loops prevent bounds checking eliminationNeedsInvestigationPerformance

#40704 opened 10 months ago by elichai

-d=checkptr should provide more details when reporting about conversions that straddle multiple allocationsNeedsInvestigation

#40639 opened 10 months ago by seebs

combine phielim and copyelim into a single pass?NeedsInvestigation

#40610 opened 10 months ago by surechen

unnecessary nil pointer checkNeedsInvestigationPerformance

#40108 opened 11 months ago by randall77

teach prove about range of results of math/bits.*ZerosNeedsInvestigationPerformance

#40084 opened 11 months ago by randall77

teach prove about arguments of & expressionsNeedsInvestigationPerformance

#40083 opened 11 months ago by randall77

reclaim binary size increase from CL 35554 constant to interface allocation optimizationsNeedsInvestigationPerformance

#40039 opened 11 months ago by thepudds

create cheapdeadcodeNeedsInvestigationPerformanceToolSpeed

#39918 opened 11 months ago by josharian

panic: runtime error: floating point error when building on FreeBSD armv6 on RPi-BWaitingForInfo

#39816 opened 11 months ago by seasox

unnecessary bounds check in a loop passed as a closureNeedsInvestigationPerformance

#39756 opened 11 months ago by jordanlewis

optimize xor to complementNeedsInvestigationPerformance

#39710 opened 11 months ago by niaow

inaccurate DWARF location information -> misleading profile

#39667 opened 1 year ago by alandonovan

Allocations leak into outer scopeNeedsInvestigation

#39514 opened 1 year ago by holiman

intrinsify bits.RotateLeft32 on mipsleNeedsInvestigationPerformance

#39139 opened 1 year ago by assadobaid

generated DWARF triggers objdump warning for large uint64 constNeedsInvestigation

#39048 opened 1 year ago by thanm

inconsistent results with gccgoNeedsDecision

#39003 opened 1 year ago by go101

Missed opportunity for post-inlining devirtualizationNeedsInvestigationPerformance

#38992 opened 1 year ago by alex

further improve precision of "has no field or method" by prescriptively mentioning what kind of property it is either "field" or "method"NeedsInvestigation

#38965 opened 1 year ago by odeke-em

package-scope and function-scope types get the same nameNeedsInvestigation

#38893 opened 1 year ago by ianlancetaylor

incorrect type error after "type int64 int32"NeedsInvestigation

#38882 opened 1 year ago by JohnReedLOL

more compact initialization of maps with dynamic contentNeedsInvestigationbinary-size

#38784 opened 1 year ago by martisch

binaries contain many ..type.eq funcsNeedsInvestigationbinary-size

#38782 opened 1 year ago by bradfitz

arch.MAXWIDTH on amd64 out of date?NeedsInvestigation

#38734 opened 1 year ago by mdempsky

experiment with more integer comparison optimizationsPerformance

#38721 opened 1 year ago by mundaym

prove bounds for & of positive valuesNeedsInvestigation

#38717 opened 1 year ago by bmkessler

unify and improve struct/array equality comparisonsNeedsInvestigationPerformancehelp wanted

#38674 opened 1 year ago by josharian

bugs in mips rulesNeedsInvestigation

#38648 opened 1 year ago by randall77

confusing compiler error when using if instead of for with range operator inside anonymous functionNeedsInvestigation

#38624 opened 1 year ago by mzimmerman

optimize bits.OnesCount(x) == 1NeedsInvestigationPerformance

#38547 opened 1 year ago by josharian

improve inline memrun decision in generated alg eq routinesNeedsInvestigationPerformancehelp wanted

#38494 opened 1 year ago by josharian

Eliminate bound checks on access to positive moduloNeedsInvestigationPerformance

#38476 opened 1 year ago by cbeuw

allow inlining of open-coded defer callsNeedsInvestigationPerformance

#38471 opened 1 year ago by prattmic

non-symmetric inline cost when using named vs non-named returnsNeedsDecision

#38419 opened 1 year ago by qmuntal

anonymous structs consume space in binaryNeedsInvestigationbinary-size

#38291 opened 1 year ago by egonelbre

replace CallImport with go:wasmimport directiveProposalProposal-Accepted

#38248 opened 1 year ago by neelance

consider extending '-spectre' option to other architecturesNeedsInvestigationSecurity

#38066 opened 1 year ago by mundaym

user symbols can be in reserved namespaceNeedsFixearly-in-cycle

#37762 opened 1 year ago by Pr0Ger

type safety failure in generic ssa due to representing integer signedness conversions by OpCopyNeedsDecision

#37753 opened 1 year ago by kortschak

avoid unnecessary calls to runtime.panicIndexNeedsInvestigationPerformance

#37740 opened 1 year ago by rillig

delete insertLoopReschedChecks?NeedsDecision

#37737 opened 1 year ago by josharian

inlined messaging is unclear when inlining functions from other packagesNeedsInvestigation

#37704 opened 1 year ago by snadrus

better append of unmodified slicesNeedsInvestigationPerformance

#37694 opened 1 year ago by sylr

__SOURCE__ constant like __FILE__, __LINE__, __FUNCTION__ C++ macroFeatureRequestNeedsInvestigation

#37620 opened 1 year ago by kokizzu

use staticuint64sNeedsFixPerformanceSuggestedhelp wanted

#37612 opened 1 year ago by josharian

branch elimination opportunites when comparing constantsNeedsInvestigationPerformance

#37608 opened 1 year ago by laboger

spurious "cannot use reflect.Kind(9) … as type uint64 in assignment" on darwin-amd64-race builderNeedsInvestigation

#37600 opened 1 year ago by bcmills

a flaw in algebraic simplification rules inside Go compilerNeedsInvestigationPerformance

#37508 opened 1 year ago by true-grue

Investigate regression in vs 1.13NeedsInvestigationPerformance

#37429 opened 1 year ago by dr2chase

add a way to declare variables in rewrite rulesNeedsInvestigation

#37423 opened 1 year ago by josharian

partial cse of phi inputs?NeedsInvestigationPerformance

#37415 opened 1 year ago by josharian

optimize small runtime.memequal callsNeedsFixPerformance

#37275 opened 1 year ago by josharian

combine int tests when comparing against a constant stringNeedsFixPerformance

#37274 opened 1 year ago by josharian

the compiler should probably recognize runtime.GoexitNeedsDecision

#37193 opened 1 year ago by perillo

error has incorrect column numberNeedsInvestigation

#37180 opened 1 year ago by quackenbush

ARM's MOVWnop causes regalloc to insert unnecessary copiesNeedsInvestigationPerformance

#37096 opened 1 year ago by josharian

what exactly should -L flag do?NeedsDecisionearly-in-cycle

#36988 opened 1 year ago by jkassis

it is not possible to prevent FMA with complex valuesNeedsInvestigation

#36971 opened 1 year ago by kortschak

escape analysis on interface callsNeedsInvestigationPerformance

#36964 opened 1 year ago by kirillx

possible latent codegen issue on amd64 removing zero extensionsNeedsInvestigation

