cmd/compile

incorrect math reductionarch-arm64compiler/runtimerelease-blocker

#70481 opened 4 hours ago by randall77

register allocation of rematerializable ops ignores the op output register constraints.NeedsInvestigationcompiler/runtime

#70451 opened 1 day ago by prattmic

some codes in DSE rely on the order of valuesNeedsInvestigationcompiler/runtime

#70409 opened 2 days ago by fengyoulin

provide default PGO profiles that cover the runtimeFeatureRequestNeedsInvestigationPerformancecompiler/runtime

#70393 opened 4 days ago by Jorropo

TestScript/script_test_basics failuresNeedsInvestigationOS-NetBSDarch-arm64compiler/runtimehelp wanted

#70356 opened 6 days ago by gopherbot

memcombine does not combine stores separated by OpLocalAddrNeedsInvestigationPerformancecompiler/runtime

#70300 opened 1 week ago by fengyoulin

consider giving a warning or an error if a PGO profile looks mismatchedNeedsInvestigationThinkingcompiler/runtime

#70291 opened 1 week ago by mvdan

deadlock in sync.Mutex.LockWaitingForInfocompiler/runtime

#70256 opened 1 week ago by karalabe

linux/mips fails to make.bash with "internal compiler error: panic: runtime error: index out of range [0] with length 0"NeedsInvestigationOS-Linuxarch-mipscompiler/runtime

#70248 opened 1 week ago by dmitshur

doesn't inline basic funcs and doesn't optimize code after inliningNeedsInvestigationPerformancecompiler/runtime

#70235 opened 2 weeks ago by david-its

declare and assign of function literal escapes to heapNeedsInvestigationPerformancecompiler/runtime

#70171 opened 2 weeks ago by qdongxu

unrecognized failuresNeedsInvestigationWaitingForInfocompiler/runtime

#70103 opened 3 weeks ago by gopherbot

missed bounds check elimination when paired slices are reslicedNeedsInvestigationPerformancecompiler/runtime

#70062 opened 3 weeks ago by FiloSottile

should delete loops without side-effectsNeedsInvestigationPerformancecompiler/runtimehelp wanted

#69889 opened 1 month ago by dominikh

inlining of range funcs should be more aggressiveNeedsInvestigationPerformancecompiler/runtime

#69885 opened 1 month ago by dominikh

segmentation fault on trivial tests (openbsd-ppc64)NeedsInvestigationcompiler/runtime

#69773 opened 1 month ago by gopherbot

possible PGO miscompilation in biogo-igor benchmarkNeedsInvestigationcompiler/runtime

#69614 opened 1 month ago by mknyszek

add epilogue_begin to DWARF line infoFeatureRequestNeedsInvestigationcompiler/runtimehelp wanted

#69329 opened 2 months ago by ajwerner

.closureptr elided in optimized binariesNeedsInvestigationcompiler/runtime

#69307 opened 2 months ago by aarzilli

deadstores and nilchecks solvable after memory to ssa renames are not handledNeedsInvestigationcompiler/runtime

#69174 opened 2 months ago by mariecurried

type parameter involving constraint with channels seems like it should be inferrableTypeInferencecompiler/runtime

#69153 opened 2 months ago by mark-rushakoff

PGO fails to do multiple levels of inlining into a single functionNeedsFixcompiler/runtime

#69046 opened 2 months ago by prattmic

iter implementations significantly slower than equivalent for loopsNeedsInvestigationPerformancecompiler/runtime

#69015 opened 3 months ago by kscooo

inaccurate compiler error on duplicate wasmexport symbolNeedsFixcompiler/runtime

#68982 opened 3 months ago by johanbrandhorst

pgo after CL 449477 cause worse performance on benchmarkWaitingForInfocompiler/runtime

#68974 opened 3 months ago by qiulaidongfeng

amd64 carry flag spilling uses SBBQ + NEGQ instead of SETCSNeedsInvestigationPerformancecompiler/runtimehelp wanted

#68961 opened 3 months ago by bremac

in `prove.go:addLocalFacts` `ft.update` propagates limits depends on value ordering and can't propagate `ft.update` → `ft.flowLimit` dependenciesNeedsInvestigationPerformancecompiler/runtime

#68857 opened 3 months ago by Jorropo

pgo causes worse performance on some benchmarksNeedsInvestigationPerformancecompiler/runtime

#68815 opened 3 months ago by qiulaidongfeng

PGO devirtualization of generic method callNeedsInvestigationPerformancecompiler/runtime

#68787 opened 3 months ago by bboreham

Inaccurate AuxInt value for newobject callNeedsInvestigationcompiler/runtime

#68631 opened 3 months ago by And-ZJ

allow parameterized type aliases to omit redundant type parametersNeedsInvestigationThinkingcompiler/runtime

#68617 opened 3 months ago by adonovan

teach BCE about `min` builtinNeedsInvestigationPerformancecompiler/runtime

#68553 opened 4 months ago by tdakkota

seemingly valid generic interface rejectedNeedsInvestigationcompiler/runtimeearly-in-cycle

#68162 opened 4 months ago by griesemer

incorrect compilation of specific functions in wasmNeedsInvestigationcompiler/runtime

#68156 opened 4 months ago by kkoreilly

large type switches that always match the first value are slower in Go 1.22NeedsInvestigationcompiler/runtime

#68125 opened 5 months ago by dominiquelefevre

inliner does not inline `binary.*Endian.Uint*` after many inlines in a big functionNeedsDecisioncompiler/runtime

#68081 opened 5 months ago by Jorropo

gracefully exit on parser stack overflowNeedsFixcompiler/runtime

#68033 opened 5 months ago by griesemer

declaration order of types affects cycle detection NeedsFixcompiler/runtimeearly-in-cycle

#68025 opened 5 months ago by richardwilkes

add string constants to DWARFFeatureRequestNeedsInvestigationcompiler/runtime

#67744 opened 5 months ago by Benoit12345

"panic: unification reached recursion depth limit" with recursive type constraintNeedsInvestigationcompiler/runtimeearly-in-cycle

#67627 opened 6 months ago by camhux

arm64 multiplication with constant optimizationNeedsInvestigationPerformancearch-arm64compiler/runtimehelp wanted

#67575 opened 6 months ago by egonelbre

`go:readonly` comment directive for body-less functionsProposalcompiler/runtime

#67364 opened 6 months ago by Jorropo

`-race` should report the allocation site of the object involved in the data raceProposal

#67221 opened 6 months ago by chabbimilind

missing DWARF location lists for local variables in optimized codeFeatureRequestNeedsInvestigationcompiler/runtime

#67130 opened 6 months ago by andreimatei

relax wasm/wasm32 function import signature type constraintsProposalProposal-Acceptedcompiler/runtime

#66984 opened 7 months ago by johanbrandhorst

add support for shadow stackNeedsInvestigationcompiler/runtime

#66840 opened 7 months ago by loqs

unnecessary bounds check with slice offsetNeedsInvestigationPerformancecompiler/runtime

#66691 opened 7 months ago by dsnet

static allocation should work with constant propagation and inliningNeedsInvestigationPerformancecompiler/runtime

#66671 opened 7 months ago by dsnet

optimisation opportunity with nested iteratorsNeedsInvestigationcompiler/runtime

#66469 opened 8 months ago by rogpeppe

use mapaccess1_fast64 for small keysNeedsDecisioncompiler/runtime

#66446 opened 8 months ago by dsnet

greedy basic block layoutNeedsInvestigationPerformancecompiler/runtime

#66420 opened 8 months ago by y1yang0

special case and/or add function for getting an arbitrary entry from a mapProposalcompiler/runtime

#66361 opened 8 months ago by bradfitz

dynamic checks for atomics should be removed for ARM64 targets that support LSEFixPendingarch-arm64compiler/runtime

#66131 opened 8 months ago by andreybokhanko

loopvar doesn't trigger nocopy detectionNeedsInvestigationcompiler/runtime

#66070 opened 8 months ago by zigo101

add support for control flow integrityNeedsInvestigationcompiler/runtime

#66054 opened 8 months ago by 4a6f656c

loop inversion does not support unsigned numbersPerformancecompiler/runtime

#65918 opened 9 months ago by Jorropo

bootstrap glitch with version checking on min/max usageNeedsInvestigationcompiler/runtime

#65886 opened 9 months ago by thanm

expose what contributes to consuming the inlining budgetNeedsInvestigationPerformance

#65780 opened 9 months ago by jespino

inconsistent typechecking with self-referential type parameter constraints NeedsInvestigationcompiler/runtimeearly-in-cyclegenerics

#65714 opened 9 months ago by dawidl022

avoid call to runtime.makeslice for zero-length types?NeedsInvestigationPerformancecompiler/runtime

#65685 opened 9 months ago by bradfitz

generics add significant build time and build size overheadNeedsInvestigationToolSpeedbinary-sizecompiler/runtime

#65605 opened 9 months ago by xaurx

exponential behavior for deeply nested structsNeedsFixToolSpeedcompiler/runtime

#65540 opened 9 months ago by randall77

compiler assumes `[2]T` does not alias with `struct{a, b T}` which might be allowed by the `unsafe` packageDocumentationNeedsFix

#65535 opened 9 months ago by Jorropo

pgo can dramatically increase goroutine stack sizeNeedsInvestigationcompiler/runtime

#65532 opened 9 months ago by felixge

TypeOf(a) == TypeOf(b) doesn't optimize wellNeedsInvestigationPerformancecompiler/runtime

#65524 opened 9 months ago by dominikh

unnecessary temporary variable on stackFixPendingNeedsInvestigationcompiler/runtime

#65495 opened 9 months ago by katsusan

add basic block counters for PGONeedsInvestigationcompiler/runtime

#65466 opened 9 months ago by alexanius

performance of go wasm is very poorNeedsInvestigationPerformancearch-wasmcompiler/runtime

#65440 opened 9 months ago by liutao-liu

DIE with empty locations generated with optimizations disabledNeedsInvestigationcompiler/runtime

#65405 opened 9 months ago by aarzilli

cross compiled arm64 binary can not execute and no response, the program seem to be hungNeedsInvestigation

#65361 opened 9 months ago by dabaosun

unsafe conversion from slice to struct pointer generates worse code on amd64 than on 386FeatureRequestNeedsInvestigationPerformancecompiler/runtime

#65330 opened 9 months ago by dominikh

code generates unnecessary mov-sNeedsInvestigationPerformancecompiler/runtime

#65192 opened 10 months ago by egonelbre

move basic blocks, which return non-nil errors, to the end of assembly outputNeedsInvestigationPerformancecompiler/runtime

#65068 opened 10 months ago by valyala

flagalloc doesn't delete dead instructionsNeedsFixPerformancecompiler/runtime

#65039 opened 10 months ago by dominikh

improve fn arg recovery in tracebacks via call site recordsNeedsDecisioncompiler/runtime

#65021 opened 10 months ago by thanm

negative types are allowed, but will not be negative during program execution, with boundary checkingNeedsInvestigationPerformancecompiler/runtime

#64895 opened 10 months ago by qiulaidongfeng

confusing error message for not implementing a pointer to an interfaceNeedsInvestigationcompiler/runtime

#64838 opened 11 months ago by cherrymui

devirtualization of interface calls with type assertionsFeatureRequestNeedsInvestigationPerformancecompiler/runtime

#64824 opened 11 months ago by mateusz834

include PGO devirtualization targets in export dataNeedsInvestigationPerformancecompiler/runtime

#64676 opened 11 months ago by prattmic

PGO devirtualization of closuresNeedsInvestigationPerformancecompiler/runtime

#64675 opened 11 months ago by prattmic

PGO devirtualization of partial interface implementationsNeedsInvestigationPerformancecompiler/runtime

