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

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641 open issues indexed

[SM6.10][LinAlg] dx::linalg::Multiply takes the vector interpretation from the matrix type Open

bug needs-triage

microsoft/DirectXShaderCompiler#8933 · 1 assignee · Opened Sep 17, 2026
[202x][0018] Implement user-defined conversion functions Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#8925 · Opened Sep 15, 2026
[202x][0016] Implement non-member operator overloading Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#8924 · Opened Sep 15, 2026
[202x][0015] Implement `const`-qualified non-static member functions Open

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

microsoft/DirectXShaderCompiler#8923 · Opened Sep 15, 2026
[202x][0013] Implement named casts proposal Open

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

microsoft/DirectXShaderCompiler#8919 · Opened Sep 14, 2026
[202x][0009] Implement `hlsl` namespace Open

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

microsoft/DirectXShaderCompiler#8918 · Opened Sep 14, 2026
Release 1.9.2609 Open

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

microsoft/DirectXShaderCompiler#8916 · Opened Sep 12, 2026
[202x][0010] Implement `static_assert` Open

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

microsoft/DirectXShaderCompiler#8910 · Opened Sep 11, 2026
[202x][0010] Implement `constexpr` Open

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

microsoft/DirectXShaderCompiler#8909 · Opened Sep 11, 2026
[202x][0010] Implement `decltype` keyword Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#8907 · Opened Sep 11, 2026
[202x][0010] Implement variable templates Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#8906 · Opened Sep 11, 2026
[202x][0010] Implement variadic templates Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

microsoft/DirectXShaderCompiler#8905 · Opened Sep 11, 2026
[202x] Implement proposal 0010 - Modern C++ features Open

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

microsoft/DirectXShaderCompiler#8904 · Opened Sep 11, 2026
[202x] `auto` return types for normal functions Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

microsoft/DirectXShaderCompiler#8903 · Opened Sep 11, 2026
[SPIR-V] Requesting useless OpCapability StoragePushConstant16 when using vk::BufferPointer Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8895 · 1 comment · Opened Sep 9, 2026
[SM6.9] Invalid DXIL generation Open

bug needs-triage

microsoft/DirectXShaderCompiler#8894 · 1 assignee · Opened Sep 9, 2026
[SPIR-V] Emit `OpacityMicromapIdKHR` execution mode for OMM-enabled `RayQuery` Open

bug needs-triage spirv

Difficulty 5/5 Over a week Newbie friendliness 42/100

microsoft/DirectXShaderCompiler#8889 · Opened Sep 8, 2026
[SPIR-V] Please considering emitting SPV_KHR_compute_shader_derivatives extension conditionally Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8886 · Opened Sep 5, 2026
[SPIR-V] Semantic index limits for system values are not enforced on -spirv path Open

bug needs-triage spirv

Difficulty 4/5 3-5 days Newbie friendliness 58/100

microsoft/DirectXShaderCompiler#8878 · Opened Sep 3, 2026
PIX validation fallback should inspect canonical DXIL Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 76/100

microsoft/DirectXShaderCompiler#8873 · Opened Sep 2, 2026
`InterlockedCompareStoreFloatBitwise` intrinsic function unimplemented Open

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

microsoft/DirectXShaderCompiler#8864 · Opened Aug 31, 2026
[SPIR-V] DXC crashes during the internal `spirv-opt` validation pass. Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8861 · Opened Aug 31, 2026
[SPIR-V] sign() codegen uses incorrect vector size for non-square uint matrices with at least two rows/columns Open

bug needs-triage spirv

Difficulty 3/5 1-2 days Newbie friendliness 62/100

microsoft/DirectXShaderCompiler#8860 · 1 comment · Opened Aug 30, 2026
[SPIR-V] sign() on uint matrices with at least two rows and two columns constructs an unsigned result array Open

bug needs-triage spirv

Difficulty 3/5 1-2 days Newbie friendliness 58/100

microsoft/DirectXShaderCompiler#8858 · Opened Aug 30, 2026
[SPIR-V] Integer bitfield is emitted into seperate storage slot, breaking array stride Open

bug needs-triage spirv

Difficulty 3/5 1-2 days Newbie friendliness 50/100

microsoft/DirectXShaderCompiler#8857 · Opened Aug 28, 2026
failed to legalize SPIR-V: Variable cannot be replaced: invalid index on embedded loop Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8832 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap Direct-subscript buffer return bypasses heap alias rejection diagnostic Open

