https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113495
Bug ID: 113495
Summary: RISC-V: Time and memory awful consumption of SPEC2017
wrf benchmark
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: juzhe.zhong at rivai dot ai
Target Milestone: ---
riscv64-unknown-linux-gnu-gfortran -march=rv64gcv_zvl256b -O3 -S -ftime-report
real 63m18.771s
user 60m19.036s
sys 2m59.787s
60+ minutes.
After investigation, the time report show 2 PASS are critical:
loop invariant motion :2600.28 ( 72%) 1.68 ( 1%)2602.12 ( 69%)
2617k ( 0%)
loop invariant consume most of the time 72% time.
The other is the VSETVL PASS:
vsetvl: earliest_fuse_vsetvl_info : 438.26 ( 12%) 79.82 ( 47%) 518.08 (
14%)221807M ( 75%)
vsetvl: pre_global_vsetvl_info : 135.98 ( 4%) 31.71 ( 19%) 167.69 ( 4%)
71950M ( 24%)
The phase 2 and phase 3 of VSETVL PASS consume 16% times and 99% memory.
I will look into VSETVL PASS issue but I am not able to take care of loop
invariant issue.