#36897 opened 1 year ago by josharian

prove misses obvious facts about constantsNeedsInvestigationPerformance

#36889 opened 1 year ago by josharian

error line number reported is incorrect if it appears after line 0xFFFFFNeedsInvestigation

#36850 opened 1 year ago by icza

set prologue_end on every archDebuggingNeedsDecision

#36612 opened 1 year ago by derekparker

make 64-bit fields be 64-bit aligned on 32-bit systems, add //go:packed directive on structsProposalProposal-Hold

#36606 opened 1 year ago by danscales

decide how to better document -wb write barrier flagDocumentationNeedsDecision

#36597 opened 1 year ago by xaionaro

different behaviors between short and normal variable declarationsNeedsInvestigation

#36449 opened 1 year ago by go101

manually CSE |-combined rules?NeedsInvestigation

#36443 opened 1 year ago by josharian

optimize overhead from CPU feature detectionNeedsInvestigationPerformance

#36351 opened 1 year ago by smasher164

teach prove about incrementing, len, and overflowNeedsInvestigationPerformance

#36346 opened 1 year ago by josharian

Finer grained visibility debug info for variablesDebuggingNeedsInvestigation

#36125 opened 2 years ago by aarzilli

minimize stack live set before a recursive callNeedsInvestigation

#36067 opened 2 years ago by CAFxX

redundant typecheck errors when using map[T]func(Undefined)NeedsInvestigation

#36039 opened 2 years ago by mvdan

-d=checkptr doesn't detect invalid pointer fields in converted pointers-to-structsNeedsInvestigationhelp wanted

#36017 opened 2 years ago by dennwc

unneeded MOV's caused by channel operationsNeedsInvestigationPerformance

#35969 opened 2 years ago by marigonzes

encoded pkg path shown in stack traceNeedsInvestigation

#35558 opened 2 years ago by myitcv

constant inlining happens even when disabling inlining and optimizationsDebuggingNeedsInvestigation

#35527 opened 2 years ago by dlsniper

infinite loop in -m=2NeedsFix

#35518 opened 2 years ago by mdempsky

no closure inlining even in the simple case?NeedsInvestigationPerformance

#35196 opened 2 years ago by ivoras

minimally align variables in memory when -d=checkptr is usedNeedsInvestigationhelp wanted

#35128 opened 2 years ago by mdempsky

review compiler-generated symbol naming schemeNeedsInvestigationhelp wanted

#35088 opened 2 years ago by mdempsky

expected "not used" errorNeedsInvestigation

#35021 opened 2 years ago by serhatgiydiren

consider flagging ops that should not be moved between blocksNeedsInvestigation

#34950 opened 2 years ago by mundaym

unneeded bounds checksNeedsInvestigationPerformance

#34816 opened 2 years ago by marigonzes

inline functions that are called only onceNeedsDecisionPerformance

#34525 opened 2 years ago by marigonzes

use hashing for switch statementsNeedsInvestigationhelp wanted

#34381 opened 2 years ago by mdempsky

output a DW_LNE_end_sequence instruction at the end of every function's line table

#34380 opened 2 years ago by jeremyfaller

align formal parameters with actual argument when reporting incorrect number of argumentsFeatureRequestNeedsInvestigation

#34138 opened 2 years ago by tumdum

optimize conditional pointer assignmentNeedsDecisionPerformance

#34020 opened 2 years ago by marigonzes

does not check go:writebarrierrec for print functionsNeedsInvestigation

#34014 opened 2 years ago by ianlancetaylor

taking address of variables in chain breaks optimizationsNeedsInvestigationPerformance

#33972 opened 2 years ago by marigonzes

duplicate error for invalid complex number const conversionNeedsFix

#33921 opened 2 years ago by pestophagous

incomplete dead code elimination for conditionalNeedsInvestigationPerformancebinary-sizehelp wanted

#33713 opened 2 years ago by marigonzes

reflected methods have extra wrappingNeedsInvestigation

#33641 opened 2 years ago by seebs

mention shadowing of predeclared identifiers in errors they causeNeedsFixhelp wanted

#33567 opened 2 years ago by seebs

runtime.KeepAlive causes useless extra run-time overhead, even though it is an intrinsic?NeedsDecision

#33442 opened 2 years ago by nsajko

'internal compiler error: bvbulkalloc too big' when compiling a file containing a large mapNeedsInvestigation

#33437 opened 2 years ago by mcdee

review "expected expression" error messagesNeedsInvestigation

#33415 opened 2 years ago by griesemer

redundant moves and stack variables when function using bits.Add64 is inlinedNeedsInvestigationPerformance

#33349 opened 2 years ago by renthraysk

unrolled loop results in extra loads/stores (suboptimal schedule?)NeedsInvestigationPerformance

#33251 opened 2 years ago by jeremyfaller

malformed DWARF ranges (child not contained in parent)DebuggingNeedsFix

#33188 opened 2 years ago by thanm

suboptimal code generated for simple integer comparison if-blockNeedsInvestigationPerformance

#33012 opened 2 years ago by tstanev

superfluous MOV instructionsNeedsInvestigationPerformance

#32969 opened 2 years ago by dsnet

ineffective branch caused by deferNeedsInvestigation

#32930 opened 2 years ago by marigonzes

-m output is missing escape informationNeedsInvestigation

#32850 opened 2 years ago by FiloSottile

handle 64-bit masks better on 32-bit systemsNeedsFix

#32781 opened 2 years ago by rsc

multiple ineffective assignmentsNeedsInvestigationPerformance

#32624 opened 2 years ago by marigonzes

replace indirect call with direct call when target is known after inliningNeedsInvestigationPerformance

#32577 opened 2 years ago by marigonzes

similar returns not optimizedNeedsFixPerformance

#32554 opened 2 years ago by marigonzes

prove pass unable to eliminate bounds check when a variable is assigned from lenNeedsInvestigationPerformance

#32515 opened 2 years ago by agnivade

slice hint seems to perform better than loop bound checkNeedsInvestigationPerformance

#32492 opened 2 years ago by agnivade

bce: if slice[n] is in bounds, then slice[:n+1] should have bounds check eliminatedNeedsFixPerformance

#32431 opened 2 years ago by ugorji

prefer to cheaply re-materialize after call site instead of spillingNeedsInvestigationPerformance

