cmd/compile

New Issue

internal compiler error: append outside assignmentNeedsInvestigation

#31010 opened 2 days ago by anacrolix

struct interface{} value lost passing by valueCherryPickCandidateNeedsFix

#30956 opened 5 days ago by benjaminp

Runtime check for availability of popcount is spammyPerformance

#30946 opened 5 days ago by seebs

bounds checking for unrolled loops is weirdPerformance

#30945 opened 5 days ago by seebs

empty variadic function causes argument to escapePerformance

#30898 opened 1 week ago by tsavola

give better error for composite literal parsing ambiguityNeedsInvestigationhelp wanted

#30867 opened 1 week ago by empijei

lay out global errors.New results in static dataPerformance

#30820 opened 1 week ago by rsc

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

#30818 opened 1 week ago by josharian

rewrite rulegen to not generate plaintext Go code directlyNeedsFix

#30810 opened 1 week ago by mvdan

add consistency check that local variables are associated with CurfnNeedsInvestigation

#30754 opened 1 week ago by mdempsky

internal compiler error: Func.initLSym called twiceNeedsInvestigation

#30709 opened 2 weeks ago by griesemer

write a test for #30167NeedsFixTesting

#30664 opened 2 weeks ago by mvdan

restore walkinrange optimization (by moving to SSA)NeedsFixPerformancerelease-blocker

#30645 opened 2 weeks ago by josharian

investigate wasm sync inliningArch-WasmPerformance

#30605 opened 2 weeks ago by bradfitz

provide flags to request just inlining or just escape analysis infoNeedsInvestigation

#30585 opened 2 weeks ago by josharian

teach prove about minNeedsFixPerformance

#30584 opened 2 weeks ago by josharian

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

#30548 opened 3 weeks ago by josharian

unnecessary bounds check for global slicesNeedsInvestigationPerformance

#30529 opened 3 weeks ago by dsnet

unnecessary hash/eq functions for global arraysNeedsInvestigationPerformance

#30528 opened 3 weeks ago by dsnet

elide call to runtime.growslice with provable capacity availabilityNeedsInvestigationPerformance

#30509 opened 3 weeks ago by dsnet

clean up recent fix for ginsop2 on ppc64xNeedsFix

#30475 opened 3 weeks ago by laboger

unnecessary hash/eq functions for slice literalsNeedsInvestigationToolSpeed

#30449 opened 3 weeks ago by neild

'_rt0_amd64_windows_lib' is not called when linking with VS2015NeedsInvestigation

#30347 opened 1 month ago by andreas-jonsson

Faster divisibility check for constantsNeedsInvestigationPerformance

#30282 opened 1 month ago by TuomLarsen

assembly generated is bigger than previous versionsNeedsInvestigationPerformance

#30229 opened 1 month ago by marigonzes

duplicate anonymous interface declarations cause non-determinismNeedsFixrelease-blocker

#30202 opened 1 month ago by jellevandenhooff

inconsistent error message for assignment mismatchNeedsFix

#30085 opened 1 month ago by smasher164

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

#30077 opened 1 month ago by udhos

add a README section on developing the compilerDocumentation

#30074 opened 1 month ago by mvdan

confusing error when using a keyword as package memberNeedsFix

#30039 opened 1 month ago by mvdan

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

#29977 opened 1 month ago by dlsniper

prove pass disabled on int32/int64NeedsInvestigationPerformance

#29964 opened 1 month ago by rsc

unnecessary bounds checkNeedsInvestigationPerformancehelp wanted

#29872 opened 2 months ago by marigonzes

redundant conditional jumpPerformance

#29853 opened 2 months ago by marigonzes

misleading panic on deferred funcNeedsInvestigation

#29797 opened 2 months ago by dsymonds

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

#29785 opened 2 months ago by valyala

relax recursive restriction while inliningPerformance

#29737 opened 2 months ago by randall77

optimize CAS loopsPerformance

#29716 opened 2 months ago by CAFxX

use memmove to initialize non-global static dataNeedsFixPerformance

#29693 opened 2 months ago by josharian

implement global new(T) without calling newobjectNeedsFixPerformance

#29691 opened 2 months ago by josharian

optimize repeated getg() callsPerformance

#29671 opened 2 months ago by CAFxX

panic on conversion to anonymous interface when 2 versions of library are builtNeedsInvestigationrelease-blocker

#29612 opened 2 months ago by jirfag

reuse boxed primitive in slice literals of interfacesPerformance

#29574 opened 2 months ago by dsnet

reduce binary bloat for slice literals of interfacesPerformance

#29573 opened 2 months ago by dsnet

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

#29571 opened 2 months ago by laboger

simplify converting a Go function to buildable Go assemblyNeedsDecision

#29538 opened 2 months ago by mvdan

missing inlined stack trace frame in index panic

#29504 opened 2 months ago by rsc

make argument size of -S output more accurateNeedsFix

#29334 opened 3 months ago by mmcloughlin

depth limit reached in type formatting routine

#29312 opened 3 months ago by griesemer

use bit tests for binary search in type switchesPerformance

#29292 opened 3 months ago by josharian

numberLines SSA pass does not handle inlining wellNeedsInvestigationToolSpeed

#29279 opened 3 months ago by josharian

improve interface dispatch performancePerformance

#29276 opened 3 months ago by robaho

internal compiler error: bad live variable at entry (part 2)NeedsFix

#29218 opened 3 months ago by ALTree

DCE before inlining does not remove dead `if`sNeedsInvestigationPerformance

#29189 opened 3 months ago by CAFxX

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

#29166 opened 3 months ago by notimesea

compiler hangs without optimizationsNeedsInvestigation

#29144 opened 3 months ago by csnitker

better const-based optimizations handling in compiler frontendPerformance

#29095 opened 3 months ago by quasilyte

specialize variadic functionsPerformance

#29085 opened 3 months ago by josharian

statictmps can prevent heap objects from being collectedGarbageCollector

#29068 opened 3 months ago by randall77

minimize morestack calls text footprintNeedsInvestigation

#29067 opened 3 months ago by CAFxX

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

#28969 opened 3 months ago by tjamet

prove/BCE don't seem affected by hints that signed integers are not negativeNeedsFixPerformance

