cmd/compile

failures with "symbol type.[…] listed multiple times" on freebsd-amd64-12_2 since 2021-11-24NeedsInvestigationOS-FreeBSDokay-after-beta1release-blocker

#49967 opened 1 day ago by bcmills

miss an optimization case for "struct{byte}"NeedsInvestigation

#49879 opened 4 days ago by go101

strange performance difference between two implementationsNeedsInvestigationPerformance

#49785 opened 1 week ago by go101

internal compiler error: bad type: chan struct { v [65536]byte }NeedsInvestigation

#49767 opened 1 week ago by burik666

better error messages from types2 (Go 1.18) for unexported fields/methodsokay-after-beta1

#49736 opened 1 week ago by danscales

defer wrapper has more instructions than hand-written wrapperNeedsDecision

#49656 opened 2 weeks ago by codefromthecrypt

no instruction marked with is_stmt in debug_line for statement calling generic function, inside a generic functionNeedsInvestigation

#49628 opened 2 weeks ago by aarzilli

type inference should look inside type parametersFeatureRequestNeedsDecisiongenerics

#49575 opened 3 weeks ago by griesemer

Go 1.18 compile time may be about 18% slower than Go.17 (largely from changes due to generics)NeedsInvestigationrelease-blocker

#49569 opened 3 weeks ago by danscales

misleading error message when struct lacks expected type parametersNeedsInvestigationgenerics

#49541 opened 3 weeks ago by rogpeppe

build failure with unified IR ("no field or method")NeedsFix

#49536 opened 3 weeks ago by mdempsky

parser doesn't recognize valid type parameter listNeedsFix

#49482 opened 3 weeks ago by griesemer

introduce growbyteslice?NeedsInvestigation

#49480 opened 3 weeks ago by quasilyte

internal compiler error: Op...LECall and OpDereference have mismatched mem [1.17 backport]CherryPickApproved

#49413 opened 4 weeks ago by gopherbot

internal compiler error: Op...LECall and OpDereference have mismatched mem [1.16 backport]CherryPickApproved

#49412 opened 4 weeks ago by gopherbot

clarify whether "-l" and "-N" compiler flags are actually supportedProposal

#49390 opened 4 weeks ago by bcmills

mark CSE'd loads as rematerializableNeedsInvestigationPerformance

#49332 opened 1 month ago by josharian

reorganize associative computation to allow superscalar executionNeedsInvestigationPerformance

#49331 opened 1 month ago by josharian

frequent memory corruption on NetBSD and OpenBSD since 2021-10-11NeedsInvestigationOS-NetBSDokay-after-beta1release-blocker

#49209 opened 1 month ago by bcmills

update interface been used as constraint error message.NeedsInvestigation

#49205 opened 1 month ago by komuw

initialization order within a file appears to have changedNeedsInvestigation

#49150 opened 1 month ago by cosnicolaou

Get rid of redundant TEST instructions by using the ZF flag of DEC/INCNeedsInvestigationPerformance

#49113 opened 1 month ago by jake-ciolek

puzzling "does not satisfy comparable" error messageNeedsInvestigationokay-after-beta1release-blocker

#49112 opened 1 month ago by ALTree

fuzzing triggers various crashes or internal compiler errors on tipNeedsFix

#49019 opened 1 month ago by thepudds

inefficient assembly code generated by simple loop&branch codeNeedsFixPerformance

#48882 opened 1 month ago by flypig

generic function argument causes escape to heapNeedsInvestigationPerformancegenerics

#48849 opened 1 month ago by bboreham

optimize print call sequencesNeedsInvestigationPerformanceSuggested

#48828 opened 1 month ago by josharian

open code unsafe.SliceNeedsInvestigationPerformance

#48798 opened 2 months ago by josharian

utf8.EncodeRune has different performance from the equivalent string conversionNeedsInvestigationPerformance

#48684 opened 2 months ago by bcmills

worse performance looping through arrays identifiable at compile timeNeedsInvestigationPerformance

#48637 opened 2 months ago by seebs

assignment error messagesNeedsInvestigation

#48585 opened 2 months ago by griesemer

bad line number assigned to instruction loading value into argument registerNeedsFix

#48546 opened 2 months ago by aarzilli

inline-able function with named results performs worseNeedsInvestigationPerformance

