microsoft/DirectXShaderCompiler

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This repo hosts the source for the DirectX Shader Compiler which is based on LLVM/Clang.

Stars: 3.7k
Forks: 900
Open beginner issues: 6
Indexed issues: 641
Avg merge: 2d 11h
Merged PRs (30d): 44

Dominant language: C++
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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641 open issues indexed

semantics: SIGSEGV when handling unbounded array with a semantic Open

bug crash diagnostic incorrect-code

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#7582 · 1 comment · Opened Jun 24, 2025
semantics: Index out of bounds error when asserts are enabled Open

bug incorrect-code

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#7581 · Opened Jun 24, 2025
[Github] Slow contributor list fetch? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/DirectXShaderCompiler#7580 · Opened Jun 24, 2025
Missing HLK test for 16 bit exp Open

hlk-gap

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

microsoft/DirectXShaderCompiler#7570 · Opened Jun 23, 2025
libdxil.so has incorrect soname and requires use of --as-needed when linking Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#7568 · 1 comment · Opened Jun 22, 2025
Missing HLK test for 16 bit log Open

hlk-gap

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#7564 · Opened Jun 21, 2025
[Feature Request] Add preprocessor definition when targeting Metal Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

microsoft/DirectXShaderCompiler#7553 · Opened Jun 18, 2025
[SPIR-V] Output semantic can be written to multiple times Open

bug spirv

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7547 · 1 comment · Opened Jun 17, 2025
Bad alignment generated for loads/stores from half arrays Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7540 · 3 comments · Opened Jun 16, 2025
[SPIR-V] Decorations on `vk::BufferPointer` aren't applied with no error or warning Open

bug spirv

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#7533 · 2 comments · Opened Jun 12, 2025
Unable to use -enable-16bit-types in rewriter. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7522 · Opened Jun 9, 2025
Make HLK test from llvm/offload-test-suite#225 Open

hlk-gap test

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/DirectXShaderCompiler#7521 · Opened Jun 6, 2025
Some specially crafted shaders exhibit unexpected branching behavior Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7509 · Opened Jun 3, 2025
[HLK] Add missing tests for `firstbitShi`, `firstbitHi`, `firstbitLo` Open

hlk-gap

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7502 · 1 comment · Opened Jun 2, 2025
[HLK] Add missing tests for `countbits` Open

hlk-gap

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

microsoft/DirectXShaderCompiler#7499 · Opened May 30, 2025
Poor compiler failure mode for invalid GetGroupNodeOutputRecords() uniformity Open

bug diagnostic

Difficulty 4/5 3-5 days Newbie friendliness 38/100

microsoft/DirectXShaderCompiler#7498 · 1 comment · Opened May 30, 2025
[SPIRV] Structs with Bitfields used as input or output consume superfluous locations Open

bug needs-triage spirv

microsoft/DirectXShaderCompiler#7491 · 2 comments · 1 assignee · Opened May 28, 2025
Crash while linking two shaders Open

bug crash shader-linking

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7486 · 1 comment · Opened May 26, 2025
Resolve libdxcompiler.so memory leak Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/DirectXShaderCompiler#7479 · Opened May 22, 2025
StructuredBuffer is reflected as constant buffer Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7462 · 1 comment · Opened May 20, 2025
Shader compilation fails when file path has utf8 characters Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

microsoft/DirectXShaderCompiler#7394 · 1 comment · Opened Apr 29, 2025
Potential invalid DXIL allowed to be generated Open

bug validation

Difficulty 4/5 3-5 days Newbie friendliness 38/100

microsoft/DirectXShaderCompiler#7391 · 1 comment · Opened Apr 28, 2025
SIGSEGV when storing struct with buffer that was picked specifically from array of buffers Open

bug crash

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7386 · Opened Apr 28, 2025
[SPIR-V] Cannot have execution modes with with different arg Open

bug spirv

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#7385 · Opened Apr 28, 2025
Lifetime of dynamic-library related resources, tied to static object instance. Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7383 · Opened Apr 27, 2025
DxilValidation: check for undef float RayDesc inputs Open