#28956 opened 3 months ago by mvdan

consider teaching prove about unexported integer fieldsPerformance

#28952 opened 3 months ago by mvdan

BCE is better with reslicing than index variablesPerformance

#28942 opened 4 months ago by mvdan

teach prove about slice expressionsPerformance

#28941 opened 4 months ago by mvdan

Improve BCE when using positive int as slice indexNeedsInvestigationPerformance

#28885 opened 4 months ago by leitzler

fuse constant comparison with division by a constantPerformance

#28861 opened 4 months ago by benshi001

allocate func literal on stack if possibleNeedsInvestigationPerformance

#28727 opened 4 months ago by tdewolff

refine calcHasCall's handling of ODIV and OMODNeedsFixSuggested

#28698 opened 4 months ago by josharian

ppc64le broken by encourage inlining of functions with single-call bodiesNeedsFix

#28679 opened 4 months ago by bradfitz

various low level x86 instruction generation improvementsNeedsInvestigationPerformanceSuggestedhelp wanted

#28671 opened 4 months ago by martisch

reduce generated algs for compiler created array typesNeedsInvestigationPerformance

#28639 opened 4 months ago by martisch

thread support for webassemblyArch-WasmFeatureRequest

#28631 opened 4 months ago by sleagon

liveness analysis conservative for compound objectsGarbageCollector

#28626 opened 4 months ago by randall77

can't break on inlined functionNeedsInvestigation

#28603 opened 4 months ago by aclements

cleanup compiler flag processingNeedsFixSuggested

#28570 opened 4 months ago by griesemer

same global variable loaded twice for function call argumentNeedsInvestigationPerformancehelp wanted

#28484 opened 4 months ago by martisch

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

#28416 opened 5 months 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 5 months ago by deanveloper

unnecessary error messageNeedsFix

#28376 opened 5 months ago by go101

value converted to uintptr escapes to heapNeedsInvestigation

#28369 opened 5 months ago by ainar-g

recognize rand.Intn() is bounded for BCEPerformance

#28314 opened 5 months ago by marigonzes

"invalid recursive type" should abortNeedsInvestigation

#28294 opened 5 months ago by bep

feedback-guided optimizationPerformance

#28262 opened 5 months ago by josharian

add column info to export dataNeedsFix

#28259 opened 5 months ago by alandonovan

clearer error message for unkeyed composite literal with unexported fieldNeedsFixhelp wanted

#28053 opened 5 months ago by pjebs

optimize field access after type assertionPerformance

#28045 opened 5 months ago by rillig

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

#27912 opened 5 months ago by willfaught

unexpected performance difference accessing slices with different capsNeedsFixPerformance

#27857 opened 6 months ago by iand

string concatenation specializations for performanceNeedsInvestigationPerformance

#27801 opened 6 months ago by quasilyte

detect and apply more CMOV optimizationsNeedsInvestigationPerformance

#27780 opened 6 months ago by agnivade

out of memory compiling cmd/compile/internal/ssa with 1GB RAMNeedsInvestigation

#27739 opened 6 months ago by philhofer

extra (confusing) error message after shift errorNeedsInvestigation

#27712 opened 6 months ago by griesemer

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

#27625 opened 6 months ago by rasky

BCE optimizes less for string than sliceNeedsInvestigationPerformance

#27585 opened 6 months ago by go101

eliminate unnecessary extend-of-truncate calculations in prove passNeedsInvestigationPerformance

#27572 opened 6 months ago by josharian

method values cause receiver to escape to the heapNeedsInvestigation

#27557 opened 6 months ago by deepilla

pointers passed to cgo escape to the heapNeedsInvestigation

#27538 opened 6 months ago by FiloSottile

wasm code causes out of memory error on Chrome and Firefox for AndroidArch-WasmNeedsInvestigationPerformance

#27462 opened 6 months ago by termonio

autotemps can make stack frame too largeNeedsFix

#27447 opened 6 months ago by randall77

significant binary size increase in go1.11NeedsInvestigation

#27266 opened 7 months ago by warmchang

internal compiler error: name too longNeedsInvestigation

#27256 opened 7 months ago by elagergren-spideroak

mipsle: running error SIGILL: illegal instructionNeedsInvestigation

#27236 opened 7 months ago by wumao

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

#27228 opened 7 months ago by mooneyr

refactor access to Val values to use node methodsNeedsInvestigation

#27212 opened 7 months ago by martisch

unused variable escapes to the heapNeedsInvestigation

#27188 opened 7 months ago by marigonzes

understand Go vs assembly rc4 resultsNeedsInvestigationPerformance

#27184 opened 7 months ago by bradfitz

rename a bunch of things

#27167 opened 7 months ago by josharian

optimise ranges over string(byteSlice)NeedsInvestigationPerformance

#27148 opened 7 months ago by mvdan

panic during late opt while compiling (*ecdheKeyAgreement).processServerKeyExchangeNeedsInvestigation

