Landing: f2d10af76ed7
Project / Subsystem
gcc / aarch64
Date
2026-03-18
Author
Pengxuan Zheng
Commit
f2d10af76ed7735556d8f3dedce7090f663cd715
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- aarch64
- patch_id
- —
- commit_hash
- f2d10af76ed7735556d8f3dedce7090f663cd715
- source_type
- github
- headline
- AArch64 gains support for vectorizing long-to-float conversions.
- tldr
- The compiler can now vectorize conversions from long to float on AArch64, improving performance when converting arrays of integers to floating-point values.
- author
- Pengxuan Zheng
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • aarch64
- • vectorization
- • SIMD
- • optimization
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-03-18T00:00:00.000Z
This commit adds a new pattern, vec_packs_float_v2di, to the AArch64 backend, enabling the vectorizer to convert arrays of long integers to floating-point numbers using SIMD instructions. This can significantly improve the performance of code that performs many such conversions, as it allows the compiler to process multiple elements in parallel. A new test case gcc.target/aarch64/pr123748.c validates the new pattern.