bug validation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7380 · Opened Apr 25, 2025
Diagnostic for requiring [raypayload] attribute could be clearer Open

bug diagnostic

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7358 · Opened Apr 17, 2025
[SPIR-V] Internal compiler error for mesh shader with nested struct inside output Open

bug spirv

microsoft/DirectXShaderCompiler#7340 · 1 reaction · 1 assignee · Opened Apr 12, 2025
Bad template resolution for operator overloads Open

bug hlsl2021

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7325 · 1 comment · Opened Apr 8, 2025
DXC ignores namespace in constant buffers Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#7322 · 3 comments · Opened Apr 8, 2025
WinAdapter does not enable UUID emulation on clang when C++ extensions are disabled Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#7319 · 3 comments · Opened Apr 7, 2025
[SPIR-V] can't decorate a struct or type properly Open

bug needs-triage spirv

microsoft/DirectXShaderCompiler#7317 · 1 assignee · Opened Apr 7, 2025
Use VCPKG manifest mode for directx-headers instead of a submodule Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

microsoft/DirectXShaderCompiler#7296 · 1 reaction · Opened Apr 2, 2025
Bad entries in g_uBasicKindProps table in SemaHLSL.cpp Open

bug tech-debt

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#7293 · Opened Apr 1, 2025
[SPIR-V] SIGSEGV when copying template types from constant buffers into local variables Open

bug spirv

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7288 · 1 comment · Opened Apr 1, 2025
Potential issue merging resource coherency states Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/DirectXShaderCompiler#7283 · Opened Mar 31, 2025
[SPIR-V] Intrinsics which are Termination Instructions fail Legalizations Open

bug spirv

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7279 · 3 comments · Opened Mar 31, 2025
[Azure pipelines] Too high CMake 4.x version Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7275 · 1 comment · Opened Mar 29, 2025
lib/MC/MCSchedule.cpp uses deprecated is_pod Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 54/100

microsoft/DirectXShaderCompiler#7267 · Opened Mar 27, 2025
[SPIR-V] Crash when using local struct with ByteAddressBuffer/StructuredBuffer memeber and -fspv-debug=vulkan-with-source Open

bug spirv

microsoft/DirectXShaderCompiler#7264 · 2 comments · 1 assignee · Opened Mar 26, 2025
Incorrect element index when accessing matrix in `cbuffer` Open

bug matrix-bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#7253 · 1 comment · Opened Mar 24, 2025
[SPIR-V] `-fspv-debug=vulkan-with-source` SIGSEGVs compiler Open

bug spirv

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/DirectXShaderCompiler#7232 · 1 comment · Opened Mar 20, 2025
[202x] [0022] Loop Unroll Factor Open

enhancement hlsl-next

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/DirectXShaderCompiler#7219 · Opened Mar 18, 2025
[202x] [0003] Numeric Constants Open

enhancement hlsl-next

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/DirectXShaderCompiler#7218 · Opened Mar 18, 2025
No error emitted when declaring RayQuery object in constant buffer Open

bug diagnostic incorrect-code

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#7203 · Opened Mar 14, 2025
ClangHLSLTests crashed on apple silicon Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7192 · Opened Mar 11, 2025
[SPIR-V] `static` variables always get nullinitialized Open

bug spirv

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#7189 · 1 comment · Opened Mar 10, 2025
Resources in entry function parameters causes compiler crash Open

bug incorrect-code

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#7186 · Opened Mar 10, 2025
[Feature Request] Enable SM 6.7 and 6.8 in properties dropdown list in VS2022 Open

enhancement

microsoft/DirectXShaderCompiler#7185 · 2 comments · 1 assignee · Opened Mar 9, 2025
[Feature Request] What's the way to set `OpMemoryModel` ? Open

enhancement

microsoft/DirectXShaderCompiler#7180 · 5 comments · 1 assignee · Opened Mar 6, 2025

microsoft/DirectXShaderCompiler

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