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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [testsuite/] [gcc.dg/] [attr-warn-unused-result.c] - Blame information for rev 826

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1 298 jeremybenn 
/* warn_unused_result attribute tests.  */
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/* { dg-do compile } */
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/* { dg-options "-O" } */
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#define WUR __attribute__((warn_unused_result))
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#define WURAI __attribute__((warn_unused_result, always_inline)) inline
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typedef WUR int (*fnt) (void);
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typedef struct { long i; } A;
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typedef struct { long i; long j; } B;
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typedef struct { char big[1024]; fnt fn; } C;
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WUR int check1 (void);
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WUR void check2 (void); /* { dg-warning "attribute ignored" } */
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int foo WUR;      /* { dg-warning "only applies" } */
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int bar (void);
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extern WURAI int check3 (void) { return bar (); }
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WUR A check4 (void);
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WUR B check5 (void);
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WUR C check6 (void);
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A bar7 (void);
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B bar8 (void);
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C bar9 (void);
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extern WURAI A check7 (void) { return bar7 (); }
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extern WURAI B check8 (void) { return bar8 (); }
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extern WURAI C check9 (void) { return bar9 (); }
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/* This is useful for checking whether return value of statement
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   expressions (returning int in this case) is used.  */
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extern WURAI int check_int_result (int res) { return res; }
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#define GU(v) ({ int e = 0; (v) = bar (); if ((v) < 23) e = 14; e; })
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fnt fnptr;
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WUR int check10 (void);
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int baz (void);
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extern WURAI int check11 (void) { return baz (); }
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int k;
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void
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test (void)
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{
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  int i = 0, j;
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  const fnt pcheck1 = check1;
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  const fnt pcheck3 = check3;
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  A a;
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  B b;
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  C c;
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  if (check1 ())
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    return;
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  i += check1 ();
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  i += ({ check1 (); });
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  check1 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check1 ();     /* { dg-warning "ignoring return value of" } */
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  check1 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  check2 ();
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  (void) check2 ();
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  check2 (), bar ();
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  if (check3 ())
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    return;
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  i += check3 ();
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  i += ({ check3 (); });
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  check3 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check3 ();     /* { dg-warning "ignoring return value of" } */
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  check3 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  a = check4 ();
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  if (a.i)
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    return;
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  if (check4 ().i)
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    return;
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  if (({ check4 (); }).i)
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    return;
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  check4 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check4 ();     /* { dg-warning "ignoring return value of" } */
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  check4 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  b = check5 ();
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  if (b.i + b.j)
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    return;
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  if (check5 ().j)
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    return;
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  if (({ check5 (); }).j)
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    return;
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  check5 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check5 ();     /* { dg-warning "ignoring return value of" } */
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  check5 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  c = check6 ();
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  if (c.big[12] + c.big[29])
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    return;
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  if (check6 ().big[27])
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    return;
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  if (({ check6 (); }).big[0])
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    return;
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  check6 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check6 ();     /* { dg-warning "ignoring return value of" } */
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  check6 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  a = check7 ();
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  if (a.i)
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    return;
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  if (check7 ().i)
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    return;
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  if (({ check7 (); }).i)
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    return;
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  check7 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check7 ();     /* { dg-warning "ignoring return value of" } */
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  check7 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  b = check8 ();
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  if (b.i + b.j)
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    return;
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  if (check8 ().j)
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    return;
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  if (({ check8 (); }).j)
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    return;
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  check8 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check8 ();     /* { dg-warning "ignoring return value of" } */
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  check8 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  c = check9 ();
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  if (c.big[12] + c.big[29])
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    return;
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  if (check9 ().big[27])
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    return;
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  if (({ check9 (); }).big[0])
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    return;
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  check9 ();            /* { dg-warning "ignoring return value of" } */
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  (void) check9 ();     /* { dg-warning "ignoring return value of" } */
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  check9 (), bar ();    /* { dg-warning "ignoring return value of" } */
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  if (check_int_result (GU (j)))
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    return;
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  i += check_int_result (GU (j));
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  i += ({ check_int_result (GU (j)); });
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  check_int_result (GU (j)); /* { dg-warning "ignoring return value of" } */
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  (void) check_int_result (GU (j)); /* { dg-warning "ignoring return value of" } */
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  check_int_result (GU (j)), bar (); /* { dg-warning "ignoring return value of" } */
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  if (fnptr ())
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    return;
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  i += fnptr ();
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  i += ({ fnptr (); });
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  fnptr ();             /* { dg-warning "ignoring return value of" } */
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  (void) fnptr ();      /* { dg-warning "ignoring return value of" } */
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  fnptr (), bar ();     /* { dg-warning "ignoring return value of" } */
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  fnptr = check1;
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  if (fnptr ())
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    return;
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  i += fnptr ();
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  i += ({ fnptr (); });
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  fnptr ();             /* { dg-warning "ignoring return value of" } */
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  (void) fnptr ();      /* { dg-warning "ignoring return value of" } */
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  fnptr (), bar ();     /* { dg-warning "ignoring return value of" } */
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  fnptr = check3;
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  if (fnptr ())
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    return;
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  i += fnptr ();
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  i += ({ fnptr (); });
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  fnptr ();             /* { dg-warning "ignoring return value of" } */
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  (void) fnptr ();      /* { dg-warning "ignoring return value of" } */
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  fnptr (), bar ();     /* { dg-warning "ignoring return value of" } */
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  if (bar9 ().fn ())
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    return;
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  i += bar9 ().fn ();
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  i += ({ bar9 ().fn (); });
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  bar9 ().fn ();        /* { dg-warning "ignoring return value of" } */
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  (void) bar9 ().fn (); /* { dg-warning "ignoring return value of" } */
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  bar9 ().fn (), bar (); /* { dg-warning "ignoring return value of" } */
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  if ((k ? check1 : check10) ())
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    return;
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  i += (k ? check1 : check10) ();
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  i += ({ (k ? check1 : check10) (); });
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  (k ? check1 : check10) (); /* { dg-warning "ignoring return value of" } */
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  (void) (k ? check1 : check10) (); /* { dg-warning "ignoring return value of" } */
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  (k ? check1 : check10) (), bar (); /* { dg-warning "ignoring return value of" } */
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  if ((k ? check3 : check11) ())
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    return;
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  i += (k ? check3 : check11) ();
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  i += ({ (k ? check3 : check11) (); });
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  (k ? check3 : check11) (); /* { dg-warning "ignoring return value of" } */
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  (void) (k ? check3 : check11) (); /* { dg-warning "ignoring return value of" } */
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  (k ? check3 : check11) (), bar (); /* { dg-warning "ignoring return value of" } */
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  if (pcheck1 ())
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    return;
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  i += pcheck1 ();
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  i += ({ pcheck1 (); });
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  pcheck1 ();           /* { dg-warning "ignoring return value of" } */
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  (void) pcheck1 ();    /* { dg-warning "ignoring return value of" } */
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  pcheck1 (), bar ();   /* { dg-warning "ignoring return value of" } */
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  if (pcheck3 ())
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    return;
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  i += pcheck3 ();
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  i += ({ pcheck3 (); });
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  pcheck3 ();           /* { dg-warning "ignoring return value of" } */
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  (void) pcheck3 ();    /* { dg-warning "ignoring return value of" } */
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  pcheck3 (), bar ();   /* { dg-warning "ignoring return value of" } */
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}

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