#27142 opened 7 months ago by mvdan

Fannkuch benchmark performance regressionNeedsInvestigationPerformance

#27108 opened 7 months ago by kklobe

split up SSA rewrite passes

#27034 opened 7 months ago by mundaym

provide parameter escape information in DWARFDebugging

#27007 opened 7 months ago by heschik

recognize map-copy with range idiomPerformance

#26951 opened 7 months ago by martisch

poor error for constant using missing import NeedsInvestigation

#26818 opened 7 months ago by dsymonds

pack info into low bits of interface type pointersPerformance

#26680 opened 7 months ago by josharian

evaluate map initializers incrementallyPerformanceToolSpeed

#26552 opened 8 months ago by randall77

optimise away deferred calls to empty functionsNeedsFixPerformancehelp wanted

#26534 opened 8 months ago by ainar-g

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

#26498 opened 8 months ago by FMNSSun

consider using DWARF 5Debugging

#26379 opened 8 months ago by aclements

internal prefix paths leaking into generated DWARFDebuggingNeedsFix

#26311 opened 8 months ago by thanm

teach prove about more type conversion operationsNeedsInvestigationPerformance

#26299 opened 8 months ago by mvdan

prove doesn't know that integer extensions preserve boundsNeedsFixPerformance

#26292 opened 8 months ago by mvdan

optimize slice copy via make+copyPerformance

#26252 opened 8 months ago by bontibon

debug info for inlined funcs are sometimes lostDebuggingNeedsInvestigation

#26206 opened 8 months ago by hyangah

msan cannot handle structs with paddingNeedsInvestigation

#26167 opened 8 months ago by benesch

record and use per-function optimization dataPerformance

#25999 opened 9 months ago by josharian

possible missed optimization in append benchmarkNeedsInvestigationPerformance

#25916 opened 9 months ago by perillo

merge sequential memory moves into bigger memory movesNeedsInvestigationPerformance

#25866 opened 9 months ago by valyala

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

#25862 opened 9 months ago by valyala

emit optimized assembly for checking the first chars before `{strings|bytes}.IndexByte` callPerformance

#25844 opened 9 months ago by valyala

cannot handle alias type declarationNeedsFixearly-in-cycle

#25838 opened 9 months ago by griesemer

combine append callsPerformance

#25828 opened 9 months ago by quasilyte

non-inlineable allocating function in closure causes closure to allocateNeedsInvestigationPerformance

#25769 opened 9 months ago by twmb

detect divisions that always result in 0Performance

#25733 opened 9 months ago by davecheney

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

#25693 opened 9 months ago by ysmolsky

inconsistent acceptance of cyclic variable declaration (esoteric)NeedsInvestigation

#25677 opened 9 months ago by griesemer

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

#25635 opened 9 months ago by griesemer

add GOAMD64 architecture variantsPerformance

#25489 opened 10 months ago by josharian

revisit statement boundaries CL peformance and binary size impactNeedsInvestigationToolSpeed

#25426 opened 10 months ago by josharian

aggressive IMUL rewrites on AMD64 sometimes lead to performance regressionsNeedsInvestigationPerformance

#25358 opened 10 months ago by quasilyte

call memmove on amd64 for large OpMovePerformance

#25317 opened 10 months ago by TocarIP

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

#25305 opened 10 months ago by griesemer

tweak branchelim heuristic on amd64Performance

#25298 opened 10 months ago by TocarIP

recursive embedded interface types cause stack overflowNeedsInvestigation

#25262 opened 10 months ago by nathanjcochran

BCE/Prove do not take arithmetic into accountNeedsInvestigation

#25197 opened 10 months ago by navytux

elide useless type assertionPerformance

#25189 opened 10 months ago by dsnet

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

#25169 opened 11 months ago by josharian

detect bounded shifts in generic rulesPerformance

#25168 opened 11 months ago by josharian

use bounded shift information on non-amd64 architecturesPerformanceSuggestedhelp wanted

#25167 opened 11 months ago by josharian

emit variable byte-sized bit tests on amd64Performance

#25156 opened 11 months ago by josharian

eliminate more dead storesPerformance

#25132 opened 11 months ago by TocarIP

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

#25125 opened 11 months ago by mundaym

regalloc's liveness analysis is quadraticToolSpeed

#25120 opened 11 months ago by josharian

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

#25115 opened 11 months ago by josharian

optimize unaligned load-XOR-store on byte slicesPerformance

#25111 opened 11 months ago by mundaym

use bounds from prove pass to simplify shiftsPerformance

#25087 opened 11 months ago by josharian

add bounds information from non-control ops to prove passPerformance

#25086 opened 11 months ago by josharian

sometimes issue rematerializable values earlyPerformance

#24930 opened 11 months ago by josharian

avoiding zeroing new allocations when possiblePerformance

#24926 opened 11 months ago by josharian

compiler variable folding can break linker's -X optionNeedsInvestigation

#24890 opened 11 months ago by simonklb

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

#24876 opened 11 months ago by dgryski

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

#24780 opened 11 months ago by griesemer

unexpected memequal call in short string comparisonNeedsFixPerformanceSuggestedhelp wanted

