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Date: Mon, 02 Jun 2003 20:52:00 -0000
From: "skidder@bssys.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20030602205232.11068.skidder@bssys.com>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug optimization/11068] New: GCC 3.2.X miscompiles Firebird 1.5 with -O1
X-Bugzilla-Reason: CC
X-SW-Source: 2003-06/txt/msg00399.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11068

           Summary: GCC 3.2.X miscompiles Firebird 1.5 with -O1
           Product: gcc
           Version: 3.2.2
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P4
         Component: optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: skidder@bssys.com
                CC: gcc-bugs@gcc.gnu.org
 GCC build triplet: i586-pc-linux-gnu
  GCC host triplet: i586-pc-linux-gnu
GCC target triplet: i586-pc-linux-gnu

Problem is reproducable using GCC 3.2.1 or 3.2.3 on 
Mandrake 8.0 with GLIBC 2.3.1

Here is the testcase:
=== test.cpp =====================
#include <stdio.h>

#define USHORT unsigned short
#define UCHAR unsigned char

USHORT get_numeric() {
        return 42388;
}

int main ()
{
USHORT          length, l;
UCHAR           *buffer, static_buffer [1024];

length = (USHORT)get_numeric();

/* Allocate blob buffer is static buffer is too short */

if (!length || length + 1 <= (USHORT)(sizeof (static_buffer)) ) {
    buffer = static_buffer;
        printf("Shit happened !");
}
else
    {
        printf("Works fine");
    l = length + 1;
//    buffer = BURP_ALLOC (l);
        return 1;
    }

}
========================
g++ test.cpp
./a.out
Works fine
========================
g++ -O1 test.cpp
./a.out
Shit happened !
========================



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