#64673 opened 11 months ago by prattmic

pre-allocate a slice of provable length NeedsInvestigationPerformancecompiler/runtime

#64595 opened 11 months ago by dsnet

pgo support for external Linux perf profiles and perf_data_converterNeedsInvestigationcompiler/runtimehelp wanted

#64489 opened 11 months ago by zamazan4ik

pgo weighted merge supportNeedsInvestigationcompiler/runtime

#64487 opened 11 months ago by zamazan4ik

fatal error: checkptr: pointer arithmetic computed bad pointer valueNeedsInvestigationcompiler/runtime

#64467 opened 11 months ago by gucio321

do not implicitly set `-checkptr` to 2 when `-asan` is turned onProposal

#64397 opened 11 months ago by zhangfannie

race support for riscv64NeedsDecisionRaceDetectorarch-riscvcompiler/runtime

#64345 opened 1 year ago by mauri870

unexpected benchmark resultsNeedsInvestigationPerformancecompiler/runtime

#64328 opened 1 year ago by zigo101

missing BCE optimization casesNeedsInvestigationPerformancecompiler/runtime

#64272 opened 1 year ago by zigo101

can't override variable with ldflags when initial value is a funcNeedsInvestigationcompiler/runtime

#64246 opened 1 year ago by sethvargo

suboptimal compilation of reflect.isZeroNeedsInvestigationPerformancecompiler/runtime

#64222 opened 1 year ago by qiulaidongfeng

implement support for Alias types nodes in export data formatNeedsFixcompiler/runtimeearly-in-cycle

#64208 opened 1 year ago by griesemer

panic due to undocumented `gotypesalias` GODEBUG in types2NeedsInvestigation

#64177 opened 1 year ago by gopherbot

segfaults on loong64NeedsInvestigationarch-loong64compiler/runtime

#64134 opened 1 year ago by gopherbot

FuncForPC on a generic struct method is different from a non-generic structNeedsInvestigationcompiler/runtime

#63945 opened 1 year ago by mitar

failures with `not a Go object file`NeedsInvestigationcompiler/runtimehelp wanted

#63866 opened 1 year ago by gopherbot

type sets are not correctly deduced for type conversion on type paramscompiler/runtime

#63827 opened 1 year ago by nevkontakte

some case can be inlined before unified ir(go1.19-), but can't be inilned after unified ir(go1.20+) NeedsInvestigationcompiler/runtime

#63687 opened 1 year ago by peter-xiao

loop invariant code motionNeedsInvestigationPerformancecompiler/runtime

#63670 opened 1 year ago by y1yang0

missing error reports for program with large stack frameNeedsInvestigationcompiler/runtime

#63616 opened 1 year ago by cuonglm

`internal compiler error` compiling `net` on `darwin-amd64-11_0`NeedsInvestigationOS-Darwincompiler/runtime

#63296 opened 1 year ago by gopherbot

create GOARCH=wasm32ProposalProposal-Acceptedarch-wasm

#63131 opened 1 year ago by johanbrandhorst

flashing optimization indexing into arrays bounded by a modulo bellow or equal to the length only works if the modulo is a sub expression of the indexingNeedsFixPerformancecompiler/runtime

#63110 opened 1 year ago by Jorropo

avoid always escaping the receivers in interface method callsNeedsFixcompiler/runtime

#62653 opened 1 year ago by thepudds

plan9 fatal error: invalid pointer found on stackNeedsFixcompiler/runtimehelp wanted

#62507 opened 1 year ago by bradfitz

recursive functions are escape analyzed context insensitivelyNeedsFixcompiler/runtime

#62501 opened 1 year ago by mdempsky

PGO opportunities umbrella issueNeedsInvestigationcompiler/runtimeumbrella

#62463 opened 1 year ago by aclements

dead code-elimination should work for sync.OnceValueFeatureRequestNeedsInvestigationbinary-sizecompiler/runtime

#62202 opened 1 year ago by dsnet

treat bool-to-int conversion as a constant for optimization for more complex patternsFeatureRequestNeedsInvestigationPerformancecompiler/runtime

#62049 opened 1 year ago by dsnet

redesign PCDATA encodingFeatureRequestNeedsFixPerformancebinary-sizecompiler/runtime

#61984 opened 1 year ago by aclements

compiler stores a stack pointer into a global objectNeedsInvestigationcompiler/runtime

#61730 opened 1 year ago by wildoranges

missing DWARF location list for function arg; stack spill not used for loclistNeedsInvestigationcompiler/runtime

#61703 opened 1 year ago by andreimatei

nonsensical DWARF location lists produced for function argumentNeedsInvestigationcompiler/runtime

#61700 opened 1 year ago by andreimatei

allow some calls to generic functions in pre-go1.18 codeNeedsInvestigationcompiler/runtimegenerics

#61689 opened 1 year ago by rogpeppe

unhelpful error message with recursive constraintBadErrorMessageNeedsInvestigationTypeInferencecompiler/runtimegenerics

#61685 opened 1 year ago by rogpeppe

panic in `cmd/compile/internal/types.(*Type).Size` via `cmd/compile/internal/ssa.(*slotCanonicalizer).lookup`compiler/runtime

#61570 opened 1 year ago by bcmills

overhaul inlinerPerformancecompiler/runtime

#61502 opened 1 year ago by aclements

DWARF duplicated DW_TAG_formal_parameter for some functionsDebuggingNeedsInvestigationcompiler/runtime

#61357 opened 1 year ago by dev747368

bounds check not neededNeedsInvestigationPerformancecompiler/runtime

#61333 opened 1 year ago by KaurkerDevourer

speed up heap allocations in loopsFeatureRequestNeedsInvestigationPerformancecompiler/runtime

#60879 opened 1 year ago by CAFxX

invalid DWARF location list for local var - erroneously extends to function epilogueNeedsInvestigationcompiler/runtimehelp wanted

#60493 opened 2 years ago by andreimatei

regression in DWARF location lists caused by "issue VarDef only for pointer-ful types" NeedsInvestigationcompiler/runtime

#60479 opened 2 years ago by andreimatei

var _ = f prevents f from being dead-code eliminatedFeatureRequestNeedsInvestigationbinary-sizecompiler/runtime

#60464 opened 2 years ago by neild

closure func name changes when inliningNeedsFixcompiler/runtime

#60324 opened 2 years ago by rsc

update compiler's PGO profile as part of rc1 relui flowBuildersNeedsFixrecurringrelease-blocker

#60234 opened 2 years ago by cherrymui

support -buildmode=pie on OpenBSDFeatureRequestNeedsInvestigationOS-OpenBSD

#59866 opened 2 years ago by catinello

Go code in shared library under Android can't read env variablesNeedsInvestigationOS-Androidmobile

#59843 opened 2 years ago by awsong

generic code behaves differently from non-generic codeNeedsInvestigationcompiler/runtime

#59827 opened 2 years ago by zigo101

optimize recursive closure callsFeatureRequestNeedsDecisionPerformancecompiler/runtime

#59708 opened 2 years ago by adonovan

range loop with large element has a significant costNeedsInvestigationPerformancecompiler/runtime

#59706 opened 2 years ago by egonelbre

share more constantscompiler/runtime

#59670 opened 2 years ago by aclements

go:linkname causes "internal compiler error: panic: runtime error: invalid memory address or nil pointer dereference"NeedsInvestigationcompiler/runtime

#59621 opened 2 years ago by mandriota

support for LBR profiles in PGONeedsInvestigationPerformancecompiler/runtime

#59616 opened 2 years ago by prattmic

add intra-line discrimination to PGO profilesNeedsDecisionPerformancecompiler/runtime

#59612 opened 2 years ago by prattmic

better optimization of type switches in instantiated generic functionsFeatureRequestNeedsInvestigationPerformancecompiler/runtime

#59591 opened 2 years ago by ianlancetaylor

buildmode c-archive not supported on linux/mips64leFeatureRequestNeedsFixarch-mipscompiler/runtime

#59561 opened 2 years ago by 23083940

redundant loads in strconv not eliminatedFeatureRequestNeedsInvestigationPerformancecompiler/runtime

#59478 opened 2 years ago by nngffhj

implement more optimizations on loong64NeedsFixPerformancearch-loong64compiler/runtime

#59120 opened 2 years ago by xen0n

mod operator is very slow on intel hardware with int64NeedsInvestigationPerformancecompiler/runtimehelp wanted

#59089 opened 2 years ago by rcsaquino

does not inline method of generic type across packages when there are multiple instantiationsNeedsInvestigationcompiler/runtime

#59070 opened 2 years ago by 578559967

bad DWARF location for variableNeedsInvestigationcompiler/runtime

#58813 opened 2 years ago by aarzilli

incorrect program produces "invalid syntax tree" errorNeedsFixcompiler/runtime

#58612 opened 2 years ago by griesemer

expose -ptabs/-exporttypes flag to force compiler to emit ptabs/type infoProposal

#58567 opened 2 years ago by eh-steve

mips/mips64 floating point negation does not handle NaN correctlyNeedsDecisionarch-mipscompiler/runtimehelp wanted

#58466 opened 2 years ago by ianlancetaylor

typechecker Go version and build-constraints Go version disagreeNeedsInvestigationcompiler/runtime

#58342 opened 2 years ago by LukeShu

poor register allocation with PGONeedsInvestigationcompiler/runtime

#58298 opened 2 years ago by Deleplace

multiple performance regressions due to CL 270940, 448036, or 454036NeedsInvestigationcompiler/runtime

#58166 opened 2 years ago by prattmic

PGO compiler diagnosticsNeedsInvestigationcompiler/runtime

#58153 opened 2 years ago by prattmic

add test for PGO profiles merged from profiles with different source versionsNeedsDecisionTestingcompiler/runtime

#58101 opened 2 years ago by prattmic

deduplicate wrappers for promoted methodsNeedsInvestigationcompiler/runtime

#57916 opened 2 years ago by mdempsky

os.Stdout.Write causes its argument to escape on WindowsNeedsInvestigationOS-WindowsPerformancecompiler/runtime

#57740 opened 2 years ago by ALTree

performance regression in 1.20NeedsInvestigationPerformancecompiler/runtime

#57505 opened 2 years ago by changkun

shouldn't report argument mismatch errors for using unexported functionsNeedsInvestigationcompiler/runtime

#57489 opened 2 years ago by ross-spencer

avoid memclr for provable overwritten slicesNeedsInvestigationPerformancecompiler/runtime

#57153 opened 2 years ago by dsnet

statically remove type switch in instantiated generic codeNeedsInvestigationPerformancecompiler/runtime

#57072 opened 2 years ago by dsnet

optimize reflect.Value.Set with short-lived ValuesNeedsInvestigationPerformancecompiler/runtime

#57060 opened 2 years ago by dsnet

For some sizes, zeroing memory through OpZero could be faster (AMD64)NeedsDecisioncompiler/runtime

#56997 opened 2 years ago by jake-ciolek

AMD64 and i386 conditional suffixes of Ops are inconsistent NeedsInvestigationcompiler/runtime

#56722 opened 2 years ago by Jorropo

objects emit generic instantiations for imported packagesNeedsFixcompiler/runtime

#56718 opened 2 years ago by rsc

the Go compiler uses a hack to pretend it has a large startup heapNeedsInvestigationcompiler/runtime

#56546 opened 2 years ago by dr2chase

optimize append with string concatenationNeedsInvestigationPerformancecompiler/runtime

#56442 opened 2 years ago by dsnet

"internal compiler error: NewBulk too big" while running a program with dlvNeedsInvestigationcompiler/runtime