#48507 opened 2 months ago by go101

let cmd/compile choose how much concurrency to useNeedsInvestigationToolSpeed

#48497 opened 2 months ago by bcmills

add reverse proof to prove pass?NeedsDecision

#48469 opened 2 months ago by JAicewizard

DWARF Incorrect slice lenNeedsInvestigation

#48405 opened 2 months ago by mahdi-hm

avoid repeated write barrier checksNeedsInvestigationPerformance

#48245 opened 2 months ago by CAFxX

Load optimization suboptimalNeedsInvestigationPerformance

#48222 opened 2 months ago by klauspost

cannot elim binary search typeHash on a type switch for a known typeNeedsInvestigationPerformance

#48220 opened 2 months ago by wdvxdr1123

unnecessary shift-check NeedsInvestigationPerformance

#48213 opened 2 months ago by JAicewizard

add VBIC, VMVN instructions for ARMv8NeedsInvestigationarch-arm64

#48199 opened 3 months ago by ericlagergren

"UNREVIEWED" headers scattered around the treeNeedsFixrelease-blocker

#48194 opened 3 months ago by josharian

inline functions with only an error wrapperNeedsInvestigationPerformance

#48192 opened 3 months ago by dsnet

Not printing value before (not object bound directly) produces wildly different behaviour (and assembly)WaitingForInfo

#48041 opened 3 months ago by cristeigabriel

reduce binary space used for register spillingNeedsInvestigationbinary-size

#47970 opened 3 months ago by martisch

shorter slicing instruction sequence on x86/amd64NeedsInvestigationPerformancebinary-size

#47969 opened 3 months ago by martisch

deduplicate alg and noalg type descriptors to allow binary space optimizationsNeedsDecisionbinary-size

#47904 opened 3 months ago by martisch

can not compile large functionNeedsInvestigation

#47866 opened 3 months ago by mattn

DWARF Incorrect location listNeedsInvestigation

#47850 opened 3 months ago by mahdi-hm

set the proper export version number before Go 1.18NeedsFix

#47654 opened 3 months ago by danscales

local type declarations in generic code don't workNeedsFixgenericsrelease-blocker

#47631 opened 3 months ago by randall77

escape analysis reports that make() is using a non-constant size after inlining with a constant sizeNeedsInvestigationPerformance

#47524 opened 4 months ago by renthraysk

optimize append([]byte(string), ...) to avoid a duplicationNeedsInvestigationPerformance

#47454 opened 4 months ago by go101

wrong line number generated after function callNeedsInvestigation

#47260 opened 4 months ago by polinasok

large slice literals allocated in stack, causing very big frameNeedsFix

#47197 opened 4 months ago by go101

tight code optimization opportunitiesNeedsInvestigationPerformance

#47120 opened 4 months ago by rsc

eliminate redundant zeroing after lower passNeedsInvestigationPerformance

#47107 opened 4 months ago by tdakkota

rename 'imported and not used' error to 'imported but not used'NeedsFixhelp wanted

#47089 opened 5 months ago by gazerro

unclear error message on initialization loop and invalid parameter typeNeedsFix

#47059 opened 5 months ago by gazerro

typeparams: should //go:nointerface methods satisfy type parameter constraints?NeedsDecision

#47045 opened 5 months ago by mdempsky

missed phi elim opportunity using result of function callFeatureRequestNeedsInvestigationToolSpeed

#47023 opened 5 months ago by josharian

inappropriate suggested token in case of syntax error in "if" statementNeedsInvestigation

#47013 opened 5 months ago by gazerro

memory corruption from `//go:notinheap` interface method wrappersNeedsFix

#46903 opened 5 months ago by mdempsky

set up stack on ppc64/ppc64le to more closely match the PPC64 ABINeedsInvestigation

#46850 opened 5 months ago by laboger

replace `//go:notinheap` with runtime/internal/sys.NotInHeapProposalProposal-AcceptedProposal-FinalCommentPeriod

#46731 opened 5 months ago by mdempsky

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

#46711 opened 5 months ago by JAicewizard

no debug information emitted for type used only as initializerNeedsInvestigation

#46670 opened 5 months ago by heschi

explore optimizations for fixed-length array copiesNeedsInvestigationPerformance

#46529 opened 6 months ago by mdempsky

MTFT benchmark performance regression with register ABINeedsInvestigationPerformance

#46216 opened 6 months ago by dr2chase

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

#46135 opened 6 months ago by bcmills

allocate slices lazilyNeedsInvestigationPerformance

#46114 opened 6 months ago by bemasc

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

#46079 opened 6 months ago by go101

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

#46074 opened 6 months ago by mdempsky

optimize program running speed NeedsInvestigation

#46030 opened 7 months ago by aimuz

unneccesary 0 check in divisionNeedsInvestigationPerformance

#45928 opened 7 months ago by JAicewizard

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

#45925 opened 7 months ago by laboger

export format of untyped constants is unnecessarily restrictedNeedsFix

#45837 opened 7 months ago by griesemer

DWARF IsStmt flag not set for line although it is executedDebuggingNeedsInvestigation

