public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/97236] [10/11 Regression] g:e93428a8b056aed83a7678 triggers vlc miscompile Date: Tue, 29 Sep 2020 13:46:26 +0000 [thread overview] Message-ID: <bug-97236-4-SR9GLcC19P@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-97236-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97236 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P2 Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- typedef unsigned char __uint8_t; typedef __uint8_t uint8_t; typedef struct plane_t { uint8_t *p_pixels; int i_lines; int i_pitch; } plane_t; typedef struct { plane_t p[5]; } picture_t; #define N 4 void __attribute__((noipa)) picture_Clone(picture_t *picture, picture_t *res) { for (int i = 0; i < N; i++) { res->p[i].p_pixels = picture->p[i].p_pixels; res->p[i].i_lines = picture->p[i].i_lines; res->p[i].i_pitch = picture->p[i].i_pitch; } } int main() { picture_t aaa, bbb; uint8_t pixels[10] = {1, 1, 1, 1, 1, 1, 1, 1}; for (unsigned i = 0; i < N; i++) aaa.p[i].p_pixels = pixels; picture_Clone (&aaa, &bbb); uint8_t c; for (unsigned i = 0; i < N; i++) c += bbb.p[i].p_pixels[0]; if (c != N) __builtin_abort (); return 0; } ends up with a NULL pointer in bb.p[1].p_pixels
next prev parent reply other threads:[~2020-09-29 13:46 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-29 7:12 [Bug tree-optimization/97236] New: " rguenth at gcc dot gnu.org 2020-09-29 7:13 ` [Bug tree-optimization/97236] " rguenth at gcc dot gnu.org 2020-09-29 13:05 ` marxin at gcc dot gnu.org 2020-09-29 13:05 ` marxin at gcc dot gnu.org 2020-09-29 13:06 ` marxin at gcc dot gnu.org 2020-09-29 13:46 ` rguenth at gcc dot gnu.org [this message] 2020-09-29 14:14 ` rguenth at gcc dot gnu.org 2020-09-30 9:20 ` rguenth at gcc dot gnu.org 2020-10-01 13:58 ` cvs-commit at gcc dot gnu.org 2020-10-01 13:59 ` [Bug tree-optimization/97236] [10 " rguenth at gcc dot gnu.org 2020-10-06 11:42 ` cvs-commit at gcc dot gnu.org 2020-10-06 12:20 ` rguenth at gcc dot gnu.org 2021-02-03 8:25 ` rguenth at gcc dot gnu.org 2021-02-03 8:26 ` [Bug tree-optimization/97236] [8/9 " rguenth at gcc dot gnu.org 2021-02-05 15:43 ` cvs-commit at gcc dot gnu.org 2021-02-05 15:44 ` ktkachov at gcc dot gnu.org 2021-02-05 15:45 ` [Bug tree-optimization/97236] [8 " ktkachov at gcc dot gnu.org 2021-02-08 10:33 ` cvs-commit at gcc dot gnu.org 2021-02-08 10:43 ` rguenth at gcc dot gnu.org 2021-03-04 8:06 ` marxin at gcc dot gnu.org 2021-04-19 6:31 ` rguenth at gcc dot gnu.org
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-97236-4-SR9GLcC19P@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).