#56120 opened 2 years ago by sufiyan-techp

wrong type reported for generic cyclic interfaceNeedsInvestigationcompiler/runtime

#56046 opened 2 years ago by griesemer

panic for cyclic generic interfacesNeedsInvestigationcompiler/runtime

#56045 opened 2 years ago by griesemer

cleanup the extra "func" in closure nameNeedsFixcompiler/runtime

#55980 opened 2 years ago by cuonglm

OpInlMark can get removed by SSA dead code elimination, resulting in invalid inlining treesNeedsFixcompiler/runtimehelp wanted

#54625 opened 2 years ago by mdempsky

elide unnecessary copiesNeedsInvestigationPerformancecompiler/runtime

#54613 opened 2 years ago by dominikh

missed optimization when using verbose array initializationNeedsInvestigationPerformancecompiler/runtime

#54612 opened 2 years ago by dominikh

windows/amd64 invalid binary when allocating array near symbol size limitNeedsInvestigationOS-Windowscompiler/runtime

#54564 opened 2 years ago by argusdusty

possible append inside a method escape analysis optimizationNeedsInvestigationcompiler/runtime

#54563 opened 2 years ago by mateusz834

prove should be taught about the bounds of (i+j)/2NeedsFixPerformancecompiler/runtime

#54544 opened 2 years ago by mvdan

design doc explaining unified IR implementationcompiler/runtime

#54534 opened 2 years ago by mdempsky

generic method values behave differently than specific onesNeedsInvestigationcompiler/runtime

#54447 opened 2 years ago by mdempsky

checkEnabled causes some debug lines tests to failNeedsInvestigationcompiler/runtime

#54029 opened 2 years ago by randall77

suboptimal cloning/optimization in slices.CloneNeedsDecisionPerformancecompiler/runtime

#53643 opened 2 years ago by ainar-g

reduce unnecessary register copies in regallocNeedsInvestigationPerformancecompiler/runtime

#53599 opened 2 years ago by erifan

inlining confuses escape analysis with interface{} paramsNeedsInvestigationPerformancecompiler/runtime

#53465 opened 2 years ago by mvdan

jump tables perform much worse on AMD zen3?NeedsInvestigationPerformancecompiler/runtime

#53331 opened 2 years ago by dsnet

opt should match rules through phisNeedsInvestigationPerformancecompiler/runtime

#53300 opened 2 years ago by Jorropo

SIGILL on `linux-loong64-3a5000`NeedsInvestigationarch-loong64compiler/runtime

#53093 opened 2 years ago by bcmills

slowdown in location list generation, possible remediesNeedsDecisionToolSpeedcompiler/runtime

#52975 opened 2 years ago by dr2chase

replace uses of ir.Node with ir.Expr or ir.Stmt where appropriateNeedsDecisioncompiler/runtime

#52731 opened 2 years ago by mdempsky

SIGSEGV on netbsd-arm64-bsiegert during bootstrappingNeedsInvestigationOS-NetBSDarch-arm64compiler/runtime

#52678 opened 2 years ago by bcmills

SIGILL when cross-compiling from netbsd/arm64 to linux/mipsNeedsInvestigationOS-NetBSDarch-arm64compiler/runtime

#52651 opened 2 years ago by bcmills

Support `make jobserver` for dynamic negotiable concurreny during compilationNeedsInvestigationcompiler/runtimehelp wanted

#52387 opened 2 years ago by kunaltyagi

optimize struct reset logicNeedsInvestigationPerformancecompiler/runtime

#52373 opened 2 years ago by dsnet

under what circumstances does 1.18 generate significantly larger binaries than 1.17 when compiling the same source code?NeedsInvestigationcompiler/runtime

#52270 opened 2 years ago by adriancable

generate dwarf type info in compilerNeedsInvestigation

#52209 opened 2 years ago by zhouguangyuan0718

defer of embedded method resolves pointer too earlyNeedsInvestigationcompiler/runtime

#52025 opened 2 years ago by ianlancetaylor

slow with many methods on parameterized typeNeedsInvestigationcompiler/runtime

#51957 opened 2 years ago by seborama

confusing error when trying to instantiate type parameter on other-package constraint with unexported fieldsNeedsDecisioncompiler/runtime

#51942 opened 2 years ago by ALTree

global vars initialized with func calls like net.IPv4 allocate at init timeNeedsInvestigationPerformancecompiler/runtime

#51773 opened 2 years ago by mvdan

missed devirtualizationNeedsInvestigationPerformancecompiler/runtime

#51554 opened 2 years ago by CAFxX

optimize channel filling idiomNeedsDecisionPerformancecompiler/runtime

#51553 opened 2 years ago by CAFxX

suggest clearer error regarding when a non-pointer type cannot be used as type parameterNeedsInvestigationcompiler/runtime

#51515 opened 2 years ago by changkun

self assigned append should not escapeNeedsInvestigationPerformancecompiler/runtime

#51462 opened 2 years ago by dsnet

better escape analysis for net.SyscallConnNeedsInvestigation

#51334 opened 2 years ago by rsc

add unrolling stage for automatic loop unrollingNeedsInvestigationPerformance

#51302 opened 2 years ago by vpachkov

improve error messages when go version is too low NeedsInvestigationcompiler/runtime

#51270 opened 2 years ago by feliixx

"invalid type loop" depending on declaration orderNeedsFixearly-in-cycle

#51244 opened 2 years ago by mdempsky

require build systems to specify -importcfgProposalProposal-Acceptedcompiler/runtime

#51225 opened 2 years ago by mdempsky

optimize convI2I, assertI2I, assertE2I for statically known typesNeedsInvestigationPerformancecompiler/runtime

#51133 opened 2 years ago by quasilyte

missing DWARF location lists for return valuesNeedsInvestigationcompiler/runtime

#50990 opened 2 years ago by michael-obermueller

consider to add move-like optimization for some string<->[]byte operationsFeatureRequestNeedsInvestigationcompiler/runtime

#50846 opened 2 years ago by quasilyte

adjustment needed for conversion rules for pointer conversions (?)NeedsDecisiongenerics

#50815 opened 2 years ago by keep94

SIGSEGV on openbsd-arm64-jsing builderNeedsInvestigationOS-OpenBSDarch-arm64compiler/runtime

#50452 opened 2 years ago by bcmills

long symbol names for instantiated generics => large object files (though not executables)NeedsInvestigationcompiler/runtimegenerics

#50438 opened 2 years ago by csgura

some subsequent bounds checks are not eliminatedNeedsInvestigationPerformancecompiler/runtime

#50365 opened 2 years ago by tdakkota

optimize dead storeNeedsInvestigationPerformancecompiler/runtime

#50325 opened 2 years ago by katsusan

generic code compile never endNeedsInvestigationcompiler/runtime

#50204 opened 2 years ago by csgura

wrong line number in error messageNeedsInvestigationcompiler/runtime

#50133 opened 2 years ago by zigo101

simplify multiplication and division of Abs() NeedsDecisionPerformancecompiler/runtime

#50126 opened 2 years ago by Jacalz

“dumb” slice zeroing is faster than “normal” onesNeedsFixPerformance

#49997 opened 3 years ago by ainar-g

strange performance difference between two implementationsNeedsInvestigationPerformancecompiler/runtime

#49785 opened 3 years ago by zigo101

defer wrapper has more instructions than hand-written wrapperNeedsDecisioncompiler/runtime

#49656 opened 3 years ago by codefromthecrypt

compiler/inliner leads to suboptimal register usageNeedsInvestigationPerformancecompiler/runtime

#49634 opened 3 years ago by holiman

introduce growbyteslice?NeedsInvestigationcompiler/runtime

#49480 opened 3 years ago by quasilyte

mark CSE'd loads as rematerializableNeedsInvestigationPerformancecompiler/runtime

#49332 opened 3 years ago by josharian

reorganize associative computation to allow superscalar executionNeedsInvestigationPerformancecompiler/runtime

#49331 opened 3 years ago by josharian

initialization order within a file appears to have changedNeedsInvestigationcompiler/runtime

#49150 opened 3 years ago by cosnicolaou

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

#49113 opened 3 years ago by jake-ciolek

fuzzing triggers various crashes or internal compiler errors on tipNeedsFixcompiler/runtime

#49019 opened 3 years ago by thepudds

inefficient assembly code generated by simple loop&branch codeNeedsFixPerformance

#48882 opened 3 years ago by flypig

generic function argument causes escape to heapNeedsInvestigationPerformancecompiler/runtimegenerics

#48849 opened 3 years ago by bboreham

utf8.EncodeRune has different performance from the equivalent string conversionNeedsInvestigationPerformancecompiler/runtime

#48684 opened 3 years ago by bcmills

worse performance looping through arrays identifiable at compile timeNeedsInvestigationPerformancecompiler/runtime

#48637 opened 3 years ago by seebs

assignment error messagesNeedsInvestigationcompiler/runtime

#48585 opened 3 years ago by griesemer

bad line number assigned to instruction loading value into argument registerNeedsFixcompiler/runtime

#48546 opened 3 years ago by aarzilli

inline-able function with named results performs worseNeedsInvestigationPerformancecompiler/runtime

#48507 opened 3 years ago by zigo101

let cmd/compile choose how much concurrency to useNeedsInvestigationToolSpeedcompiler/runtime

#48497 opened 3 years ago by bcmills

add reverse proof to prove pass?NeedsDecisioncompiler/runtime

#48469 opened 3 years ago by JAicewizard

DWARF Incorrect slice lenNeedsInvestigationcompiler/runtime

#48405 opened 3 years ago by mahdi-hm

avoid repeated write barrier checksNeedsInvestigationPerformancecompiler/runtime

#48245 opened 3 years ago by CAFxX

Load optimization suboptimalNeedsInvestigationPerformancecompiler/runtime

#48222 opened 3 years ago by klauspost

cannot elim binary search typeHash on a type switch for a known typeNeedsInvestigationPerformancecompiler/runtime

#48220 opened 3 years ago by wdvxdr1123

add VBIC, VMVN instructions for ARMv8NeedsInvestigationarch-arm64compiler/runtime

#48199 opened 3 years ago by ericlagergren

inline functions with only an error wrapperNeedsInvestigationPerformancecompiler/runtime

#48192 opened 3 years ago by dsnet

parser rejects unambiguous unparenthesized TypeName composite literals in Condition expression of ForClauseNeedsDecisioncompiler/runtime

#48159 opened 3 years ago by mdempsky

reduce binary space used for register spillingNeedsInvestigationbinary-sizecompiler/runtime

#47970 opened 3 years ago by martisch

shorter slicing instruction sequence on x86/amd64NeedsInvestigationPerformancebinary-sizecompiler/runtime

#47969 opened 3 years ago by martisch

deduplicate alg and noalg type descriptors to allow binary space optimizationsNeedsDecisionbinary-sizecompiler/runtime

#47904 opened 3 years ago by martisch

can not compile large functionNeedsInvestigationcompiler/runtime

#47866 opened 3 years ago by mattn

DWARF Incorrect location listNeedsInvestigationcompiler/runtime

#47850 opened 3 years ago by mahdi-hm

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

#47524 opened 3 years ago by renthraysk

optimize append([]byte(string), ...) to avoid a duplicationNeedsInvestigationPerformancecompiler/runtime

#47454 opened 3 years ago by zigo101

large slice literals allocated in stack, causing very big frameNeedsFixcompiler/runtime

#47197 opened 3 years ago by zigo101

tight code optimization opportunitiesNeedsInvestigationPerformancecompiler/runtime

#47120 opened 3 years ago by rsc

eliminate redundant zeroing after lower passNeedsInvestigationPerformancecompiler/runtime

