public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "ian at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug go/61308] gccgo: ICE in Expression::check_bounds [GoSmith] Date: Tue, 05 Aug 2014 02:58:00 -0000 [thread overview] Message-ID: <bug-61308-4-ldeiL9pI8N@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-61308-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61308 --- Comment #4 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> --- Author: ian Date: Tue Aug 5 02:58:15 2014 New Revision: 213616 URL: https://gcc.gnu.org/viewcvs?rev=213616&root=gcc&view=rev Log: PR go/61308 PR go/61866 compiler: Don't cast index expr to int before bounds check. This fixes http://gcc.gnu.org/PR61866 : on a 32-bit system, casting an int64 index to int drops the upper 32 bits of the value, and thus can cause an out-of-range index to appear to be in range. This undoes part of change 1318:fa6e0c716dba (https://codereview.appspot.com/104610044) and therefore breaks http://gcc.gnu.org/PR61308 again. I have a separate patch for that (http://codereview.appspot.com/122020043). In addition to undoing part of that change, this patch adds code to avoid a compiler crash. This changes PR61308 from a compiler crash to an incorrect error message. Modified: trunk/gcc/go/gofrontend/expressions.cc
next prev parent reply other threads:[~2014-08-05 2:58 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-05-25 7:21 [Bug go/61308] New: " dvyukov at google dot com 2014-07-08 21:29 ` [Bug go/61308] " ian at gcc dot gnu.org 2014-07-08 21:39 ` dvyukov at google dot com 2014-08-05 2:51 ` ian at airs dot com 2014-08-05 2:58 ` ian at gcc dot gnu.org [this message] 2014-08-05 3:11 ` ian at gcc dot gnu.org 2014-08-05 3:11 ` ian at gcc dot gnu.org 2014-08-05 3:21 ` ian at airs 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-61308-4-ldeiL9pI8N@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).