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Don't log warnings for certain RemoveAttributeInstances #91782

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merged 1 commit into from
Sep 11, 2023

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MichalStrehovsky
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Fixes #88994.

ILLinker attribute XML format has a way to express "only remove these attributes when parameter X has value of Y". We currently generate a warning and don't trim the attribute at all.

The savings from trimming these attributes are going to be miniscule. Even in IL, this is scraping the bottom of the barrel. In Native AOT these attributes are pretty effectively deduplicated across assemblies. We'll likely never need this.

This keeps the existing behavior (don't trim the attribute), but removes the warning.

Cc @dotnet/ilc-contrib

Fixes #88994.

ILLinker attribute XML format has a way to express "only remove these attributes when parameter X has value of Y". We currently generate a warning and don't trim the attribute at all.

The savings from trimming these attributes are going to be miniscule. Even in IL, this is scraping the bottom of the barrel. In Native AOT these attributes are pretty effectively deduplicated across assemblies. We'll likely never need this.

This keeps the existing behavior (don't trim the attribute), but removes the warning.
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ghost commented Sep 8, 2023

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Issue Details

Fixes #88994.

ILLinker attribute XML format has a way to express "only remove these attributes when parameter X has value of Y". We currently generate a warning and don't trim the attribute at all.

The savings from trimming these attributes are going to be miniscule. Even in IL, this is scraping the bottom of the barrel. In Native AOT these attributes are pretty effectively deduplicated across assemblies. We'll likely never need this.

This keeps the existing behavior (don't trim the attribute), but removes the warning.

Cc @dotnet/ilc-contrib

Author: MichalStrehovsky
Assignees: -
Labels:

area-NativeAOT-coreclr

Milestone: -

@ivanpovazan
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/cc: @rolfbjarne

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@vitek-karas vitek-karas left a comment

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We're likely missing a test here - this should have been caught by a test.

I agree that if NativeAOT doesn't support that feature, it should not warn because of it being used.

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We're likely missing a test here - this should have been caught by a test.

We have validation for the things that work (unconditional removal) in Native AOT smoke test suite. We just don't run the shared ILLinker tests for these. We probably don't have any sort of Kept validation for attributes. One could extract that information from the dependency graph in theory.

@MichalStrehovsky MichalStrehovsky merged commit a603693 into main Sep 11, 2023
103 of 108 checks passed
@MichalStrehovsky MichalStrehovsky deleted the MichalStrehovsky-patch-3 branch September 11, 2023 07:56
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/backport to release-8.0

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Started backporting to release-8.0: https://github.com/dotnet/runtime/actions/runs/6143538866

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@MichalStrehovsky an error occurred while backporting to release-8.0, please check the run log for details!

Error: The specified backport target branch release-8.0 wasn't found in the repo.

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/backport to release/8.0

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Started backporting to release/8.0: https://github.com/dotnet/runtime/actions/runs/6143568355

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Multiple IL2049 warnings when publishing with NativeAOT and _AggressiveAttributeTrimming
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