#32255 opened 2 years ago by martisch

unneeded stack checks and stack handlingNeedsInvestigationPerformance

#32197 opened 2 years ago by marigonzes

inlining mark elimination is fragileNeedsInvestigation

#32069 opened 2 years ago by josharian

optimize sparse line numberingNeedsInvestigationToolSpeed

#32046 opened 2 years ago by josharian

use slicebytetostringtmp in concatenationNeedsFixPerformance

#31993 opened 2 years ago by dvyukov

suboptimal assembly for a + b + 1NeedsInvestigationPerformance

#31900 opened 2 years ago by josharian

utf8.DecodeRune should be fast/slow-path inlineableNeedsFixPerformance

#31666 opened 2 years ago by josharian

detect and optimize slice insertion idiom append(sa, append(sb, sc...)...)NeedsInvestigationPerformance

#31592 opened 2 years ago by go101

more fine-grained mechanism for escape analysis of assembly functionsNeedsFix

#31525 opened 2 years ago by mdempsky

run escape analysis on SSA formNeedsInvestigation

#31501 opened 2 years ago by mdempsky

additional internal debugging support for escape.goNeedsInvestigation

#31489 opened 2 years ago by mdempsky

ssa debug does not regenerate/update ssa.htmlNeedsInvestigation

#31290 opened 2 years ago by cuonglm

unexpected prove/BCE regressions when building encoding/jsonNeedsInvestigationPerformance

#31275 opened 2 years ago by mvdan

intrinsify math/bits.RotateLeft{32,64} on all architecturesNeedsFixPerformancehelp wanted

#31265 opened 2 years ago by mundaym

loops compiled differently when using range or indexNeedsInvestigationPerformance

#31205 opened 2 years ago by marigonzes

add line numbers for function exit paths?DebuggingNeedsInvestigation

#31199 opened 2 years ago by josharian

unexpected difference in compiled code for returned arrayNeedsInvestigationbinary-size

#31198 opened 2 years ago by marigonzes

reduce function prologue overheadNeedsInvestigationPerformance

#31193 opened 2 years ago by aclements

Optimize three-way string comparisonsNeedsInvestigationPerformance

#31187 opened 2 years ago by ashi009

internal compiler error: Type.Elem UNSAFEPTRNeedsInvestigation

#31174 opened 2 years ago by kirillDanshin

keep variable declaration order in debug_infoDebuggingNeedsInvestigation

#31133 opened 2 years ago by dlsniper

remove unnecessary inline marksNeedsInvestigationPerformance

#31116 opened 2 years ago by marigonzes

pack structs containing anonymous fields more tightlyNeedsInvestigationPerformance

#31047 opened 2 years ago by josharian

runtime check for availability of popcount is spammyNeedsInvestigationPerformance

#30946 opened 2 years ago by seebs

bounds checking for unrolled loops is weirdNeedsInvestigationPerformance

#30945 opened 2 years ago by seebs

lay out global errors.New results in static dataNeedsFixPerformance

#30820 opened 2 years ago by rsc

allow ; on the RHS of rewrite rules for side-effectsNeedsFix

#30818 opened 2 years ago by josharian

add consistency check that local variables are associated with CurfnNeedsInvestigation

#30754 opened 2 years ago by mdempsky

investigate wasm sync inliningArch-WasmNeedsInvestigationPerformance

#30605 opened 2 years ago by bradfitz

provide flags to request just inlining or just escape analysis infoNeedsInvestigation

#30585 opened 2 years ago by josharian

teach prove about minNeedsFixPerformance

#30584 opened 2 years ago by josharian

mid-stack inline dispatch functions that call a function on each pathNeedsInvestigationPerformance

#30548 opened 2 years ago by josharian

unnecessary bounds check for global slicesNeedsInvestigationPerformance

#30529 opened 2 years ago by dsnet

unnecessary hash/eq functions for global arraysNeedsInvestigationPerformance

#30528 opened 2 years ago by dsnet

elide call to runtime.growslice with provable capacity availabilityNeedsInvestigationPerformancebinary-size

#30509 opened 2 years ago by dsnet

clean up recent fix for ginsop2 on ppc64xNeedsFix

#30475 opened 2 years ago by laboger

unnecessary hash/eq functions for slice literalsNeedsInvestigationToolSpeedbinary-size

#30449 opened 2 years ago by neild

'_rt0_amd64_windows_lib' is not called when linking with VS2015NeedsInvestigation

#30347 opened 2 years ago by andreas-jonsson

assembly generated is bigger than previous versionsNeedsInvestigationPerformance

#30229 opened 2 years ago by marigonzes

compileSSA takes a long time on very large (generated) functionsNeedsInvestigationToolSpeed

#30077 opened 2 years ago by udhos

add a README section on developing the compilerDocumentationNeedsInvestigation

#30074 opened 2 years ago by mvdan

confusing error when using a keyword as package memberNeedsFix

#30039 opened 2 years ago by mvdan

variable read should not be optimized when using -gcflags="all=-N -l"DebuggingNeedsFix

#29977 opened 2 years ago by dlsniper

unnecessary bounds checkNeedsInvestigationPerformancehelp wanted

#29872 opened 2 years ago by marigonzes

redundant conditional jumpNeedsInvestigationPerformance

#29853 opened 2 years ago by marigonzes

misleading panic on deferred funcNeedsInvestigation

#29797 opened 2 years ago by dsymonds

eliminate memory allocation for non-int n in slice extension idiomNeedsFixPerformance

#29785 opened 2 years ago by valyala

optimize CAS loopsNeedsInvestigationPerformance

#29716 opened 2 years ago by CAFxX

use memmove to initialize non-global static dataNeedsFixPerformance

#29693 opened 2 years ago by josharian

implement global new(T) without calling newobjectNeedsFixPerformance

#29691 opened 2 years ago by josharian

optimize repeated getg() callsNeedsInvestigationPerformance

#29671 opened 2 years ago by CAFxX

reuse boxed primitive in slice literals of interfacesNeedsInvestigationPerformance

#29574 opened 2 years ago by dsnet

many new no-ops as a result of mid-stack inliningNeedsFix

#29571 opened 2 years ago by laboger

simplify converting a Go function to buildable Go assemblyNeedsDecision

#29538 opened 2 years ago by mvdan

make argument size of -S output more accurateNeedsFix

#29334 opened 2 years ago by mmcloughlin

use bit tests for binary search in type switchesPerformance

#29292 opened 2 years ago by josharian

improve interface dispatch performancePerformance

#29276 opened 2 years ago by robaho

optimize variables in function calls as equivalent to constant-derived variablesNeedsInvestigationPerformance

