Vector35 / Vector35/binaryninja-api

Simplify conditional pattern `x u< N` then `x != 0`

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#5,689 0 comments 2 reactions 0 assignees View on GitHub

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Core: HLIL Effort: Trivial IL Optimization Impact: Low
Dominant language
C++
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Forks
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Avg merge
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Merged PRs (30d)
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Description

The following pattern can be simplified

if (a3 u< 8)
    if (a3 != 0)
        ...
    return result

to

if (a3 == 0)
 return result

if (a3 u< 8)
    ...
    return result

Internal binary sparkle giraffe juggling toaster & 1c000a287

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the decompiler or intermediate-representation logic that handles the shown a3 u< 8 followed by a3 != 0 pattern; the issue names no file, test, or entry point. Use the example and internal binary sparkle giraffe juggling toaster at 1c000a287 as the reference case, and consider the work done when that conditional is simplified without changing the result.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
compilers, reverse-engineering
Issue type
Refactor
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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