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[clang] Make __declspec(novtable) available in GNU driver mode

clang:driver'clang' and 'clang++' user-facing binaries. Not 'clang-cl''clang' and 'clang++' user-facing binaries. Not 'clang-cl'

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

extension:microsoft

Status: Open.

Feature

#157801 In llvm/llvm-project;

· void2012 opened on Sep 10, 2025

#pragma init_seg(section-specifier, func-name) not supported

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

extension:microsoft

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

platform:windows

Status: Open.

#148938 In llvm/llvm-project;

· AdamGlass opened on Jul 15, 2025

MSVC Compatibility: [[msvc::no_unique_address]] doesn't work in a base class

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

confirmedVerified by a second partyVerified by a second party

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

extension:microsoft

Status: Open.

#143245 In llvm/llvm-project;

· mingxwa opened on Jun 7, 2025

On Windows, can't create constexpr assignment for function pointer of function marked with dllimport

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

constexprAnything related to constant evaluationAnything related to constant evaluation

extension:microsoft

platform:windows

Status: Open.

#125952 In llvm/llvm-project;

· cgagnon-mw opened on Feb 5, 2025

Suppress "unknown attribute 'no_unique_address' ignored" with MSVC ABI

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

extension:microsoft

Status: Open.

#125184 In llvm/llvm-project;

· bebuch opened on Jan 31, 2025

Underlying type of unscoped and unfixed member enumerations of class templates

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

extension:microsoft

Status: Open.

#125180 In llvm/llvm-project;

· thebrandre opened on Jan 31, 2025

Syntax error for overloaded operator[] in 32-bit address space

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

extension:microsoft

Status: Open.

#124913 In llvm/llvm-project;

· ararmine opened on Jan 29, 2025

Microsoft extension: Allowing forward declaration of emum w/ fixed underlying type to be defined w/o fixed underlying type

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

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

extension:microsoft

Status: Open.

#122032 In llvm/llvm-project;

· shafik opened on Jan 8, 2025

[clang-cl] why this code can be compiled with clang-cl?

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

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

extension:microsoft

questionA question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!A question, not bug report. Check out https://llvm.org/docs/GettingInvolved.html instead!

Status: Open.

#119562 In llvm/llvm-project;

· Arteiimis opened on Dec 11, 2024

return in __finally in loop hits breakpoint

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

extension:microsoft

miscompilation

Status: Open.

Bug

#116930 In llvm/llvm-project;

· jaykrell opened on Nov 20, 2024

continue in __finally fails assert (!BreakContinueStack.empty() && "continue stmt not in a loop)

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

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

extension:microsoft

Status: Open.

Bug

#116926 In llvm/llvm-project;

· jaykrell opened on Nov 20, 2024

break out of __finally block fails assert (!BreakContinueStack.empty() && "break stmt not in a loop or switch!")

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

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

extension:microsoft

Status: Open.

Bug

#116925 In llvm/llvm-project;

· jaykrell opened on Nov 20, 2024