#29166 opened 2 years ago by notimesea

compiler hangs without optimizationsNeedsInvestigationToolSpeed

#29144 opened 2 years ago by csnitker

better const-based optimizations handling in compiler frontendPerformance

#29095 opened 2 years ago by quasilyte

specialize variadic functionsPerformance

#29085 opened 2 years ago by josharian

statictmps can prevent heap objects from being collectedGarbageCollector

#29068 opened 2 years ago by randall77

minimize morestack calls text footprintNeedsInvestigation

#29067 opened 2 years ago by CAFxX

initialization optimization fails when using -ldflags=-X=VALNeedsFix

#28969 opened 2 years ago by tjamet

consider teaching prove about unexported integer fieldsPerformance

#28952 opened 2 years ago by mvdan

BCE is better with reslicing than index variablesPerformance

#28942 opened 2 years ago by mvdan

teach prove about slice expressionsPerformance

#28941 opened 2 years ago by mvdan

fuse constant comparison with division by a constantPerformance

#28861 opened 2 years ago by benshi001

refine calcHasCall's handling of ODIV and OMODNeedsFixSuggested

#28698 opened 2 years ago by josharian

various low level x86 instruction generation improvementsNeedsInvestigationPerformanceSuggestedhelp wanted

#28671 opened 2 years ago by martisch

reduce generated algs for compiler created array typesNeedsInvestigationPerformance

#28639 opened 2 years ago by martisch

thread support for webassemblyArch-WasmFeatureRequestNeedsDecision

#28631 opened 2 years ago by sleagon

liveness analysis conservative for compound objectsGarbageCollector

#28626 opened 2 years ago by randall77

can't break on inlined functionNeedsInvestigation

#28603 opened 2 years ago by aclements

cleanup compiler flag processingNeedsFixSuggested

#28570 opened 2 years ago by griesemer

the DW_AT_location of the return value is empty when its name is not specifiedDebuggingNeedsFix

#28416 opened 2 years ago by ks888

provide a more explanatory error message on trying to take the address of an unaddressable value e.g. constants, integer and string literalsNeedsDecision

#28393 opened 2 years ago by deanveloper

recognize rand.Intn() is bounded for BCEPerformance

#28314 opened 2 years ago by marigonzes

"invalid recursive type" should abortNeedsInvestigation

#28294 opened 2 years ago by bep

feedback-guided optimizationPerformanceumbrella

#28262 opened 2 years ago by josharian

add column info to export dataNeedsFix

#28259 opened 2 years ago by alandonovan

clearer error message for unkeyed composite literal with unexported fieldNeedsFixhelp wanted

#28053 opened 2 years ago by pjebs

optimize field access after type assertionPerformance

#28045 opened 2 years ago by rillig

"goto jumps over declaration" error is unclear for multiple jumped declsNeedsFix

#27912 opened 2 years ago by willfaught

unexpected performance difference accessing slices with different capsNeedsFixPerformance

#27857 opened 2 years ago by iand

string concatenation specializations for performanceNeedsInvestigationPerformance

#27801 opened 2 years ago by quasilyte

detect and apply more CMOV optimizationsNeedsInvestigationPerformance

#27780 opened 2 years ago by agnivade

automatically stack-allocate small non-escaping slices of dynamic sizePerformance

#27625 opened 2 years ago by rasky

BCE optimizes less for string than sliceNeedsInvestigationPerformance

#27585 opened 2 years ago by go101

eliminate unnecessary extend-of-truncate calculations in prove passNeedsInvestigationPerformance

#27572 opened 2 years ago by josharian

pointers passed to cgo escape to the heapNeedsInvestigation

#27538 opened 2 years ago by FiloSottile

autotemps can make stack frame too largeNeedsFix

#27447 opened 2 years ago by randall77

internal compiler error: name too longNeedsInvestigation

#27256 opened 2 years ago by elagergren-spideroak

mipsle: running error SIGILL: illegal instructionNeedsInvestigation

#27236 opened 2 years ago by wumao

"internal compiler error: weird decoding" on Raspberry Pi with Go 1.11NeedsInvestigation

#27228 opened 2 years ago by mooneyr

understand Go vs assembly rc4 resultsNeedsInvestigationPerformance

#27184 opened 2 years ago by bradfitz

rename a bunch of things

#27167 opened 2 years ago by josharian

optimise ranges over string(byteSlice)NeedsInvestigationPerformance

#27148 opened 2 years ago by mvdan

Fannkuch benchmark performance regressionNeedsInvestigationPerformance

#27108 opened 2 years ago by kklobe

split up SSA rewrite passes

#27034 opened 2 years ago by mundaym

provide parameter escape information in DWARFDebugging

#27007 opened 2 years ago by heschi

recognize map-copy with range idiomNeedsInvestigationPerformance

#26951 opened 2 years ago by martisch

pack info into low bits of interface type pointersNeedsDecisionPerformance

#26680 opened 2 years ago by josharian

optimise away deferred calls to empty functionsNeedsFixPerformancehelp wanted

#26534 opened 2 years ago by ainar-g

constant string -> []byte and []byte -> string conversions aren't constant foldedNeedsInvestigationPerformance

#26498 opened 2 years ago by FMNSSun

consider using DWARF 5DebuggingNeedsDecision

#26379 opened 2 years ago by aclements

internal prefix paths leaking into generated DWARFDebuggingNeedsFix

#26311 opened 2 years ago by thanm

teach prove about more type conversion operationsNeedsInvestigationPerformance

#26299 opened 2 years ago by mvdan

debug info for inlined funcs are sometimes lostDebuggingNeedsInvestigation

#26206 opened 2 years ago by hyangah

msan cannot handle structs with paddingNeedsInvestigation

#26167 opened 2 years ago by benesch

record and use per-function optimization dataNeedsInvestigationPerformance

#25999 opened 3 years ago by josharian

possible missed optimization in append benchmarkNeedsInvestigationPerformance

#25916 opened 3 years ago by perillo

merge sequential memory moves into bigger memory movesNeedsInvestigationPerformance

#25866 opened 3 years ago by valyala

teach prove.go that {strings|bytes}.Index* return value in the range [-1 .. len(s))NeedsInvestigationPerformance

#25862 opened 3 years ago by valyala

cannot handle alias type declarationNeedsFixearly-in-cycle

#25838 opened 3 years ago by griesemer

combine append callsPerformance

#25828 opened 3 years ago by quasilyte

detect divisions that always result in 0NeedsDecisionPerformance

#25733 opened 3 years ago by davecheney

cannot import "./package" on Windows NeedsInvestigationOS-Windowshelp wanted

#25693 opened 3 years ago by ysmolsky

inconsistent acceptance of cyclic variable declaration (esoteric)NeedsInvestigation

#25677 opened 3 years ago by griesemer

confusing internal error when importing different packages with same name from different pathsNeedsFix

#25635 opened 3 years ago by griesemer

add GOAMD64 architecture variantsPerformance

#25489 opened 3 years ago by josharian

revisit statement boundaries CL peformance and binary size impactNeedsInvestigationToolSpeed

#25426 opened 3 years ago by josharian

aggressive IMUL rewrites on AMD64 sometimes lead to performance regressionsNeedsInvestigationPerformance

#25358 opened 3 years ago by quasilyte

call memmove on amd64 for large OpMoveNeedsInvestigationPerformance

#25317 opened 3 years ago by TocarIP

incorrect error for function conversion based on cyclic definition (esoteric)NeedsInvestigation

