[Bug target/110784] bpf: make use of the V4 sign-extended move instructions

[jemarch at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110784

Jose E. Marchesi  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |FIXED

--- Comment #2 from Jose E. Marchesi  ---
Fixed by the commit above.

[Bug target/110784] bpf: make use of the V4 sign-extended move instructions

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110784

--- Comment #1 from CVS Commits  ---
The master branch has been updated by David Faust :

https://gcc.gnu.org/g:14dab1a1bcc3f0315e33d166df06520fba409c9b

commit r14-2831-g14dab1a1bcc3f0315e33d166df06520fba409c9b
Author: David Faust 
Date:   Thu Jul 27 13:55:44 2023 -0700

bpf: ISA V4 sign-extending move and load insns [PR110782,PR110784]

BPF ISA V4 introduces sign-extending move and load operations.  This
patch makes the BPF backend generate those instructions, when enabled
and useful.

A new option, -m[no-]smov gates generation of these instructions, and is
enabled by default for -mcpu=v4 and above.  Tests for the new
instructions and documentation for the new options are included.

PR target/110782
PR target/110784

gcc/

* config/bpf/bpf.opt (msmov): New option.
* config/bpf/bpf.cc (bpf_option_override): Handle it here.
* config/bpf/bpf.md (*extendsidi2): New.
(extendhidi2): New.
(extendqidi2): New.
(extendsisi2): New.
(extendhisi2): New.
(extendqisi2): New.
* doc/invoke.texi (Option Summary): Add -msmov eBPF option.
(eBPF Options): Add -m[no-]smov.  Document that -mcpu=v4
also enables -msmov.

gcc/testsuite/

* gcc.target/bpf/sload-1.c: New test.
* gcc.target/bpf/sload-pseudoc-1.c: New test.
* gcc.target/bpf/smov-1.c: New test.
* gcc.target/bpf/smov-pseudoc-1.c: New test.