#45680 opened 7 months ago by mahdi-hm

unnecessary slice literal zeroingNeedsFixPerformance

#45573 opened 7 months ago by icholy

GOEXPERIMENT to add two non-pointer words to iface/efaceNeedsInvestigationhelp wanted

#45494 opened 7 months ago by zephyrtronium

emitted DWARF location for complex128 param is incorrectNeedsInvestigation

#45281 opened 8 months ago by thanm

inaccurate escape to heap messageNeedsInvestigation

#45269 opened 8 months ago by go101

bounds check not eliminatedNeedsFix

#45078 opened 8 months ago by rsc

map lookup with result of inlined method cannot use fast pathNeedsDecisionPerformance

#44898 opened 9 months ago by rogpeppe

pass pointer-shaped receivers using context registerNeedsDecisionPerformancebinary-size

#44827 opened 9 months ago by mdempsky

match Aux/AuxInt more strictly in rewriting rulesNeedsDecision

#44824 opened 9 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 9 months ago by bcmills

register ABI bringup testcase failures (tracking issue)

#44816 opened 9 months ago by thanm

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

#44671 opened 9 months ago by josharian

unnecessary copy in regallocNeedsInvestigationPerformance

#44670 opened 9 months ago by josharian

avoid unnecessary allocations for consecutive appendsNeedsInvestigationPerformance

#44628 opened 9 months ago by rogpeppe

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

#44623 opened 9 months ago by mdempsky

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

#44583 opened 9 months ago by bcmills

optimize maps with bool keysNeedsInvestigationPerformance

#44578 opened 9 months ago by go101

ppc64 ISA 3.1 supportNeedsInvestigationarch-ppc64x

#44549 opened 9 months ago by pmur

imperfect compile error messageNeedsInvestigation

#44321 opened 9 months ago by go101

recommend fix when "method has pointer receiver"NeedsDecision

#44201 opened 9 months ago by kstenerud

consider increasing the internal precision limit for integer valuesNeedsDecision

#44057 opened 10 months ago by griesemer

possible miscompilation comparing interface to concrete valueNeedsInvestigation

#44051 opened 10 months ago by josharian

builders are unhappy with dev.typeparamsNeedsInvestigation

#43866 opened 10 months ago by mdempsky

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

#43826 opened 10 months ago by bcmills

avoidable construction of stack objectsFeatureRequestNeedsFix

#43753 opened 10 months ago by mdempsky

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

#43752 opened 10 months ago by mdempsky

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

#43673 opened 10 months ago by mprobst

better optimization/inlining for sort.SearchFeatureRequestNeedsFixPerformance

#43423 opened 11 months ago by yangwenmai

constant indexing to private array should be foldedNeedsFixPerformance

#43403 opened 11 months ago by egonelbre

inefficient assembly code on arm64NeedsInvestigationPerformancearch-arm64

#43357 opened 11 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 11 months ago by odeke-em

missed opportunity to coalesce loads that compare with constantsNeedsInvestigationPerformance

#43248 opened 11 months ago by josharian

suboptimal arm64 outputNeedsDecisionPerformancearch-arm64

#43145 opened 11 months ago by FiloSottile

big map literal creation performanceNeedsInvestigationPerformance

#43020 opened 1 year ago by trams

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

#43007 opened 1 year ago by dvyukov

inlined err check elimination opportunityNeedsInvestigationPerformance

#42999 opened 1 year ago by egonelbre

-race does not obey go:nocheckptrNeedsInvestigation

#42880 opened 1 year ago by chewxy

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

#42841 opened 1 year ago by raspi

function argument value escapes no matter the run-time conditionNeedsInvestigation

#42781 opened 1 year ago by Julio-Guerra

nil check not scheduled correctlyNeedsInvestigation

#42673 opened 1 year ago by randall77

missed add+load combination opportunityNeedsInvestigationPerformance

#42672 opened 1 year ago by randall77

notice when function variables are never reassigned, avoid indirect callsNeedsInvestigationPerformance

