Incomplete implementation of P2280 / CWG2517 good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" concepts C++20 concepts confirmed Verified by a second party cwg-issue An issue that was filed to the Core Working Group diverges-from:gcc Does the clang frontend diverge from gcc on this issue

#132825 opened Mar 24, 2025 by brevzin

7

llvm-reduce should print short form, actionable names in the log enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute llvm-reduce

#132696 opened Mar 24, 2025 by arsenm

5

Inconsistency in sinh(const), cosh(const), and tanh(const) optimizations with -ffast-math good first issue https://github.com/llvm/llvm-project/contribute missed-optimization floating-point Floating-point math constant-folding Problems related to constant folding in the optimizer

#132503 opened Mar 22, 2025 by k-arrows

6

[libc] implement memalignment good first issue https://github.com/llvm/llvm-project/contribute libc

#132300 opened Mar 20, 2025 by michaelrj-google

6

[clang] clang frontend crash with friend class declaration and overloaded `operator ==` good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party crash Prefer [crash-on-valid] or [crash-on-invalid]

#132249 opened Mar 20, 2025 by Rush10233

9

small mistake in -fmodule-file description breaks clang++-19 frontend with -fstack-protector good first issue https://github.com/llvm/llvm-project/contribute clang:modules C++20 modules and Clang Header Modules

#132059 opened Mar 19, 2025 by igormcoelho

9

`clang-analyzer-optin.cplusplus.UninitializedObject` false positive with unnamed fields good first issue https://github.com/llvm/llvm-project/contribute clang:static analyzer false-positive Warning fires when it should not

#132001 opened Mar 19, 2025 by firewave

10

[Clang][Diagnostics] Consider splitting warning on cv-qualified base classes into a separate group good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#131935 opened Mar 18, 2025 by MagentaTreehouse

6

AMDGPU GlobalISel fails on select of G_UBSANTRAP good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU llvm:globalisel

#131740 opened Mar 18, 2025 by arsenm

5

AMDGPU should handle SimplifyDemandedVectorElts for more trivial intrinsics good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU missed-optimization

#131734 opened Mar 18, 2025 by arsenm

9

[RISC-V] extra `andi` instruction when loading a `bool` atomically good first issue https://github.com/llvm/llvm-project/contribute clang:codegen IR generation bugs: mangling, exceptions, etc. missed-optimization

#131476 opened Mar 15, 2025 by aoates

9

[InstCombine] Infer exact for lshr by cttz good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization

#131444 opened Mar 15, 2025 by nikic

6

[CIR] Cleanup support for C functions good first issue https://github.com/llvm/llvm-project/contribute ClangIR Anything related to the ClangIR project

#130200 opened Mar 6, 2025 by andykaylor

8

Failure to recognise unnecessary sext for add+cmp good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization

#130088 opened Mar 6, 2025 by RKSimon

11

[RISCV] Missing builtin __builtin_riscv_pause good first issue https://github.com/llvm/llvm-project/contribute backend:RISC-V clang:headers Headers provided by Clang, e.g. for intrinsics

#129961 opened Mar 6, 2025 by brad0

6

Improve `llvm.ucmp.iN.i1` codegen (specifically the 1-bit inputs case) good first issue https://github.com/llvm/llvm-project/contribute missed-optimization llvm:SelectionDAG SelectionDAGISel as well

#129401 opened Mar 1, 2025 by scottmcm

7

Implement fixed point fxdivi functions in llvm-libc good first issue https://github.com/llvm/llvm-project/contribute libc

#129126 opened Feb 27, 2025 by PiJoules

8

Implement fixed point idivfx functions in llvm-libc good first issue https://github.com/llvm/llvm-project/contribute libc

#129125 opened Feb 27, 2025 by PiJoules

9

Implement fixed point divifx functions in llvm-libc good first issue https://github.com/llvm/llvm-project/contribute libc

#129124 opened Feb 27, 2025 by PiJoules

11

Implement fixed point mulifx functions in llvm-libc good first issue https://github.com/llvm/llvm-project/contribute libc

#129123 opened Feb 27, 2025 by PiJoules

7

regression: false positive from `clang-analyzer-unix.StdCLibraryFunctions` with `getcwd()` good first issue https://github.com/llvm/llvm-project/contribute clang:static analyzer false-positive Warning fires when it should not regression:18 Regression in 18 release

#128882 opened Feb 26, 2025 by seanm

6

AMDGPU SALU pseudos should not have side effects good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU

#128685 opened Feb 25, 2025 by jayfoad

4

AMDGPU is missing simplify demanded bits optimizations of readfirstlane and similar operations good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU missed-optimization

#128390 opened Feb 23, 2025 by arsenm

4

[MLIR][Python] IntegerAttribute doesn't accept unsigned values greater than 63 bits good first issue https://github.com/llvm/llvm-project/contribute mlir:python MLIR Python bindings

#128072 opened Feb 20, 2025 by teqdruid

11

GlobalISel should have G_POISON good first issue https://github.com/llvm/llvm-project/contribute llvm:globalisel

