dotnet/runtime

Perform simple SIMD transformations where applicable

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#82,366 opened on Feb 19, 2023

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area-CodeGen-coreclrhelp wanted

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Description

As part of the more general support for basic constant folding around SIMD types, we should ensure that transforms which exist for scalar code are mirrored for the SIMD scenario as well.

Consider for example vector * 2 which can be translated to vector + vector instead.

Contributor guide

Research direction
Investigate the existing constant folding transforms for scalar types in the .NET JIT compiler. Identify the SIMD representation and implement analogous transforms such as converting `vector * 2` to `vector + vector`. Trace the handling of SIMD operations in the codebase.
Tech stack
csharp
Domain
backendperformance
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#SIMD
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30