Landing: 0c4d0fe4c998
Project / Subsystem
gcc / xtensa
Date
2026-09-12
Author
Takayuki 'January June' Suwa
Commit
0c4d0fe4c998ea42cfc241c81678d59b708b1043
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- xtensa
- patch_id
- —
- commit_hash
- 0c4d0fe4c998ea42cfc241c81678d59b708b1043
- source_type
- github
- headline
- xtensa: Revert 'return' insn pattern changes
- tldr
- Reverts a change to how the 'return' instruction pattern is handled on Xtensa, restoring correct register allocation.
- author
- Takayuki 'January June' Suwa
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • xtensa
- • revert
- • register allocation
- • ABI
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-09-12T00:00:00.000Z
This commit reverts a change that incorrectly handled register allocation for the ‘return’ instruction pattern on Xtensa processors using the CALL0 ABI. Previously, specifying hard registers used by the return pattern via EPILOGUE_USES() interfered with DF information and register allocation. This reversion restores the previous behavior of directly using a USE RTX for the return address register, allowing it to be repurposed when needed.