#127486 opened Feb 17, 2025 by arsenm

6

AMDGPU: can optimize away v_readfirstlane_b32 on implicit_def input good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU missed-optimization

#125950 opened Feb 5, 2025 by rampitec

6

Entire lambda body is printed in a note good first issue https://github.com/llvm/llvm-project/contribute c++ clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#125914 opened Feb 5, 2025 by Endilll

7

Alias template CTAD is erroneously allowed in C++17 mode good first issue https://github.com/llvm/llvm-project/contribute c++17 clang:frontend Language frontend issues, e.g. anything involving "Sema" accepts-invalid confirmed Verified by a second party

#125913 opened Feb 5, 2025 by PJBoy

10

[ValueTracking] computeKnownBitsFromOperator - improve Instruction::BitCast handling to match SelectionDAG good first issue https://github.com/llvm/llvm-project/contribute missed-optimization llvm:analysis

#125228 opened Jan 31, 2025 by RKSimon

6

[llvm-mca][FeatureRequest] In timeline graph, note source of delay for each instruction good first issue https://github.com/llvm/llvm-project/contribute tools:llvm-mca

#123756 opened Jan 21, 2025 by ibogosavljevic

7

Audit/Update `select` uses in DiagnosticXKinds.td to use `enum_select`. good first issue https://github.com/llvm/llvm-project/contribute quality-of-implementation clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#123121 opened Jan 15, 2025 by erichkeane

9

[AMDGPU][GISel] Missing FMAX3 use good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU llvm:globalisel

#123079 opened Jan 15, 2025 by qcolombet

13

Add a `--verbose` option for `llvm-strip` enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute tools:llvm-objcopy/strip

#123041 opened Jan 15, 2025 by fxmarty-amd

10

missing parenthesis for function-like macro invocation could have better diagnostic good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#123038 opened Jan 15, 2025 by zmodem

4

llvm/lib/CodeGen/LiveRangeUtils.h:40: Iterators applied to wrong data structure ? good first issue https://github.com/llvm/llvm-project/contribute llvm:codegen code-quality

#122937 opened Jan 14, 2025 by dcb314

4

[libc][docs][POSIX] flush out documentation for the POSIX defined headers documentation good first issue https://github.com/llvm/llvm-project/contribute libc

#122006 opened Jan 7, 2025 by nickdesaulniers

27

Stack-overflow as a result of stack exhaustion in function `assign()` good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" compiler-rt:asan Address sanitizer crash-on-invalid generated by fuzzer

#121952 opened Jan 7, 2025 by skorpion98

7

[clang] Poor diagnostic with wrong template argument type enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer confirmed Verified by a second party

#121235 opened Dec 27, 2024 by antoniofrighetto

7

[Clang][Driver][Test] No negative tests for unsupported options in different drivers good first issue https://github.com/llvm/llvm-project/contribute test-suite clang:driver 'clang' and 'clang++' user-facing binaries. Not 'clang-cl'

#119190 opened Dec 9, 2024 by Maetveis

7

[AArch64][GlobalISel] ABD operations and combines good first issue https://github.com/llvm/llvm-project/contribute backend:AArch64 llvm:globalisel missed-optimization

#118085 opened Nov 29, 2024 by davemgreen

12

[AArch64][GlobalISel] HADD operations and combines good first issue https://github.com/llvm/llvm-project/contribute backend:AArch64 llvm:globalisel missed-optimization

#118083 opened Nov 29, 2024 by davemgreen

8

move `AST_MATCHER(VarDecl, isLocal) { return Node.isLocalVarDecl(); }` to ast-matcher good first issue https://github.com/llvm/llvm-project/contribute clang-tidy

#117431 opened Nov 23, 2024 by HerrCai0907

9

[NVPTX] Port code to `llvm/lib/CodeGen/SelectionDAG/*` good first issue https://github.com/llvm/llvm-project/contribute backend:NVPTX llvm:SelectionDAG SelectionDAGISel as well

#116695 opened Nov 18, 2024 by justinfargnoli

6

[MLIR][affine] Proper handling of vector load / stores in Affine dialect and transformations good first issue https://github.com/llvm/llvm-project/contribute mlir:affine

#115989 opened Nov 13, 2024 by dragondracarys007

9

[MLIR][affine] Illegal affine loop fusion with vector types good first issue https://github.com/llvm/llvm-project/contribute mlir:affine

#115849 opened Nov 12, 2024 by dragondracarys007

9

@llvm.experimental.stackmap intrinsic crashes when the second parameter (numShadowBytes) is a variable instead of a constant good first issue https://github.com/llvm/llvm-project/contribute llvm:codegen crash Prefer [crash-on-valid] or [crash-on-invalid] llvm:SelectionDAG SelectionDAGISel as well

#115733 opened Nov 11, 2024 by DigOrDog

7

Are the tutorials up-to-date? (Clang version is 20.0.0git) documentation good first issue https://github.com/llvm/llvm-project/contribute clang Clang issues not falling into any other category

#114711 opened Nov 3, 2024 by bobhairgrove

12

LLVM cannot constant fold memchr with local buffer good first issue https://github.com/llvm/llvm-project/contribute llvm:optimizations