#42569 opened 1 year ago by bradfitz

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

#42517 opened 1 year ago by vext01

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

#42416 opened 1 year ago by odeke-em

go:wasmexport directiveProposalProposal-Holdarch-wasm

#42372 opened 1 year ago by slinkydeveloper

unneeded panicshift for bounded shift amountNeedsInvestigationPerformance

#42179 opened 1 year ago by CAFxX

escape analysis for backing arraysNeedsInvestigation

#42165 opened 1 year ago by snadrus

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

#42162 opened 1 year ago by zhangfannie

implicit allocations allowed in the runtimeFeatureRequestNeedsInvestigation

#42158 opened 1 year ago by randall77

inconsistent error message when identifier begins with invalid characterNeedsInvestigation

#42114 opened 1 year ago by smasher164

negative shift check with trailing zerosNeedsInvestigationPerformance

#42094 opened 1 year ago by niaow

not inlined closures can't inline inner closuresNeedsInvestigationPerformance

#41988 opened 1 year ago by DmitriyMV

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

#41776 opened 1 year ago by josharian

introduce masked memeqNeedsInvestigationPerformance

#41774 opened 1 year ago by josharian

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

#41770 opened 1 year ago by zhsj

checking pointers for nilness inside a loopNeedsInvestigationPerformance

#41666 opened 1 year ago by seebs

missing BCE case NeedsInvestigation

#41335 opened 1 year ago by choleraehyq

rewrite sequences of mutex callsNeedsInvestigation

#41253 opened 1 year ago by CAFxX

optimize redundant iface->iface type assertionsNeedsInvestigationPerformance

#41174 opened 1 year ago by quasilyte

don't compile some unexported, inlined functionsNeedsInvestigationToolSpeedhelp wanted

#41117 opened 1 year ago by josharian

some missing BCE casesNeedsInvestigationPerformance

#40987 opened 1 year ago by go101

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

#40724 opened 1 year ago by aclements

259

loops prevent bounds checking eliminationNeedsInvestigationPerformance

#40704 opened 1 year ago by elichai

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

#40639 opened 1 year ago by seebs

combine phielim and copyelim into a single pass?NeedsInvestigation

#40610 opened 1 year ago by surechen

better error message for type arguments used with unsatisfiable constraints (empty type sets)NeedsFix

#40350 opened 1 year ago by komuw

unnecessary nil pointer checkNeedsInvestigationPerformance

#40108 opened 1 year ago by randall77

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

#40084 opened 1 year ago by randall77

teach prove about arguments of & expressionsNeedsInvestigationPerformance

#40083 opened 1 year ago by randall77

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

#40039 opened 1 year ago by thepudds

create cheapdeadcodeNeedsInvestigationPerformanceToolSpeed

#39918 opened 1 year ago by josharian

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

#39816 opened 1 year ago by seasox

unnecessary bounds check in a loop passed as a closureNeedsInvestigationPerformance

#39756 opened 1 year ago by jordanlewis

optimize xor to complementNeedsInvestigationPerformance

#39710 opened 1 year ago by niaow

inaccurate DWARF location information -> misleading profile

#39667 opened 1 year ago by alandonovan

Allocations leak into outer scopeNeedsInvestigation

#39514 opened 2 years ago by holiman

intrinsify bits.RotateLeft32 on mipsleNeedsInvestigationPerformance

#39139 opened 2 years ago by assadobaid

generated DWARF triggers objdump warning for large uint64 constNeedsInvestigation

#39048 opened 2 years ago by thanm

inconsistent results with gccgoNeedsDecision

#39003 opened 2 years ago by go101

Missed opportunity for post-inlining devirtualizationNeedsInvestigationPerformance

#38992 opened 2 years 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 2 years ago by odeke-em

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

#38893 opened 2 years ago by ianlancetaylor

incorrect type error after "type int64 int32"NeedsInvestigation

#38882 opened 2 years ago by JohnReedLOL

more compact initialization of maps with dynamic contentNeedsInvestigationbinary-size

#38784 opened 2 years ago by martisch

binaries contain many ..type.eq funcsNeedsInvestigationbinary-size

#38782 opened 2 years ago by bradfitz

arch.MAXWIDTH on amd64 out of date?NeedsInvestigation

#38734 opened 2 years ago by mdempsky

experiment with more integer comparison optimizationsPerformance

#38721 opened 2 years ago by mundaym

prove bounds for & of positive valuesNeedsInvestigation

#38717 opened 2 years ago by bmkessler

unify and improve struct/array equality comparisonsNeedsInvestigationPerformancehelp wanted

#38674 opened 2 years ago by josharian

bugs in mips rulesNeedsInvestigation

#38648 opened 2 years ago by randall77

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

#38624 opened 2 years ago by mzimmerman

optimize bits.OnesCount(x) == 1NeedsInvestigationPerformance

#38547 opened 2 years ago by josharian

improve inline memrun decision in generated alg eq routinesNeedsInvestigationPerformancehelp wanted