#25305 opened 3 years ago by griesemer

tweak branchelim heuristic on amd64Performance

#25298 opened 3 years ago by TocarIP

recursive embedded interface types cause stack overflowNeedsInvestigation

#25262 opened 3 years ago by nathanjcochran

BCE/Prove do not take arithmetic into accountNeedsInvestigation

#25197 opened 3 years ago by navytux

elide useless type assertionPerformance

#25189 opened 3 years ago by dsnet

detect bounded shifts of the form (bits-var) in provePerformance

#25169 opened 3 years ago by josharian

detect bounded shifts in generic rulesPerformance

#25168 opened 3 years ago by josharian

use bounded shift information on non-amd64 architecturesPerformanceSuggestedhelp wanted

#25167 opened 3 years ago by josharian

emit variable byte-sized bit tests on amd64Performance

#25156 opened 3 years ago by josharian

eliminate more dead storesPerformancebinary-size

#25132 opened 3 years ago by TocarIP

take into account that floating point special cases (NaN, Inf) are unlikelyPerformancehelp wanted

#25125 opened 3 years ago by mundaym

regalloc's liveness analysis is quadraticToolSpeed

#25120 opened 3 years ago by josharian

prove pass doesn't draw signed int conclusions from range checksPerformance

#25115 opened 3 years ago by josharian

optimize unaligned load-XOR-store on byte slicesPerformance

#25111 opened 3 years ago by mundaym

use bounds from prove pass to simplify shiftsPerformance

#25087 opened 3 years ago by josharian

add bounds information from non-control ops to prove passPerformance

#25086 opened 3 years ago by josharian

sometimes issue rematerializable values earlyPerformance

#24930 opened 3 years ago by josharian

avoiding zeroing new allocations when possiblePerformance

#24926 opened 3 years ago by josharian

compiler variable folding can break linker's -X optionNeedsInvestigation

#24890 opened 3 years ago by simonklb

bounds check elimination for `if len(x) > 32 { ...; x = x[8:]; ... }`NeedsFixPerformance

#24876 opened 3 years ago by dgryski

type-check cmd/compile/internal/syntax nodes directly

#24780 opened 3 years ago by griesemer

unexpected memequal call in short string comparisonNeedsFixPerformanceSuggestedhelp wanted

#24765 opened 3 years ago by bradfitz

incorrect error message when assigning an interface to a constantNeedsFixearly-in-cycle

#24755 opened 3 years ago by mundaym

inconsistent behaviors in judging whether or not two types are identicalNeedsFixearly-in-cycle

#24721 opened 3 years ago by dotaheor

incorrect column reported for "struct literal does not implement" errorNeedsFix

#24689 opened 3 years ago by dhowden

Fannkuch11 can be speed up by ~ 30% via improving BCENeedsFixPerformance

#24660 opened 3 years ago by navytux

eliminate empty switch casesNeedsFixPerformance

#24650 opened 3 years ago by josharian

document emitptrargsmap onebitwalktype1 callsDocumentationNeedsFix

#24648 opened 3 years ago by josharian

opt: reuse interface payload during interface conversionPerformance

#24582 opened 3 years ago by alandonovan

less optimized AMD64 codeNeedsFixPerformance

#24537 opened 3 years ago by benshi001

optimize large structsNeedsFixPerformance

#24416 opened 3 years ago by randall77

keeping a subset of a struct value's fields is slowPerformance

#24386 opened 3 years ago by mvdan

slice update with self subslice - write barrier probably not needed (?)Performance

#24314 opened 3 years ago by navytux

esc.go fails to mark anonymous receiver parameters as non-escapingNeedsFix

#24305 opened 3 years ago by mdempsky

struct field alive too longNeedsFix

#24263 opened 3 years ago by randall77

loop optimizationNeedsInvestigationPerformance

#24240 opened 3 years ago by MichaelTJones

revisit append codegenPerformance

#24209 opened 3 years ago by josharian

tighten CFG as well as valuesPerformance

#24177 opened 3 years ago by josharian

use runtime.zeroVal for small zero-valued readonly static varsPerformance

#23948 opened 3 years ago by josharian

optimize comparison of large values with zeroPerformance

#23929 opened 3 years ago by josharian

avoid updating capacity if unusedNeedsFixPerformance

#23832 opened 3 years ago by dsnet

use strings.BuilderSuggestedToolSpeedhelp wanted

#23828 opened 3 years ago by josharian

better error message for failed string conversionNeedsFix

#23813 opened 3 years ago by griesemer

stack allocate string and slice headers when passed through non-escaping interfacesNeedsFixPerformance

#23676 opened 3 years ago by dsnet

bad line number in error message calling variadic functionNeedsFix

#23660 opened 3 years ago by josharian

conversion error is a bit inaccurate

#23394 opened 3 years ago by hirochachacha

inefficient CALL setup when more than 32bytes of argsPerformance

#23377 opened 3 years ago by ALTree

validity of program depends on method declaration order

#23202 opened 3 years ago by griesemer

more helpful "is not a type" error when variable shadows typeNeedsFixhelp wanted

#23065 opened 3 years ago by cramertj

slicing can be improved on ARMPerformance

#23006 opened 3 years ago by rasky

eliminate runtime.conv* calls with unused resultsNeedsFixPerformancebinary-size

#22971 opened 3 years ago by pavel

implement powerpc 32-bit backend (ppc32)FeatureRequest

#22885 opened 3 years ago by rasky

cannot compile valid (but esoteric) self-recursive interface

#22825 opened 3 years ago by griesemer

reordering struct field accesses can alter performanceNeedsInvestigationPerformance