#114668 opened Nov 2, 2024 by philnik777

4

[NVPTX] Implement `TLI.isTruncateFree(EVT, EVT)` and `TLI.isZExtFree()` good first issue https://github.com/llvm/llvm-project/contribute backend:NVPTX

#114339 opened Oct 31, 2024 by justinfargnoli

11

[mlir][Vector] Improve support for 0-d vectors in vector dialect lowerings good first issue https://github.com/llvm/llvm-project/contribute mlir:vector

#112913 opened Oct 18, 2024 by Groverkss

6

[clang] Assertion `(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && "this property has not yet been computed by Sema"' failed. good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" crash-on-invalid confirmed Verified by a second party generated by fuzzer

#112909 opened Oct 18, 2024 by yijan4845

8

scalbln(x, n), scalbn(x, n), ldexp(x, n) are not folded at the compilation time when (x, n) is constant good first issue https://github.com/llvm/llvm-project/contribute llvm:optimizations missed-optimization floating-point Floating-point math

#112631 opened Oct 16, 2024 by k-arrows

5

AMDGPU should implement TargetLowering::hasAndNot good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU

#112550 opened Oct 16, 2024 by arsenm

17

[DAG][X86] Use shrdq to insert into a bitfield good first issue https://github.com/llvm/llvm-project/contribute backend:X86 missed-optimization

#112488 opened Oct 16, 2024 by kazutakahirata

8

[feature][riscv] handle target address calculation in llvm-objdump disassembly for riscv good first issue https://github.com/llvm/llvm-project/contribute tools:llvm-objdump

#108469 opened Sep 12, 2024 by PiJoules

8

Unused lambda capture source ranges are slightly off good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" quality-of-implementation clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer confirmed Verified by a second party

#106445 opened Aug 28, 2024 by tbaederr

16

[mlir] Auto generate docs for dialect op interfaces good first issue https://github.com/llvm/llvm-project/contribute mlir:core MLIR Core Infrastructure

#104593 opened Aug 16, 2024 by tomnatan30

6

[clang-analyzer-security.insecureAPI.strcpy] extend list of unsafe functions good first issue https://github.com/llvm/llvm-project/contribute clang:static analyzer

#103038 opened Aug 13, 2024 by ingo-loehken

15

[Clang] Suggest more test cases on issue 79748 good first issue https://github.com/llvm/llvm-project/contribute test-suite clang:frontend Language frontend issues, e.g. anything involving "Sema"

#102422 opened Aug 8, 2024 by lyazj

5

"clang/docs/LibTooling.rst" example code causing crash when invalid paramter given documentation good first issue https://github.com/llvm/llvm-project/contribute clang Clang issues not falling into any other category

#97983 opened Jul 8, 2024 by nickhuang99

2

SimplifyDemandedBits should handle fneg/fabs/fcopysign good first issue https://github.com/llvm/llvm-project/contribute floating-point Floating-point math llvm:SelectionDAG SelectionDAGISel as well

#97427 opened Jul 2, 2024 by arsenm

14

[clang] [C++20] Defaulted `operator==` doesn't lookup in using-directive properly good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema"

#97087 opened Jun 28, 2024 by MitalAshok

8

Optimize `decltype(T{})` to `T` in compiler error messages good first issue https://github.com/llvm/llvm-project/contribute quality-of-implementation clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#96638 opened Jun 25, 2024 by mpusz

11

Clang could warn about trailing spaces in `#include` filenames enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#96064 opened Jun 19, 2024 by zmodem

7

[mlir][transform] ApplyToEachResultList does not define STL convenience methods good first issue https://github.com/llvm/llvm-project/contribute mlir:transform_dialect

#94968 opened Jun 10, 2024 by Groverkss

5

[AArch64] Missed optimization converting vector fmul(sitofp(x), 0.5) -> scvtf(x, 2) good first issue https://github.com/llvm/llvm-project/contribute backend:AArch64

#94909 opened Jun 9, 2024 by efriedma-quic

8

[MLIR] Incorrect result for RuntimeVerifiableOpInterface on MemRef::ReinterpretCastOpInterface good first issue https://github.com/llvm/llvm-project/contribute mlir:memref

#94864 opened Jun 8, 2024 by chentong319

10

[mlir][transform] transform.structured.tile_using_for crashes on invalid number of results good first issue https://github.com/llvm/llvm-project/contribute mlir:transform_dialect

#93693 opened May 29, 2024 by Groverkss

9

Addressing `-Wimplicit-float-conversion` warning might lead to precision loss question A question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead! good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#93288 opened May 24, 2024 by firewave

16

[InstCombine] Failure to factorize `add`/`sub` and `max`/`min` using distributivity good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization

#92433 opened May 16, 2024 by Kmeakin

10

`__builtin_shufflevector` runs into an assertion if no integer expressions are passed good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid]

#92342 opened May 16, 2024 by tbaederr

11

[clang] Deduplicate `FinishTemplateArgumentDeduction` helper function in `SemaTemplateDeduction.cpp`. good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema"

#92224 opened May 15, 2024 by hokein

10

[clang][C++] Bad error recovery when classes are defined inside template aliases good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" crash-on-invalid