#47107 opened 3 years ago by tdakkota

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

#47089 opened 3 years ago by gazerro

unclear error message on initialization loop and invalid parameter typeNeedsFix

#47059 opened 3 years ago by gazerro

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

#47045 opened 3 years ago by mdempsky

missed phi elim opportunity using result of function callFeatureRequestNeedsInvestigationToolSpeedcompiler/runtime

#47023 opened 3 years ago by josharian

inappropriate suggested token in case of syntax error in "if" statementNeedsInvestigationcompiler/runtime

#47013 opened 3 years ago by gazerro

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

#46850 opened 3 years ago by laboger

Optimise branches that could be behind other branches, to avoid running those branches when known to be falseNeedsInvestigationPerformancecompiler/runtime

#46711 opened 3 years ago by JAicewizard

no debug information emitted for type used only as initializerNeedsInvestigationcompiler/runtime

#46670 opened 3 years ago by heschi

explore optimizations for fixed-length array copiesNeedsInvestigationPerformance

#46529 opened 3 years ago by mdempsky

MTFT benchmark performance regression with register ABINeedsInvestigationPerformance

#46216 opened 3 years ago by dr2chase

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

#46135 opened 3 years ago by bcmills

allocate slices lazilyNeedsInvestigationPerformance

#46114 opened 3 years ago by bemasc

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

#46079 opened 3 years ago by zigo101

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

#46074 opened 3 years ago by mdempsky

optimize program running speed NeedsInvestigationcompiler/runtime

#46030 opened 3 years ago by aimuz

investigate maintaining TOC register r2 for ppc64x by default.NeedsInvestigationarch-ppc64xcompiler/runtime

#45925 opened 3 years ago by laboger

DWARF IsStmt flag not set for line although it is executedDebuggingNeedsInvestigationcompiler/runtime

#45680 opened 3 years ago by mahdi-hm

unnecessary slice literal zeroingNeedsFixPerformancecompiler/runtime

#45573 opened 3 years ago by icholy

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

#45494 opened 3 years ago by zephyrtronium

emitted DWARF location for complex128 param is incorrectNeedsInvestigationcompiler/runtime

#45281 opened 3 years ago by thanm

inaccurate escape to heap messageNeedsInvestigationcompiler/runtime

#45269 opened 3 years ago by zigo101

bounds check not eliminatedNeedsFixcompiler/runtime

#45078 opened 3 years ago by rsc

map lookup with result of inlined method cannot use fast pathNeedsDecisionPerformance

#44898 opened 3 years ago by rogpeppe

pass pointer-shaped receivers using context registerNeedsDecisionPerformancebinary-sizecompiler/runtime

#44827 opened 3 years ago by mdempsky

match Aux/AuxInt more strictly in rewriting rulesNeedsDecisioncompiler/runtime

#44824 opened 3 years ago by cherrymui

register ABI bringup testcase failures (tracking issue)NeedsInvestigationcompiler/runtimeumbrella

#44816 opened 3 years ago by thanm

regalloc fails to reserve key register (CX) for future codeNeedsInvestigationPerformancecompiler/runtime

#44671 opened 3 years ago by josharian

unnecessary copy in regallocNeedsInvestigationPerformancecompiler/runtime

#44670 opened 3 years ago by josharian

avoid unnecessary allocations for consecutive appendsNeedsInvestigationPerformancecompiler/runtime

#44628 opened 3 years ago by rogpeppe

open-coded defers keep pointer arguments alive past the deferred callNeedsFixcompiler/runtime

#44623 opened 3 years ago by mdempsky

optimize maps with bool keysNeedsInvestigationPerformance

#44578 opened 3 years ago by zigo101

imperfect compile error messageNeedsInvestigationcompiler/runtime

#44321 opened 3 years ago by zigo101

recommend fix when "method has pointer receiver"NeedsDecisioncompiler/runtime

#44201 opened 3 years ago by kstenerud

consider increasing the internal precision limit for integer valuesNeedsDecisioncompiler/runtime

#44057 opened 3 years ago by griesemer

avoidable construction of stack objectsFeatureRequestNeedsFixcompiler/runtime

#43753 opened 3 years ago by mdempsky

better escape analysis of `[]byte` -> `string` conversionsFeatureRequestNeedsFixPerformancecompiler/runtime

#43752 opened 3 years ago by mdempsky

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

#43673 opened 3 years ago by mprobst

better optimization/inlining for sort.SearchFeatureRequestNeedsFixPerformancecompiler/runtime

#43423 opened 3 years ago by yangwenmai

constant indexing to private array should be foldedNeedsFixPerformancecompiler/runtime

#43403 opened 3 years ago by egonelbre

inefficient assembly code on arm64NeedsInvestigationPerformancearch-arm64compiler/runtime

#43357 opened 3 years ago by fkuehnel

missed opportunity to coalesce loads that compare with constantsNeedsInvestigationPerformancecompiler/runtime

#43248 opened 3 years ago by josharian

suboptimal arm64 outputNeedsDecisionPerformancearch-arm64compiler/runtime

#43145 opened 4 years ago by FiloSottile

interaction between sync/atomic, -race and go:noraceNeedsDecisioncompiler/runtime

#43007 opened 4 years ago by dvyukov

inlined err check elimination opportunityNeedsInvestigationPerformancecompiler/runtime

#42999 opened 4 years ago by egonelbre

-race does not obey go:nocheckptrNeedsInvestigationcompiler/runtime

#42880 opened 4 years ago by chewxy

function argument value escapes no matter the run-time conditionNeedsInvestigationcompiler/runtime

#42781 opened 4 years ago by Julio-Guerra

missed add+load combination opportunityNeedsInvestigationPerformancecompiler/runtime

#42672 opened 4 years ago by randall77

notice when function variables are never reassigned, avoid indirect callsNeedsInvestigationPerformancecompiler/runtime

#42569 opened 4 years ago by bradfitz

unneeded panicshift for bounded shift amountNeedsInvestigationPerformancecompiler/runtime

#42179 opened 4 years ago by CAFxX

escape analysis for backing arraysNeedsInvestigation

#42165 opened 4 years ago by snadrus

implicit allocations allowed in the runtimeFeatureRequestNeedsInvestigationcompiler/runtime

#42158 opened 4 years ago by randall77

inconsistent error message when identifier begins with invalid characterNeedsInvestigationcompiler/runtime

#42114 opened 4 years ago by smasher164

negative shift check with trailing zerosNeedsInvestigationPerformancecompiler/runtime

#42094 opened 4 years ago by niaow

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

#41776 opened 4 years ago by josharian

introduce masked memeqNeedsInvestigationPerformancecompiler/runtime

#41774 opened 4 years ago by josharian

checking pointers for nilness inside a loopNeedsInvestigationPerformancecompiler/runtime

#41666 opened 4 years ago by seebs

missing BCE case NeedsInvestigationcompiler/runtime

#41335 opened 4 years ago by choleraehyq

rewrite sequences of mutex callsNeedsInvestigationcompiler/runtime

#41253 opened 4 years ago by CAFxX

optimize redundant iface->iface type assertionsNeedsInvestigationPerformancecompiler/runtime

#41174 opened 4 years ago by quasilyte

don't compile some unexported, inlined functionsNeedsInvestigationToolSpeedcompiler/runtimehelp wanted

#41117 opened 4 years ago by josharian

some missing BCE casesNeedsInvestigationPerformancecompiler/runtime

#40987 opened 4 years ago by zigo101

switch to a register-based calling convention for Go functionsProposalProposal-Acceptedcompiler/runtime

#40724 opened 4 years ago by aclements

280

-d=checkptr should provide more details when reporting about conversions that straddle multiple allocationsNeedsInvestigationcompiler/runtime

#40639 opened 4 years ago by seebs

combine phielim and copyelim into a single pass?NeedsInvestigationcompiler/runtime

#40610 opened 4 years ago by surechen

unnecessary nil pointer checkNeedsInvestigationPerformancecompiler/runtime

#40108 opened 4 years ago by randall77

type inference could be less strict when there are interface argumentsNeedsDecisionTypeInference

#40055 opened 4 years ago by rogpeppe

reclaim binary size increase from CL 35554 constant to interface allocation optimizationsNeedsInvestigationPerformancecompiler/runtime

#40039 opened 4 years ago by thepudds

create cheapdeadcodeNeedsInvestigationPerformanceToolSpeedcompiler/runtime

#39918 opened 4 years ago by josharian

panic: runtime error: floating point error when building on FreeBSD armv6 on RPi-BNeedsInvestigationOS-FreeBSDarch-armcompiler/runtime

#39816 opened 4 years ago by seasox

unnecessary bounds check in a loop passed as a closureNeedsInvestigationPerformancecompiler/runtime

#39756 opened 4 years ago by jordanlewis

optimize xor to complementNeedsInvestigationPerformancecompiler/runtime

#39710 opened 4 years ago by niaow

inaccurate DWARF location information -> misleading profileNeedsInvestigationcompiler/runtime

#39667 opened 4 years ago by alandonovan

Allocations leak into outer scopeNeedsInvestigationcompiler/runtime

#39514 opened 4 years ago by holiman

intrinsify bits.RotateLeft32 on mipsleNeedsInvestigationPerformancecompiler/runtime

#39139 opened 4 years ago by assadobaid

generated DWARF triggers objdump warning for large uint64 constNeedsInvestigationcompiler/runtime

#39048 opened 4 years ago by thanm

inconsistent results with gccgoNeedsDecisioncompiler/runtime

#39003 opened 4 years ago by zigo101

Missed opportunity for post-inlining devirtualizationNeedsInvestigationPerformancecompiler/runtime

#38992 opened 4 years ago by alex

package-scope and function-scope types get the same nameNeedsInvestigationcompiler/runtime

#38893 opened 4 years ago by ianlancetaylor

incorrect type error after "type int64 int32"NeedsInvestigationcompiler/runtime

#38882 opened 4 years ago by JohnReedLOL

more compact initialization of maps with dynamic contentNeedsInvestigationbinary-sizecompiler/runtime

#38784 opened 4 years ago by martisch

binaries contain many ..type.eq funcsNeedsInvestigationbinary-sizecompiler/runtime

#38782 opened 4 years ago by bradfitz

arch.MAXWIDTH on amd64 out of date?NeedsInvestigationcompiler/runtime

#38734 opened 4 years ago by mdempsky

experiment with more integer comparison optimizationsNeedsInvestigationPerformancecompiler/runtime

#38721 opened 4 years ago by mundaym

confusing compiler error when using if instead of for with range operator inside anonymous functionNeedsInvestigationcompiler/runtime

#38624 opened 4 years ago by mzimmerman

optimize bits.OnesCount(x) == 1NeedsInvestigationPerformancecompiler/runtime

#38547 opened 4 years ago by josharian

Eliminate bound checks on access to positive moduloNeedsInvestigationPerformancecompiler/runtime

#38476 opened 4 years ago by cbeuw

allow inlining of open-coded defer callsNeedsInvestigationPerformancecompiler/runtime

#38471 opened 4 years ago by prattmic

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

#38419 opened 4 years ago by qmuntal

anonymous structs consume space in binaryNeedsInvestigationbinary-sizecompiler/runtime

#38291 opened 4 years ago by egonelbre

consider extending '-spectre' option to other architecturesNeedsInvestigationSecuritycompiler/runtime

#38066 opened 4 years ago by mundaym

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

#37753 opened 4 years ago by kortschak

avoid unnecessary calls to runtime.panicIndexNeedsInvestigationPerformancecompiler/runtime

#37740 opened 4 years ago by rillig

delete insertLoopReschedChecks?NeedsDecisioncompiler/runtime

#37737 opened 4 years ago by josharian

inlined messaging is unclear when inlining functions from other packagesNeedsInvestigationcompiler/runtime

