[NV][DirectX] Tests `Feature/HLSLLib/firstbitlow.64.test` and `Feature/HLSLLib/firstbithigh.64.test` fail under `windows-nvidia` for build target `check-hlsl-d3d12`

[Icohedron]

The tests Feature/HLSLLib/firstbitlow.64.test and Feature/HLSLLib/firstbithigh.64.test fail on the GitHub Actions Runner windows-nvidia when building target check-hlsl-d3d12.

Appears related to #319

Logs:

FAIL: OffloadTest-d3d12 :: Feature/HLSLLib/firstbithigh.64.test (54 of 153)
******************** TEST 'OffloadTest-d3d12 :: Feature/HLSLLib/firstbithigh.64.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 102
c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\split-file.exe C:\actions-runner\_work\offload-test-suite\offload-test-suite\OffloadTest\test\Feature\HLSLLib\firstbithigh.64.test C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp
# executed command: 'c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\split-file.exe' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\OffloadTest\test\Feature\HLSLLib\firstbithigh.64.test' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp'
# RUN: at line 103
"C:\actions-runner\_work\offload-test-suite\offload-test-suite\DXC\build\bin\dxc.exe" -T cs_6_5 -Fo C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp.o C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp/source.hlsl
# executed command: 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\DXC\build\bin\dxc.exe' -T cs_6_5 -Fo 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp.o' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp/source.hlsl'
# RUN: at line 104
c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\offloader.exe C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp/pipeline.yaml C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp.o
# executed command: 'c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\offloader.exe' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp/pipeline.yaml' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbithigh.64.test.tmp.o'
# .---command stdout------------
# | Using DirectX API
# | Configuring execution on device: NVIDIA GeForce RTX 5070
# | RootSignature created.
# | Descriptor heap created.
# `-----------------------------
# .---command stderr------------
# | gpu-exec: error: Failed to create PSO.
# `-----------------------------
# error: command failed with exit status: 1

--

FAIL: OffloadTest-d3d12 :: Feature/HLSLLib/firstbitlow.64.test (57 of 153)
******************** TEST 'OffloadTest-d3d12 :: Feature/HLSLLib/firstbitlow.64.test' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 89
c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\split-file.exe C:\actions-runner\_work\offload-test-suite\offload-test-suite\OffloadTest\test\Feature\HLSLLib\firstbitlow.64.test C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp
# executed command: 'c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\split-file.exe' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\OffloadTest\test\Feature\HLSLLib\firstbitlow.64.test' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp'
# RUN: at line 90
"C:\actions-runner\_work\offload-test-suite\offload-test-suite\DXC\build\bin\dxc.exe" -T cs_6_5 -Fo C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp.o C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp/source.hlsl
# executed command: 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\DXC\build\bin\dxc.exe' -T cs_6_5 -Fo 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp.o' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp/source.hlsl'
# RUN: at line 91
c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\offloader.exe C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp/pipeline.yaml C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp.o
# executed command: 'c:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\bin\offloader.exe' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp/pipeline.yaml' 'C:\actions-runner\_work\offload-test-suite\offload-test-suite\llvm-project\build\tools\OffloadTest\test\d3d12\Feature\HLSLLib\Output\firstbitlow.64.test.tmp.o'
# .---command stdout------------
# | Using DirectX API
# | Configuring execution on device: NVIDIA GeForce RTX 5070
# | RootSignature created.
# | Descriptor heap created.
# `-----------------------------
# .---command stderr------------
# | gpu-exec: error: Failed to create PSO.
# `-----------------------------
# error: command failed with exit status: 1

--

********************

[joaosaffran]

After investigating, we notice that the crash was happening inside a module of nvidia driver. We file a bug with them, and we are now waiting for them to further investigate this. Internal bug 59837517 created to keep track of this.