Date: Fri, 3 Jan 2014 01:41:51 GMT From: Stephen Hurd <shurd@sasktel.net> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/185431: gcc bug with short int promotion Message-ID: <201401030141.s031fp59044345@oldred.freebsd.org> Resent-Message-ID: <201401030150.s031o0XH044048@freefall.freebsd.org>
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>Number: 185431
>Category: bin
>Synopsis: gcc bug with short int promotion
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jan 03 01:50:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator: Stephen Hurd
>Release: 9.1-RELEASE-p6
>Organization:
>Environment:
FreeBSD cracked.hurd.local 9.1-RELEASE-p6 FreeBSD 9.1-RELEASE-p6 #0: Wed Aug 21 20:30:17 UTC 2013 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
>Description:
Integer promotion of a short int and an unsigned short in the same expression seems broken in the system compiler.
>How-To-Repeat:
#include <stdio.h>
int main(int argc, char **argv)
{
short k = 251;
unsigned short l = 65535;
printf("%hd > %hu = %d\n", k, l, (k > l));
return 0;
}
> gcc test.c
> ./a.out
251 > 65535 = 1
>Fix:
Use a different compiler.
>Release-Note:
>Audit-Trail:
>Unformatted:
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