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From: "pheeck at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/112548] [14 regression] 5% exec time regression in
 429.mcf on AMD zen4 CPU (since r14-5076-g01c18f58d37865)
Date: Thu, 14 Mar 2024 16:41:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112548

--- Comment #19 from Filip Kastl <pheeck at gcc dot gnu.org> ---
There's indeed another difference. In my case, gcc gets called with -std=3D=
gnu99.
Otherwise, I think the options are the same.

gcc -std=3Dgnu99 -c -o pbeampp.o -DSPEC_CPU -DNDEBUG  -DWANT_STDC_PROTO=20
-fprofile-use    -Ofast -g -march=3Dnative -mtune=3Dnative  -flto=3D32=20=
=20=20=20=20=20=20
-DSPEC_CPU_LP64         pbeampp.c

If adding -std=3Dgnu99 doesn't help, I can try to generate the gcda with zn=
ver4
instead of native as you suggested.=