#91564 opened May 9, 2024 by mizvekov

12

[clang-tidy][docs] `run-clang-tidy.py` is undocumented in `Using clang-tidy` documentation good first issue https://github.com/llvm/llvm-project/contribute clang-tidy

#90772 opened May 1, 2024 by 5chmidti

8

[clang-format] Add qualifiers (actual) alignments good first issue https://github.com/llvm/llvm-project/contribute clang-format

#90746 opened May 1, 2024 by KBoumghar

11

SelectionDAG store merging default implementations are unreasonable good first issue https://github.com/llvm/llvm-project/contribute llvm:SelectionDAG SelectionDAGISel as well

#90714 opened May 1, 2024 by arsenm

5

[BOLT] Evaluate and speedup discoverFileObjects help wanted Indicates that a maintainer wants help. Not [good first issue]. good first issue https://github.com/llvm/llvm-project/contribute BOLT

#90661 opened Apr 30, 2024 by aaupov

13

Decomposition Declaration diagnostic for missing initializer is pretty unclear good first issue https://github.com/llvm/llvm-project/contribute quality-of-implementation clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#90107 opened Apr 25, 2024 by erichkeane

8

[AMDGPU] generates v_cndmask/lshlrev for uniform select between 0 and a power of 2 good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU

#87938 opened Apr 7, 2024 by Engininja2

21

[AArch64] Add SimplifyDemandedVectorEltsForTargetNode support for AArch64ISD::DUPLANE nodes good first issue https://github.com/llvm/llvm-project/contribute backend:AArch64

#87497 opened Apr 3, 2024 by RKSimon

11

[GlobalIsel] Constant Folding good first issue https://github.com/llvm/llvm-project/contribute llvm:globalisel

#86406 opened Mar 23, 2024 by tschuett

8

[InstCombine] Missed optimization : fold `switch(rol(a, c))` good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization

#86161 opened Mar 21, 2024 by XChy

8

[libc] implement ioctl good first issue https://github.com/llvm/llvm-project/contribute libc

#85275 opened Mar 14, 2024 by nickdesaulniers

7

missed fold, sext(fptosi x to i32) => fptosi x to i64 good first issue https://github.com/llvm/llvm-project/contribute llvm:codegen missed-optimization floating-point Floating-point math

#85268 opened Mar 14, 2024 by zhengyang92

13

missed optimization, fptrunc (x) >= C1 => x >= C2 good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization floating-point Floating-point math

#85265 opened Mar 14, 2024 by zhengyang92

6

missed fold: (X * 0.0) * constant => X * 0.0 good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization floating-point Floating-point math

#85241 opened Mar 14, 2024 by zhengyang92

36

[DAG] SDPatternMatch - add m_BinOp/m_c_BinOp variants driven by TLI.isBinOp/isCommutativeBinOp good first issue https://github.com/llvm/llvm-project/contribute llvm:SelectionDAG SelectionDAGISel as well

#84940 opened Mar 12, 2024 by RKSimon

13

Missed Optimization: Aligned Pointer Optimizations Can't Happen With Prefered OR Instead of ADD good first issue https://github.com/llvm/llvm-project/contribute llvm:optimizations missed-optimization

#84401 opened Mar 7, 2024 by Geotale

8

[Support] Investigate making KnownBits saturated add/sub implementations optimal good first issue https://github.com/llvm/llvm-project/contribute llvm:support

#84213 opened Mar 6, 2024 by RKSimon

8

[InstCombine] Missed optimization: fail to fold `(A >> C1) Pred C2` if `shr` is used multiple times good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization

#83430 opened Feb 29, 2024 by XChy

7

[OpenMP] Metadirective uses default for non-const user condition good first issue https://github.com/llvm/llvm-project/contribute openmp clang:openmp OpenMP related changes to Clang

#82754 opened Feb 23, 2024 by Thyre

9

Add __builtin_stack_address to clang to increase compatibility to gcc good first issue https://github.com/llvm/llvm-project/contribute clang:headers Headers provided by Clang, e.g. for intrinsics

#82632 opened Feb 22, 2024 by Febbe

19

Vector Saturating Subtractions should be flipped around when the result is AND'ed good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine missed-optimization

#79690 opened Jan 27, 2024 by Validark

5

`std::filesystem::canonical("")` should throw good first issue https://github.com/llvm/llvm-project/contribute libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. filesystem C++17 std::filesystem

#77170 opened Jan 6, 2024 by Pesa

6

Implement `insertVar` having `Identifier` parameter enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute mlir:presburger

#76839 opened Jan 3, 2024 by iambrj

5

basic properties of floor and ceiling function good first issue https://github.com/llvm/llvm-project/contribute llvm:optimizations missed-optimization floating-point Floating-point math

#76438 opened Dec 27, 2023 by k-arrows

8

hasAnyArgument() spuriously ignores match good first issue https://github.com/llvm/llvm-project/contribute clang-query clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party

#75754 opened Dec 17, 2023 by xb8g2pw0

18

`readability-identifier-naming` should add universal default options enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-tidy