#22479 opened 3 years ago by mvdan

escape analysis loopdepth should reset when blocks endNeedsInvestigation

#22438 opened 3 years ago by mdempsky

generate correct DW_AT_external flagDebuggingNeedsFix

#22399 opened 3 years ago by thanm

odd inlining heuristic under mid-stack inliningNeedsInvestigationPerformance

#22310 opened 3 years ago by mdempsky

regression in TestIntendedInlining on ppc64x, othersNeedsInvestigation

#22239 opened 3 years ago by laboger

consider adding sibling links to generated DWARFDebuggingNeedsInvestigation

#22185 opened 3 years ago by thanm

wrong line offset for "cannot use ... in argument" errorNeedsFix

#22167 opened 3 years ago by rsc

move DWARF go.info.* symbol generation out of the linkerNeedsInvestigation

#22094 opened 3 years ago by crawshaw

avoid allocations for some return valuesNeedsInvestigationPerformance

#22081 opened 3 years ago by crawshaw

redundant branchPerformance

#22025 opened 3 years ago by randall77

don't depend on statictmp_ variables being read onlyNeedsFix

#21940 opened 3 years ago by randall77

cleaner solution for exporting linkname infoearly-in-cycle

#21936 opened 3 years ago by mdempsky

constant folding math/bits functionsPerformanceSuggestedhelp wanted

#21872 opened 3 years ago by markus-oberhumer

errors involving aliased types should use the alias nameNeedsFix

#21866 opened 3 years ago by bcmills

failure to reject initialization loopNeedsFix

#21752 opened 3 years ago by mdempsky

obscure initialization loop error message due to inliningNeedsFix

#21750 opened 3 years ago by dvyukov

avoid slow versions of LEA instructions on x86NeedsFixPerformanceearly-in-cycle

#21735 opened 3 years ago by martisch

optimize away some MOVQconvertsPerformance

#21572 opened 3 years ago by josharian

functions are inlined beyond boundary of shared librariesNeedsFix

#21510 opened 3 years ago by hirochachacha

optimize unsigned comparisons with zero/onePerformanceSuggestedhelp wanted

#21439 opened 3 years ago by josharian

coalesce consecutive calls to print/printlnNeedsDecisionPerformance

#21417 opened 3 years ago by josharian

improve codegen for nested if statementsPerformance

#21394 opened 3 years ago by josharian

gdb 8 on windows crashes reading Go binaryNeedsInvestigationOS-Windows

#21380 opened 3 years ago by kjk

add and use go:nosplitrec compilation directiveNeedsFix

#21314 opened 3 years ago by ianlancetaylor

incorrect type assertions on conflicting package namesNeedsFix

#21282 opened 3 years ago by dsnet

late nilcheck elim doesn't elim later nilcheck

#20962 opened 3 years ago by josharian

CSE some function calls args/resultsPerformanceToolSpeed

#20934 opened 3 years ago by josharian

[]byte(string) incurs allocation even when it does not escapeNeedsFixPerformancehelp wanted

#20881 opened 4 years ago by rogpeppe

add OpAMD64CMPptr and friends?NeedsDecision

#20873 opened 4 years ago by josharian

generate same code regardless of whether return values are namedNeedsFix

#20859 opened 4 years ago by bradfitz

improve escape analysis of make([]T, n) where n is non-constantPerformance

#20533 opened 4 years ago by alandonovan

include certain NOP instructions when compiler optimizations are disabledDebuggingFeatureRequestNeedsFix

#20487 opened 4 years ago by dlsniper

init code or linker should verify package "fingerprint"NeedsFixhelp wanted

#20486 opened 4 years ago by griesemer

improve loop rotationPerformance

#20411 opened 4 years ago by josharian

lay out loop-free, likeliness-free control flow more compactlyPerformance

#20356 opened 4 years ago by josharian

trim more blocks?Performance

#20354 opened 4 years ago by josharian

inlining isn't performed on generated init functions early-in-cycle

#20321 opened 4 years ago by tzneal

missing line numbers with cgo pragmasNeedsInvestigation

#20214 opened 4 years ago by josharian

move arch-specific rewrite rules and ops into arch-specific packagesNeedsFixPerformanceToolSpeed

#20104 opened 4 years ago by josharian

big binary and slow compilation times with maps & []interface{} in static codeNeedsInvestigationToolSpeed

#20095 opened 4 years ago by philpennock

add special binary export encoding for iotas?ToolSpeed

#20088 opened 4 years ago by josharian

postpone argument conversions after inliningNeedsFixPerformance

#20087 opened 4 years ago by rasky

channel element type too large compiling errors are not reported for channels named with blank identiferNeedsFix

#20027 opened 4 years ago by go101

some problems on optimization when takes care about of arrays in structNeedsFixPerformancehelp wanted

#20022 opened 4 years ago by zhaozhiqianghw

big array not allocated on heap, which make program panic.NeedsFix

#20021 opened 4 years ago by go101

go:linkname prevents inliningPerformance

#20019 opened 4 years ago by dvyukov

remove Type.VargenNeedsFix

#19878 opened 4 years ago by josharian

possible infinite recursion in Type.cmpNeedsInvestigation

#19869 opened 4 years ago by josharian

share statictmpPerformance

#19818 opened 4 years ago by QuestionPython

avoid copying if copied value isn't modifiedPerformance

#19817 opened 4 years ago by valyala

slow to compile large map literals containing dynamic elementsToolSpeed

#19751 opened 4 years ago by myleshorton

clumsy rematerialization in mapassign_fast*Performance

#19733 opened 4 years ago by philhofer

arm64: emit double-register loads and stores in loweringNeedsFixPerformance

#19715 opened 4 years ago by philhofer

Unnecessary register high-bytes rezeroing after unsigned right shiftPerformance

#19712 opened 4 years ago by navytux

eliminate base.Pos and ir.CurFuncNeedsFixhelp wanted

#19683 opened 4 years ago by mdempsky

use FP-based frame zeroing outside of package runtime on plan9OS-Plan9Performance

#19650 opened 4 years ago by mdempsky

avoid multiple returns from deferproc

#19466 opened 4 years ago by randall77

method is inlined instead of loaded from shared library

#19398 opened 4 years ago by davidlazar

an FSM with ~40k states takes a lot of memory to buildToolSpeed

#19379 opened 4 years ago by opennota

needlessly early return value loads in runtime.scanobjectPerformance

#19195 opened 4 years ago by josharian

rewrite interface args by actual type args in functions called only with a single set of argument typesPerformance

#19165 opened 4 years ago by valyala

checking len(data) and erroring out if too small does not help BCENeedsFixPerformance

#19126 opened 4 years ago by navytux

add tool for understanding/debugging SSA rules

#19013 opened 4 years ago by josharian

Fannkuch11 on AMD64 slow down 6% after removing assembler backend instruction reorderingPerformance

#18977 opened 4 years ago by cherrymui

1.7 compiler does not compile program with large complex struct

#18920 opened 4 years ago by rdvorak

optimize Write([]byte(stringVal)) to not copy the stringPerformance

#18822 opened 4 years ago by ianlancetaylor

order.go is outdatedPerformanceToolSpeed

#18739 opened 4 years ago by josharian

performance problems with many long, exported identifiersNeedsInvestigationToolSpeed

