Landing: a5e5c22ad486
Project / Subsystem
gcc / c++
Date
2026-07-31
Author
Jakub Jelinek
Commit
a5e5c22ad4862846ea705d43c640ca18cc9dd78a
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- c++
- patch_id
- —
- commit_hash
- a5e5c22ad4862846ea705d43c640ca18cc9dd78a
- source_type
- github
- headline
- C++: Avoid caching calls that rethrow or query exception state
- tldr
- Compiler now avoids caching function calls during constant evaluation if they involve exceptions.
- author
- Jakub Jelinek
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • c++
- • constexpr
- • exception handling
- • optimization
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-31T00:00:00.000Z
This commit prevents the C++ compiler from caching function calls during constant evaluation if those calls involve exception handling mechanisms like rethrow, __builtin_uncaught_exceptions, or __builtin_current_exception. Caching such calls could lead to incorrect results if the execution context’s exception state changes. By marking these operations as non-cacheable, the compiler ensures more reliable constant evaluation in the presence of exceptions.