#24765 opened 11 months ago by bradfitz

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

#24755 opened 11 months ago by mundaym

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

#24721 opened 11 months ago by dotaheor

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

#24689 opened 11 months ago by dhowden

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

#24660 opened 11 months ago by navytux

eliminate empty switch casesNeedsFixPerformance

#24650 opened 11 months ago by josharian

document emitptrargsmap onebitwalktype1 callsDocumentationNeedsFix

#24648 opened 11 months ago by josharian

opt: reuse interface payload during interface conversionPerformance

#24582 opened 1 year ago by alandonovan

less optimized AMD64 codeNeedsFixPerformance

#24537 opened 1 year ago by benshi001

mishandling of unsafe-uintptr argumentsNeedsFix

#24491 opened 1 year ago by mdempsky

optimize large structsNeedsFixPerformance

#24416 opened 1 year ago by randall77

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

#24386 opened 1 year ago by mvdan

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

#24314 opened 1 year ago by navytux

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

#24305 opened 1 year ago by mdempsky

struct field alive too longNeedsFix

#24263 opened 1 year ago by randall77

loop optimizationNeedsInvestigationPerformance

#24240 opened 1 year ago by MichaelTJones

revisit append codegenPerformance

#24209 opened 1 year ago by josharian

tighten CFG as well as valuesPerformance

#24177 opened 1 year ago by josharian

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

#23948 opened 1 year ago by josharian

optimize comparison of large values with zeroPerformance

#23929 opened 1 year ago by josharian

avoid updating capacity if unusedNeedsFixPerformance

#23832 opened 1 year ago by dsnet

use strings.BuilderSuggestedToolSpeedhelp wanted

#23828 opened 1 year ago by josharian

crash on interface embedding cycles if a type alias is usedNeedsFix

#23823 opened 1 year ago by go101

better error message for failed string conversionNeedsFix

#23813 opened 1 year ago by griesemer

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

#23676 opened 1 year ago by dsnet

bad line number in error message calling variadic functionNeedsFix

#23660 opened 1 year ago by josharian

duplicate error on operation with mismatched typesNeedsFix

#23486 opened 1 year ago by mvdan

conversion error is a bit inaccurate

#23394 opened 1 year ago by hirochachacha

inefficient CALL setup when more than 32bytes of argsPerformance

#23377 opened 1 year ago by ALTree

validity of program depends on method declaration order

#23202 opened 1 year ago by griesemer

rewrite escape analysisNeedsInvestigation

#23109 opened 1 year ago by mdempsky

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

#23065 opened 1 year ago by cramertj

inconsistent behaviour in multiple assignmentNeedsFix

#23017 opened 1 year ago by go101

slicing can be improved on ARMPerformance

#23006 opened 1 year ago by rasky

eliminate runtime.conv* calls with unused resultsNeedsFixPerformance

#22971 opened 1 year ago by pavel

unnecessary error after "cannot refer to unexported type"NeedsFix

#22921 opened 1 year ago by mvdan

implement powerpc 32-bit backend (ppc32)FeatureRequest

#22885 opened 1 year ago by rasky

cannot compile valid (but esoteric) self-recursive interface

#22825 opened 1 year ago by griesemer

treat pointer-to-go:notinheap types as scalarNeedsInvestigation

#22519 opened 1 year ago by mdempsky

reordering struct field accesses can alter performanceNeedsInvestigationPerformance

#22479 opened 1 year ago by mvdan

escape analysis loopdepth should reset when blocks endNeedsInvestigation

#22438 opened 1 year ago by mdempsky

ARM: add FMA supportNeedsFix

#22400 opened 1 year ago by rasky

generate correct DW_AT_external flagDebuggingNeedsFix

#22399 opened 1 year ago by thanm

iota inside function in a ConstSpec is not acceptedNeedsFix

#22344 opened 1 year ago by griesemer

incorrect package initialization order for spec exampleNeedsFixearly-in-cycle

#22326 opened 1 year ago by chadwhitacre

odd inlining heuristic under mid-stack inliningNeedsInvestigationPerformance

#22310 opened 1 year ago by mdempsky

regression in TestIntendedInlining on ppc64x, othersNeedsInvestigation

#22239 opened 1 year ago by laboger

consider adding sibling links to generated DWARFDebuggingNeedsInvestigation

#22185 opened 1 year ago by thanm

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

#22167 opened 1 year ago by rsc

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

#22094 opened 2 years ago by crawshaw

avoid allocations for some return valuesNeedsInvestigationPerformance

#22081 opened 2 years ago by crawshaw

"const _ string = 1" error message says integers can't be converted to stringsNeedsFix

#22070 opened 2 years ago by mdempsky

redundant branchPerformance

#22025 opened 2 years ago by randall77

incorrect and duplicate error for invalid string conversionNeedsFixhelp wanted

#21979 opened 2 years ago by griesemer

don't depend on statictmp_ variables being read onlyNeedsFix

#21940 opened 2 years ago by randall77

cleaner solution for exporting linkname infoearly-in-cycle

#21936 opened 2 years ago by mdempsky

selector expression resolves incorrectly for defined pointer typesNeedsFix

#21934 opened 2 years ago by griesemer

constant folding math/bits functionsPerformanceSuggestedhelp wanted

#21872 opened 2 years ago by markus-oberhumer

errors involving aliased types should use the alias nameNeedsFix

#21866 opened 2 years ago by bcmills

failure to reject initialization loopNeedsFix

#21752 opened 2 years ago by mdempsky

obscure initialization loop error message due to inliningNeedsFix

#21750 opened 2 years ago by dvyukov

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

#21735 opened 2 years ago by martisch

optimize away some MOVQconvertsPerformance

#21572 opened 2 years ago by josharian

for small objects, use constants directly instead of copying from statictmpPerformance

