https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28614
Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-10-04
CC| |ams at gcc dot gnu.org,
| |tschwinge at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #7 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
For what it's worth, some changes after 2024-09-20's commit
r15-3743-g2828ec526eaf5612178b62d48bfd8443c7ecd674 appear to have regressed
this for '--target=amdgcn-amdhsa' (tested '-march=gfx908', '-march=gfx1100';
with '--enable-checking=yes,extra,rtl') -- but for '-O1' only:
PASS: gcc.c-torture/compile/20001226-1.c -O0 (test for excess errors)
{+WARNING: gcc.c-torture/compile/20001226-1.c -O1 (test for excess
errors) program timed out.+}
[-PASS:-]{+FAIL:+} gcc.c-torture/compile/20001226-1.c -O1 (test for
excess errors)
PASS: gcc.c-torture/compile/20001226-1.c -O2 (test for excess errors)
PASS: gcc.c-torture/compile/20001226-1.c -O3 -g (test for excess errors)
PASS: gcc.c-torture/compile/20001226-1.c -Os (test for excess errors)
We've got, for example:
$ \time [...] -O0 [...]
10.69user 0.45system 0:11.14elapsed 99%CPU (0avgtext+0avgdata
361912maxresident)k
0inputs+18200outputs (0major+123361minor)pagefaults 0swaps
$ \time [...] -O1 [...]
[manually terminated after 19.75 h 100 % CPU usage]
xgcc: fatal error: Terminated signal terminated program cc1
compilation terminated.
Command exited with non-zero status 1
70873.77user 112.37system 19:43:29elapsed 99%CPU (0avgtext+0avgdata
1142652maxresident)k
0inputs+0outputs (0major+34722283minor)pagefaults 0swaps
$ \time [...] -O2 [...]
41.28user 0.28system 0:41.57elapsed 99%CPU (0avgtext+0avgdata
210248maxresident)k
0inputs+2864outputs (0major+83144minor)pagefaults 0swaps
I've not further analyzed where the time is being spent in 'cc1'.
At 2024-09-20's commit r15-3743-g2828ec526eaf5612178b62d48bfd8443c7ecd674 we
had, for example:
$ \time [...] -O0 [...]
10.75user 0.47system 0:11.23elapsed 99%CPU (0avgtext+0avgdata
362048maxresident)k
0inputs+18200outputs (0major+123444minor)pagefaults 0swaps
$ \time [...] -O1 [...]
10.27user 0.31system 0:10.58elapsed 99%CPU (0avgtext+0avgdata
194036maxresident)k
0inputs+3760outputs (0major+71795minor)pagefaults 0swaps
$ \time [...] -O2 [...]
31.45user 0.29system 0:31.75elapsed 99%CPU (0avgtext+0avgdata
224988maxresident)k
0inputs+2912outputs (0major+77431minor)pagefaults 0swaps
..., so 10 s for '-O1'.
