dotnet/roslyn

Branchless codegen for lifted nullable operators | and &

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#26,009 opened on Apr 6, 2018

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 (2 comments) (0 reactions) (0 assignees)C# (4,257 forks)batch import
Area-CompilersCode Gen Qualityhelp wanted

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Description

It would be nice to have improved code gen for & and | analogous to the changes in https://github.com/dotnet/roslyn/pull/25992.

For VB too.

Contributor guide

Research direction
Examine the codegen for `&` and `|` operators in nullable lifting, and apply a similar branchless optimization as done in PR #25992.
Tech stack
csharp
Domain
compilers
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
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.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C#Roslyn compiler internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25