[Bug fortran/30626] Wrong-code for internal read

[jvdelisle at gcc dot gnu dot org]

------- Comment #3 from jvdelisle at gcc dot gnu dot org  2007-01-30 14:36 
-------
Paul's preliminary patch for pr30284 fixes this bug.  The library side still
shows a potential problem, but we don't hit it with the test cases here because
we are only reading one record.

Here is dump for modified test case in #1:

MAIN__ ()
{
  static char date[1][1:12] = {"200612231200"};
  int4 foo;

  _gfortran_set_std (70, 127, 0, 0);
  {
    int8 D.1365;
    char A.2[1][1:12];
    struct array1_unknown atmp.1;
    struct __st_parameter_dt dt_parm.0;

    dt_parm.0.common.filename = "pr30626-1.f90";
    dt_parm.0.common.line = 4;
    atmp.1.dtype = 817;
    atmp.1.dim[0].stride = 1;
    atmp.1.dim[0].lbound = 0;
    atmp.1.dim[0].ubound = 0;
    atmp.1.data = (void *) &A.2;
    atmp.1.offset = 0;
    {
      int8 S.3;

      S.3 = 0;
      while (1)
        {
          if (S.3 > 0) goto L.1;
          __builtin_memmove (&(*(char[0:][1:12] *) atmp.1.data)[S.3],
&date[NON_LVALUE_EXPR <S.3>], 12);
          S.3 = S.3 + 1;
        }
      L.1:;
    }
    dt_parm.0.internal_unit = (char *) atmp.1.data;
    dt_parm.0.internal_unit_len = 12;
    dt_parm.0.internal_unit_desc = (char *) &atmp.1;
    dt_parm.0.common.unit = 0;
    dt_parm.0.format = "(i4)";
    dt_parm.0.format_len = 4;
    dt_parm.0.common.flags = 20480;
    _gfortran_st_read (&dt_parm.0);
    _gfortran_transfer_integer (&dt_parm.0, &foo, 4);
    _gfortran_st_read_done (&dt_parm.0);
    {
      int8 S.4;

      D.1365 = -1;
      S.4 = 1;
      while (1)
        {
          if (S.4 > 1) goto L.2;
          __builtin_memmove (&date[S.4 + -1], &(*(char[0:][1:12] *)
atmp.1.data)[S.4 + D.1365], 12);
          S.4 = S.4 + 1;
        }
      L.2:;
    }
  }
  {
    struct __st_parameter_dt dt_parm.5;

    dt_parm.5.common.filename = "pr30626-1.f90";
    dt_parm.5.common.line = 5;
    dt_parm.5.common.unit = 6;
    dt_parm.5.common.flags = 128;
    _gfortran_st_write (&dt_parm.5);
    _gfortran_transfer_integer (&dt_parm.5, &foo, 4);
    _gfortran_st_write_done (&dt_parm.5);
  }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30626