#38494 opened 2 years ago by josharian

Eliminate bound checks on access to positive moduloNeedsInvestigationPerformance

#38476 opened 2 years ago by cbeuw

allow inlining of open-coded defer callsNeedsInvestigationPerformance

#38471 opened 2 years ago by prattmic

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

#38419 opened 2 years ago by qmuntal

anonymous structs consume space in binaryNeedsInvestigationbinary-size

#38291 opened 2 years ago by egonelbre

replace CallImport with go:wasmimport directiveProposalProposal-Accepted

#38248 opened 2 years ago by neelance

consider extending '-spectre' option to other architecturesNeedsInvestigationSecurity

#38066 opened 2 years ago by mundaym

user symbols can be in reserved namespaceNeedsFixearly-in-cycle

#37762 opened 2 years ago by Pr0Ger

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

#37753 opened 2 years ago by kortschak

avoid unnecessary calls to runtime.panicIndexNeedsInvestigationPerformance

#37740 opened 2 years ago by rillig

delete insertLoopReschedChecks?NeedsDecision

#37737 opened 2 years ago by josharian

inlined messaging is unclear when inlining functions from other packagesNeedsInvestigation

#37704 opened 2 years ago by snadrus

better append of unmodified slicesNeedsInvestigationPerformance

#37694 opened 2 years ago by sylr

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

#37620 opened 2 years ago by kokizzu

use staticuint64sNeedsFixPerformanceSuggestedhelp wanted

#37612 opened 2 years ago by josharian

branch elimination opportunites when comparing constantsNeedsInvestigationPerformance

#37608 opened 2 years ago by laboger

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

#37600 opened 2 years ago by bcmills

a flaw in algebraic simplification rules inside Go compilerNeedsInvestigationPerformance

#37508 opened 2 years ago by true-grue

investigate performance regression vs Go 1.13NeedsInvestigationPerformance

#37429 opened 2 years ago by dr2chase

add a way to declare variables in rewrite rulesNeedsInvestigation

#37423 opened 2 years ago by josharian

partial cse of phi inputs?NeedsInvestigationPerformance

#37415 opened 2 years ago by josharian

optimize small runtime.memequal callsNeedsFixPerformance

#37275 opened 2 years ago by josharian

combine int tests when comparing against a constant stringNeedsFixPerformance

#37274 opened 2 years ago by josharian

error has incorrect column numberNeedsInvestigation

#37180 opened 2 years ago by quackenbush

ARM's MOVWnop causes regalloc to insert unnecessary copiesNeedsInvestigationPerformance

#37096 opened 2 years ago by josharian

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

#36988 opened 2 years ago by jkassis

it is not possible to prevent FMA with complex valuesNeedsInvestigation

#36971 opened 2 years ago by kortschak

escape analysis on interface callsNeedsInvestigationPerformance

#36964 opened 2 years ago by kirillx

possible latent codegen issue on amd64 removing zero extensionsNeedsInvestigation

#36897 opened 2 years ago by josharian

prove misses obvious facts about constantsNeedsInvestigationPerformance

#36889 opened 2 years ago by josharian

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

#36850 opened 2 years ago by icza

set prologue_end on every archDebuggingNeedsDecision

#36612 opened 2 years ago by derekparker

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

#36606 opened 2 years ago by danscales

decide how to better document -wb write barrier flagDocumentationNeedsDecision

#36597 opened 2 years ago by xaionaro

different behaviors between short and normal variable declarationsNeedsInvestigation

#36449 opened 2 years ago by go101

manually CSE |-combined rules?NeedsInvestigation

#36443 opened 2 years ago by josharian

optimize overhead from CPU feature detectionNeedsInvestigationPerformance

#36351 opened 2 years ago by smasher164

teach prove about incrementing, len, and overflowNeedsInvestigationPerformance

#36346 opened 2 years 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

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

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

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

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 inliningNeedsInvestigationPerformancearch-wasm

