GSoC: possible IPA-ICF project direction
Project / Subsystem
gcc / gsoc
Date
2026-09-14
Proposer
Rohith Kapelli <kapellirohith@gmail.com>
Source type
public_inbox
Consensus
Proposed
Sentiment
—/10
Technical tradeoffs
- • Aggressively merging functions can improve code size and cache performance but risks correctness if equivalence checks are insufficient.
- • Making ICF more conservative (merging fewer functions) improves safety but reduces potential optimization benefits.
- • Developing new equivalence checks requires careful analysis to cover all relevant properties without excessive overhead.
All attributes
- project
- gcc
- subsystem
- gsoc
- patch_id
- —
- discussion_id
- 20260914065308.48385-1-kapellirohith@gmail.com
- source_type
- public_inbox
- title
- GSoC: possible IPA-ICF project direction
- headline
- GSoC: possible IPA-ICF project direction
- tldr
- Proposal for a GSoC project to inventory and improve ICF's equivalence checks for function merging, especially for template instantiations.
- proposer
- Rohith Kapelli <kapellirohith@gmail.com>
- consensus
- Proposed
- outcome
- proposed
- sentiment_score
- —
- technical_tradeoffs
-
- • Aggressively merging functions can improve code size and cache performance but risks correctness if equivalence checks are insufficient.
- • Making ICF more conservative (merging fewer functions) improves safety but reduces potential optimization benefits.
- • Developing new equivalence checks requires careful analysis to cover all relevant properties without excessive overhead.
- series_id
- —
- series_role
- standalone
- series_parts
- []
- tags
-
- • GCC
- • optimization
- • IPA
- • ICF
- • GSoC
- bugzilla_url
- —
- date
- 2026-09-14T00:00:00.000Z
GSoC: possible IPA-ICF project direction
Rohith Kapelli, a GCC contributor with several merged patches, proposes a Google Summer of Code project focused on improving GCC’s Interprocedural Function Cloning (IPA-ICF) pass. The project aims to identify and address limitations in ICF’s current equivalence checks, which sometimes miss information or incorrectly merge functions, impacting optimization. The goal is to enhance ICF’s ability to safely merge functions, particularly template instantiations, leading to better code size and performance.