Issues

[SM 6.9/6.10] GVN emits invalid i128 for loop-carried float4-to-uint4 forwarding

microsoft/DirectXShaderCompiler#9040 · opened

on Oct 16, 2026

2

CorrelatedValuePropagation generates illegal i10 integer width in DXIL

microsoft/DirectXShaderCompiler#9039 · opened

on Oct 15, 2026

[SPIR-V] required execution mode for FragStencilRefEXT is missing

microsoft/DirectXShaderCompiler#9038 · opened

on Oct 15, 2026

[SPIR-V] SPV_NV_mesh_shader can produce invalid SPIR-V

microsoft/DirectXShaderCompiler#9037 · opened

on Oct 15, 2026

[SPIR-V] Fix SPV_NV_mesh_shader PrimitiveCountNV bugs

microsoft/DirectXShaderCompiler#9036 · opened

on Oct 15, 2026

[SPIR-V] Fix mesh shader output reads with SPV_NV_mesh_shader

microsoft/DirectXShaderCompiler#9035 · opened

on Oct 15, 2026

[SPIR-V] Mesh shader output writes are dropped or produce invalid SPIR-V

microsoft/DirectXShaderCompiler#9033 · opened

on Oct 15, 2026

1

[SPIR-V] Incorrect GatherRed/GatherGreen/GatherBlue/GatherAlpha texel selection with four compile-time constant offsets

microsoft/DirectXShaderCompiler#9031 · opened

on Oct 15, 2026

error: llvm::cast<X>() argument of incompatible type! only with ShaderModel 6.6 and above

microsoft/DirectXShaderCompiler#9028 · opened

on Oct 13, 2026

[SPIR-V] Compile the original source with -fspv-debug instead of the -P output

microsoft/DirectXShaderCompiler#9022 · opened

on Oct 9, 2026

3

[SPIR-V] early return with ROV will generate spirv that hung the gpu (or at least weird spirv)

microsoft/DirectXShaderCompiler#9020 · opened

on Oct 9, 2026

[SPIR-V] SPV_EXT_descriptor_heap crashes, or miscompiles shaders that work in emulated mode (images, buffers, ConstantBuffer, counters)

microsoft/DirectXShaderCompiler#9019 · opened

on Oct 8, 2026

1

[SPIR-V] -fvk-use-dx-layout doesn't apply DirectX cbuffer layout to [[vk::push_constant]] blocks

microsoft/DirectXShaderCompiler#9018 · opened

on Oct 7, 2026

[SPIR-V] -fvk-use-dx-layout places cbuffer matrices with double columns at a different offset than DXIL

microsoft/DirectXShaderCompiler#9017 · opened

on Oct 7, 2026

cbuffer with a double2x2/double2x3 matrix generates a cbufferLoadLegacy past the end of the cbuffer ("Cbuffer access out of bound")

microsoft/DirectXShaderCompiler#9016 · opened

on Oct 7, 2026

IDxcLinker doesn't copy the module data layout, so reflection of linked StructuredBuffer elements misplaces 64-bit integer members

microsoft/DirectXShaderCompiler#9015 · opened

on Oct 7, 2026

GCC 14.1/14.2 at -O2/-O3 miscompile resource component types (Texture2D<float4> becomes 4xU32)

microsoft/DirectXShaderCompiler#9014 · opened

on Oct 7, 2026

IDxcLinker output loses cbuffer variable layout in reflection unless input libs are compiled with -Qkeep_reflect_in_dxil

microsoft/DirectXShaderCompiler#9013 · opened

on Oct 7, 2026

SM 6.10 thread-scope LinAlg operation crashes in DXR closest-hit shader

Bug

microsoft/DirectXShaderCompiler#9012 · opened

on Oct 7, 2026

[SPIR-V] -Zi: OpSource text is read from the working directory (and dxcompiler is dlopen'ed) instead of using the in-memory source

microsoft/DirectXShaderCompiler#9000 · opened

on Oct 4, 2026

Linux: libdxcompiler replaces the host's signal handlers (SA_RESETHAND) on in-process DXIL compile and -P

microsoft/DirectXShaderCompiler#8999 · opened

on Oct 4, 2026

[SPIR-V] Track lack of support for SPV_EXT_long_vector

microsoft/DirectXShaderCompiler#8996 · opened

on Oct 1, 2026

TimeValue.h fails to compile as C++26 with Clang 22

microsoft/DirectXShaderCompiler#8992 · opened

on Sep 30, 2026

[SPIR-V] GetVertexAttribute with -pack-optmized does not generate good type

microsoft/DirectXShaderCompiler#8990 · opened

on Sep 30, 2026

[202x][0013] Implement `bit_cast`

microsoft/DirectXShaderCompiler#8979 · opened

on Sep 29, 2026

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Issues

[SM 6.9/6.10] GVN emits invalid i128 for loop-carried float4-to-uint4 forwarding

CorrelatedValuePropagation generates illegal i10 integer width in DXIL

[SPIR-V] required execution mode for FragStencilRefEXT is missing

[SPIR-V] SPV_NV_mesh_shader can produce invalid SPIR-V

[SPIR-V] Fix SPV_NV_mesh_shader PrimitiveCountNV bugs

[SPIR-V] Fix mesh shader output reads with SPV_NV_mesh_shader

[SPIR-V] Mesh shader output writes are dropped or produce invalid SPIR-V

[SPIR-V] Incorrect GatherRed/GatherGreen/GatherBlue/GatherAlpha texel selection with four compile-time constant offsets

error: llvm::cast<X>() argument of incompatible type! only with ShaderModel 6.6 and above

[SPIR-V] Compile the original source with -fspv-debug instead of the -P output

[SPIR-V] early return with ROV will generate spirv that hung the gpu (or at least weird spirv)

[SPIR-V] SPV_EXT_descriptor_heap crashes, or miscompiles shaders that work in emulated mode (images, buffers, ConstantBuffer, counters)

[SPIR-V] -fvk-use-dx-layout doesn't apply DirectX cbuffer layout to [[vk::push_constant]] blocks

[SPIR-V] -fvk-use-dx-layout places cbuffer matrices with double columns at a different offset than DXIL

cbuffer with a double2x2/double2x3 matrix generates a cbufferLoadLegacy past the end of the cbuffer ("Cbuffer access out of bound")

IDxcLinker doesn't copy the module data layout, so reflection of linked StructuredBuffer elements misplaces 64-bit integer members

GCC 14.1/14.2 at -O2/-O3 miscompile resource component types (Texture2D<float4> becomes 4xU32)

IDxcLinker output loses cbuffer variable layout in reflection unless input libs are compiled with -Qkeep_reflect_in_dxil

SM 6.10 thread-scope LinAlg operation crashes in DXR closest-hit shader

[SPIR-V] -Zi: OpSource text is read from the working directory (and dxcompiler is dlopen'ed) instead of using the in-memory source

Linux: libdxcompiler replaces the host's signal handlers (SA_RESETHAND) on in-process DXIL compile and -P

[SPIR-V] Track lack of support for SPV_EXT_long_vector

TimeValue.h fails to compile as C++26 with Clang 22

[SPIR-V] GetVertexAttribute with -pack-optmized does not generate good type

[202x][0013] Implement `bit_cast`