#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

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 3 years ago by mmcloughlin

use bit tests for binary search in type switchesPerformance

#29292 opened 3 years ago by josharian

improve interface dispatch performancePerformance

#29276 opened 3 years ago by robaho

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

#29166 opened 3 years ago by notimesea

compiler hangs without optimizationsNeedsInvestigationToolSpeed

#29144 opened 3 years ago by csnitker

better const-based optimizations handling in compiler frontendPerformance

#29095 opened 3 years ago by quasilyte

specialize variadic functionsPerformance

#29085 opened 3 years ago by josharian

statictmps can prevent heap objects from being collectedGarbageCollector

#29068 opened 3 years ago by randall77

minimize morestack calls text footprintNeedsInvestigation

#29067 opened 3 years ago by CAFxX

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

#28969 opened 3 years ago by tjamet

consider teaching prove about unexported integer fieldsPerformance

#28952 opened 3 years ago by mvdan

BCE is better with reslicing than index variablesPerformance

#28942 opened 3 years ago by mvdan

teach prove about slice expressionsPerformance

#28941 opened 3 years ago by mvdan

fuse constant comparison with division by a constantPerformance

#28861 opened 3 years ago by benshi001

refine calcHasCall's handling of ODIV and OMODNeedsFixSuggested

#28698 opened 3 years ago by josharian

various low level x86 instruction generation improvementsNeedsInvestigationPerformanceSuggestedhelp wanted

#28671 opened 3 years ago by martisch

reduce generated algs for compiler created array typesNeedsInvestigationPerformance

#28639 opened 3 years ago by martisch

thread support for webassemblyFeatureRequestNeedsDecisionarch-wasm

#28631 opened 3 years ago by sleagon

liveness analysis conservative for compound objectsGarbageCollector

#28626 opened 3 years ago by randall77

can't break on inlined functionNeedsInvestigation

#28603 opened 3 years ago by aclements

cleanup compiler flag processingNeedsFixSuggested

#28570 opened 3 years ago by griesemer

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

#28416 opened 3 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 3 years ago by deanveloper

recognize rand.Intn() is bounded for BCEPerformance

#28314 opened 3 years ago by marigonzes

"invalid recursive type" should abortNeedsInvestigation

#28294 opened 3 years ago by bep

feedback-guided optimizationNeedsInvestigationPerformanceumbrella

#28262 opened 3 years ago by josharian

add column info to export dataNeedsFix

#28259 opened 3 years ago by alandonovan

clearer error message for unkeyed composite literal with unexported fieldNeedsFixhelp wanted

#28053 opened 3 years ago by pjebs

optimize field access after type assertionPerformance

#28045 opened 3 years ago by rillig

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

#27912 opened 3 years ago by willfaught

unexpected performance difference accessing slices with different capsNeedsFixPerformance

#27857 opened 3 years ago by iand

string concatenation specializations for performanceNeedsInvestigationPerformance

#27801 opened 3 years ago by quasilyte

detect and apply more CMOV optimizationsNeedsInvestigationPerformance

#27780 opened 3 years ago by agnivade

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

#27625 opened 3 years ago by rasky

BCE optimizes less for string than sliceNeedsInvestigationPerformance

#27585 opened 3 years ago by go101

eliminate unnecessary extend-of-truncate calculations in prove passNeedsInvestigationPerformance

#27572 opened 3 years ago by josharian

pointers passed to cgo escape to the heapNeedsInvestigation

#27538 opened 3 years ago by FiloSottile

autotemps can make stack frame too largeNeedsFix

#27447 opened 3 years ago by randall77

internal compiler error: name too longNeedsInvestigation

#27256 opened 3 years ago by elagergren-spideroak

mipsle: running error SIGILL: illegal instructionNeedsInvestigation

#27236 opened 3 years ago by wumao

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

#27228 opened 3 years ago by mooneyr

understand Go vs assembly rc4 resultsNeedsInvestigationPerformance

#27184 opened 3 years ago by bradfitz

rename a bunch of things

#27167 opened 3 years ago by josharian

optimise ranges over string(byteSlice)NeedsInvestigationPerformance

#27148 opened 3 years ago by mvdan

Fannkuch benchmark performance regressionNeedsInvestigationPerformance

#27108 opened 3 years ago by kklobe

split up SSA rewrite passes

#27034 opened 3 years ago by mundaym

provide parameter escape information in DWARFDebugging

#27007 opened 3 years ago by heschi

recognize map-copy with range idiomNeedsInvestigationPerformance

#26951 opened 3 years ago by martisch

pack info into low bits of interface type pointersNeedsDecisionPerformance

#26680 opened 3 years ago by josharian

optimise away deferred calls to empty functionsNeedsFixPerformancehelp wanted

#26534 opened 3 years ago by ainar-g

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

#26498 opened 3 years ago by FMNSSun

consider using DWARF 5DebuggingNeedsDecision

#26379 opened 3 years ago by aclements

internal prefix paths leaking into generated DWARFDebuggingNeedsFix

#26311 opened 3 years ago by thanm

teach prove about more type conversion operationsNeedsInvestigationPerformance

#26299 opened 3 years ago by mvdan

debug info for inlined funcs are sometimes lostDebuggingNeedsInvestigation

#26206 opened 3 years ago by hyangah

msan cannot handle structs with paddingNeedsInvestigation

#26167 opened 3 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 codeNeedsFixPerformancebinary-size

