https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123317
Jeffrey A. Law <law at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks|120763 |
CC| |pan2.li at intel dot com
--- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Bisected to:
commit 6c8bcbc10d6cec60ed616cfffd08d2357baa4735
Author: Pan Li <[email protected]>
Date: Wed Oct 8 22:12:38 2025 +0800
RISC-V: Combine vec_duplicate + vwsubu.wv to vwsubu.wx on GR2VR cost
This patch would like to combine the vec_duplicate + vwsubu.wv to the
vwsubu.wx. From example as below code. The related pattern will depend
on the cost of vec_duplicate from GR2VR. Then the late-combine will
take action if the cost of GR2VR is zero, and reject the combination
if the GR2VR cost is greater than zero.
[ ... ]
The only difference with that change in in func5(). I haven't debugged further
than that.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120763
[Bug 120763] [meta-bug] Tracker for bugs to visit during weekly RISC-V meeting