#37704 opened 4 years ago by snadrus

better append of unmodified slicesNeedsInvestigationPerformancecompiler/runtime

#37694 opened 4 years ago by sylr

__SOURCE__ constant like __FILE__, __LINE__, __FUNCTION__ C++ macroFeatureRequestNeedsInvestigationcompiler/runtime

#37620 opened 4 years ago by kokizzu

use staticuint64sNeedsFixPerformanceSuggestedcompiler/runtimehelp wanted

#37612 opened 4 years ago by josharian

branch elimination opportunites when comparing constantsNeedsInvestigationPerformancecompiler/runtime

#37608 opened 4 years ago by laboger

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

#37600 opened 4 years ago by bcmills

a flaw in algebraic simplification rules inside Go compilerNeedsInvestigationPerformancecompiler/runtime

#37508 opened 4 years ago by true-grue

investigate performance regression vs Go 1.13NeedsInvestigationPerformancecompiler/runtime

#37429 opened 4 years ago by dr2chase

add a way to declare variables in rewrite rulesNeedsInvestigationcompiler/runtime

#37423 opened 4 years ago by josharian

partial cse of phi inputs?NeedsInvestigationPerformancecompiler/runtime

#37415 opened 4 years ago by josharian

optimize small runtime.memequal callsNeedsFixPerformance

#37275 opened 4 years ago by josharian

combine int tests when comparing against a constant stringNeedsFixPerformance

#37274 opened 4 years ago by josharian

error has incorrect column numberNeedsInvestigationcompiler/runtime

#37180 opened 4 years ago by quackenbush

ARM's MOVWnop causes regalloc to insert unnecessary copiesNeedsInvestigationPerformancecompiler/runtime

#37096 opened 4 years ago by josharian

it is not possible to prevent FMA with complex valuesNeedsInvestigationcompiler/runtime

#36971 opened 4 years ago by kortschak

escape analysis on interface callsNeedsInvestigationPerformancecompiler/runtime

#36964 opened 4 years ago by kirillx

possible latent codegen issue on amd64 removing zero extensionsNeedsInvestigationcompiler/runtime

#36897 opened 4 years ago by josharian

prove misses obvious facts about constantsNeedsInvestigationPerformancecompiler/runtime

#36889 opened 4 years ago by josharian

error line number reported is incorrect if it appears after line 0xFFFFFNeedsInvestigationcompiler/runtime

#36850 opened 4 years ago by icza

set prologue_end on every archDebuggingNeedsDecisioncompiler/runtime

#36612 opened 4 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 4 years ago by danscales

decide how to better document -wb write barrier flagDocumentationNeedsDecisioncompiler/runtime

#36597 opened 4 years ago by xaionaro

manually CSE |-combined rules?NeedsInvestigationcompiler/runtime

#36443 opened 4 years ago by josharian

optimize overhead from CPU feature detectionNeedsInvestigationPerformancecompiler/runtime

#36351 opened 4 years ago by smasher164

teach prove about incrementing, len, and overflowNeedsInvestigationPerformancecompiler/runtime

#36346 opened 4 years ago by josharian

Finer grained visibility debug info for variablesDebuggingNeedsInvestigationcompiler/runtime

#36125 opened 5 years ago by aarzilli

minimize stack occupation before function callsNeedsInvestigationcompiler/runtime

#36067 opened 5 years ago by CAFxX

redundant typecheck errors when using map[T]func(Undefined)NeedsInvestigationcompiler/runtime

#36039 opened 5 years ago by mvdan

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

#36017 opened 5 years ago by dennwc

encoded pkg path shown in stack traceNeedsInvestigation

#35558 opened 5 years ago by myitcv

export non-integer constants to debug infoDebuggingNeedsInvestigationcompiler/runtime

#35527 opened 5 years ago by dlsniper

infinite loop in -m=2NeedsFix

#35518 opened 5 years ago by mdempsky

no closure inlining even in the simple case?NeedsInvestigationPerformancecompiler/runtime

#35196 opened 5 years ago by ivoras

minimally align variables in memory when -d=checkptr is usedNeedsInvestigationcompiler/runtimehelp wanted

#35128 opened 5 years ago by mdempsky

review compiler-generated symbol naming schemeNeedsInvestigationcompiler/runtimehelp wanted

#35088 opened 5 years ago by mdempsky

expected "not used" errorNeedsInvestigationcompiler/runtime

#35021 opened 5 years ago by serhatgiydiren

consider flagging ops that should not be moved between blocksNeedsInvestigationcompiler/runtime

#34950 opened 5 years ago by mundaym

unneeded bounds checksNeedsInvestigationPerformancecompiler/runtime

#34816 opened 5 years ago by mariecurried

inline functions that are called only onceNeedsDecisionPerformancecompiler/runtime

#34525 opened 5 years ago by mariecurried

use hashing for switch statementsNeedsInvestigationcompiler/runtimehelp wanted

#34381 opened 5 years ago by mdempsky

output a DW_LNE_end_sequence instruction at the end of every function's line tableNeedsInvestigationcompiler/runtime

#34380 opened 5 years ago by jeremyfaller

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

#34138 opened 5 years ago by tumdum

optimize conditional pointer assignmentNeedsDecisionPerformancecompiler/runtime

#34020 opened 5 years ago by mariecurried

does not check go:writebarrierrec for print functionsNeedsInvestigationcompiler/runtime

#34014 opened 5 years ago by ianlancetaylor

taking address of variables in chain breaks optimizationsNeedsInvestigationPerformancecompiler/runtime

#33972 opened 5 years ago by mariecurried

reflected methods have extra wrappingNeedsInvestigationcompiler/runtime

#33641 opened 5 years ago by seebs

mention shadowing of predeclared identifiers in errors they causeNeedsFixhelp wanted

#33567 opened 5 years ago by seebs

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

#33442 opened 5 years ago by nsajko

'internal compiler error: bvbulkalloc too big' when compiling a file containing a large mapNeedsInvestigationcompiler/runtime

#33437 opened 5 years ago by mcdee

review "expected expression" error messagesNeedsInvestigationcompiler/runtime

#33415 opened 5 years ago by griesemer

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

#33349 opened 5 years ago by renthraysk

malformed DWARF ranges (child not contained in parent)DebuggingNeedsFix

#33188 opened 5 years ago by thanm

suboptimal code generated for simple integer comparison if-blockNeedsInvestigationPerformancecompiler/runtime

#33012 opened 5 years ago by tstanev

superfluous MOV instructionsNeedsInvestigationPerformancecompiler/runtime

#32969 opened 5 years ago by dsnet

ineffective branch caused by deferNeedsInvestigationcompiler/runtime

#32930 opened 5 years ago by mariecurried

-m output is missing escape informationNeedsInvestigation

#32850 opened 5 years ago by FiloSottile

debugger jumps around declarationsNeedsInvestigationcompiler/runtime

#32786 opened 5 years ago by dlsniper

similar returns not optimizedNeedsFixPerformancecompiler/runtime

#32554 opened 5 years ago by mariecurried

prove pass unable to eliminate bounds check when a variable is assigned from lenNeedsInvestigationPerformancecompiler/runtime

#32515 opened 5 years ago by agnivade

slice hint seems to perform better than loop bound checkNeedsInvestigationPerformancecompiler/runtime

#32492 opened 5 years ago by agnivade

prefer to cheaply re-materialize after call site instead of spillingNeedsInvestigationPerformancecompiler/runtime

#32255 opened 5 years ago by martisch

inlining mark elimination is fragileNeedsInvestigationcompiler/runtime

#32069 opened 5 years ago by josharian

optimize sparse line numberingNeedsInvestigationToolSpeedcompiler/runtime

#32046 opened 5 years ago by josharian

use slicebytetostringtmp in concatenationNeedsFixPerformancecompiler/runtime

#31993 opened 5 years ago by dvyukov

suboptimal assembly for a + b + 1NeedsInvestigationPerformancecompiler/runtime

#31900 opened 5 years ago by josharian

utf8.DecodeRune should be fast/slow-path inlineableNeedsFixPerformancecompiler/runtime

#31666 opened 5 years ago by josharian

more fine-grained mechanism for escape analysis of assembly functionsNeedsFixcompiler/runtime

#31525 opened 5 years ago by mdempsky

run escape analysis on SSA formNeedsInvestigationcompiler/runtime

#31501 opened 5 years ago by mdempsky

additional internal debugging support for escape.goNeedsInvestigationcompiler/runtime

#31489 opened 5 years ago by mdempsky

ssa debug does not regenerate/update ssa.htmlNeedsInvestigation

#31290 opened 5 years ago by cuonglm

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

#31265 opened 5 years ago by mundaym

add line numbers for function exit paths?DebuggingNeedsInvestigationcompiler/runtime

#31199 opened 5 years ago by josharian

unexpected difference in compiled code for returned arrayNeedsInvestigationbinary-sizecompiler/runtime

#31198 opened 5 years ago by mariecurried

reduce function prologue overheadNeedsInvestigationPerformancecompiler/runtime

#31193 opened 5 years ago by aclements

internal compiler error: Type.Elem UNSAFEPTRNeedsInvestigationcompiler/runtime

#31174 opened 5 years ago by kirillDanshin

keep variable declaration order in debug_infoDebuggingNeedsInvestigationcompiler/runtime

#31133 opened 5 years ago by dlsniper

pack structs containing anonymous fields more tightlyNeedsInvestigationPerformancecompiler/runtime

#31047 opened 5 years ago by josharian

runtime check for availability of popcount is spammyNeedsInvestigationPerformancecompiler/runtime

#30946 opened 5 years ago by seebs

bounds checking for unrolled loops is weirdNeedsInvestigationPerformancecompiler/runtime

#30945 opened 5 years ago by seebs

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

#30818 opened 5 years ago by josharian

add consistency check that local variables are associated with CurfnNeedsInvestigationcompiler/runtime

#30754 opened 5 years ago by mdempsky

investigate wasm sync inliningNeedsInvestigationPerformancearch-wasmcompiler/runtime

#30605 opened 5 years ago by bradfitz

provide flags to request just inlining or just escape analysis infoNeedsInvestigationcompiler/runtime

#30585 opened 5 years ago by josharian

teach prove about minNeedsFixPerformancecompiler/runtime

#30584 opened 5 years ago by josharian

mid-stack inline dispatch functions that call a function on each pathNeedsInvestigationPerformancecompiler/runtime

#30548 opened 5 years ago by josharian

unnecessary bounds check for global slicesNeedsInvestigationPerformancecompiler/runtime

#30529 opened 5 years ago by dsnet

unnecessary hash/eq functions for global arraysNeedsInvestigationPerformancecompiler/runtime

#30528 opened 5 years ago by dsnet

elide call to runtime.growslice with provable capacity availabilityNeedsInvestigationPerformancebinary-sizecompiler/runtime

#30509 opened 5 years ago by dsnet

clean up recent fix for ginsop2 on ppc64xNeedsFixcompiler/runtime

#30475 opened 5 years ago by laboger

unnecessary hash/eq functions for slice literalsNeedsInvestigationToolSpeedbinary-sizecompiler/runtime

#30449 opened 5 years ago by neild

'_rt0_amd64_windows_lib' is not called when linking with VS2015NeedsInvestigationcompiler/runtime

#30347 opened 5 years ago by andreas-jonsson

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

#30077 opened 5 years ago by udhos

add a README section on developing the compilerDocumentationNeedsInvestigationcompiler/runtime

#30074 opened 5 years ago by mvdan

variable read should not be optimized when using -gcflags="all=-N -l"DebuggingNeedsFixcompiler/runtime