#75688 opened Dec 16, 2023 by cjdb

11

`bugprone-dangling-handle.HandleClasses` should update its defaults enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-tidy

#75685 opened Dec 16, 2023 by cjdb

6

Simplify initialisation diagnostic when types are cv-qualified good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#73399 opened Nov 25, 2023 by cjdb

5

[mlir][spirv] Modernize op assembly formats and syntax docs good first issue https://github.com/llvm/llvm-project/contribute code-cleanup mlir:spirv

#73359 opened Nov 24, 2023 by kuhar

16

Loading/storing an 8 aligned i128 uses two `movq` instead of a single `movups` good first issue https://github.com/llvm/llvm-project/contribute backend:X86 missed-optimization llvm:SelectionDAG SelectionDAGISel as well

#72640 opened Nov 17, 2023 by LingMan

8

[clang] Avoid printing overly large integer/_BitInt numbers in static assertion failure diagnostics good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer confirmed Verified by a second party

#71675 opened Nov 8, 2023 by tbaederr

14

[clang] --entry command line option is broken good first issue https://github.com/llvm/llvm-project/contribute clang:driver 'clang' and 'clang++' user-facing binaries. Not 'clang-cl'

#68355 opened Oct 5, 2023 by s-barannikov

9

clang-include-cleaner - replaces chrono with bits/chrono help wanted Indicates that a maintainer wants help. Not [good first issue]. good first issue https://github.com/llvm/llvm-project/contribute clang-include-cleaner

#68213 opened Oct 4, 2023 by PiotrZSL

9

Template arguments can't be used in attributes good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema"

#67154 opened Sep 22, 2023 by abrachet

11

[InstCombine][X86] Failure to replace @llvm.x86.sse41.pblendvb with select good first issue https://github.com/llvm/llvm-project/contribute backend:X86 llvm:instcombine missed-optimization

#66513 opened Sep 15, 2023 by RKSimon

10

[libc++] `std::cmp_less` and other integer comparison functions could be improved good first issue https://github.com/llvm/llvm-project/contribute libc++ libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi. performance

#65136 opened Aug 31, 2023 by Eisenwave

9

Source range of deleted or defaulted function outside class body is inaccurate good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema"

#64805 opened Aug 18, 2023 by smcpeak

13

Enable exp10 libcall recognition on linux good first issue https://github.com/llvm/llvm-project/contribute llvm:codegen llvm:optimizations platform:linux floating-point Floating-point math

#64677 opened Aug 14, 2023 by arsenm

7

clang-tidy: fully qualify names from a given namespace (e.g. clean up `using namespace std;`) good first issue https://github.com/llvm/llvm-project/contribute clang-tidy check-request Request for a new check in clang-tidy

#64441 opened Aug 4, 2023 by PhilMiller

13

llvm-reduce should convert array alloca to simple alloca good first issue https://github.com/llvm/llvm-project/contribute llvm-reduce

#64340 opened Aug 2, 2023 by arsenm

9

AMDGPUAnnotateKernelFeatures should be deleted good first issue https://github.com/llvm/llvm-project/contribute backend:AMDGPU

#63586 opened Jun 28, 2023 by arsenm

22

[OpenMP] clang crashed when openmp's collapse clause argument is unknown good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] clang:openmp OpenMP related changes to Clang

#63581 opened Jun 28, 2023 by fel-cab

6

orc::InProcessMemoryMapper makes too many memory mappings good first issue https://github.com/llvm/llvm-project/contribute orcjit julialang

#63236 opened Jun 10, 2023 by gbaraldi

11

llvm-symbolizer --markup-filter does not adjust addresses without debug info good first issue https://github.com/llvm/llvm-project/contribute tools:llvm-symbolizer

#63178 opened Jun 7, 2023 by mysterymath

4

processing .incbin with offset/count uses excessive memory good first issue https://github.com/llvm/llvm-project/contribute mc Machine (object) code

#62339 opened Apr 25, 2023 by szllzs

7

clang-cl ignores -Wpadded good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" platform:windows confirmed Verified by a second party

#61702 opened Mar 25, 2023 by cairnc

9

Clang ICE: `invalid parameter index` on some attributes with invalid indices applied to varargs functions good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" crash-on-invalid awaiting-review Has pending Phabricator review confirmed Verified by a second party

#61635 opened Mar 22, 2023 by langston-barrett

18

[clang][ExtractAPI] Declaration fragments should show types as shown in the source code. good first issue https://github.com/llvm/llvm-project/contribute clang:tooling LibTooling

#61157 opened Mar 3, 2023 by daniel-grumberg

13

a missing `type` field in `DISubprogram` does not give a warning but a Segmentation fault good first issue https://github.com/llvm/llvm-project/contribute debuginfo crash Prefer [crash-on-valid] or [crash-on-invalid]

#59471 opened Dec 12, 2022 by amtoine

19

Feature Request: Add clang-format setting to disable "*" being added when ReflowComments is used with /* */ comments good first issue https://github.com/llvm/llvm-project/contribute clang-format

#58710 opened Oct 31, 2022 by sean-mcmanus

15

Unrelated errors introduce additional runtime diagnostics by skipping CFG construction good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#58276 opened Oct 10, 2022 by rnk

6

const arrays are not ending up in zerofill causing bloat on disk good first issue https://github.com/llvm/llvm-project/contribute clang:codegen IR generation bugs: mangling, exceptions, etc.