#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 argsPerformancebinary-size

#23377 opened 3 years ago by ALTree

validity of program depends on method declaration order

#23202 opened 4 years ago by griesemer

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

#23065 opened 4 years ago by cramertj

slicing can be improved on ARMPerformance

#23006 opened 4 years ago by rasky

eliminate runtime.conv* calls with unused resultsNeedsFixPerformancebinary-size

#22971 opened 4 years ago by pavel

implement powerpc 32-bit backend (ppc32)FeatureRequest

#22885 opened 4 years ago by rasky

cannot compile valid (but esoteric) self-recursive interface

#22825 opened 4 years ago by griesemer

reordering struct field accesses can alter performanceNeedsInvestigationPerformance

#22479 opened 4 years ago by mvdan

escape analysis loopdepth should reset when blocks endNeedsInvestigation

#22438 opened 4 years ago by mdempsky

generate correct DW_AT_external flagDebuggingNeedsFix

#22399 opened 4 years ago by thanm

odd inlining heuristic under mid-stack inliningNeedsInvestigationPerformance

#22310 opened 4 years ago by mdempsky

regression in TestIntendedInlining on ppc64x, othersNeedsInvestigation

#22239 opened 4 years ago by laboger

consider adding sibling links to generated DWARFDebuggingNeedsInvestigation

#22185 opened 4 years ago by thanm

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

#22167 opened 4 years ago by rsc

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

#22094 opened 4 years ago by crawshaw

avoid allocations for some return valuesNeedsInvestigationPerformance

#22081 opened 4 years ago by crawshaw

redundant branchPerformance

#22025 opened 4 years ago by randall77

don't depend on statictmp_ variables being read onlyNeedsFix

#21940 opened 4 years ago by randall77

cleaner solution for exporting linkname infoearly-in-cycle

#21936 opened 4 years ago by mdempsky

constant folding math/bits functionsPerformanceSuggestedhelp wanted

#21872 opened 4 years ago by markus-oberhumer

errors involving aliased types should use the alias nameNeedsFix

#21866 opened 4 years ago by bcmills

failure to reject initialization loopNeedsFix

#21752 opened 4 years ago by mdempsky

obscure initialization loop error message due to inliningNeedsFix

#21750 opened 4 years ago by dvyukov

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

#21735 opened 4 years ago by martisch

optimize away some MOVQconvertsPerformance

#21572 opened 4 years ago by josharian

optimize unsigned comparisons with zero/onePerformanceSuggestedhelp wanted

#21439 opened 4 years ago by josharian

coalesce consecutive calls to print/printlnNeedsDecisionPerformance

#21417 opened 4 years ago by josharian

improve codegen for nested if statementsPerformance

#21394 opened 4 years ago by josharian

gdb 8 on windows crashes reading Go binaryNeedsInvestigationOS-Windows

#21380 opened 4 years ago by kjk

add and use go:nosplitrec compilation directiveNeedsFix

#21314 opened 4 years ago by ianlancetaylor

incorrect type assertions on conflicting package namesNeedsFix

#21282 opened 4 years ago by dsnet

late nilcheck elim doesn't elim later nilcheck

#20962 opened 4 years ago by josharian

CSE some function calls args/resultsPerformanceToolSpeed

#20934 opened 4 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

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 5 years ago by bradfitz

some local variables are missing from DWARFDebugging

#18247 opened 5 years ago by alandonovan

improve map iterationPerformance

#18004 opened 5 years ago by cherrymui

insertVarPhis is very slowToolSpeed

#17926 opened 5 years ago by dvyukov

elide branches that must be takenPerformance

#17862 opened 5 years ago by dsnet

implement duffcopy on ppc64xNeedsDecisionPerformance

#17842 opened 5 years ago by bradfitz

merge order/walk/instrument into buildssaToolSpeed

#17728 opened 5 years ago by mdempsky

remove all pointers from type information

#17724 opened 5 years ago by crawshaw

use better code for slicingPerformance

#17638 opened 5 years ago by randall77

optimize functions into boolean expressionsPerformance

#17622 opened 5 years ago by dsnet

improve inlining cost modelNeedsInvestigationPerformanceToolSpeed

#17566 opened 5 years ago by josharian

-bench should correct for GCNeedsFix

#17434 opened 5 years ago by mdempsky

large arrays cause large binaries and toolchain errorsNeedsDecision

#17378 opened 5 years ago by crawshaw

eliminate more bounds checksPerformance

#17370 opened 5 years ago by carl-mastrangelo

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

#17314 opened 5 years ago by dAdAbird

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

#17220 opened 5 years ago by nigeltao

elimination of unused runtime callsPerformancebinary-size

#17216 opened 5 years ago by DmitriyMV

