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potentially incorrect <code>error: invalid application of 'sizeof' to an incomplete type</code> with <code>-std=c++23</code>

c++23

clang:diagnosticsNew/improved warning or error message in Clang, but not in clang-tidy or static analyzerNew/improved warning or error message in Clang, but not in clang-tidy or static analyzer

diverges-from:gccDoes the clang frontend diverge from gcc on this issueDoes the clang frontend diverge from gcc on this issue

diverges-from:msvcDoes the clang frontend diverge from msvc on this issueDoes the clang frontend diverge from msvc on this issue

Status: Open.

Bug

#175483 In llvm/llvm-project;

· firewave opened on Jan 12, 2026

Typo in <code>clang/test/CodeGen/AArch64/sve2p2-intriniscs</code> folder name

clang:codegenIR generation bugs: mangling, exceptions, etc.IR generation bugs: mangling, exceptions, etc.

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

test-suite

Status: Open.

#175480 In llvm/llvm-project;

· h3fang opened on Jan 12, 2026

[clang-tidy] <code>readability-redundant-typename</code> false negative on static data members

clang-tidy

false-negativeWarning doesn't fire when it shouldWarning doesn't fire when it should

Status: Open.

#175475 In llvm/llvm-project;

· localspook opened on Jan 12, 2026

[M68k] Assertion failure on EXTRACT_SUBREG while selecting register class

backend:m68k

Status: Open.

Bug

#175472 In llvm/llvm-project;

· knickish opened on Jan 12, 2026

[rust] Performance degradation from LLVM14-&gt;15 still present in 21

llvm:optimizations

slow-compile

Status: Open.

#175465 In llvm/llvm-project;

· kika opened on Jan 11, 2026

LLVM generates storing and loading from msr NZCV when ANDS has multiple uses

backend:AArch64

Status: Open.

#175453 In llvm/llvm-project;

· AZero13 opened on Jan 11, 2026

[SLP] SLP tends to create reduce_or(shl(zext(x))) sequences when a bitcast would do

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

llvm:SLPVectorizer

missed-optimization

Status: Open.

#175446 In llvm/llvm-project;

· RKSimon opened on Jan 11, 2026

False positive <code>-Wunneeded-internal-declaration</code> for function only called in discarded statement

clang:diagnosticsNew/improved warning or error message in Clang, but not in clang-tidy or static analyzerNew/improved warning or error message in Clang, but not in clang-tidy or static analyzer

Status: Open.

#175440 In llvm/llvm-project;

· eisenwave opened on Jan 11, 2026

Request Commit Access For yassinz

infra:commit-access-request

Status: Open.

#175434 In llvm/llvm-project;

· yassinz opened on Jan 11, 2026

[clang][bytecode] Assertion `BS.Base != sizeof(GlobalInlineDescriptor)' failed.

clang:bytecodeIssues for the clang bytecode constexpr interpreterIssues for the clang bytecode constexpr interpreter

crash-on-invalid

generated by fuzzer

regression

Status: Open.

Bug

#175432 In llvm/llvm-project;

· k-arrows opened on Jan 11, 2026

clang-tidy/readability-identifier-length: allow different minimum variable name length for local vs global/static variables

clang-tidy

enhancementImproving things as opposed to bug fixing, e.g. new or missing featureImproving things as opposed to bug fixing, e.g. new or missing feature

Status: Open.

Feature

#175430 In llvm/llvm-project;

· dashofast opened on Jan 11, 2026

[Clang] Assertion <code>OldTInfo &amp;&amp; "substituting function without type source info"</code> failed since clang 6.0

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

generated by fuzzer

Status: Open.

Bug

#175428 In llvm/llvm-project;

· Xniao opened on Jan 11, 2026