public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "ishiura-compiler at ml dot kwansei.ac.jp" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/63381] New: Wrong constant folding Date: Fri, 26 Sep 2014 09:47:00 -0000 [thread overview] Message-ID: <bug-63381-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381 Bug ID: 63381 Summary: Wrong constant folding Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: ishiura-compiler at ml dot kwansei.ac.jp GCC 5.0.0 for x86_64 miscompiles the following code. $ cat test.c int a = 0, b = 0, c = 0, d, e; int main (void) { d = ((20 % (1 != b)) && c) + 2147483647; e = 20 % (a >= 0); return 0; } $ x86_64-unknown-linux-gnu-gcc-5.0.0 test.c -Os $ ./a.out Floating point exception (core dumped) $ x86_64-unknown-linux-gnu-gcc-5.0.0 -v Using built-in specs. COLLECT_GCC=x86_64-unknown-linux-gnu-gcc-5.0.0 COLLECT_LTO_WRAPPER=/usr/local/x86_64-tools/gcc- 5.0.0/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: /home/orange3/gcc-master/configure -- prefix=/usr/local/x86_64-tools/gcc-5.0.0/ --with-gmp=/usr/local/gmp- 5.1.1/ --with-mpfr=/usr/local/mpfr-3.1.2/ --with-mpc=/usr/local/mpc- 1.0.1/ --disable-multilib --disable-nls --enable-languages=c Thread model: posix gcc version 5.0.0 20140922 (experimental) (GCC)
next reply other threads:[~2014-09-26 9:47 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-09-26 9:47 ishiura-compiler at ml dot kwansei.ac.jp [this message] 2014-10-02 14:56 ` [Bug tree-optimization/63381] " mpolacek at gcc dot gnu.org 2014-10-02 15:00 ` [Bug tree-optimization/63381] [5 Regression] " mpolacek at gcc dot gnu.org 2014-10-02 15:07 ` mpolacek at gcc dot gnu.org 2014-10-06 12:05 ` rguenth at gcc dot gnu.org 2014-10-09 8:18 ` 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-63381-4@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).