<scp>WizardMerge</scp> —Save Us from Merging without Any Clues

Modern software development necessitates efficient version-oriented collaboration among developers. While Git is the most popular version control system, it generates unsatisfactory version merging results due to textual-based workflow, leading to potentially unexpected results in the merged version of the project. Although numerous merging tools have been proposed for improving merge results, developers remain struggling to resolve the conflicts and fix incorrectly modified code without clues. We present WizardMerge , an auxiliary tool that leverages merging results from Git to retrieve code block dependency on text and LLVM Intermediate Representation level and provide suggestions for developers to resolve errors introduced by textual merging. Rather than directly resolving these errors, the suggestions provide pigeonholed code blocks with their relevance and prioritized order within each category. To this end, developers can address the specific locations of these issues without manually analyzing their dependencies, thereby reducing the time and effort spent on conflict resolution tasks. Through the evaluation, we subjected WizardMerge to testing on 227 conflicts within five large-scale projects. The outcomes demonstrate that WizardMerge diminishes conflict merging time costs, achieving a 23.85% reduction. Beyond addressing conflicts, WizardMerge provides useful code block classifications and resolving orders for over 70% of the code blocks potentially affected by the conflicts. Notably, WizardMerge exhibits the capability to identify conflict-unrelated code blocks that require manual intervention yet are harmfully applied by Git during the merging.