public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "chfast at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/114452] New: Functions invoked through compile-time table of function pointers not inlined Date: Mon, 25 Mar 2024 10:09:56 +0000 [thread overview] Message-ID: <bug-114452-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114452 Bug ID: 114452 Summary: Functions invoked through compile-time table of function pointers not inlined Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: rtl-optimization Assignee: unassigned at gcc dot gnu.org Reporter: chfast at gmail dot com Target Milestone: --- In the following example there is a compile-time table of pointers to simple functions. When the table is used in a simple unrolled loop with constant trip count the functions invoked by pointers are not inlined. using F = int (*)(int) noexcept; void test(int z[2]) noexcept { static constexpr F fs[]{ [](int x) noexcept { return x; }, [](int x) noexcept { return x; }, }; for (int i = 0; i < 2; ++i) { z[i] = fs[i](z[i]); } } Generated assembly: test(int*)::{lambda(int)#1}::_FUN(int): mov eax, edi ret test(int*)::{lambda(int)#2}::_FUN(int): mov eax, edi ret test(int*): mov rdx, rdi mov edi, DWORD PTR [rdi] call test(int*)::{lambda(int)#1}::_FUN(int) mov edi, DWORD PTR [rdx+4] mov DWORD PTR [rdx], eax call test(int*)::{lambda(int)#2}::_FUN(int) mov DWORD PTR [rdx+4], eax ret https://godbolt.org/z/fGqPKh81j
next reply other threads:[~2024-03-25 10:09 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-25 10:09 chfast at gmail dot com [this message] 2024-03-25 10:35 ` [Bug rtl-optimization/114452] " xry111 at gcc dot gnu.org 2024-03-25 10:40 ` chfast at gmail dot com 2024-03-25 10:41 ` xry111 at gcc dot gnu.org 2024-03-27 17:01 ` jamborm at gcc dot gnu.org 2024-03-27 17:03 ` xry111 at gcc dot gnu.org 2024-04-11 8:07 ` chfast at gmail dot com 2024-04-11 9:33 ` jamborm at gcc dot gnu.org 2024-04-11 9:41 ` chfast at gmail dot com
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-114452-4@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).