tree-ssa-structalias.cc: Why do we iterate over fields of a global varinfo
Project / Subsystem
gcc / tree-ssa-structalias.cc
Date
2026-09-01
Proposer
Filip Kastl <fkastl@suse.cz>
Source type
public_inbox
Consensus
Proposed
Sentiment
7/10
Technical tradeoffs
- • Potential redundancy in analysis loops.
- • Correctness of handling global aggregate field information.
All attributes
- project
- gcc
- subsystem
- tree-ssa-structalias.cc
- patch_id
- —
- discussion_id
- apaWVIe17Ac-Fk7c@localhost.localdomain
- source_type
- public_inbox
- title
- tree-ssa-structalias.cc: Why do we iterate over fields of a global varinfo
- headline
- tree-ssa-structalias.cc: Why do we iterate over fields of a global varinfo
- tldr
- Investigating IPA PTA code regarding shadow vars and global aggregate fields.
- proposer
- Filip Kastl <fkastl@suse.cz>
- consensus
- Proposed
- outcome
- proposed
- sentiment_score
- 7
- technical_tradeoffs
-
- • Potential redundancy in analysis loops.
- • Correctness of handling global aggregate field information.
- series_id
- —
- series_role
- standalone
- series_parts
- []
- tags
-
- • gcc
- • compiler
- • analysis
- • ipa
- • pta
- bugzilla_url
- —
- date
- 2026-09-01T00:00:00.000Z
tree-ssa-structalias.cc: Why do we iterate over fields of a global varinfo
Filip Kastl questions why IPA PTA code in tree-ssa-structalias.cc iterates over fields of a global aggregate variable. He wonders if varinfos representing fields of global aggregates are not marked as global, making the second loop redundant. A subsequent comment from Filip suggests he found an explanation in gimple-ssa-pta-constraints.cc, indicating that subfields for globals are not used in IPA mode.