#18602 opened 4 years ago by cretz

fixedbug/issue10958.go failuresNeedsInvestigationTesting

#18589 opened 4 years ago by ALTree

improve code generation for temporary slice copy and inliningPerformance

#18529 opened 4 years ago by rasky

investigate closure capture issueNeedsInvestigationPerformance

#18300 opened 4 years ago by bradfitz

some local variables are missing from DWARFDebugging

#18247 opened 4 years ago by alandonovan

improve map iterationPerformance

#18004 opened 4 years ago by cherrymui

insertVarPhis is very slowToolSpeed

#17926 opened 4 years ago by dvyukov

elide branches that must be takenPerformance

#17862 opened 4 years ago by dsnet

implement duffcopy on ppc64xNeedsDecisionPerformance

#17842 opened 4 years ago by bradfitz

merge order/walk/instrument into buildssaToolSpeed

#17728 opened 4 years ago by mdempsky

remove all pointers from type information

#17724 opened 4 years ago by crawshaw

use better code for slicingPerformance

#17638 opened 4 years ago by randall77

optimize functions into boolean expressionsPerformance

#17622 opened 4 years ago by dsnet

improve inlining cost modelNeedsInvestigationPerformanceToolSpeed

#17566 opened 4 years ago by josharian

-bench should correct for GCNeedsFix

#17434 opened 4 years ago by mdempsky

large arrays cause large binaries and toolchain errorsNeedsDecision

#17378 opened 4 years ago by crawshaw

eliminate more bounds checksPerformance

#17370 opened 4 years ago by carl-mastrangelo

add line numbers for values and blocks at HTML SSA output?NeedsFix

#17314 opened 4 years ago by dAdAbird

optimize f32Slice[i] += 1 across math.Float32bits, Float32frombitsNeedsFix

#17220 opened 4 years ago by nigeltao

elimination of unused runtime callsPerformancebinary-size

#17216 opened 4 years ago by DmitriyMV

optimizing multiple accesses to same key in mapNeedsFixPerformance

#17133 opened 4 years ago by rasky

avoid reloads of temp register on ppc64le, othersNeedsFixPerformance

#17110 opened 4 years ago by laboger

combine contiguous multi-byte comparisons to a constantPerformance

#17106 opened 4 years ago by josharian

reuse algs for [N]T arrays

#17031 opened 4 years ago by mdempsky

make algs content-addressablebinary-size

#17029 opened 4 years ago by josharian

detect call trees that can be marked NOSPLITPerformance

#17023 opened 4 years ago by josharian

use common ancestor blocks in CSE?Performance

#16973 opened 4 years ago by josharian

move most (*Type).IsFoo methods to (EType).IsFooNeedsFixearly-in-cycle

#16929 opened 4 years ago by mdempsky

inline reflect.TypeOf (or make it intrinsic)Performance

#16869 opened 4 years ago by bradfitz

teach BCE about copy return valuePerformance

#16833 opened 4 years ago by josharian

should recognize binary package and intrinsify it where possiblePerformance

#16832 opened 4 years ago by dr2chase

make SSA IDs stable across passesNeedsFix

#16754 opened 4 years ago by bradfitz

move SSA boolean optimizations to generic level

#16747 opened 4 years ago by josharian

print better error message when assigning to keywords

#16521 opened 4 years ago by dsnet

lower % using multiply and subtract when the result of / is knownPerformance

#16416 opened 4 years ago by josharian

new backend; multiple efficiency issues...NeedsFixPerformance

#16192 opened 5 years ago by GordonBGood

go1.7beta2 performance regression (floats and arrays)NeedsInvestigationPerformance

#16187 opened 5 years ago by taruti

go1.7beta2 performance regressionNeedsFixPerformance

#16141 opened 5 years ago by samuel

poor register allocator behavior in compression codeNeedsFixPerformance

#16122 opened 5 years ago by flanglet

do front-end constant evaluation across simple inlined function boundariesNeedsFixPerformance

#16108 opened 5 years ago by josharian

complicated bounds check eliminationNeedsFixPerformance

#16092 opened 5 years ago by GordonBGood

escape analysis of interface calls to non-exported method names

#16001 opened 5 years ago by mdempsky

SSA performance regression due to array zeroingNeedsFixPerformance

#15925 opened 5 years ago by hydroflame

don't copy static array in range statementNeedsFixPerformanceearly-in-cycle

#15812 opened 5 years ago by randall77

loads/constants not lifted out of loopNeedsFixPerformance

#15808 opened 5 years ago by randall77

misleading error for multiple value function call in contexts that do accept multiple values

#15785 opened 5 years ago by tmielcza

poor error message when invoking method on embedded typeNeedsFix

#15711 opened 5 years ago by dsymonds

make ascompatte generate less garbageNeedsFix

#15665 opened 5 years ago by josharian

better error message for scoped type errorNeedsFix

#15575 opened 5 years ago by gouthamve

support inlining non-escaping closuresPerformance

#15561 opened 5 years ago by josharian

SSA performance regression on polygon codeNeedsFixPerformanceearly-in-cycle

#15532 opened 5 years ago by nkovacs

evaluate the need for shortcircuitNeedsInvestigationPerformanceearly-in-cycle

#15512 opened 5 years ago by brtzsnr

spurious "cannot use _ as value" errorNeedsFixearly-in-cycle

#15481 opened 5 years ago by adonovan

off-by-many in line number reported for compile errorNeedsFix

#15459 opened 5 years ago by dominikh

unexplained allocation for convT2IPerformance

#15451 opened 5 years ago by robpike

ephemeral slicing doesn't need protection against next object pointersPerformance

#15397 opened 5 years ago by randall77

eliminate all (some?) convT2{I,E} callsNeedsFixPerformanceearly-in-cycle

#15375 opened 5 years ago by randall77

move Type.Width and Type.Align into Extra fieldsToolSpeed

#15308 opened 5 years ago by josharian

combine extension with register loads and stores on amd64Performance

#15300 opened 5 years ago by josharian

sync/atomic.SwapPointer arguments escape for the wrong reasonNeedsFix

#15283 opened 5 years ago by aclements

eliminate write barrier for self-referencing pointerPerformance

#15238 opened 5 years ago by randall77

suboptimal compilation of struct-valued switch statementsPerformance

#15164 opened 5 years ago by mdempsky

possible inlining bug with variable renaming?

#15111 opened 5 years ago by griesemer

make available as a libraryNeedsDecision

#15108 opened 5 years ago by ghost

combine AND 0xff and MOVQload into MOVBQZXloadPerformance

#15105 opened 5 years ago by martisch

merge TPTR32 and TPTR64 into TPTR?

#15032 opened 5 years ago by mdempsky

unnecessary branchingPerformance

#15031 opened 5 years ago by randall77

BLAS Idamax regressionNeedsFixPerformanceearly-in-cycle

#14995 opened 5 years ago by btracey

confusing type checking errorNeedsFix

#14948 opened 5 years ago by aclements

consider write barrier short-circuit when *dst == srcPerformance

#14921 opened 5 years ago by josharian

improve escape analysis understanding of tree structures

#14858 opened 5 years ago by josharian

unnecessary bounds checks are not removedPerformance

#14808 opened 5 years ago by brtzsnr

for-loops cannot be inlinedPerformance

#14768 opened 5 years ago by dsnet

let SSA store to PPARAMOUT variables earlier than returnNeedsFixPerformanceearly-in-cycle

#14762 opened 5 years ago by randall77

redundant loop generated for comparing/hashing arrays of size 1.Performance

#14723 opened 5 years ago by brtzsnr

performance of embedded interfaces

#14677 opened 5 years ago by OneOfOne

type checking fails in cycle involving recursive struct and unsafe.SizeofNeedsFix

