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Date: Fri, 27 Feb 2004 23:59:00 -0000
From: "jfran at clip dot dia dot fi dot upm dot es" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20040227235918.14327.jfran@clip.dia.fi.upm.es>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug c/14327] New: -O0 -fdefer-pop generates wrong code
X-Bugzilla-Reason: CC
X-SW-Source: 2004-02/txt/msg02663.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

The following program is not compiled correctly 
and produces a segmentation fault if compiled with
-O0 -fderef-pop. The code is compiled correctly
with -fno-defer-pop, or using a version =<3.2


// 

int code[]={0,0,0,0,1};

void foo(int x) {
  volatile int b;
  b = 0xffffffff;
}

void bar(int *pc) {
  static const void *l[] = {&&lab0, &&end};

  foo(0);
  goto *l[*pc];
 lab0:
  foo(0);
  pc++;
  goto *l[*pc];
 end:
  return;
}

int main() {
  bar(code);
  return 0;
}

-- 
           Summary: -O0 -fdefer-pop generates wrong code
           Product: gcc
           Version: 3.3.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P1
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jfran at clip dot dia dot fi dot upm dot es
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14327