bug needs-triage spirv

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

microsoft/DirectXShaderCompiler#8831 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap SPV_NV_ray_tracing accepted for AS heap stride but RayTracingNV capability not emitted for non-RT shaders Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8830 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap RasterizerOrdered flag lost on heap buffer alias re-derivation, suppressing ROV interlock Open

bug needs-triage spirv

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

microsoft/DirectXShaderCompiler#8829 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap Counter operation on directly-cast heap buffer hits wrong fatal error Open

bug needs-triage spirv

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

microsoft/DirectXShaderCompiler#8828 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap Heap alias assignment returns nullptr in expression context, propagating crash Open

bug needs-triage spirv

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

microsoft/DirectXShaderCompiler#8827 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap Heap buffer alias function-argument error path returns nullptr for void-returning callees Open

bug needs-triage spirv

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

microsoft/DirectXShaderCompiler#8826 · Opened Aug 25, 2026
[SPIR-V] SPV_EXT_descriptor_heap: Remove error diagnostic for discarded descriptor heap indexing` Open

bug needs-triage spirv

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

microsoft/DirectXShaderCompiler#8823 · Opened Aug 24, 2026
dxilconv: Concurrent first calls to IDxbcConverter::Convert cause a race during LLVM pass registration Open

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

microsoft/DirectXShaderCompiler#8819 · Opened Aug 21, 2026
[SM6.10] GS vector types incorrectly rejected in *Memory builtins Open

microsoft/DirectXShaderCompiler#8814 · 1 assignee · Opened Aug 20, 2026
LinAlg Validation Bugs Open

microsoft/DirectXShaderCompiler#8811 · 1 assignee · Opened Aug 19, 2026
[DXIL] Crash when a function output parameter of a matrix type requires a cast to another matrix type of equal dimensions (e.g., float3x3 -> half3x3) Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8809 · Opened Aug 19, 2026
[SPIR-V] SPV_EXT_descriptor_heap: StructuredBuffer<T> from ResourceDescriptorHeap yields incorrect error: UAV support not implemented with non-emulated heaps Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8806 · 1 comment · 1 reaction · Opened Aug 19, 2026
[SPIR-V] Implement matrix comparisons Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8796 · Opened Aug 18, 2026
Investigate failure of CodeGenFloatingPointEnvironment under x64 ARM64 emulation Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8795 · Opened Aug 18, 2026
CompilerTestCodeGenFloatingPointEnvironment fails on ARM64x when run under x64 emulation Open

bug needs-triage

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

microsoft/DirectXShaderCompiler#8793 · Opened Aug 18, 2026
[HLSL 202x] Deprecations Open

microsoft/DirectXShaderCompiler#8791 · 1 assignee · Opened Aug 17, 2026
[HLSL 202x] CBuffer Contexts Open

microsoft/DirectXShaderCompiler#8790 · 1 assignee · Opened Aug 17, 2026
[SPIR-V] SPV_EXT_descriptor_heap: cross-function heap buffer/image alias propagation not implemented, passing or returning a heap alias is rejected or miscompiles Open

bug needs-triage spirv

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/DirectXShaderCompiler#8784 · Opened Aug 17, 2026
[SPIR-V] DXC is ignoring include handler when searching for the source to embed into SPIRV. Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8781 · Opened Aug 15, 2026
Linux binaries for release-v1.9.2607 contain a lot that shouldn't be there Open

bug needs-triage

microsoft/DirectXShaderCompiler#8770 · 1 comment · 1 assignee · Opened Aug 12, 2026
[Debug Info] Work graph node input/output objects have no usable debug info Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8758 · Opened Aug 10, 2026
[SM6.10] LinAlg execution tests: wave size, ColumnMajor and uniform-expectation coverage gaps Open

test

Difficulty 4/5 3-5 days Newbie friendliness 55/100

microsoft/DirectXShaderCompiler#8756 · 1 comment · Opened Aug 10, 2026
[Debug info] Mesh shader `vertices[]` / `primitives[]` / `indices[]`: missing or wrongly-offset debug info Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8754 · 2 comments · Opened Aug 10, 2026
[Debug info] TraceRay payload: no `dbg.declare` on the payload alloca, stale field values after the call Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8753 · Opened Aug 10, 2026

microsoft/DirectXShaderCompiler

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