Landing: 20c529f47542
Project / Subsystem
gcc / gcc/hard-reg-set
Date
2026-06-05
Author
Xi Ruoyao
Commit
20c529f47542e94e921556684f8ce27495135926
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- gcc/hard-reg-set
- patch_id
- —
- commit_hash
- 20c529f47542e94e921556684f8ce27495135926
- source_type
- github
- headline
- Hard-reg-set: Make temporary SET for EXECUTE_IF_SET_IN_HARD_REG_SET a build-time error
- tldr
- GCC now prevents the use of temporary `SET` objects with `EXECUTE_IF_SET_IN_HARD_REG_SET` at build time, avoiding future errors.
- author
- Xi Ruoyao
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • rtl-optimization
- • compiler-internals
- • build-time-check
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-05T00:00:00.000Z
This change enhances the GCC compiler’s internal consistency by making it a build-time error to use temporary SET objects with the EXECUTE_IF_SET_IN_HARD_REG_SET macro. Previously, this could lead to subtle issues that were difficult to diagnose. By introducing a new build_error_on_rvalue function and calling it from the macro, future incorrect usage is proactively caught during GCC’s own compilation.