dhry.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

  exit (0);
}


Proc_1 (Ptr_Val_Par)
/******************/

REG Rec_Pointer Ptr_Val_Par;
    /* executed once */
{
  REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;  
                                        /* == Ptr_Glob_Next */
  /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
  /* corresponds to "rename" in Ada, "with" in Pascal           */
  
  structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob); 
  Ptr_Val_Par->variant.var_1.Int_Comp = 5;
  Next_Record->variant.var_1.Int_Comp 
        = Ptr_Val_Par->variant.var_1.Int_Comp;
  Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
  Proc_3 (&Next_Record->Ptr_Comp);
    /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp 
                        == Ptr_Glob->Ptr_Comp */
  if (Next_Record->Discr == Ident_1)
    /* then, executed */
  {
    Next_Record->variant.var_1.Int_Comp = 6;
    Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp, 
           &Next_Record->variant.var_1.Enum_Comp);
    Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
    Proc_7 (Next_Record->variant.var_1.Int_Comp, 10, 
           &Next_Record->variant.var_1.Int_Comp);
  }
  else /* not executed */
    structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);
} /* Proc_1 */


Proc_2 (Int_Par_Ref)
/******************/
    /* executed once */
    /* *Int_Par_Ref == 1, becomes 4 */

One_Fifty   *Int_Par_Ref;
{
  One_Fifty  Int_Loc;  
  Enumeration   Enum_Loc;

  Int_Loc = *Int_Par_Ref + 10;
  do /* executed once */
    if (Ch_1_Glob == 'A')
      /* then, executed */
    {
      Int_Loc -= 1;
      *Int_Par_Ref = Int_Loc - Int_Glob;
      Enum_Loc = Ident_1;
    } /* if */
  while (Enum_Loc != Ident_1); /* true */
} /* Proc_2 */


Proc_3 (Ptr_Ref_Par)
/******************/
    /* executed once */
    /* Ptr_Ref_Par becomes Ptr_Glob */

Rec_Pointer *Ptr_Ref_Par;

{
  if (Ptr_Glob != Null)
    /* then, executed */
    *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
  Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
} /* Proc_3 */


Proc_4 () /* without parameters */
/*******/
    /* executed once */
{
  Boolean Bool_Loc;

  Bool_Loc = Ch_1_Glob == 'A';
  Bool_Glob = Bool_Loc | Bool_Glob;
  Ch_2_Glob = 'B';
} /* Proc_4 */


Proc_5 () /* without parameters */
/*******/
    /* executed once */
{
  Ch_1_Glob = 'A';
  Bool_Glob = false;
} /* Proc_5 */


        /* Procedure for the assignment of structures,          */
        /* if the C compiler doesn't support this feature       */
#ifdef  NOSTRUCTASSIGN
memcpy (d, s, l)
register char   *d;
register char   *s;
register int    l;
{
        while (l--) *d++ = *s++;
}
#endif


/*
 ****************************************************************************
 *
 *                   "DHRYSTONE" Benchmark Program
 *                   -----------------------------
 *                                                                            
 *  Version:    C, Version 2.1
 *                                                                            
 *  File:       dhry_2.c (part 3 of 3)
 *
 *  Date:       May 25, 1988
 *
 *  Author:     Reinhold P. Weicker
 *
 ****************************************************************************
 */

#ifndef REG
#define REG
        /* REG becomes defined as empty */
        /* i.e. no register variables   */
#endif

extern  int     Int_Glob;
extern  char    Ch_1_Glob;


Proc_6 (Enum_Val_Par, Enum_Ref_Par)
/*********************************/
    /* executed once */
    /* Enum_Val_Par == Ident_3, Enum_Ref_Par becomes Ident_2 */

