public inbox for gcc-prs@sourceware.org help / color / mirror / Atom feed
From: jessica_han@hp.com To: gcc-gnats@gcc.gnu.org Subject: optimization/6686: IA64 GCC 3.1 Incorrect run time result at -O1 Date: Thu, 16 May 2002 16:36:00 -0000 [thread overview] Message-ID: <20020516232603.8796.qmail@sources.redhat.com> (raw) >Number: 6686 >Category: optimization >Synopsis: IA64 GCC 3.1 Incorrect run time result at -O1 >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Thu May 16 16:36:00 PDT 2002 >Closed-Date: >Last-Modified: >Originator: jessica_han@hp.com >Release: 3.1 >Organization: >Environment: IA64 Linux >Description: Incorrect behavior at -O1 Before change, j points to: 0x80000fffffffbac0 After change, j points to: 0x6000000000000d90 Address of i (which j is supposed to equal) is: 0x6000000000000d90 value of j is: 0x80000fffffffbac0, address of i is 0x6000000000000d90 *ox.oy.j=10, expect 5 >How-To-Repeat: g++ -O1 bug1.C ./a.out >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: text/plain; name="bug1.C" Content-Disposition: inline; filename="bug1.C" // failed in -O1 #include <stdio.h> static int i = 5; int main() { const class X { public: mutable int i; //mutable data-member class Y { public: mutable volatile int *j; //j is a pointer to mutable volatile int void Change_j() const { j = &::i; } }; Y oy; X() : i(10) { } }ox; ox.oy.j = (volatile int*)&ox.i; printf("Before change, j points to: %p\n",ox.oy.j); ox.oy.Change_j(); printf("After change, j points to: %p\n",ox.oy.j); printf("Address of i (which j is supposed to equal) is: %p\n",&i); printf("value of j is: %p, address of i is %p\n",ox.oy.j, &i); if(*ox.oy.j != 5) printf("*ox.oy.j=%d, expect 5 \n", *ox.oy.j); }
next reply other threads:[~2002-05-16 23:36 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-05-16 16:36 jessica_han [this message] 2003-05-03 0:23 falk.hueffner
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=20020516232603.8796.qmail@sources.redhat.com \ --to=jessica_han@hp.com \ --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).