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From: "jakub at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/45085] incorrect -Wuninitialized warning
Date: Tue, 27 Jul 2010 12:42:00 -0000	[thread overview]
Message-ID: <20100727124207.527.qmail@sourceware.org> (raw)
In-Reply-To: <bug-45085-360@http.gcc.gnu.org/bugzilla/>



------- Comment #2 from jakub at gcc dot gnu dot org  2010-07-27 12:42 -------
Simplified testcase for -m32 -O2 -Wuninitialized:

struct S { char *s1; long s2; };
struct T { int t1; long t2; long t3; };
extern int fn2 (void);
extern int fn3 (struct T);
extern struct T fn4 ();
extern int fn5 (char **, long *, int);
extern void fn6 (void);
extern void fn7 (void *);
struct S *fn10 ();
static int p;
static void *q;
extern struct T r;

static struct T
fn8 (struct T x, int y)
{
  struct S *u = fn10 ();
  int v = fn5 (&u->s1, &u->s2, 0);
  while (1)
    {
      if (p)
fn6 ();
      if (fn3 (x))
return fn4 ();
      if (y & 1)
return r;
      v = fn5 (&u->s1, &u->s2, 1);
    }
}

struct T
fn9 (struct T x, int y)
{
  struct T t = fn8 (x, y);
  if (fn2 ())
    fn7 (q);
  return t;
}

void *
fn1 (void)
{
  return fn9;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45085


  parent reply	other threads:[~2010-07-27 12:42 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-26 16:11 [Bug tree-optimization/45085] New: " tromey at gcc dot gnu dot org
2010-07-26 16:13 ` [Bug tree-optimization/45085] " tromey at gcc dot gnu dot org
2010-07-27 12:42 ` jakub at gcc dot gnu dot org [this message]
2010-07-27 12:58 ` jakub at gcc dot gnu dot org
2010-07-27 13:25 ` [Bug tree-optimization/45085] [4.6 Regression] " jakub at gcc dot gnu dot org
2010-07-27 14:13 ` hubicka at gcc dot gnu dot org
2010-08-03 12:09 ` hubicka at gcc dot gnu dot org
2010-09-02 11:11 ` rguenth at gcc dot gnu dot org
2010-09-02 22:59 ` manu at gcc dot gnu dot org
2010-09-03  9:11 ` jakub at gcc dot gnu dot org

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