[browser] Wasm linux/windows HighResource LibrariestTests AOT are failing on build

[matouskozak]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=644416
Build error leg or test failing: Build product
Failing jobs on runtime-extra-platforms:

• browser-wasm windows Release LibraryTests_HighResource_AOT
• browser-wasm linux Release LibraryTests_HighResource_AOT

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorPattern": "Assertion at .*mini-llvm\\.c:6194, condition `lhs' not met",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=644416
Error message validated: [Assertion at .*mini-llvm\.c:6194, condition lhs' not met`]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/16/2024 6:29:40 AM UTC

Report

Build	Definition	Test	Pull Request
651298	dotnet/runtime	WasmTestOnChrome-System.Reflection.MetadataLoadContext.Tests.WorkItemExecution
649141	dotnet/runtime	WasmTestOnChrome-System.Reflection.MetadataLoadContext.Tests.WorkItemExecution
644416	dotnet/runtime	normal-System.Reflection.MetadataLoadContext.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	2	3

[matouskozak]

fyi: @lewing

[pavelsavara]

There are many more on this build

Log

/root/helix/work/correlation/build/wasm-shared/WasmApp.Common.targets(682,5): error : Precompiling failed for /root/helix/work/workitem/e/wasm_build/obj/wasm/for-build/aot-in/System.Private.CoreLib.dll with exit code 1. [/root/helix/work/workitem/e/publish/ProxyProjectForAOTOnHelix.proj]
/root/helix/work/correlation/build/wasm-shared/WasmApp.Common.targets(682,5): error : * Assertion at /__w/1/s/src/mono/mono/mini/mini-llvm.c:6194, condition `lhs' not met [/root/helix/work/workitem/e/publish/ProxyProjectForAOTOnHelix.proj]
/root/helix/work/correlation/build/wasm-shared/WasmApp.Common.targets(682,5): error : Aborted (core dumped) [/root/helix/work/workitem/e/publish/ProxyProjectForAOTOnHelix.proj]

To replicate, just run /azp run runtime-wasm, probably on any branch

[pavelsavara]

System.Reflection.MetadataLoadContext.Tests could be good candidate to add to the AOT smoke test, so that we would see it break on runtime pipeline

[radekdoulik]

In browser targeted build I see it assert on:

converting llvm method System.Runtime.Intrinsics.Vector64`1<uint16> System.Runtime.Intrinsics.Arm.AdvSimd:Abs (System.Runtime.Intrinsics.Vector64`1<int16>)
* Assertion at /Users/rodo/git/runtime/src/mono/mono/mini/mini-llvm.c:6194, condition `lhs' not met

There are 2 problems we need to solve.

1. The aot compiler is now failing to compile this method:

// System.Runtime.Intrinsics.Arm.AdvSimd
public static Vector64<ushort> Abs(Vector64<short> P_0)
{
	throw new PlatformNotSupportedException();
}

2. The System.Runtime.Intrinsics.Arm.AdvSimd should be linked away and it is not.

@vitek-karas what is the best way to find out why it was preserved during trimming? Still the illink analyzer or do we have some other way to find out?

[vitek-karas]

Set _TrimmerDumpDependencies=True and _TrimmerDependenciesFileFormat=dgml and then use https://github.com/dotnet/runtime/tree/main/src/coreclr/tools/aot/DependencyGraphViewer to inspect the file. Search for the symbol which was included (and shouldn't be) and then you can walk back to what kept it.