#57325 opened Aug 23, 2022 by dmaclach

11

[analyzer] Crash using `clang_analyzer_explain()` in the `debug.ExprInspection` checker good first issue https://github.com/llvm/llvm-project/contribute clang:static analyzer crash Prefer [crash-on-valid] or [crash-on-invalid]

#57270 opened Aug 21, 2022 by isuckatcs

19

Suboptimal instruction sequence when operands are reordered good first issue https://github.com/llvm/llvm-project/contribute llvm:instcombine

#57255 opened Aug 19, 2022 by hiraditya

25

clang-tidy: readability-implicit-bool-conversion not working with std::optional good first issue https://github.com/llvm/llvm-project/contribute clang-tidy

#56009 opened Jun 13, 2022 by Amaroker

17

Check for `__unw_add_dynamic_eh_frame_section` in non-ORC-runtime exception registration paths. good first issue https://github.com/llvm/llvm-project/contribute orcjit

#55681 opened May 24, 2022 by lhames

2

Move JITLink from StringRefs to SymbolStringPtrs good first issue https://github.com/llvm/llvm-project/contribute orcjit jitlink

#55533 opened May 17, 2022 by weliveindetail

11

clang-tidy check readability-container-data-pointer fix isn't configurable to use std::string::c_str() instead of data() enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-tidy

#55026 opened Apr 21, 2022 by sean-mcmanus

10

Linker error when using an archive created with `ar` bug Indicates an unexpected problem or unintended behavior help wanted Indicates that a maintainer wants help. Not [good first issue]. good first issue https://github.com/llvm/llvm-project/contribute flang:driver

#54787 opened Apr 7, 2022 by PeixinQiao

18

Improvement: diagnose undefined behavior: within a translation unit the same identifier appears with both internal and external linkage enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#54215 opened Mar 4, 2022 by pmor13

16

Add equivalent of LambdaBodyIndentation for ObjC blocks good first issue https://github.com/llvm/llvm-project/contribute clang-format objective-c

#53740 opened Feb 11, 2022 by jrose-signal

4

Aligning consecutive assignments in enum blocks only enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format

#52983 opened Jan 4, 2022 by Julien-Elie

12

Prevent first value of header guards from being aligned (and more generally not be re-formatted) enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format

#52982 opened Jan 4, 2022 by Julien-Elie

8

JavaScriptWrapImports:false doesn't work with ColumnLimit:0 bug Indicates an unexpected problem or unintended behavior good first issue https://github.com/llvm/llvm-project/contribute clang-format

#52935 opened Dec 30, 2021 by stasm

4

[X86][SSE] Improve ISD::FP_TO_*INT_SAT vector lowering good first issue https://github.com/llvm/llvm-project/contribute backend:X86 bugzilla Issues migrated from bugzilla

#51923 opened Nov 22, 2021 by RKSimon

4

Instconsistent sdiv and srem by pow2 codegen under Oz good first issue https://github.com/llvm/llvm-project/contribute backend:X86 bugzilla Issues migrated from bugzilla llvm:SelectionDAG SelectionDAGISel as well

#51823 opened Nov 11, 2021 by topperc

4

[Clang] Support elementwise/reduction builtins in constexpr contexts. good first issue https://github.com/llvm/llvm-project/contribute c clang:frontend Language frontend issues, e.g. anything involving "Sema" bugzilla Issues migrated from bugzilla c++26 extension:clang constexpr Anything related to constant evaluation

#51787 opened Nov 9, 2021 by fhahn

14

Implement non-unit stride dense vectorization (difficult starter) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla mlir:llvm mlir:sparse Sparse compiler in MLIR

#51660 opened Oct 26, 2021 by aartbik

2

Implement more Python DSL-based "exhaustive" sparse kernel generators (easy starter) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla mlir:llvm mlir:sparse Sparse compiler in MLIR

#51657 opened Oct 26, 2021 by aartbik

6

Implement strategy for loop ordering choice (true compiler starter) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla mlir:tensor

#51651 opened Oct 25, 2021 by aartbik

6

Implement sparse kernel benchmarks (moderate level, independent, starter) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla mlir:llvm mlir:sparse Sparse compiler in MLIR confirmed Verified by a second party

#51650 opened Oct 25, 2021 by aartbik

7

Enhance our tests for sparse kernels (medium level, independent, starter) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla mlir:llvm mlir:sparse Sparse compiler in MLIR

#51649 opened Oct 25, 2021 by aartbik

2

Improve the messages output by unsupported options when using --elf-output-style=GNU good first issue https://github.com/llvm/llvm-project/contribute tools:llvm-readobj/readelf bugzilla Issues migrated from bugzilla

#51294 opened Sep 24, 2021 by gbreynoo

4

Trivial memset optimization not applied to loops under -Oz (LoopIdiomRecognize) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla llvm:optimizations missed-optimization llvm:codesize Code size issues