#29977 opened 5 years ago by dlsniper

unnecessary bounds checkNeedsInvestigationPerformancehelp wanted

#29872 opened 5 years ago by mariecurried

misleading panic on deferred funcNeedsInvestigationcompiler/runtime

#29797 opened 5 years ago by dsymonds

eliminate memory allocation for non-int n in slice extension idiomNeedsFixPerformancecompiler/runtime

#29785 opened 5 years ago by valyala

optimize CAS loopsNeedsInvestigationPerformancecompiler/runtime

#29716 opened 5 years ago by CAFxX

use memmove to initialize non-global static dataNeedsFixPerformancecompiler/runtime

#29693 opened 5 years ago by josharian

implement global new(T) without calling newobjectNeedsFixPerformancecompiler/runtime

#29691 opened 5 years ago by josharian

reuse boxed primitive in slice literals of interfacesNeedsInvestigationPerformance

#29574 opened 5 years ago by dsnet

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

#29571 opened 5 years ago by laboger

simplify converting a Go function to buildable Go assemblyFeatureRequestNeedsDecisioncompiler/runtime

#29538 opened 5 years ago by mvdan

make argument size of -S output more accurateNeedsFixcompiler/runtime

#29334 opened 6 years ago by mmcloughlin

use bit tests for binary search in type switchesPerformancecompiler/runtime

#29292 opened 6 years ago by josharian

improve interface dispatch performanceNeedsInvestigationPerformancecompiler/runtime

#29276 opened 6 years ago by robaho

optimize variables in function calls as equivalent to constant-derived variablesNeedsInvestigationPerformancecompiler/runtime

#29166 opened 6 years ago by notimesea

compiler hangs without optimizationsNeedsInvestigationToolSpeedcompiler/runtime

#29144 opened 6 years ago by csnitker

better const-based optimizations handling in compiler frontendPerformancecompiler/runtime

#29095 opened 6 years ago by quasilyte

specialize variadic functionsPerformancecompiler/runtime

#29085 opened 6 years ago by josharian

statictmps can prevent heap objects from being collectedGarbageCollectorcompiler/runtime

#29068 opened 6 years ago by randall77

minimize morestack calls text footprintNeedsInvestigationcompiler/runtime

#29067 opened 6 years ago by CAFxX

initialization optimization fails when using -ldflags=-X=VALNeedsFixcompiler/runtime

#28969 opened 6 years ago by tjamet

consider teaching prove about unexported integer fieldsPerformancecompiler/runtime

#28952 opened 6 years ago by mvdan

BCE is better with reslicing than index variablesPerformancecompiler/runtime

#28942 opened 6 years ago by mvdan

teach prove about slice expressionsPerformancecompiler/runtime

#28941 opened 6 years ago by mvdan

fuse constant comparison with division by a constantPerformancecompiler/runtime

#28861 opened 6 years ago by benshi001

refine calcHasCall's handling of ODIV and OMODNeedsFixSuggestedcompiler/runtime

#28698 opened 6 years ago by josharian

various low level x86 instruction generation improvementsNeedsInvestigationPerformanceSuggestedcompiler/runtimehelp wanted

#28671 opened 6 years ago by martisch

reduce generated algs for compiler created array typesNeedsInvestigationPerformancecompiler/runtime

#28639 opened 6 years ago by martisch

thread support for webassemblyFeatureRequestNeedsDecisionarch-wasmcompiler/runtime

#28631 opened 6 years ago by sleagon

liveness analysis conservative for compound objectsGarbageCollectorcompiler/runtime

#28626 opened 6 years ago by randall77

can't break on inlined functionNeedsInvestigationcompiler/runtime

#28603 opened 6 years ago by aclements

cleanup compiler flag processingNeedsFixSuggestedcompiler/runtime

#28570 opened 6 years ago by griesemer

the DW_AT_location of the return value is empty when its name is not specifiedDebuggingNeedsFixcompiler/runtime

#28416 opened 6 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 6 years ago by deanveloper

recognize rand.Intn() is bounded for BCEPerformancecompiler/runtime

#28314 opened 6 years ago by mariecurried

add column info to export dataNeedsFixcompiler/runtime

#28259 opened 6 years ago by alandonovan

clearer error message for unkeyed composite literal with unexported fieldNeedsFixhelp wanted

#28053 opened 6 years ago by pjebs

optimize field access after type assertionPerformancecompiler/runtime

#28045 opened 6 years ago by rillig

unexpected performance difference accessing slices with different capsNeedsFixPerformancecompiler/runtime

#27857 opened 6 years ago by iand

string concatenation specializations for performanceNeedsInvestigationPerformancecompiler/runtime

#27801 opened 6 years ago by quasilyte

detect and apply more CMOV optimizationsNeedsInvestigationPerformancecompiler/runtime

#27780 opened 6 years ago by agnivade

automatically stack-allocate small non-escaping slices of dynamic sizeNeedsInvestigationPerformancecompiler/runtime

#27625 opened 6 years ago by rasky

BCE optimizes less for string than sliceNeedsInvestigationPerformancecompiler/runtime

#27585 opened 6 years ago by zigo101

eliminate unnecessary extend-of-truncate calculations in prove passNeedsInvestigationPerformancecompiler/runtime

#27572 opened 6 years ago by josharian

pointers passed to cgo escape to the heapNeedsInvestigationcompiler/runtime

#27538 opened 6 years ago by FiloSottile

autotemps can make stack frame too largeNeedsFixcompiler/runtime

#27447 opened 6 years ago by randall77

mipsle: running error SIGILL: illegal instructionNeedsInvestigation

#27236 opened 6 years ago by wumao

understand Go vs assembly rc4 resultsNeedsInvestigationPerformancecompiler/runtime

#27184 opened 6 years ago by bradfitz

rename a bunch of thingscompiler/runtime

#27167 opened 6 years ago by josharian

optimise ranges over string(byteSlice)NeedsInvestigationPerformancecompiler/runtime

#27148 opened 6 years ago by mvdan

Fannkuch benchmark performance regressionNeedsInvestigationPerformancecompiler/runtime

#27108 opened 6 years ago by kklobe

split up SSA rewrite passescompiler/runtime

#27034 opened 6 years ago by mundaym

provide parameter escape information in DWARFDebuggingcompiler/runtime

#27007 opened 6 years ago by heschi

recognize map-copy with range idiomNeedsInvestigationPerformancecompiler/runtime

#26951 opened 6 years ago by martisch

pack info into low bits of interface type pointersNeedsDecisionPerformancecompiler/runtime

#26680 opened 6 years ago by josharian

optimise away deferred calls to empty functionsNeedsFixPerformancehelp wanted

#26534 opened 6 years ago by ainar-g

constant string -> []byte and []byte -> string conversions aren't constant foldedNeedsInvestigationPerformancecompiler/runtime

#26498 opened 6 years ago by FMNSSun

consider using DWARF 5DebuggingNeedsDecision

#26379 opened 6 years ago by aclements

internal prefix paths leaking into generated DWARFDebuggingNeedsFixcompiler/runtime

#26311 opened 6 years ago by thanm

teach prove about more type conversion operationsNeedsInvestigationPerformancecompiler/runtime

#26299 opened 6 years ago by mvdan

debug info for inlined funcs are sometimes lostDebuggingNeedsInvestigationcompiler/runtime

#26206 opened 6 years ago by hyangah

msan cannot handle structs with paddingNeedsInvestigationcompiler/runtime

#26167 opened 6 years ago by benesch

record and use per-function optimization dataNeedsInvestigationPerformancecompiler/runtime

#25999 opened 6 years ago by josharian

possible missed optimization in append benchmarkNeedsInvestigationPerformancecompiler/runtime

#25916 opened 6 years ago by perillo

merge sequential memory moves into bigger memory movesNeedsInvestigationPerformancecompiler/runtime

#25866 opened 6 years ago by valyala

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

#25862 opened 6 years ago by valyala

combine append callsPerformancecompiler/runtime

#25828 opened 6 years ago by quasilyte

detect divisions that always result in 0NeedsDecisionPerformancecompiler/runtime

#25733 opened 6 years ago by davecheney

inconsistent acceptance of cyclic variable declaration (esoteric)NeedsInvestigationcompiler/runtime

#25677 opened 6 years ago by griesemer

confusing internal error when importing different packages with same name from different pathsNeedsFixcompiler/runtime

#25635 opened 6 years ago by griesemer

revisit statement boundaries CL peformance and binary size impactNeedsInvestigationToolSpeed

#25426 opened 6 years ago by josharian

aggressive IMUL rewrites on AMD64 sometimes lead to performance regressionsNeedsInvestigationPerformancecompiler/runtime

#25358 opened 6 years ago by quasilyte

call memmove on amd64 for large OpMoveNeedsInvestigationPerformancecompiler/runtime

#25317 opened 6 years ago by TocarIP

incorrect error for function conversion based on cyclic definition (esoteric)NeedsInvestigationcompiler/runtime

#25305 opened 6 years ago by griesemer

tweak branchelim heuristic on amd64Performancecompiler/runtime

#25298 opened 6 years ago by TocarIP

BCE/Prove do not take arithmetic into accountNeedsInvestigationcompiler/runtime

#25197 opened 6 years ago by navytux

elide useless type assertionPerformancecompiler/runtime

#25189 opened 6 years ago by dsnet

detect bounded shifts of the form (bits-var) in provePerformancecompiler/runtime

#25169 opened 6 years ago by josharian

detect bounded shifts in generic rulesPerformancecompiler/runtime

#25168 opened 6 years ago by josharian

use bounded shift information on non-amd64 architecturesPerformanceSuggestedcompiler/runtimehelp wanted

#25167 opened 6 years ago by josharian

emit variable byte-sized bit tests on amd64Performancecompiler/runtime

#25156 opened 6 years ago by josharian

eliminate more dead storesPerformancebinary-sizecompiler/runtime

#25132 opened 6 years ago by TocarIP

take into account that floating point special cases (NaN, Inf) are unlikelyPerformancecompiler/runtimehelp wanted

#25125 opened 6 years ago by mundaym

regalloc's liveness analysis is quadraticToolSpeedcompiler/runtime

#25120 opened 6 years ago by josharian

prove pass doesn't draw signed int conclusions from range checksPerformancecompiler/runtime

#25115 opened 6 years ago by josharian

optimize unaligned load-XOR-store on byte slicesPerformancecompiler/runtime

#25111 opened 6 years ago by mundaym

use bounds from prove pass to simplify shiftsPerformancecompiler/runtime

#25087 opened 6 years ago by josharian

add bounds information from non-control ops to prove passPerformancecompiler/runtime

#25086 opened 6 years ago by josharian

sometimes issue rematerializable values earlyPerformancecompiler/runtime

#24930 opened 6 years ago by josharian

avoiding zeroing new allocations when possiblePerformancecompiler/runtime

#24926 opened 6 years ago by josharian

compiler variable folding can break linker's -X optionNeedsInvestigationcompiler/runtime

#24890 opened 6 years ago by simonklb

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

#24876 opened 6 years ago by dgryski

unexpected memequal call in short string comparisonNeedsFixPerformanceSuggestedcompiler/runtimehelp wanted

#24765 opened 6 years ago by bradfitz

incorrect column reported for "struct literal does not implement" errorNeedsFixcompiler/runtime

#24689 opened 6 years ago by dhowden

Fannkuch11 can be speed up by ~ 30% via improving BCENeedsFixPerformancecompiler/runtime

#24660 opened 6 years ago by navytux

eliminate empty switch casesNeedsFixPerformancecompiler/runtime

#24650 opened 6 years ago by josharian

document emitptrargsmap onebitwalktype1 callsDocumentationNeedsFixcompiler/runtime

