https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118351
Bug ID: 118351
Summary: [15 Regression] 6% regression in 470.lbm_r in SPECCPU
2006 on AArch64
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tnfchris at gcc dot gnu.org
CC: wilco at gcc dot gnu.org
Target Milestone: ---
Target: aarch64*
There is a 6% regression on lbm in SPECCPU2006 on Neoverse-V1 after this
change:
commit c5db3f50bdf34ea96fd193a2a66d686401053bd2
Author: Wilco Dijkstra <[email protected]>
Date: Fri Nov 1 14:40:26 2024 +0000
AArch64: Switch off early scheduling
The hot loop seems to now spill simple constants instead of rematerializing
them through an fmov.
The same regression also shows up in lbm in SPECCPU 2017 but only with PGO.