#50308 opened Jul 2, 2021 by jeffy1009 mannequin

24

Finish / clean up MapFile implementation good first issue https://github.com/llvm/llvm-project/contribute lld bugzilla Issues migrated from bugzilla lld:MachO

#50033 opened Jun 12, 2021 by int3

12

We should probably warn at how 'static inline' variables are odd at namespace scope. good first issue https://github.com/llvm/llvm-project/contribute c++17 bugzilla Issues migrated from bugzilla clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer confirmed Verified by a second party

#48977 opened Mar 18, 2021 by erichkeane

10

"this requires expression will only be checked for syntactic validity" suggests bad fixit, is not emitted on equally dangerous code good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla concepts C++20 concepts clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#47285 opened Oct 22, 2020 by Quuxplusone

4

`_MSVC_TRADITIONAL` is missing in MSVC compatibility mode good first issue https://github.com/llvm/llvm-project/contribute c clang:frontend Language frontend issues, e.g. anything involving "Sema" bugzilla Issues migrated from bugzilla extension:microsoft

#47114 opened Oct 8, 2020 by SirPaws mannequin

3

Incorrect generation of HTML reports good first issue https://github.com/llvm/llvm-project/contribute clang:static analyzer bugzilla Issues migrated from bugzilla

#46089 opened Jul 16, 2020 by llvmbot

7

Inliner loses the original alignment for passing by value argument good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla ipo Interprocedural optimizations llvm:optimizations confirmed Verified by a second party

#45778 opened Jun 24, 2020 by igor-breger

3

clang-format breaks doxygen content enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format bugzilla Issues migrated from bugzilla

#43831 opened Jan 8, 2020 by marcalff

3

Create a check that warns about using %p printf specifier enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang:static analyzer bugzilla Issues migrated from bugzilla

#43453 opened Nov 21, 2019 by LegalizeAdulthood

7

recognize aligned case statements enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format bugzilla Issues migrated from bugzilla

#42113 opened Jul 25, 2019 by janwilmans mannequin

5

add newline between include and namespace enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format bugzilla Issues migrated from bugzilla

#42112 opened Jul 25, 2019 by janwilmans mannequin

4

Create bugprone-printf-array check good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla check-request Request for a new check in clang-tidy

#40511 opened Mar 21, 2019 by LegalizeAdulthood

4

c11: Accepts ill-formed program with inline function definition containing modifiable variable with static storage duration. good first issue https://github.com/llvm/llvm-project/contribute c bugzilla Issues migrated from bugzilla clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer confirmed Verified by a second party

#39524 opened Dec 28, 2018 by yeah-boi mannequin

3

[X86][AVX] Prefer per-element vector shifts for known splats good first issue https://github.com/llvm/llvm-project/contribute backend:X86 bugzilla Issues migrated from bugzilla

#39424 opened Dec 18, 2018 by RKSimon

8

DWARF parser: <DW_OP_piece for offset 4 but top of stack is of size 8> good first issue https://github.com/llvm/llvm-project/contribute lldb bugzilla Issues migrated from bugzilla wrong-debug

#39145 opened Nov 27, 2018 by llvmbot

6

SortIncludes should support "@import" lines in Objective-C enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format bugzilla Issues migrated from bugzilla objective-c

#38995 opened Nov 13, 2018 by llvmbot

3

bugprone check for delete this good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla check-request Request for a new check in clang-tidy

#38089 opened Aug 28, 2018 by EugeneZelenko

6

Macros on access specifiers not formatted correctly enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-format bugzilla Issues migrated from bugzilla

#37751 opened Aug 1, 2018 by steveire

3

[meta] [debugify] fix -check-debugify failures good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla debuginfo

#37301 opened Jun 27, 2018 by gregbedwell

27

[X86] Add support for X86ISD float2int constant folding good first issue https://github.com/llvm/llvm-project/contribute backend:X86 bugzilla Issues migrated from bugzilla

#37146 opened Jun 14, 2018 by RKSimon

4

canTrackGlobalVariableInterprocedurally doesn't consider every kind of volatile user good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla ipa Interprocedural analysis

#37131 opened Jun 12, 2018 by arsenm

4

Anonymous functions do not work in MIR good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla llvm:codegen

#36511 opened Apr 18, 2018 by arsenm

11

Add option to readability-implicit-bool-conversion check to allow implicit conversion *to bool* enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla

#36323 opened Apr 2, 2018 by llvmbot

3

Improve legibility by formatting addresses with printv good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla code-quality debuginfo

#35980 opened Mar 7, 2018 by JDevlieghere

3

clang-reorder-fields tool is not documented documentation good first issue https://github.com/llvm/llvm-project/contribute clang-tools-extra bugzilla Issues migrated from bugzilla

#35520 opened Jan 31, 2018 by LegalizeAdulthood

3

clang-change-namespace tool is not documented documentation good first issue https://github.com/llvm/llvm-project/contribute clang-tools-extra bugzilla Issues migrated from bugzilla

