JuliaLang/julia

Code warntype should show print the unstable SSA values in red/yellow

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#54,028 opened on Apr 10, 2024

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 (9 comments) (0 reactions) (0 assignees)Julia (48,709 stars) (5,773 forks)batch import
display and printinggood first issue

Description

If you have some code like

julia> function foo(x)
       y = x[1]
       sin(y)
       end
foo (generic function with 1 method)

julia> code_warntype(foo, (Vector{Any},), optimize=true)

It would be useful if %17 was printed in red

Contributor guide

Tech stack
None
Domain
developer experiencetooling
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.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Familiarity with Julia's compilerUnderstanding of SSA form
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Examine the implementation of `code warntype` in Julia's base/compiler directory. Look for how SSA values are printed (likely in a function like `show stmt` or `print warntype`). Identify where color codes can be added based on type stability. Check comments in issue #54028 for any specific suggestions. Test by modifying the Julia source and rebuilding.