Assertion failed 'IsBaselineSimdIsaSupportedDebugOnly()' #66205
Description
Many tests in the "runtime-coreclr jitstress-isas-x86" pipeline on x64 fail with this, e.g. JIT\opt\Vectorization\UnrollEqualsStartsWIth\UnrollEqualsStartsWIth.cmd in CoreCLR windows x64 Checked jitstress_isas_x86_nosse2:
Assert failure(PID 4388 [0x00001124], Thread: 404 [0x0194]): Assertion failed 'IsBaselineSimdIsaSupportedDebugOnly()' in 'Tests_len14_9:Test_tst_32(System.String):bool' during 'Importation' (IL size 22; hash 0x1efa538e; FullOpts)
File: D:\a\_work\1\s\src\coreclr\jit\gentree.cpp Line: 18178
Image: C:\h\w\AF720924\p\corerun.exe
Return code: 1
Raw output file: C:\h\w\AF720924\w\B4E30A89\uploads\Reports\JIT.opt\Vectorization\UnrollEqualsStartsWIth\UnrollEqualsStartsWIth.output.txt
Raw output:
BEGIN EXECUTION
"C:\h\w\AF720924\p\corerun.exe" -p "System.Reflection.Metadata.MetadataUpdater.IsSupported=false" UnrollEqualsStartsWIth.dll
Expected: 100
Actual: -1073740286
END EXECUTION - FAILED
FAILED
Test Harness Exitcode is : 1
To run the test:
set CORE_ROOT=C:\h\w\AF720924\p
C:\h\w\AF720924\w\B4E30A89\e\JIT\opt\Vectorization\UnrollEqualsStartsWIth\UnrollEqualsStartsWIth.cmd
Expected: True
Actual: False
@tannergooding @dotnet/jit-contrib