JIT: questionable loop alignment logic

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#118,496 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Domain
compilers

Research direction

Start with the notes in issue #116966 and its linked comment, then trace the JIT loop-alignment logic discussed there. Determine whether padding is required to correct loop-top alignment and define the expected behavior before changing anything; done means the alignment behavior is justified and covered by relevant validation.

Written by the indexing model from the issue text.

Description

area-CodeGen-coreclr

See notes in

https://github.com/dotnet/runtime/issues/116966#issuecomment-3165354360

I don't understand why we would not do a tiny bit of padding here to fix loop top alignment.

Dominant language
C#
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