Landing: a462ae8896ca
Project / Subsystem
gcc / gcc/ada
Date
2026-05-07
Author
Eric Botcazou
Commit
a462ae8896caa378eb23ef67e7b6b87ed6c1bae1
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/ada
- patch_id
- —
- commit_hash
- a462ae8896caa378eb23ef67e7b6b87ed6c1bae1
- source_type
- github
- headline
- Optimizes memory layout for Ada tagged type data
- tldr
- This commit improves the memory layout of type-specific data records for Ada tagged types, reducing memory consumption on 64-bit targets.
- author
- Eric Botcazou
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • optimization
- • memory
- • ada
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-05-07T00:00:00.000Z
The compiler now optimizes the layout of Type_Specific_Data records used with Ada tagged types. By reordering boolean components to immediately follow natural components, the compiler saves one 64-bit word for each record on 64-bit architectures. This change directly translates to reduced memory usage for applications heavily utilizing tagged types, improving overall footprint efficiency.