Repository navigation
[SPIR-V] DXC SPIR-V test fail with the latest spir-v tools #8740
Description
Description
Since KhronosGroup/SPIRV-Tools#6792, some of the tests related to descriptor heaps have started to fail.
Steps to Reproduce
Check out the latest DXC source.
Update the submodule using the top-of-tree SPIR-V tools.
Run the codegenspirv tests.
There are two failures. Here is the output of one of them:
FAIL: Clang :: CodeGenSPIRV/resource-heap-ext-texture.hlsl (829 of 1566)
******************** TEST 'Clang :: CodeGenSPIRV/resource-heap-ext-texture.hlsl' FAILED ********************
Script:
--
/tmp/dxc/build/./bin/dxc -T cs_6_6 -E main -fspv-use-descriptor-heap -spirv /tmp/dxc/tools/clang/test/CodeGenSPIRV/resource-heap-ext-texture.hlsl | /tmp/dxc/build/./bin/FileCheck /tmp/dxc/tools/clang/test/CodeGenSPIRV/resource-heap-ext-texture.hlsl
--
Exit Code: 2
Command Output (stderr):
--
...
fatal error: generated SPIR-V is invalid: Array must be explicitly laid out with ArrayStride or ArrayStrideIdEXT decorations. Instantiated via '36[%36]' in the UniformConstant storage class using standard layout rules.
This is may be allowed if you enable the scalarBlockLayout feature (or use the --scalar-block-layout command line flag)
%_runtimearr_type_2d_image = OpTypeRuntimeArray %type_2d_image
note: please file a bug report on https://github.com/Microsoft/DirectXShaderCompiler/issues with source code if possible
FileCheck error: '-' is empty.
Actual Behavior
There is a validation error. See above.
Environment
- DXC version: latest main
- Host Operating System: all
Activity
[-][SPIR-V][/-][+][SPIR-V] DXC SPIR-V test fail with the latest spir-v tools[/+]dnovillo commentedon Aug 6, 2026
Gregory Roth (@pow2clk) would you be able to take a look? Thanks.
pow2clk commentedon Aug 6, 2026
KhronosGroup/SPIRV-Tools#6792 is the cause. Not sure it's faulty, but it succeeds without that change
damyanp commentedon Aug 6, 2026
I was going to just disable this test in #8738, since it looks like there's a pending PR to remove it in #8517.
Update SPIRV-Tools to 1c336172 (#8738)