public inbox for gcc-prs@sourceware.org help / color / mirror / Atom feed
From: dmeggy@techsol.ca To: gcc-gnats@gcc.gnu.org Subject: target/9766: thumb mode produces an arm instruction with -Os Date: Wed, 19 Feb 2003 23:26:00 -0000 [thread overview] Message-ID: <20030219232559.24045.qmail@sources.redhat.com> (raw) >Number: 9766 >Category: target >Synopsis: thumb mode produces an arm instruction with -Os >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: wrong-code >Submitter-Id: net >Arrival-Date: Wed Feb 19 23:26:00 UTC 2003 >Closed-Date: >Last-Modified: >Originator: dmeggy@techsol.ca >Release: unknown-1.0 >Organization: >Environment: arm-linux >Description: try compiling the following function with the following options to gcc 3.2.2 "-Os -mthumb -c -o dave.o dave.c" static int dave(const char *s) { unsigned long matchmap[8]; return (int)matchmap[(unsigned char)*s++/32]; } it produces a load register function that uses the stack pointer (i.e. a register above r7, which is invalid in thumb mode) >How-To-Repeat: try compiling the above function >Fix: Take off -Os optimization >Release-Note: >Audit-Trail: >Unformatted:
reply other threads:[~2003-02-19 23:26 UTC|newest] Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20030219232559.24045.qmail@sources.redhat.com \ --to=dmeggy@techsol.ca \ --cc=gcc-gnats@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).