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

Open All

641 open issues indexed

[SPIR-V] fail to generate type when using namespaced struct. Open

bug needs-triage spirv

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/DirectXShaderCompiler#8342 · Opened Apr 6, 2026
[SPIR-V] Compiler crash when passing empty ConstantBuffer to a function Open

bug needs-triage spirv

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/DirectXShaderCompiler#8340 · Opened Apr 6, 2026
[SPIR-V] Compiler crash with static ResourceDescriptorHeap (lib_6_6 target) Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8339 · Opened Apr 6, 2026
[SPIR-V] `fma` emits `GLSL.std.450 Fma` instead of `OpFmaKHR` Open

bug needs-triage spirv

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/DirectXShaderCompiler#8330 · 7 comments · Opened Apr 2, 2026
[SM6.10] Use consistent naming for ComponentType parameters Open

microsoft/DirectXShaderCompiler#8318 · 1 assignee · Opened Mar 31, 2026
[SM6.10][Cleanup] LinAlg Validation tests probably shouldn't list passing cases Open

microsoft/DirectXShaderCompiler#8315 · 1 assignee · Opened Mar 30, 2026
Front-end should widen min-precision stores to full precision during Clang CodeGen Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/DirectXShaderCompiler#8314 · Opened Mar 30, 2026
[SPIR-V] support externally initialized non-floating-point column-major matrices Open

bug needs-triage spirv

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/DirectXShaderCompiler#8302 · Opened Mar 26, 2026
[SPIR-V] Support global structures containing buffers Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8301 · Opened Mar 26, 2026
[SM6.10] Groupshared parameter into builtin incorrectly marked const Open

microsoft/DirectXShaderCompiler#8270 · 1 assignee · Opened Mar 17, 2026
[Validator] Improved diagnostics for InstrOpConstRange failures Open

enhancement validation

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

microsoft/DirectXShaderCompiler#8266 · Opened Mar 13, 2026
[SPIR-V] Push constant of a derived struct causes multiple fatal errors Open

bug spirv

microsoft/DirectXShaderCompiler#8247 · 1 assignee · Opened Mar 9, 2026
[SPIR-V] SPV_EXT_descriptor_heap extension support Open

enhancement spirv

microsoft/DirectXShaderCompiler#8243 · 3 comments · 1 reaction · 1 assignee · Opened Mar 8, 2026
Exit() are present in the shared libraries Open

bug

microsoft/DirectXShaderCompiler#8231 · 1 reaction · 2 assignees · Opened Mar 6, 2026
Various typos in the codebase Open

bug low-hanging-fruit

microsoft/DirectXShaderCompiler#8230 · 1 reaction · 2 assignees · Opened Mar 6, 2026
[Feature Request] [SPIRV] Support `SPV_EXT_shader_invocation_reorder` Open

enhancement

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

microsoft/DirectXShaderCompiler#8226 · 7 comments · 2 reactions · Opened Mar 5, 2026
[DirectX] Performing a `mul` between two double vectors produces invalid DXIL Open

bug

microsoft/DirectXShaderCompiler#8208 · 1 comment · 1 reaction · 2 assignees · Opened Feb 26, 2026
Force `-enable-16bit-types` for SM 6.9 and above Open

enhancement

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

microsoft/DirectXShaderCompiler#8203 · 1 reaction · Opened Feb 25, 2026
Long vector tests fail on x86 for 64-bit left/right shift operations Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 58/100

microsoft/DirectXShaderCompiler#8178 · Opened Feb 19, 2026
[SPIR-V] 16-bit stores emit 32-bit stores with masking Open

bug spirv

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

microsoft/DirectXShaderCompiler#8172 · 5 comments · Opened Feb 19, 2026
[SPIR-V] Segfault when emitting NonSemantic.Shader.DebugInfo.100 for uninstantiated/incomplete type template parameter Open

bug spirv

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

microsoft/DirectXShaderCompiler#8155 · 2 comments · Opened Feb 12, 2026
Crash: cast<X>() error when two func call in together! but only any one is Success Open

bug diagnostic incorrect-code

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

microsoft/DirectXShaderCompiler#8150 · 2 comments · Opened Feb 10, 2026
DXIL Validator fails to catch reserved OpCode Open

bug

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

microsoft/DirectXShaderCompiler#8144 · Opened Feb 5, 2026
[ScopeNestedCFG] Basic Blocks are cloned when containing convergent ops Open

bug

microsoft/DirectXShaderCompiler#8141 · 1 comment · 1 assignee · Opened Feb 5, 2026
[Feature Request] Make preview-release for mesh nodes with SPIR-V Open

enhancement

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

microsoft/DirectXShaderCompiler#8135 · Opened Feb 4, 2026
[DirectX] compute shader errors when indexing cbuffer matrix with non constant index. Open