#21561 opened 2 years ago by randall77

functions are inlined beyond boundary of shared librariesNeedsFix

#21510 opened 2 years ago by hirochachacha

optimize unsigned comparisons with zero/onePerformanceSuggested

#21439 opened 2 years ago by josharian

coalesce consecutive calls to print/printlnNeedsDecisionPerformance

#21417 opened 2 years ago by josharian

improve codegen for nested if statementsPerformance

#21394 opened 2 years ago by josharian

gdb 8 on windows crashes reading Go binaryNeedsInvestigationOS-Windows

#21380 opened 2 years ago by kjk

add and use go:nosplitrec compilation directiveNeedsFix

#21314 opened 2 years ago by ianlancetaylor

incorrect type assertions on conflicting package namesNeedsFix

#21282 opened 2 years ago by dsnet

late nilcheck elim doesn't elim later nilcheck

#20962 opened 2 years ago by josharian

CSE some function calls args/resultsPerformanceToolSpeed

#20934 opened 2 years ago by josharian

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

#20881 opened 2 years ago by rogpeppe

add OpAMD64CMPptr and friends?NeedsDecision

#20873 opened 2 years ago by josharian

generate same code regardless of whether return values are namedNeedsFix

#20859 opened 2 years ago by bradfitz

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

#20533 opened 2 years ago by alandonovan

include certain NOP instructions when compiler optimizations are disabledDebuggingFeatureRequestNeedsFix

#20487 opened 2 years ago by dlsniper

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

#20486 opened 2 years ago by griesemer

improve loop rotationPerformance

#20411 opened 2 years ago by josharian

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

#20356 opened 2 years ago by josharian

trim more blocks?Performance

#20354 opened 2 years ago by josharian

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

#20321 opened 2 years ago by tzneal

pass values to some convT2ExxxPerformance

#20263 opened 2 years ago by josharian

internal compiler error: esc return list involving constant groups and unsafe.SizeofNeedsFix

#20260 opened 2 years ago by josharian

missing line numbers with cgo pragmasNeedsInvestigation

#20214 opened 2 years ago by josharian

wasted bucket allocated on stack for non-escaping map when hint is not smallPerformanceSuggested

#20184 opened 2 years ago by josharian

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

#20104 opened 2 years ago by josharian

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

#20095 opened 2 years ago by philpennock

add special binary export encoding for iotas?ToolSpeed

#20088 opened 2 years ago by josharian

postpone argument conversions after inliningNeedsFixPerformance

#20087 opened 2 years ago by rasky

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

#20027 opened 2 years ago by go101

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

#20022 opened 2 years ago by zhaozhiqianghw

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

#20021 opened 2 years ago by go101

go:linkname prevents inliningPerformance

#20019 opened 2 years ago by dvyukov

remove Type.VargenNeedsFix

#19878 opened 2 years ago by josharian

possible infinite recursion in Type.cmpNeedsInvestigation

#19869 opened 2 years ago by josharian

share statictmpPerformance

#19818 opened 2 years ago by QuestionPython

avoid copying if copied value isn't modifiedPerformance

#19817 opened 2 years ago by valyala

if x == a || x == b || x == c generates slower code than case a, b, cPerformance

#19791 opened 2 years ago by gaal

slow to compile large map literals containing dynamic elementsToolSpeed

#19751 opened 2 years ago by myleshorton

clumsy rematerialization in mapassign_fast*Performance

#19733 opened 2 years ago by philhofer

arm64: emit double-register loads and stores in loweringNeedsFixPerformance

#19715 opened 2 years ago by philhofer

Unnecessary register high-bytes rezeroing after unsigned right shiftPerformance

#19712 opened 2 years ago by navytux

generate closure for go/defer builtin calls

#19710 opened 2 years ago by unixpickle

eliminate linenoNeedsFixhelp wanted

#19683 opened 2 years ago by mdempsky

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

#19650 opened 2 years ago by mdempsky

avoid multiple returns from deferproc

#19466 opened 2 years ago by randall77

method is inlined instead of loaded from shared library

#19398 opened 2 years ago by davidlazar

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

#19379 opened 2 years ago by opennota

Devirtualize calls when concrete type behind interface is statically knownNeedsFixPerformance

#19361 opened 2 years ago by navytux

enable mid-stack inliningPerformanceProposalProposal-Accepted

#19348 opened 2 years ago by davidlazar

needlessly early return value loads in runtime.scanobjectPerformance

#19195 opened 2 years ago by josharian

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

#19165 opened 2 years ago by valyala

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

#19126 opened 2 years ago by navytux

add tool for understanding/debugging SSA rules

#19013 opened 2 years ago by josharian

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

#18977 opened 2 years ago by cherrymui

1.7 compiler does not compile program with large complex struct

#18920 opened 2 years ago by rdvorak

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

#18822 opened 2 years ago by ianlancetaylor

order.go is outdatedPerformanceToolSpeed

#18739 opened 2 years ago by josharian

avoid using large stack to partially zero structPerformance

#18636 opened 2 years ago by dsnet

performance problems with many long, exported identifiersNeedsInvestigationToolSpeed

