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

Precise vectors in 6.9+ are not treated as native Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8528 · Opened Jun 9, 2026
pragma once is case sensitive Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8527 · Opened Jun 8, 2026
[SPIR-V] Bitfields can cause wrong struct member access Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8526 · Opened Jun 7, 2026
[SPIR-V] debug info omits scope necessary for for-loops Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8514 · Opened Jun 3, 2026
[SPIR-V] Putting NonWritable/NonReadable on the Struct instead of Variable Open

bug needs-triage spirv

microsoft/DirectXShaderCompiler#8492 · 4 comments · 1 assignee · Opened May 30, 2026
DXC hits SIGSEGV when inner payload is passed to TraceRay Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8490 · Opened May 29, 2026
Empty bitfield reflection in DXIL Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8489 · Opened May 29, 2026
[202x][0005] Disallow `namespace` in `cbuffer` Open

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

microsoft/DirectXShaderCompiler#8484 · Opened May 27, 2026
[202x][0004] Error on cbuffer initializer Open

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

microsoft/DirectXShaderCompiler#8483 · Opened May 27, 2026
[202x][0004] Remove `uniform` and `shared` keywords Open

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

microsoft/DirectXShaderCompiler#8482 · Opened May 27, 2026
[202x][0004] Remove `interface` keyword Open

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

microsoft/DirectXShaderCompiler#8481 · Opened May 27, 2026
[202x] Implement TC57 Proposal [0004] - 202x Removals Open

hlsl-next needs-triage

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

microsoft/DirectXShaderCompiler#8479 · Opened May 27, 2026
SplitDouble producing transposed output in DXIL Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8477 · Opened May 27, 2026
[SPIR-V] Struct within Mesh Shader Vetex Output crashes spirv generation Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8475 · Opened May 26, 2026
[SPIR-V] Enum class bitfields are emitted into separate storage slots Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8470 · 1 reaction · Opened May 21, 2026
Address `LinAlg` overload feedback for intrinsics Open

microsoft/DirectXShaderCompiler#8468 · 1 assignee · Opened May 21, 2026
obvious dead code but that fails to be optimized Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8467 · Opened May 21, 2026
dxilconv.dll misconverts a shader with a dvec2 immediate. Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 50/100

microsoft/DirectXShaderCompiler#8466 · Opened May 21, 2026
[SPIR-V] -Gis causes multiple NoContraction Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8461 · Opened May 20, 2026
[SPIR-V] fatal error: generated SPIR-V is invalid: ID decorated with RelaxedPrecision multiple times is not allowed. Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8454 · Opened May 15, 2026
[SPIR-V] 64-bit RWByteAddressBuffer atomic methods are unimplemented Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8451 · Opened May 15, 2026
Validator should reject i8's Open

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

microsoft/DirectXShaderCompiler#8446 · Opened May 12, 2026
[SM6.10] Limit where the validator allows `dx.types.LinAlgMatrixXXXX` Open

microsoft/DirectXShaderCompiler#8443 · 1 assignee · Opened May 11, 2026
how can I single-step debug Work Graphs? Open

needs-triage user-support

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

microsoft/DirectXShaderCompiler#8437 · Opened May 9, 2026
IsHelperLane() emulation pre-SM 6.6 is broken Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8434 · 1 comment · Opened May 8, 2026
[SPIRV] Add support for -ffast-math Open

enhancement needs-triage spirv

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

microsoft/DirectXShaderCompiler#8430 · Opened May 7, 2026
Passing constant integer arguments to dst causes ICE Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8429 · Opened May 6, 2026
Passing `int4` constants to `dst` causes ICE Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8428 · Opened May 6, 2026
ddx/ddy fails to compile when passed a double literal Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8427 · Opened May 6, 2026
[SPIR-V] static const arrays lose their initializers in library mode Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8425 · Opened May 6, 2026
[SPIR-V] Compilation error: generated SPIR-V is invalid. Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8424 · 1 comment · Opened May 5, 2026
[SPIR-V] NoContraction from precise does not propagate to functions Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8423 · Opened May 5, 2026
IsHelperLane() software emulation doesn't account for sample rate shading Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8422 · Opened May 5, 2026
[SM6.10] Convert needs an overload that takes an InterpretedVector Open

microsoft/DirectXShaderCompiler#8418 · 2 comments · 1 assignee · Opened May 1, 2026
[SPIR-V] Cannot store to OpTypeImage, OpTypeSampler, OpTypeSampledImage, or OpTypeAccelerationStructureKHR objects Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8417 · 1 comment · Opened Apr 30, 2026
Improve robustness of `CShaderCodeParser::SetShader` to malformed inputs Open

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

microsoft/DirectXShaderCompiler#8406 · Opened Apr 24, 2026
[SPIR-V] Invalid SPIR-V when mutating struct using method and vk::BufferPointer Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8403 · Opened Apr 23, 2026
HLSL Packed types implicitly cast to float for many operations Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8399 · Opened Apr 22, 2026
LinAlg: restrict input vector component based on input ComponentEnum Open

bug needs-triage

microsoft/DirectXShaderCompiler#8398 · 1 assignee · Opened Apr 22, 2026
[SPIRV] OpAccessChain storage class mismatch when accessing resource member in struct array Open

spirv

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

microsoft/DirectXShaderCompiler#8384 · Opened Apr 16, 2026
[SPIRV] "Cannot load a runtime-sized array" when initializing local resource via comma expression Open

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

microsoft/DirectXShaderCompiler#8383 · 1 comment · Opened Apr 16, 2026
[SPIRV] Invalid OpCompositeConstruct when aggregate-initializing struct with resource member Open

spirv

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

microsoft/DirectXShaderCompiler#8382 · 2 comments · Opened Apr 16, 2026
[SPIRV] "casting to type 'RWByteAddressBuffer' unimplemented" when using ternary/phi with local resources Open

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

microsoft/DirectXShaderCompiler#8381 · 1 comment · Opened Apr 16, 2026
[SPIR-V] Invalid SPIR-V when using globallycoherent in conjunction with the Vulkan memory model Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8380 · Opened Apr 16, 2026
[SPIRV] DXC SPIRV OpStore type mismatch Open

bug needs-triage spirv

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

microsoft/DirectXShaderCompiler#8379 · Opened Apr 16, 2026
Improve SRV buffer flags in the LinAlg Execution Test Open

microsoft/DirectXShaderCompiler#8378 · 1 assignee · Opened Apr 16, 2026
[LinAlg] ComponentEnum for native vector inputs should not be based on matrix input Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8376 · Opened Apr 15, 2026
[SPIR-V] Invalid spirv: ResourceDescriptorHeap, ConstantBuffer, vk::RawBufferLoad Open

bug needs-triage spirv

microsoft/DirectXShaderCompiler#8373 · 1 comment · 1 assignee · Opened Apr 14, 2026
[6.10] [LinAlg] Dxil Ops should have read/write restrictions Open

bug needs-triage

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

microsoft/DirectXShaderCompiler#8363 · Opened Apr 10, 2026
LinAlg Convert Test signedness Open

microsoft/DirectXShaderCompiler#8355 · 1 assignee · Opened Apr 9, 2026

microsoft/DirectXShaderCompiler

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