optimizing multiple accesses to same key in mapNeedsFixPerformance

#17133 opened 5 years ago by rasky

avoid reloads of temp register on ppc64le, othersNeedsFixPerformance

#17110 opened 5 years ago by laboger

combine contiguous multi-byte comparisons to a constantPerformance

#17106 opened 5 years ago by josharian

reuse algs for [N]T arraysbinary-size

#17031 opened 5 years ago by mdempsky

make algs content-addressablebinary-size

#17029 opened 5 years ago by josharian

detect call trees that can be marked NOSPLITPerformance

#17023 opened 5 years ago by josharian

use common ancestor blocks in CSE?Performance

#16973 opened 5 years ago by josharian

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

#16929 opened 5 years ago by mdempsky

inline reflect.TypeOf (or make it intrinsic)Performance

#16869 opened 5 years ago by bradfitz

teach BCE about copy return valuePerformance

#16833 opened 5 years ago by josharian

should recognize binary package and intrinsify it where possiblePerformance

#16832 opened 5 years ago by dr2chase

make SSA IDs stable across passesNeedsFix

#16754 opened 5 years ago by bradfitz

move SSA boolean optimizations to generic level

#16747 opened 5 years ago by josharian

print better error message when assigning to keywords

#16521 opened 5 years ago by dsnet

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

#16416 opened 5 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

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

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.Performancebinary-size

#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 6 years ago by dr2chase

storing pointer of a local value escapesPerformance

#13493 opened 6 years ago by dsnet

Suggest typo fixes for resolution errorsNeedsInvestigation

#13477 opened 6 years ago by Manishearth

performance issue with ranging over stringPerformance

#13162 opened 6 years ago by mpvl

turn nilcheckelim into branchelimNeedsFixPerformance

#12628 opened 6 years ago by josharian

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

#12399 opened 6 years ago by doherty

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

#10936 opened 6 years ago by dr2chase

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 7 years ago by tildeleb

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

#8983 opened 7 years ago by gopherbot

optimisations change the behaviour of *struct{}

#8938 opened 7 years ago by ainar-g

recognize case <-time.After(x)Performance

#8895 opened 7 years ago by dvyukov

confusing error messages when a type is repeatedSuggested

#8853 opened 7 years ago by btracey

merge temporaries more aggressivelyNeedsFixPerformance

#8740 opened 7 years ago by josharian

random performance fluctuations after unrelated changesNeedsFixPerformance

#8717 opened 7 years ago by dvyukov

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

#8659 opened 7 years ago by btracey

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

#8481 opened 7 years ago by augustoroman

Wrong type reported for constant in type mismatch report

#8409 opened 7 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 symbolbinary-size

#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 8 years ago by btracey

support for explicit alignment annotationsThinking

#6752 opened 8 years ago by gopherbot

skip slicebytetostring when argument doesn't escapeGarbageCollectorPerformance

#6714 opened 8 years ago by bradfitz

use less memory for large []byte literalNeedsFixToolSpeedhelp wanted

#6643 opened 8 years ago by rsc

internal compiler error with self-referential method in interface

#6638 opened 8 years ago by griesemer

spurious error for recursive anonymous interface type

#6601 opened 8 years ago by adonovan

odd/inconsistent behavior with cyclic declarations

#6590 opened 8 years ago by griesemer

8MB error message for one char error

#6589 opened 8 years ago by griesemer

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

#6206 opened 8 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 9 years ago by rsc

possible error message improvement

#4565 opened 9 years ago by rsc

eliminate duplicate instrumentation in racewalkPerformanceRaceDetector

#4247 opened 9 years ago by dvyukov

output variable names in data race reportsRaceDetector

#4246 opened 9 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 10 years ago by rsc

static init maps should never generate codeNeedsInvestigationPerformancebinary-size

#2559 opened 10 years ago by rsc

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

#2474 opened 10 years ago by rsc

include registerization info for gdb

#2430 opened 10 years ago by ianlancetaylor

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

#2205 opened 10 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