#18602 opened 2 years ago by cretz

define register-based calling conventionProposalProposal-Hold

#18597 opened 2 years ago by dr2chase

fixedbug/issue10958.go failuresNeedsInvestigationTesting

#18589 opened 2 years ago by ALTree

byte type conversion optimizationsPerformance

#18575 opened 2 years ago by josselin-c

improve code generation for temporary slice copy and inliningPerformance

#18529 opened 2 years ago by rasky

eliminate some partial function / closure allocationsPerformance

#18493 opened 2 years ago by josharian

optimize type switchNeedsFixPerformance

#18492 opened 2 years ago by bradfitz

investigate closure capture issueNeedsInvestigationPerformance

#18300 opened 2 years ago by bradfitz

generate static calls when callee is knownPerformance

#18270 opened 2 years ago by alandonovan

remove stack check for leaf routinesPerformance

#18269 opened 2 years ago by randall77

some local variables are missing from DWARFDebugging

#18247 opened 2 years ago by alandonovan

improve map iterationPerformance

#18004 opened 2 years ago by cherrymui

insertVarPhis is very slowToolSpeed

#17926 opened 2 years ago by dvyukov

elide branches that must be takenPerformance

#17862 opened 2 years ago by dsnet

implement duffcopy on ppc64xPerformance

#17842 opened 2 years ago by bradfitz

spurious `foo.func1 redeclared in this block`NeedsFix

#17758 opened 2 years ago by dominikh

merge order/walk/instrument into buildssaToolSpeed

#17728 opened 2 years ago by mdempsky

remove all pointers from type information

#17724 opened 2 years ago by crawshaw

use better code for slicingPerformance

#17638 opened 2 years ago by randall77

optimize functions into boolean expressionsPerformance

#17622 opened 2 years ago by dsnet

improve inlining cost modelPerformanceToolSpeed

#17566 opened 2 years ago by josharian

-bench should correct for GCNeedsFix

#17434 opened 2 years ago by mdempsky

escape analysis too pessimistic for value-captures at closure evaluation.NeedsFixPerformanceearly-in-cycle

#17388 opened 2 years ago by dr2chase

large arrays cause large binaries and toolchain errorsNeedsDecision

#17378 opened 2 years ago by crawshaw

eliminate more bounds checksPerformance

#17370 opened 2 years ago by carl-mastrangelo

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

#17314 opened 2 years ago by dAdAbird

generate the likely/unlikely bit on branches for ppc64xNeedsFixPerformance

#17235 opened 2 years ago by laboger

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

#17220 opened 2 years ago by nigeltao

elimination of unused runtime callsPerformance

#17216 opened 2 years ago by DmitriyMV

optimizing multiple accesses to same key in mapNeedsFixPerformance

#17133 opened 2 years ago by rasky

pointless static copy codeNeedsFixPerformanceToolSpeed

#17113 opened 2 years ago by josharian

avoid reloads of temp register on ppc64le, othersNeedsFixPerformance

#17110 opened 2 years ago by laboger

combine contiguous multi-byte comparisons to a constantPerformance

#17106 opened 2 years ago by josharian

reuse algs for [N]T arrays

#17031 opened 2 years ago by mdempsky

make algs content-addressable

#17029 opened 2 years ago by josharian

detect call trees that can be marked NOSPLITPerformance

#17023 opened 2 years ago by josharian

use common ancestor blocks in CSE?Performance

#16973 opened 2 years ago by josharian

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

#16929 opened 2 years ago by mdempsky

inline reflect.TypeOf?Performance

#16869 opened 2 years ago by bradfitz

teach BCE about copy return valuePerformance

#16833 opened 2 years ago by josharian

should recognize binary package and intrinsify it where possiblePerformance

#16832 opened 2 years ago by dr2chase

make SSA IDs stable across passesNeedsFix

#16754 opened 2 years ago by bradfitz

move SSA boolean optimizations to generic level

#16747 opened 2 years ago by josharian

missed prove inferences with uint conversionsNeedsFixPerformance

#16653 opened 2 years ago by josharian

print better error message when assigning to keywords

#16521 opened 2 years ago by dsnet

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

#16416 opened 2 years ago by josharian

slightly unclear heap escape message (with -m)NeedsFix

#16300 opened 2 years ago by cespare

make UNDEF into a pseudo-instructionNeedsFix

#16291 opened 2 years ago by josharian

new backend; multiple efficiency issues...NeedsFixPerformance

#16192 opened 2 years ago by GordonBGood

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

#16187 opened 2 years ago by taruti

go1.7beta2 performance regressionNeedsFixPerformance

#16141 opened 2 years ago by samuel

poor register allocator behavior in compression codeNeedsFixPerformance

#16122 opened 2 years ago by flanglet

do front-end constant evaluation across simple inlined function boundariesNeedsFixPerformance

#16108 opened 2 years ago by josharian

complicated bounds check eliminationNeedsFixPerformance

#16092 opened 2 years ago by GordonBGood

escape analysis of interface calls to unexported method names

#16001 opened 2 years ago by mdempsky

SSA performance regression due to array zeroingNeedsFixPerformance

#15925 opened 2 years ago by hydroflame

add and use yyerrornNeedsFix

#15913 opened 2 years ago by josharian

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

#15812 opened 2 years ago by randall77

loads/constants not lifted out of loopNeedsFixPerformance

#15808 opened 2 years ago by randall77

signed rounding adjustments unnecessary when comparing modulus to 0NeedsFixPerformancehelp wanted

