Arm64: use FEAT_CSSC cnt/ctz for PopCount and TrailingZeroCount - #130332

Merged

EgorBo merged 7 commits into

mainfrom

egorbo/arm64-cssc-popcnt-tzc

Jul 12, 2026

Build Analysis / Build Analysis succeeded Jul 11, 2026 in 0s

.NET Result Analysis

Details

‼️ Build Analysis Check Result has been manually overridden

The build analysis check result has been updated by the user for the following reason: wasm is heavily broken on ci
The check result has changed from Failure to Success

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⚠️ The following pipeline(s) will not be analyzed as has been explicited excluded from analysis

Known Infrastructure Errors

20260710.159 / Build / osx-arm64 Debug Libraries_CheckedCoreCLR

slow macOS - "##[error]The job running on agent Azure Pipelines 9 ran longer than the maximum time of 60 minutes."

20260710.159 / Build / osx-arm64 Debug Libraries_CheckedCoreCLR / Publish Build Assets

The Operation will be canceled. The next steps may not contain expected logs.

Known test errors

iOS.CoreCLR.Interpreter.Test.WorkItemExecution

Helix: System.IO.IOException: No space left on device

Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.ReferenceNewAssembly

Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.ReferenceNewAssembly failure: Expected changed file: driver-gen.c

WBT-Workloads-MONO-ST-Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.WorkItemExecution

Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.ReferenceNewAssembly failure: Expected changed file: driver-gen.c

Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.ReferenceNewAssembly

Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.ReferenceNewAssembly failure: Expected changed file: driver-gen.c

WBT-NoWebcil-MONO-ST-Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.WorkItemExecution

Wasm.Build.NativeRebuild.Tests.ReferenceNewAssemblyRebuildTest.ReferenceNewAssembly failure: Expected changed file: driver-gen.c

System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode_BufferTooSmall

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode_WithFlags

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.GetUnicode_NoTranslationNeeded_ResultIsSameObjectAsInput

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.GetUnicode_Invalid

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode_EmptyBuffer

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.GetUnicode

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingGetUnicodeTests.TryGetUnicode_Invalid

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingIdnaConformanceTests.GetUnicode_Invalid

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

System.Globalization.Tests.IdnMappingIdnaConformanceTests.GetUnicode_Success

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

WasmTestOnChrome-CLR-ST-Batch-4.WorkItemExecution

[ci-scan] Test failure: System.Globalization.Tests.IdnMappingGetUnicodeTests DllNotFoundException 'libSystem.Globalization.Native' on browser-wasm CoreCLR

CoreMangLib.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Directed_1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Directed_3.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Exceptions.WorkItemExecution

Unable to pull image from mcr.microsoft.com

GC-scenarios1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

IL_Conformance.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Interop.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.CodeGenBringUpTests_d.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.CodeGenBringUpTests_do.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.CodeGenBringUpTests_r.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.CodeGenBringUpTests_ro.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.Generics.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.SIMD.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.opt.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT.performance.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT_d.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT_do.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT_others.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT_r.WorkItemExecution

Unable to pull image from mcr.microsoft.com

JIT_ro.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Loader.WorkItemExecution

Unable to pull image from mcr.microsoft.com

LoaderClassloaderRegressions.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Managed.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_d1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_d2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_do.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_others.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_r1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_r2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Methodical_ro.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_10.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_3.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_4.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_5.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_6.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_7.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_8.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_NoOptimize_d.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_NoOptimize_r_1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_PdbOnly_r.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_PdbOnly_r_1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_PdbOnly_r_2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_PdbOnly_r_3.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_PdbOnly_r_4.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_d.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_do.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_o_2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_o_3.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_r_1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_ro_1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regression_ro_2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Regressions.WorkItemExecution

Unable to pull image from mcr.microsoft.com

baseservices.WorkItemExecution

Unable to pull image from mcr.microsoft.com

baseservices-exceptions.WorkItemExecution

Unable to pull image from mcr.microsoft.com

jit64_1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

jit64_3.WorkItemExecution

Unable to pull image from mcr.microsoft.com

jit64_5.WorkItemExecution

Unable to pull image from mcr.microsoft.com

readytorun.WorkItemExecution

Unable to pull image from mcr.microsoft.com

readytorun_coreroot_determinism.WorkItemExecution

Unable to pull image from mcr.microsoft.com

reflection.WorkItemExecution

Unable to pull image from mcr.microsoft.com

threading_group1.WorkItemExecution

Unable to pull image from mcr.microsoft.com

threading_group2.WorkItemExecution

Unable to pull image from mcr.microsoft.com

Test Failures (15 tests failed)

🔹 [All failing tests from runtime]

⚠️ 14 failing tests not displayed for this pipeline due to space limitations

❌ Directed_2.WorkItemExecution [Console] [Details] [Artifacts] [0.29% failure rate]

[ 🚧 Create issue against infrastructure team] [ 📄 Create issue in this repo]

This is a helix work item crash with status: BadExit. To investigate look the [Console log] / navigate to [Helix Artifacts]

Failing Configuration

Ubuntu.2604.Amd64.Open

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