#14620 opened 5 years ago by rsc

SSA, don't re-copy spilled output parametersPerformance

#14586 opened 5 years ago by randall77

coverage instrumentation for fuzzingFeatureRequestNeedsFix

#14565 opened 5 years ago by dvyukov

recognize append loopPerformance

#14325 opened 5 years ago by bradfitz

stack overflow accessing large return valueNeedsFix

#14028 opened 5 years ago by Opposition

Need better type propagationPerformance

#14018 opened 5 years ago by dr2chase

escape analysis overconservative for recursive callsNeedsFix

#13547 opened 5 years ago by dr2chase

storing pointer of a local value escapesPerformance

#13493 opened 5 years ago by dsnet

Suggest typo fixes for resolution errorsNeedsInvestigation

#13477 opened 5 years ago by Manishearth

performance issue with ranging over stringPerformance

#13162 opened 5 years ago by mpvl

turn nilcheckelim into branchelimNeedsFixPerformance

#12628 opened 5 years ago by josharian

disambiguate package short names in "is not assignable" compile errors

#12399 opened 5 years ago by doherty

some large-temp-heap-allocations need to be moved before escape analysis

#10936 opened 6 years ago by dr2chase

constant indexing into map literals should be folded

#10848 opened 6 years ago by mdempsky

inefficient increment of global array

#10432 opened 6 years ago by dvyukov

use conditional execution in place of branches for small blocks on arm

#10382 opened 6 years ago by josharian

assigning large values does not use memmove

#10362 opened 6 years ago by davecheney

inline function calls that return a closureNeedsInvestigationPerformance

#10292 opened 6 years ago by potocnyj

improve generated type equality code

#9930 opened 6 years ago by josharian

better error message when attempting to use a shadowed type name

#9655 opened 6 years ago by pwaller

enhancements to the gc inliner and optimizer

#9337 opened 6 years ago by tildeleb

package type name collision with built-in types in compiler error messagesNeedsFix

#8983 opened 6 years ago by gopherbot

optimisations change the behaviour of *struct{}

#8938 opened 6 years ago by ainar-g

recognize case <-time.After(x)Performance

#8895 opened 6 years ago by dvyukov

confusing error messages when a type is repeatedSuggested

#8853 opened 6 years ago by btracey

merge temporaries more aggressivelyNeedsFixPerformance

#8740 opened 6 years ago by josharian

random performance fluctuations after unrelated changesNeedsFixPerformance

#8717 opened 6 years ago by dvyukov

In struct literals, type check outside in rather than inside out.

#8659 opened 6 years ago by btracey

gc inconsistent about reporting "unused variable" errorsNeedsFixearly-in-cycle

#8560 opened 6 years ago by adonovan

Manually calling init should provide a better error message, currently says "undefined: init"NeedsFix

#8481 opened 6 years ago by augustoroman

Wrong type reported for constant in type mismatch report

#8409 opened 6 years ago by btracey

Debug information missing : no stack info , no variables info using gdb

#8357 opened 7 years ago by gopherbot

Opportunity for de-pessimization in provably const range loopsSuggested

#8346 opened 7 years ago by thockin

does not understand old linker flags

#8104 opened 7 years ago by dvyukov

report all missing methods on failed interface satisfaction

#8095 opened 7 years ago by btracey

rethink temporary names

#7923 opened 7 years ago by josharian

bootstrap array causes bytes.Buffer to always be heap-allocatedNeedsFixhelp wanted

#7921 opened 7 years ago by lukescott

don't use REP prefix for reverse-order copying on amd64, 386

#7681 opened 7 years ago by randall77

recognize x[:] of global array x as static data

#7651 opened 7 years ago by mpvl

combine slice header and backing array for static slices into a single symbol

#7637 opened 7 years ago by josharian

do more static initialization at compile time rather than runtime

#7599 opened 7 years ago by josharian

method definitions based on later-defined methods don't compile (pathological)NeedsFix

#7495 opened 7 years ago by griesemer

improve compiler error message when accessing type instead of instance of type

#6814 opened 7 years ago by btracey

support for explicit alignment annotationsThinking

#6752 opened 7 years ago by gopherbot

skip slicebytetostring when argument doesn't escapeGarbageCollectorPerformance

#6714 opened 7 years ago by bradfitz

use less memory for large []byte literalNeedsFixToolSpeedhelp wanted

#6643 opened 7 years ago by rsc

internal compiler error with self-referential method in interface

#6638 opened 7 years ago by griesemer

spurious error for recursive anonymous interface type

#6601 opened 7 years ago by adonovan

odd/inconsistent behavior with cyclic declarations

#6590 opened 7 years ago by griesemer

8MB error message for one char error

#6589 opened 7 years ago by griesemer

poor performance when accessing slices for numerical work (multiplying vectors)Performance

#6206 opened 7 years ago by gopherbot

missed escape analysis opportunity

#5919 opened 8 years ago by edsrzf

emits unnecessary deferreturnPerformance

#5712 opened 8 years ago by dvyukov

compile dense, pure-integer "switch" into jump tablePerformance

#5496 opened 8 years ago by cloneable

avoid closure for captured dynamic constant

#5370 opened 8 years ago by lexprfuncall

too many errors stops too early -- check other related errorsNeedsInvestigation

#5142 opened 8 years ago by btracey

more clever syntax error reporting

#5129 opened 8 years ago by btracey

init loop does not trace through inlined functions

#4758 opened 8 years ago by rsc

omit zeroing of named return value when possible

#4750 opened 8 years ago by rsc

error message for bad case in switch should suggest selectThinking

#4697 opened 8 years ago by adg

which errors are confusing?Suggested

#4566 opened 8 years ago by rsc

possible error message improvement

#4565 opened 8 years ago by rsc

eliminate duplicate instrumentation in racewalkPerformanceRaceDetector

#4247 opened 8 years ago by dvyukov

output variable names in data race reportsRaceDetector

#4246 opened 8 years ago by dvyukov

diagnose unused variable even in closureNeedsFixearly-in-cycle

#3059 opened 9 years ago by rogpeppe

why are stack frames so large?Performancehelp wanted

#2734 opened 9 years ago by rsc

static init maps should never generate codeNeedsInvestigationPerformancebinary-size

#2559 opened 9 years ago by rsc

emit info about used types in local types section of export data, for checking by ld.

#2474 opened 9 years ago by rsc

include registerization info for gdb

#2430 opened 9 years ago by ianlancetaylor

read-only escape analysis and avoiding string <-> []byte copiesGarbageCollectorNeedsFixPerformance

#2205 opened 9 years ago by bradfitz

infinite recursion generating symbol for recursive type

#1909 opened 10 years ago by gopherbot

1.3MB program takes 290MB of memory to compilePerformance

#1860 opened 10 years ago by davecheney