#15806 opened 2 years ago by randall77

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

#15785 opened 2 years ago by tmielcza

poor error message when invoking method on embedded typeNeedsFix

#15711 opened 2 years ago by dsymonds

make ascompatte generate less garbageNeedsFix

#15665 opened 2 years ago by josharian

better error message for scoped type errorNeedsFix

#15575 opened 2 years ago by gouthamve

support inlining non-escaping closuresPerformance

#15561 opened 2 years ago by josharian

SSA performance regression on polygon codeNeedsFixPerformanceearly-in-cycle

#15532 opened 2 years ago by nkovacs

evaluate the need for shortcircuitNeedsInvestigationPerformanceearly-in-cycle

#15512 opened 2 years ago by brtzsnr

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

#15481 opened 2 years ago by adonovan

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

#15459 opened 2 years ago by dominikh

unexplained allocation for convT2IPerformance

#15451 opened 2 years ago by robpike

ephemeral slicing doesn't need protection against next object pointersPerformance

#15397 opened 2 years ago by randall77

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

#15375 opened 2 years ago by randall77

move Type.Width and Type.Align into Extra fieldsToolSpeed

#15308 opened 2 years ago by josharian

combine extension with register loads and stores on amd64Performance

#15300 opened 2 years ago by josharian

sync/atomic.SwapPointer arguments escape for the wrong reasonNeedsFix

#15283 opened 2 years ago by aclements

eliminate write barrier for self-referencing pointerPerformance

#15238 opened 2 years ago by randall77

suboptimal compilation of struct-valued switch statementsPerformance

#15164 opened 3 years ago by mdempsky

possible inlining bug with variable renaming?

#15111 opened 3 years ago by griesemer

make available as a library

#15108 opened 3 years ago by ghost

generate MOVZX instead of AND where applicablePerformance

#15105 opened 3 years ago by martisch

bounds check not removed after "if index < length"Performance

#15074 opened 3 years ago by rasky

adding a constant to a memory location needs 3 instructionsPerformance

#15054 opened 3 years ago by brtzsnr

merge TPTR32 and TPTR64 into TPTR?

#15032 opened 3 years ago by mdempsky

unnecessary branchingPerformance

#15031 opened 3 years ago by randall77

BLAS Idamax regressionNeedsFixPerformanceearly-in-cycle

#14995 opened 3 years ago by btracey

confusing type checking errorNeedsFix

#14948 opened 3 years ago by aclements

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

#14921 opened 3 years ago by josharian

improve escape analysis understanding of tree structures

#14858 opened 3 years ago by josharian

unnecessary bounds checks are not removedPerformance

#14808 opened 3 years ago by brtzsnr

for-loops cannot be inlinedPerformance

#14768 opened 3 years ago by dsnet

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

#14762 opened 3 years ago by randall77

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

#14723 opened 3 years ago by brtzsnr

"dot import" causes confusing error in 1.6NeedsFixhelp wanted

#14683 opened 3 years ago by ThisGuyCodes

performance of embedded interfaces

#14677 opened 3 years ago by OneOfOne

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

#14620 opened 3 years ago by rsc

SSA, use CMPconst for write barrierPerformance

#14587 opened 3 years ago by randall77

SSA, don't re-copy spilled output parametersPerformance

#14586 opened 3 years ago by randall77

coverage instrumentation for fuzzing

#14565 opened 3 years ago by dvyukov

recognize append loopPerformance

#14325 opened 3 years ago by bradfitz

stack overflow accessing large return valueNeedsFix

#14028 opened 3 years ago by Opposition

Need better type propagationPerformance

#14018 opened 3 years ago by dr2chase

runs out of memory allocating 12k + items in a map at init, works as literal mapNeedsFix

#13554 opened 3 years ago by pindamonhangaba

escape analysis overconservative for recursive callsNeedsFix

#13547 opened 3 years ago by dr2chase

storing pointer of a local value escapesPerformance

#13493 opened 3 years ago by dsnet

Suggest typo fixes for resolution errors

#13477 opened 3 years ago by Manishearth

performance issue with ranging over stringPerformance

#13162 opened 3 years ago by mpvl

turn nilcheckelim into branchelimNeedsFixPerformance

#12628 opened 3 years ago by josharian

clarify how unsafe.Pointers may be used to determine offsets between addresses

#12445 opened 3 years ago by kortschak

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

#12399 opened 3 years ago by doherty

real and imag don't accept untyped non-complex constants as arguments

#11946 opened 3 years ago by griesemer

reconsider zeroing thresholds for arm64

#10981 opened 3 years ago by josharian

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

#10936 opened 3 years ago by dr2chase

constant indexing into map literals should be folded

#10848 opened 3 years ago by mdempsky

inefficient increment of global array

#10432 opened 4 years ago by dvyukov

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

#10382 opened 4 years ago by josharian

assigning large values does not use memmove

#10362 opened 4 years ago by davecheney

inline function calls that return a closurePerformance

#10292 opened 4 years ago by potocnyj

improve generated type equality code

#9930 opened 4 years ago by josharian

don't emit writebarrier for stores to newly allocated objectsPerformance

#9755 opened 4 years ago by dvyukov

better error message when attempting to use a shadowed type name

#9655 opened 4 years ago by pwaller

enhancements to the gc inliner and optimizer

#9337 opened 4 years ago by tildeleb

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

#8983 opened 4 years ago by gopherbot

optimisations change the behaviour of *struct{}

#8938 opened 4 years ago by ainar-g

recognize case <-time.After(x)Performance

#8895 opened 4 years ago by dvyukov

confusing error messages when a type is repeatedSuggested

#8853 opened 4 years ago by btracey

merge temporaries more aggressivelyNeedsFixPerformance

#8740 opened 4 years ago by josharian

atomic intrinsics for runtime and sync/atomicPerformance

#8739 opened 4 years ago by dvyukov

random performance fluctuations after unrelated changesNeedsFixPerformance

#8717 opened 4 years ago by dvyukov

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

#8659 opened 4 years ago by btracey

confusing and inconsistent error messages for syntactically incorrect method expressions

