https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110786
--- Comment #1 from CVS Commits ---
The master branch has been updated by Jose E. Marchesi :
https://gcc.gnu.org/g:f1e34551e4d6e259ab3bd0c9aba4fa1f0c448214
commit r14-2741-gf1e34551e4d6e259ab3bd0c9aba4fa1f0c448214
Author: Jose E. Marchesi
Date: Mon Jul 24 10:56:27 2023 +0200
bpf: make use of the bswap{16,32,64} V4 BPF instruction
This patch makes the BPF backend to use the new V4 bswap{16,32,64}
instructions in order to implement the __builtin_bswap{16,32,64}
built-ins. It also adds support for -mcpu=v4 and -m[no]bswap
command-line options. Tests and doc updates are includes.
Tested in bpf-unknown-none.
gcc/ChangeLog
PR target/110786
* config/bpf/bpf.opt (mcpu): Add ISA_V4 and make it the default.
(mbswap): New option.
* config/bpf/bpf-opts.h (enum bpf_isa_version): New value ISA_V4.
* config/bpf/bpf.cc (bpf_option_override): Set bpf_has_bswap.
* config/bpf/bpf.md: Use bswap instructions if available for
bswap* insn, and fix constraint.
* doc/invoke.texi (eBPF Options): Document -mcpu=v4 and -mbswap.
gcc/testsuite/ChangeLog
PR target/110786
* gcc.target/bpf/bswap-1.c: Pass -mcpu=v3 to build test.
* gcc.target/bpf/bswap-2.c: New test.
