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[wasm] Intrinsics for blazor #102670

Merged
merged 6 commits into from
Jun 19, 2024
Merged

[wasm] Intrinsics for blazor #102670

merged 6 commits into from
Jun 19, 2024

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kg
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@kg kg commented May 24, 2024

During blazor startup these 3 methods account for a bit over 100 compiled methods if I analyzed the trace correctly. Since interp codegen dominates blazor startup (50-75% depending on how you measure it) my hope is that pruning methods out will reduce overall startup time. These three seemed like easy targets.

Add is commented out because I can't get it to work. Will be relying on help for that one unless a flash of insight helps me figure out how to fix it.

Should I add a CEQ0_I8 for IsNullRef? I'm not sure it's worth adding a new opcode just for that.

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kg commented May 28, 2024

Add intrinsic fixed, thanks @lambdageek for spotting the bug

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BrzVlad commented May 28, 2024

Does this have any measurable impact ?

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kg commented May 28, 2024

Does this have any measurable impact ?

We generate ~100 fewer methods during blazor startup. My timing data is very noisy, so I can't say 'this makes startup 1ms faster' with any confidence.

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kg commented Jun 6, 2024

The interp PGO tests were relying on us tiering one of these methods, oops :-)

@kg kg force-pushed the interp-blazor-intrinsics-1 branch from d80dc29 to d970374 Compare June 6, 2024 22:30
@kg kg requested review from maraf and ilonatommy as code owners June 6, 2024 22:30
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kg commented Jun 7, 2024

The osx interp failures look real, but I can't make sense of them. Does anyone have any ideas for why it would only be failing there?

i.e. https://helixre107v0xdeko0k025g8.blob.core.windows.net/dotnet-runtime-refs-pull-102670-merge-a8c9cc274f16491385/Directed_3/1/console.34f65d92.log?helixlogtype=result

@kg kg force-pushed the interp-blazor-intrinsics-1 branch from c37ad60 to 71cf842 Compare June 10, 2024 22:10
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kg commented Jun 11, 2024

I can't reproduce the interp failures in either debug or release configurations. I'm doing:

clear; MONO_ENV_OPTIONS=--interpreter ~/Projects/dotnet-runtime-wasm/dotnet.sh build /bl /t:Test /p:RuntimeFlavor=mono /p:RuntimeVariant=monointerpreter /p:Configuration=Debug /p:EnableAggressiveTrimming=true /p:RunAOTCompilation=false /p:MonoEnvOptions="--interpreter" ~/Projects/dotnet-runtime-wasm/src/libraries/Common/tests/Common.Tests.csproj

but that failing suite along with other suites like S.R.T passes.

Don't allocate unnecessary temp var. Don't generate mul if type size is 1.
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4 participants