#8605 opened 4 years ago by griesemer

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

#8560 opened 4 years ago by adonovan

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

#8481 opened 4 years ago by augustoroman

inline forwarding thunk functionsPerformance

#8421 opened 4 years ago by dvyukov

Wrong type reported for constant in type mismatch report

#8409 opened 4 years ago by btracey

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

#8357 opened 4 years ago by gopherbot

Opportunity for de-pessimization in provably const range loopsSuggested

#8346 opened 4 years ago by thockin

does not understand old linker flags

#8104 opened 4 years ago by dvyukov

report all missing methods on failed interface satisfaction

#8095 opened 4 years ago by btracey

independent variables should be initialized in declaration order

#7962 opened 4 years ago by griesemer

rethink temporary names

#7923 opened 4 years ago by josharian

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

#7921 opened 4 years ago by lukescott

crash due to running out of memory (likely)

#7755 opened 5 years ago by griesemer

escape analysis does not analyze closure callsPerformance

#7714 opened 5 years ago by randall77

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

#7681 opened 5 years ago by randall77

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

#7651 opened 5 years ago by mpvl

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

#7637 opened 5 years ago by josharian

do more static initialization at compile time rather than runtime

#7599 opened 5 years ago by josharian

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

#7495 opened 5 years ago by griesemer

top-level var does not respect , rule

#7320 opened 5 years ago by adonovan

escape analysis oddity

#7213 opened 5 years ago by davecheney

allocate some defers in stack framesNeedsFixPerformanceearly-in-cycle

#6980 opened 5 years ago by randall77

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

#6814 opened 5 years ago by btracey

support for explicit alignment annotationsThinking

#6752 opened 5 years ago by gopherbot

skip slicebytetostring when argument doesn't escapeGarbageCollectorPerformance

#6714 opened 5 years ago by bradfitz

use less memory for large []byte literalNeedsFixToolSpeedhelp wanted

#6643 opened 5 years ago by rsc

internal compiler error with self-referential method in interface

#6638 opened 5 years ago by griesemer

spurious error for recursive anonymous interface type

#6601 opened 5 years ago by adonovan

odd/inconsistent behavior with cyclic declarations

#6590 opened 5 years ago by griesemer

8MB error message for one char error

#6589 opened 5 years ago by griesemer

missing "imported and not used" error for dot-import

#6428 opened 5 years ago by griesemer

unsafe.Pointer not treated as a pointer for embedding

#6357 opened 5 years ago by griesemer

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

#6206 opened 5 years ago by gopherbot

less export data

#6110 opened 5 years ago by robpike

missed escape analysis opportunity

#5919 opened 5 years ago by edsrzf

emits unnecessary deferreturnPerformance

#5712 opened 5 years ago by dvyukov

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

#5496 opened 5 years ago by cloneable

avoid closure for captured dynamic constant

#5370 opened 5 years ago by lexprfuncall

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

#5142 opened 6 years ago by btracey

more clever syntax error reporting

#5129 opened 6 years ago by btracey

init loop does not trace through inlined functions

#4758 opened 6 years ago by rsc

omit zeroing of named return value when possible

#4750 opened 6 years ago by rsc

error message for bad case in switch should suggest selectThinking

#4697 opened 6 years ago by adg

introduce CINT64 to reduce memory footprint

#4617 opened 6 years ago by davecheney

panicking composite literals not properly flushed to globalsThinking

#4608 opened 6 years ago by DanielMorsing

which errors are confusing?Suggested

#4566 opened 6 years ago by rsc

possible error message improvement

#4565 opened 6 years ago by rsc

compiler can fault in low memory conditions

#4415 opened 6 years ago by bradfitz

eliminate duplicate instrumentation in racewalkPerformanceRaceDetector

#4247 opened 6 years ago by dvyukov

output variable names in data race reportsRaceDetector

#4246 opened 6 years ago by dvyukov

diagnose unused variable even in closureNeedsFixearly-in-cycle

#3059 opened 7 years ago by rogpeppe

why are stack frames so large?Performancehelp wanted

#2734 opened 7 years ago by rsc

static init maps should never generate codeNeedsInvestigation

#2559 opened 7 years ago by rsc

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

#2474 opened 7 years ago by rsc

include registerization info for gdb

#2430 opened 7 years ago by ianlancetaylor

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

#2205 opened 7 years ago by bradfitz

infinite recursion generating symbol for recursive type

#1909 opened 7 years ago by gopherbot

1.3MB program takes 290MB of memory to compilePerformance

#1860 opened 7 years ago by davecheney

make 64-bit fields 64-bit aligned on 32-bit systemsNeedsInvestigation

#599 opened 9 years ago by rsc