#24648 opened 6 years ago by josharian

opt: reuse interface payload during interface conversionPerformancecompiler/runtime

#24582 opened 6 years ago by alandonovan

less optimized AMD64 codeNeedsFixPerformancebinary-size

#24537 opened 6 years ago by benshi001

optimize large structsNeedsFixPerformancecompiler/runtime

#24416 opened 6 years ago by randall77

keeping a subset of a struct value's fields is slowPerformancecompiler/runtime

#24386 opened 6 years ago by mvdan

slice update with self subslice - write barrier probably not needed (?)Performancecompiler/runtime

#24314 opened 6 years ago by navytux

esc.go fails to mark anonymous receiver parameters as non-escapingNeedsFixcompiler/runtime

#24305 opened 6 years ago by mdempsky

struct field alive too longNeedsFixcompiler/runtime

#24263 opened 6 years ago by randall77

loop optimizationNeedsInvestigationPerformancecompiler/runtime

#24240 opened 6 years ago by MichaelTJones

revisit append codegenPerformance

#24209 opened 6 years ago by josharian

tighten CFG as well as valuesPerformancecompiler/runtime

#24177 opened 6 years ago by josharian

use runtime.zeroVal for small zero-valued readonly static varsPerformancecompiler/runtime

#23948 opened 6 years ago by josharian

optimize comparison of large values with zeroPerformancecompiler/runtime

#23929 opened 6 years ago by josharian

avoid updating capacity if unusedNeedsFixPerformancecompiler/runtime

#23832 opened 6 years ago by dsnet

bad line number in error message calling variadic functionNeedsFixcompiler/runtime

#23660 opened 6 years ago by josharian

conversion error is a bit inaccuratecompiler/runtime

#23394 opened 6 years ago by hirochachacha

inefficient CALL setup when more than 32bytes of argsPerformancebinary-sizecompiler/runtime

#23377 opened 6 years ago by ALTree

validity of program depends on method declaration ordercompiler/runtime

#23202 opened 7 years ago by griesemer

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

#23065 opened 7 years ago by cramertj

slicing can be improved on ARMPerformancecompiler/runtime

#23006 opened 7 years ago by rasky

eliminate runtime.conv* calls with unused resultsNeedsFixPerformancebinary-size

#22971 opened 7 years ago by pavel

implement powerpc 32-bit backend (ppc32)FeatureRequestcompiler/runtime

#22885 opened 7 years ago by rasky

cannot compile valid (but esoteric) self-recursive interfacecompiler/runtime

#22825 opened 7 years ago by griesemer

reordering struct field accesses can alter performanceNeedsInvestigationPerformancecompiler/runtime

#22479 opened 7 years ago by mvdan

escape analysis loopdepth should reset when blocks endNeedsInvestigationcompiler/runtime

#22438 opened 7 years ago by mdempsky

generate correct DW_AT_external flagDebuggingNeedsFixcompiler/runtime

#22399 opened 7 years ago by thanm

odd inlining heuristic under mid-stack inliningNeedsInvestigationPerformancecompiler/runtime

#22310 opened 7 years ago by mdempsky

consider adding sibling links to generated DWARFDebuggingNeedsInvestigationcompiler/runtime

#22185 opened 7 years ago by thanm

move DWARF go.info.* symbol generation out of the linkerNeedsInvestigationcompiler/runtime

#22094 opened 7 years ago by crawshaw

avoid allocations for some return valuesNeedsInvestigationPerformancecompiler/runtime

#22081 opened 7 years ago by crawshaw

redundant branchPerformancecompiler/runtime

#22025 opened 7 years ago by randall77

don't depend on statictmp_ variables being read onlyNeedsFixcompiler/runtime

#21940 opened 7 years ago by randall77

cleaner solution for exporting linkname infocompiler/runtimeearly-in-cycle

#21936 opened 7 years ago by mdempsky

constant folding math/bits functionsPerformanceSuggestedhelp wanted

#21872 opened 7 years ago by markus-oberhumer

errors involving aliased types should use the alias nameNeedsFixcompiler/runtime

#21866 opened 7 years ago by bcmills

obscure initialization loop error message due to inliningNeedsFixcompiler/runtime

#21750 opened 7 years ago by dvyukov

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

#21735 opened 7 years ago by martisch

optimize away some MOVQconvertsPerformancecompiler/runtime

#21572 opened 7 years ago by josharian

optimize unsigned comparisons with zero/onePerformanceSuggestedcompiler/runtimehelp wanted

#21439 opened 7 years ago by josharian

coalesce consecutive calls to print/printlnNeedsDecisionPerformance

#21417 opened 7 years ago by josharian

improve codegen for nested if statementsPerformancecompiler/runtime

#21394 opened 7 years ago by josharian

gdb 8 on windows crashes reading Go binaryNeedsInvestigationOS-Windows

#21380 opened 7 years ago by kjk

add and use go:nosplitrec compilation directiveNeedsFixcompiler/runtime

#21314 opened 7 years ago by ianlancetaylor

incorrect type assertions on conflicting package namesNeedsFix

#21282 opened 7 years ago by dsnet

late nilcheck elim doesn't elim later nilcheckcompiler/runtime

#20962 opened 7 years ago by josharian

CSE some function calls args/resultsPerformanceToolSpeedcompiler/runtime

#20934 opened 7 years ago by josharian

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

#20881 opened 7 years ago by rogpeppe

add OpAMD64CMPptr and friends?NeedsDecisioncompiler/runtime

#20873 opened 7 years ago by josharian

generate same code regardless of whether return values are namedNeedsFixcompiler/runtime

#20859 opened 7 years ago by bradfitz

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

#20533 opened 7 years ago by alandonovan

include certain NOP instructions when compiler optimizations are disabledDebuggingFeatureRequestNeedsFixcompiler/runtime

#20487 opened 7 years ago by dlsniper

init code or linker should verify package "fingerprint"NeedsFixcompiler/runtimehelp wanted

#20486 opened 7 years ago by griesemer

improve loop rotationPerformancecompiler/runtime

#20411 opened 7 years ago by josharian

lay out loop-free, likeliness-free control flow more compactlyPerformancecompiler/runtime

#20356 opened 7 years ago by josharian

trim more blocks?Performancecompiler/runtime

#20354 opened 7 years ago by josharian

inlining isn't performed on generated init functions compiler/runtimeearly-in-cycle

#20321 opened 7 years ago by tzneal

missing line numbers with cgo pragmasNeedsInvestigationcompiler/runtime

#20214 opened 7 years ago by josharian

move arch-specific rewrite rules and ops into arch-specific packagesNeedsFixPerformanceToolSpeedcompiler/runtime

#20104 opened 7 years ago by josharian

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

#20095 opened 7 years ago by philpennock

add special binary export encoding for iotas?ToolSpeedcompiler/runtime

#20088 opened 7 years ago by josharian

postpone argument conversions after inliningNeedsFixPerformancecompiler/runtime

#20087 opened 7 years ago by rasky

some problems on optimization when takes care about of arrays in structNeedsFixPerformancecompiler/runtimehelp wanted

#20022 opened 7 years ago by zhaozhiqianghw

big array not allocated on heap, which make program panic.NeedsFixcompiler/runtime

#20021 opened 7 years ago by zigo101

go:linkname prevents inliningPerformancecompiler/runtime

#20019 opened 7 years ago by dvyukov

possible infinite recursion in Type.cmpNeedsInvestigationcompiler/runtime

#19869 opened 7 years ago by josharian

share statictmpPerformancecompiler/runtime

#19818 opened 7 years ago by QuestionPython

avoid copying if copied value isn't modifiedPerformancecompiler/runtime

#19817 opened 7 years ago by valyala

slow to compile large map literals containing dynamic elementsToolSpeedcompiler/runtime

#19751 opened 7 years ago by myleshorton

clumsy rematerialization in mapassign_fast*Performancecompiler/runtime

#19733 opened 7 years ago by philhofer

arm64: emit double-register loads and stores in loweringNeedsFixPerformancecompiler/runtime

#19715 opened 7 years ago by philhofer

Unnecessary register high-bytes rezeroing after unsigned right shiftPerformancecompiler/runtime

#19712 opened 7 years ago by navytux

eliminate base.Pos and ir.CurFuncNeedsFixcompiler/runtimehelp wanted

#19683 opened 7 years ago by mdempsky

use FP-based frame zeroing outside of package runtime on plan9NeedsInvestigationOS-Plan9Performancecompiler/runtime

#19650 opened 7 years ago by mdempsky

avoid multiple returns from deferproccompiler/runtime

#19466 opened 7 years ago by randall77

an FSM with ~40k states takes a lot of memory to buildToolSpeedcompiler/runtime

#19379 opened 7 years ago by ghost

needlessly early return value loads in runtime.scanobjectPerformancecompiler/runtime

#19195 opened 7 years ago by josharian

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

#19165 opened 7 years ago by valyala

add tool for understanding/debugging SSA rulescompiler/runtime

#19013 opened 7 years ago by josharian

Fannkuch11 on AMD64 slow down 6% after removing assembler backend instruction reorderingPerformancecompiler/runtime

#18977 opened 7 years ago by cherrymui

optimize Write([]byte(stringVal)) to not copy the stringPerformancecompiler/runtime

#18822 opened 7 years ago by ianlancetaylor

order.go is outdatedPerformanceToolSpeedcompiler/runtime

#18739 opened 7 years ago by josharian

performance problems with many long, exported identifiersNeedsInvestigationToolSpeed

#18602 opened 7 years ago by cretz

fixedbug/issue10958.go failuresNeedsInvestigationTestingcompiler/runtime

#18589 opened 7 years ago by ALTree

improve code generation for temporary slice copy and inliningPerformancecompiler/runtime

#18529 opened 7 years ago by rasky

investigate closure capture issueNeedsInvestigationPerformancecompiler/runtime

#18300 opened 8 years ago by bradfitz

some local variables are missing from DWARFDebuggingcompiler/runtime

#18247 opened 8 years ago by alandonovan

improve map iterationPerformancecompiler/runtime

#18004 opened 8 years ago by cherrymui

insertVarPhis is very slowToolSpeedcompiler/runtime

#17926 opened 8 years ago by dvyukov

elide branches that must be takenPerformancecompiler/runtime

#17862 opened 8 years ago by dsnet

implement duffcopy on ppc64xNeedsDecisionPerformancecompiler/runtime

#17842 opened 8 years ago by bradfitz

merge order/walk/instrument into buildssaToolSpeedcompiler/runtime

#17728 opened 8 years ago by mdempsky

remove all pointers from type informationcompiler/runtime

#17724 opened 8 years ago by crawshaw

use better code for slicingPerformancecompiler/runtime

#17638 opened 8 years ago by randall77

optimize functions into boolean expressionsPerformancecompiler/runtime

#17622 opened 8 years ago by dsnet

improve inlining cost modelNeedsInvestigationPerformanceToolSpeedcompiler/runtime

#17566 opened 8 years ago by josharian

-bench should correct for GCNeedsFixcompiler/runtime

#17434 opened 8 years ago by mdempsky

large arrays cause large binaries and toolchain errorsNeedsDecisioncompiler/runtime

#17378 opened 8 years ago by crawshaw

eliminate more bounds checksPerformancecompiler/runtime

#17370 opened 8 years ago by carl-mastrangelo

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

#17314 opened 8 years ago by dAdAbird

optimize f32Slice[i] += 1 across math.Float32bits, Float32frombitsNeedsFixcompiler/runtime