bug

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

microsoft/DirectXShaderCompiler#8131 · 1 comment · Opened Feb 3, 2026
[SPIR-V] DXC emits OpLogicalAnd on an invalid type of array of bool vectors Open

bug spirv

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

microsoft/DirectXShaderCompiler#8129 · 2 comments · Opened Feb 3, 2026
[SPIR-V] Crash observed while processing TraceRay intrinsic when the payload argument is a MemberExpr Open

bug spirv

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/DirectXShaderCompiler#8128 · Opened Feb 2, 2026
Windows release include static crt(MT) builds Open

bug

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

microsoft/DirectXShaderCompiler#8118 · Opened Jan 30, 2026
Generating depfile fails with "Internal Compiler error" Open

bug spirv

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

microsoft/DirectXShaderCompiler#8115 · 1 comment · Opened Jan 29, 2026
[SPIR-V] Cannot cast initializer type 'int' into variable type 'RaytracingAccelerationStructure' Open

bug spirv

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

microsoft/DirectXShaderCompiler#8111 · Opened Jan 29, 2026
DXC can sink and duplicate SetMeshOutputCounts if the inputs are computed within a scalar branch Open

bug correctness

microsoft/DirectXShaderCompiler#8104 · 4 comments · 1 assignee · Opened Jan 27, 2026
Docs need updating for HLSL 2021 Open

docs

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

microsoft/DirectXShaderCompiler#8095 · Opened Jan 23, 2026
Optimizer incorrectly transforms sdiv to udiv when divisor is shifted INT_MIN Open

bug correctness

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

microsoft/DirectXShaderCompiler#8094 · Opened Jan 23, 2026
Derived struct cannot be passed as `inout` parameter of base struct in function Open

bug

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

microsoft/DirectXShaderCompiler#8087 · 4 comments · Opened Jan 22, 2026
Shutdown crash in SPIRV-tools due to allocator mismatch Open

bug

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

microsoft/DirectXShaderCompiler#8086 · 2 comments · Opened Jan 21, 2026
[SPIR-V] Reading a ConstantBuffer from the ResourceDescriptorHeap in the global scope crashes in hit shaders Open

bug spirv

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

microsoft/DirectXShaderCompiler#8085 · 1 comment · Opened Jan 21, 2026
[SPIR-V] Incorrect RowMajor decoration emitted by DXC Open

bug spirv

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

microsoft/DirectXShaderCompiler#8080 · Opened Jan 20, 2026
[SPIR-V] fatal error: generated SPIR-V is invalid: ID '403[%403]' has not been defined Open

bug spirv

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

microsoft/DirectXShaderCompiler#8077 · Opened Jan 18, 2026
Review logic of skipping exec tests when hw doesn't support a feature Open

bug

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

microsoft/DirectXShaderCompiler#8061 · Opened Jan 15, 2026
Execution test improvements - Post SM 6.9 release Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

microsoft/DirectXShaderCompiler#8055 · Opened Jan 13, 2026
Crash when function named in patchconstantfun does not exist Open

bug crash incorrect-code

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

microsoft/DirectXShaderCompiler#8046 · 5 comments · Opened Jan 6, 2026
Zero initializing array of struct causes error: cast<X>() argument of incompatible type! Open

bug crash

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

microsoft/DirectXShaderCompiler#8044 · Opened Jan 6, 2026
[Feature Request] Add info for the Winget package. Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

microsoft/DirectXShaderCompiler#8025 · 1 comment · Opened Dec 25, 2025
[SPIR-V] Array containing a Block or BufferBlock must not be decorated with ArrayStride Open

bug spirv

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

microsoft/DirectXShaderCompiler#8023 · Opened Dec 25, 2025
[SPIR-V] Comparison and bitwise operators over matrices are not implemented Open

bug spirv

microsoft/DirectXShaderCompiler#8021 · 1 assignee · Opened Dec 23, 2025
[Feature Request] [SPIR-V] Allow more than one push constant struct in Library shaders Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/DirectXShaderCompiler#8019 · 6 comments · Opened Dec 22, 2025
[SPIR-V] DXC generates invalid SPIRV for multiple entry points Open

bug spirv

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

microsoft/DirectXShaderCompiler#8009 · 3 comments · Opened Dec 16, 2025
[Feature Request] [SPIR-V] `vk::ext_decorate` on return types of Inline SPIR-V Intrinsics or functions In general Open

enhancement

microsoft/DirectXShaderCompiler#8000 · 1 assignee · Opened Dec 11, 2025
[SPIR-V] -fspv-preserve-interface fails to work if -fspv-flatten-resource-arrays is also specified Open

bug needs-triage spirv

microsoft/DirectXShaderCompiler#7982 · 2 comments · 1 assignee · Opened Dec 5, 2025

microsoft/DirectXShaderCompiler

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