#35519 opened Jan 31, 2018 by LegalizeAdulthood

2

modernize-use-digit-separator good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla check-request Request for a new check in clang-tidy

#35414 opened Jan 23, 2018 by LegalizeAdulthood

13

Missed optimization in math expression: tan(a) * cos(a) == sin(a) good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla confirmed Verified by a second party llvm:instcombine missed-optimization

#34950 opened Dec 10, 2017 by zamazan4ik

22

include/clang/Tooling/Refactoring/Rename/RenamingAction.h:79]: (performance) good first issue https://github.com/llvm/llvm-project/contribute clang:tooling LibTooling bugzilla Issues migrated from bugzilla confirmed Verified by a second party

#34652 opened Nov 14, 2017 by llvmbot

5

readability check to convert numerical constants to std::numeric_limits good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla confirmed Verified by a second party check-request Request for a new check in clang-tidy

#34434 opened Oct 25, 2017 by EugeneZelenko

10

[refactoring] idea: convert a switch statement to an if enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang:as-a-library libclang and C++ API bugzilla Issues migrated from bugzilla

#34352 opened Oct 19, 2017 by hyp

2

[refactoring] idea: convert a ternary operator into an if statement and vice-versa enhancement Improving things as opposed to bug fixing, e.g. new or missing feature good first issue https://github.com/llvm/llvm-project/contribute clang:as-a-library libclang and C++ API bugzilla Issues migrated from bugzilla

#34348 opened Oct 19, 2017 by hyp

6

[AArch64][CodeGen][CodeSize] Redundant 'and' can be remove with shifts in addr mode good first issue https://github.com/llvm/llvm-project/contribute backend:AArch64 bugzilla Issues migrated from bugzilla confirmed Verified by a second party missed-optimization

#34101 opened Sep 27, 2017 by llvmbot

7

Improve bitfield arithmetic good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla llvm:codegen confirmed Verified by a second party llvm:instcombine

#33874 opened Sep 8, 2017 by RKSimon

10

[DWARF] Line 0 should not have is_stmt set good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla llvm:codegen

#33870 opened Sep 7, 2017 by pogo59

1

Improve -Wparentheses for arbitrary bool contexts good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla clang:diagnostics New/improved warning or error message in Clang, but not in clang-tidy or static analyzer

#33528 opened Aug 14, 2017 by silvasean

14

[X86][SSE] Recognise v2i64 comparison patterns good first issue https://github.com/llvm/llvm-project/contribute backend:X86 bugzilla Issues migrated from bugzilla confirmed Verified by a second party llvm:instcombine

#32961 opened Jun 27, 2017 by RKSimon

8

Readability check for position of constant operand in binary operators good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla check-request Request for a new check in clang-tidy

#31860 opened Apr 3, 2017 by EugeneZelenko

9

[X86] update_llc_test_checks.py fails on win32 triples good first issue https://github.com/llvm/llvm-project/contribute llvm-tools All llvm tools that do not have corresponding tag bugzilla Issues migrated from bugzilla

#31744 opened Mar 23, 2017 by RKSimon

13

Unnecessary vector type produces wrong ll parser error good first issue https://github.com/llvm/llvm-project/contribute bugzilla Issues migrated from bugzilla llvm:core

#29043 opened Jul 22, 2016 by arsenm

5

clang crashes on x86_64-linux-gnu with Assertion `power <= maxExponent' failed good first issue https://github.com/llvm/llvm-project/contribute clang:frontend Language frontend issues, e.g. anything involving "Sema" bugzilla Issues migrated from bugzilla crash-on-invalid confirmed Verified by a second party

#28406 opened Jun 7, 2016 by llvmbot

9

Replace /* ... */ single-line comments with // ... comments good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla check-request Request for a new check in clang-tidy

#24841 opened Aug 15, 2015 by LegalizeAdulthood

7

proper indention for goto destination point good first issue https://github.com/llvm/llvm-project/contribute clang-format bugzilla Issues migrated from bugzilla

#24492 opened Jul 14, 2015 by llvmbot

8

Replace memcpy with std::copy good first issue https://github.com/llvm/llvm-project/contribute clang-tidy bugzilla Issues migrated from bugzilla awaiting-review Has pending Phabricator review check-request Request for a new check in clang-tidy

#22583 opened Jan 12, 2015 by LegalizeAdulthood

14

Can not use C99 function names as variable names in C89 good first issue https://github.com/llvm/llvm-project/contribute c clang:frontend Language frontend issues, e.g. anything involving "Sema" bugzilla Issues migrated from bugzilla rejects-valid confirmed Verified by a second party

#15522 opened Feb 4, 2013 by llvmbot

8

[Attributor] Make use of analysis in the MustBeExecutedExplorer help wanted Indicates that a maintainer wants help. Not [good first issue]. gsoc Google Summer of Code good first issue https://github.com/llvm/llvm-project/contribute

#175 opened Mar 13, 2020 by jdoerfert

1

Calling convention differs from MSVC for member functions returning SIMD types good first issue https://github.com/llvm/llvm-project/contribute backend:X86 ABI Application Binary Interface platform:windows extension:microsoft

#104 opened Jan 22, 2020 by lhallam

7