#17220 opened 8 years ago by nigeltao

elimination of unused runtime callsPerformancebinary-sizecompiler/runtime

#17216 opened 8 years ago by DmitriyMV

optimizing multiple accesses to same key in mapNeedsFixPerformancecompiler/runtime

#17133 opened 8 years ago by rasky

avoid reloads of temp register on ppc64le, othersNeedsFixPerformancecompiler/runtime

#17110 opened 8 years ago by laboger

combine contiguous multi-byte comparisons to a constantPerformancecompiler/runtime

#17106 opened 8 years ago by josharian

reuse algs for [N]T arraysbinary-sizecompiler/runtime

#17031 opened 8 years ago by mdempsky

make algs content-addressablebinary-sizecompiler/runtime

#17029 opened 8 years ago by josharian

detect call trees that can be marked NOSPLITPerformancecompiler/runtime

#17023 opened 8 years ago by josharian

use common ancestor blocks in CSE?Performancecompiler/runtime

#16973 opened 8 years ago by josharian

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

#16929 opened 8 years ago by mdempsky

inline reflect.TypeOf (or make it intrinsic)Performancecompiler/runtime

#16869 opened 8 years ago by bradfitz

should recognize binary package and intrinsify it where possiblePerformancecompiler/runtime

#16832 opened 8 years ago by dr2chase

-buildmode=c-shared and dlopen-ing a shared libraryNeedsInvestigationcompiler/runtimeearly-in-cycle

#16805 opened 8 years ago by sbinet

make SSA IDs stable across passesNeedsFixcompiler/runtime

#16754 opened 8 years ago by bradfitz

move SSA boolean optimizations to generic levelcompiler/runtime

#16747 opened 8 years ago by josharian

print better error message when assigning to keywordscompiler/runtime

#16521 opened 8 years ago by dsnet

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

#16416 opened 8 years ago by josharian

new backend; multiple efficiency issues...NeedsFixPerformancecompiler/runtime

#16192 opened 8 years ago by GordonBGood

go1.7beta2 performance regression (floats and arrays)NeedsInvestigationPerformancecompiler/runtime

#16187 opened 8 years ago by taruti

go1.7beta2 performance regressionNeedsFixPerformancecompiler/runtime

#16141 opened 8 years ago by samuel

poor register allocator behavior in compression codeNeedsFixPerformancecompiler/runtime

#16122 opened 8 years ago by flanglet

do front-end constant evaluation across simple inlined function boundariesNeedsFixPerformancecompiler/runtime

#16108 opened 8 years ago by josharian

complicated bounds check eliminationNeedsFixPerformance

#16092 opened 8 years ago by GordonBGood

escape analysis of interface calls to non-exported method namescompiler/runtime

#16001 opened 8 years ago by mdempsky

SSA performance regression due to array zeroingNeedsFixPerformancecompiler/runtime

#15925 opened 8 years ago by ghost

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

#15812 opened 8 years ago by randall77

loads/constants not lifted out of loopNeedsFixPerformancecompiler/runtime

#15808 opened 8 years ago by randall77

misleading error for multiple value function call in contexts that do accept multiple valuescompiler/runtime

#15785 opened 8 years ago by tmielcza

poor error message when invoking method on embedded typeNeedsFixcompiler/runtime

#15711 opened 8 years ago by dsymonds

better error message for scoped type errorNeedsFixcompiler/runtime

#15575 opened 8 years ago by gouthamve

support inlining non-escaping closuresPerformancecompiler/runtime

#15561 opened 8 years ago by josharian

SSA performance regression on polygon codeNeedsFixPerformanceearly-in-cycle

#15532 opened 8 years ago by nkovacs

evaluate the need for shortcircuitNeedsInvestigationPerformanceearly-in-cycle

#15512 opened 8 years ago by brtzsnr

unexplained allocation for convT2IPerformancecompiler/runtime

#15451 opened 8 years ago by robpike

ephemeral slicing doesn't need protection against next object pointersPerformancecompiler/runtime

#15397 opened 8 years ago by randall77

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

#15375 opened 8 years ago by randall77

move Type.Width and Type.Align into Extra fieldsToolSpeedcompiler/runtime

#15308 opened 8 years ago by josharian

combine extension with register loads and stores on amd64Performancecompiler/runtime

#15300 opened 8 years ago by josharian

sync/atomic.SwapPointer arguments escape for the wrong reasonNeedsFixcompiler/runtime

#15283 opened 8 years ago by aclements

eliminate write barrier for self-referencing pointerPerformancecompiler/runtime

#15238 opened 8 years ago by randall77

suboptimal compilation of struct-valued switch statementsPerformancecompiler/runtime

#15164 opened 8 years ago by mdempsky

possible inlining bug with variable renaming?compiler/runtime

#15111 opened 8 years ago by griesemer

make available as a libraryNeedsDecision

#15108 opened 8 years ago by ghost

combine AND 0xff and MOVQload into MOVBQZXloadPerformancecompiler/runtime

#15105 opened 8 years ago by martisch

unnecessary branchingPerformancecompiler/runtime

#15031 opened 8 years ago by randall77

BLAS Idamax regressionNeedsFixPerformanceearly-in-cycle

#14995 opened 8 years ago by btracey

consider write barrier short-circuit when *dst == srcPerformancecompiler/runtime

#14921 opened 8 years ago by josharian

improve escape analysis understanding of tree structurescompiler/runtime

#14858 opened 8 years ago by josharian

unnecessary bounds checks are not removedPerformancecompiler/runtime

#14808 opened 8 years ago by brtzsnr

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

#14762 opened 8 years ago by randall77

redundant loop generated for comparing/hashing arrays of size 1.Performancebinary-sizecompiler/runtime

#14723 opened 8 years ago by brtzsnr

performance of embedded interfacescompiler/runtime

#14677 opened 8 years ago by OneOfOne

type checking fails in cycle involving recursive struct and unsafe.SizeofNeedsFixcompiler/runtime

#14620 opened 8 years ago by rsc

SSA, don't re-copy spilled output parametersPerformancecompiler/runtime

#14586 opened 8 years ago by randall77

coverage instrumentation for fuzzingFeatureRequestNeedsFixcompiler/runtime

#14565 opened 8 years ago by dvyukov

recognize append loopPerformancecompiler/runtime

#14325 opened 8 years ago by bradfitz

stack overflow accessing large return valueNeedsFixcompiler/runtime

#14028 opened 8 years ago by kaypour

Need better type propagationPerformancecompiler/runtime

#14018 opened 8 years ago by dr2chase

escape analysis overconservative for recursive callsNeedsFixcompiler/runtime

#13547 opened 9 years ago by dr2chase

storing pointer of a local value escapesPerformancecompiler/runtime

#13493 opened 9 years ago by dsnet

Suggest typo fixes for resolution errorsNeedsInvestigationcompiler/runtime

#13477 opened 9 years ago by Manishearth

turn nilcheckelim into branchelimNeedsFixPerformancecompiler/runtime

#12628 opened 9 years ago by josharian

disambiguate package short names in "is not assignable" compile errorscompiler/runtime

#12399 opened 9 years ago by doherty

some large-temp-heap-allocations need to be moved before escape analysiscompiler/runtime

#10936 opened 9 years ago by dr2chase

inefficient increment of global array compiler/runtime

#10432 opened 9 years ago by dvyukov

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

#10382 opened 9 years ago by josharian

assigning large values does not use memmovecompiler/runtime

#10362 opened 9 years ago by davecheney

inline function calls that return a closureNeedsInvestigationPerformancecompiler/runtime

#10292 opened 9 years ago by potocnyj

improve generated type equality codecompiler/runtime

#9930 opened 9 years ago by josharian

better error message when attempting to use a shadowed type nameNeedsInvestigation

#9655 opened 9 years ago by pwaller

enhancements to the gc inliner and optimizercompiler/runtime

#9337 opened 10 years ago by tildeleb

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

#8983 opened 10 years ago by gopherbot

recognize case <-time.After(x)Performancecompiler/runtime

#8895 opened 10 years ago by dvyukov

confusing error messages when a type is repeatedSuggested

#8853 opened 10 years ago by btracey

merge temporaries more aggressivelyNeedsFixPerformance

#8740 opened 10 years ago by josharian

random performance fluctuations after unrelated changesNeedsFixPerformance

#8717 opened 10 years ago by dvyukov

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

#8659 opened 10 years ago by btracey

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

#8481 opened 10 years ago by augustoroman

Wrong type reported for constant in type mismatch reportNeedsInvestigation

#8409 opened 10 years ago by btracey

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

#8357 opened 10 years ago by gopherbot

Opportunity for de-pessimization in provably const range loopsSuggested

#8346 opened 10 years ago by thockin

does not understand old linker flagsNeedsInvestigation

#8104 opened 10 years ago by dvyukov

report all missing methods on failed interface satisfactionNeedsInvestigation

#8095 opened 10 years ago by btracey

rethink temporary namesNeedsInvestigation

#7923 opened 10 years ago by josharian

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

#7921 opened 10 years ago by lukescott

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

#7681 opened 10 years ago by randall77

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

#7651 opened 10 years ago by mpvl

combine slice header and backing array for static slices into a single symbolbinary-size

#7637 opened 10 years ago by josharian

do more static initialization at compile time rather than runtimeNeedsInvestigation

#7599 opened 10 years ago by josharian

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

#6814 opened 11 years ago by btracey

support for explicit alignment annotationsThinking

#6752 opened 11 years ago by gopherbot

skip slicebytetostring when argument doesn't escapeGarbageCollectorPerformance

#6714 opened 11 years ago by bradfitz

use less memory for large []byte literalNeedsFixToolSpeedhelp wanted

#6643 opened 11 years ago by rsc

internal compiler error with self-referential method in interfaceNeedsInvestigation

#6638 opened 11 years ago by griesemer

spurious error for recursive anonymous interface typeNeedsInvestigation

#6601 opened 11 years ago by adonovan

odd/inconsistent behavior with cyclic declarationsNeedsInvestigation

#6590 opened 11 years ago by griesemer

8MB error message for one char errorNeedsInvestigation

#6589 opened 11 years ago by griesemer

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

#6206 opened 11 years ago by gopherbot

missed escape analysis opportunityNeedsInvestigation

#5919 opened 11 years ago by edsrzf

emits unnecessary deferreturnPerformance

#5712 opened 11 years ago by dvyukov

avoid closure for captured dynamic constantNeedsInvestigation

#5370 opened 11 years ago by lexprfuncall

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

#5142 opened 11 years ago by btracey

more clever syntax error reportingNeedsInvestigation

#5129 opened 11 years ago by btracey

init loop does not trace through inlined functionsNeedsInvestigation

#4758 opened 11 years ago by rsc

omit zeroing of named return value when possibleNeedsInvestigation

#4750 opened 11 years ago by rsc

error message for bad case in switch should suggest selectThinking

#4697 opened 11 years ago by adg

which errors are confusing?Suggested

#4566 opened 12 years ago by rsc

possible error message improvementNeedsInvestigation

#4565 opened 12 years ago by rsc

eliminate duplicate instrumentation in racewalkPerformanceRaceDetector

#4247 opened 12 years ago by dvyukov

output variable names in data race reportsRaceDetector

#4246 opened 12 years ago by dvyukov

why are stack frames so large?Performancehelp wanted

#2734 opened 13 years ago by rsc

static init maps should never generate codeNeedsInvestigationPerformancebinary-size

#2559 opened 13 years ago by rsc

include registerization info for gdbNeedsInvestigation

#2430 opened 13 years ago by ianlancetaylor

infinite recursion generating symbol for recursive typeNeedsInvestigation

#1909 opened 13 years ago by gopherbot

1.3MB program takes 290MB of memory to compilePerformance

#1860 opened 13 years ago by davecheney