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Date: Wed, 29 Jun 2005 20:36:00 -0000
From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20050629203622.22236.pinskia@gcc.gnu.org>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug tree-optimization/22236] New: [4.1 Regression] wrong code for casts and scev
X-Bugzilla-Reason: CC
X-SW-Source: 2005-06/txt/msg03485.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

The following should not abort but does at -O3.
void abort(void);
void
foo (signed char a)
{
  if (a - 0x7F > 1)
    abort();
}
int main()
{
  unsigned char b;
  for(b = 0;b <0xFF;b++)
   foo (b);
}

-- 
           Summary: [4.1 Regression] wrong code for casts and scev
           Product: gcc
           Version: 4.0.1
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: critical
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22236