Enumeration  Enum_Val_Par;
Enumeration *Enum_Ref_Par;
{
  *Enum_Ref_Par = Enum_Val_Par;
  if (! Func_3 (Enum_Val_Par))
    /* then, not executed */
    *Enum_Ref_Par = Ident_4;
  switch (Enum_Val_Par)
  {
    case Ident_1: 
      *Enum_Ref_Par = Ident_1;
      break;
    case Ident_2: 
      if (Int_Glob > 100)
        /* then */
      *Enum_Ref_Par = Ident_1;
      else *Enum_Ref_Par = Ident_4;
      break;
    case Ident_3: /* executed */
      *Enum_Ref_Par = Ident_2;
      break;
    case Ident_4: break;
    case Ident_5: 
      *Enum_Ref_Par = Ident_3;
      break;
  } /* switch */
} /* Proc_6 */


Proc_7 (Int_1_Par_Val, Int_2_Par_Val, Int_Par_Ref)
/**********************************************/
    /* executed three times                                      */ 
    /* first call:      Int_1_Par_Val == 2, Int_2_Par_Val == 3,  */
    /*                  Int_Par_Ref becomes 7                    */
    /* second call:     Int_1_Par_Val == 10, Int_2_Par_Val == 5, */
    /*                  Int_Par_Ref becomes 17                   */
    /* third call:      Int_1_Par_Val == 6, Int_2_Par_Val == 10, */
    /*                  Int_Par_Ref becomes 18                   */
One_Fifty       Int_1_Par_Val;
One_Fifty       Int_2_Par_Val;
One_Fifty      *Int_Par_Ref;
{
  One_Fifty Int_Loc;

  Int_Loc = Int_1_Par_Val + 2;
  *Int_Par_Ref = Int_2_Par_Val + Int_Loc;
} /* Proc_7 */


Proc_8 (Arr_1_Par_Ref, Arr_2_Par_Ref, Int_1_Par_Val, Int_2_Par_Val)
/*********************************************************************/
    /* executed once      */
    /* Int_Par_Val_1 == 3 */
    /* Int_Par_Val_2 == 7 */
Arr_1_Dim       Arr_1_Par_Ref;
Arr_2_Dim       Arr_2_Par_Ref;
int             Int_1_Par_Val;
int             Int_2_Par_Val;
{
  REG One_Fifty Int_Index;
  REG One_Fifty Int_Loc;

  Int_Loc = Int_1_Par_Val + 5;
  Arr_1_Par_Ref [Int_Loc] = Int_2_Par_Val;
  Arr_1_Par_Ref [Int_Loc+1] = Arr_1_Par_Ref [Int_Loc];
  Arr_1_Par_Ref [Int_Loc+30] = Int_Loc;
  for (Int_Index = Int_Loc; Int_Index <= Int_Loc+1; ++Int_Index)
    Arr_2_Par_Ref [Int_Loc] [Int_Index] = Int_Loc;
  Arr_2_Par_Ref [Int_Loc] [Int_Loc-1] += 1;
  Arr_2_Par_Ref [Int_Loc+20] [Int_Loc] = Arr_1_Par_Ref [Int_Loc];
  Int_Glob = 5;
} /* Proc_8 */


Enumeration Func_1 (Ch_1_Par_Val, Ch_2_Par_Val)
/*************************************************/
    /* executed three times                                         */
    /* first call:      Ch_1_Par_Val == 'H', Ch_2_Par_Val == 'R'    */
    /* second call:     Ch_1_Par_Val == 'A', Ch_2_Par_Val == 'C'    */
    /* third call:      Ch_1_Par_Val == 'B', Ch_2_Par_Val == 'C'    */

Capital_Letter   Ch_1_Par_Val;
Capital_Letter   Ch_2_Par_Val;
{
  Capital_Letter        Ch_1_Loc;
  Capital_Letter        Ch_2_Loc;

  Ch_1_Loc = Ch_1_Par_Val;
  Ch_2_Loc = Ch_1_Loc;
  if (Ch_2_Loc != Ch_2_Par_Val)
    /* then, executed */
    return (Ident_1);
  else  /* not executed */
  {
    Ch_1_Glob = Ch_1_Loc;
    return (Ident_2);
   }
} /* Func_1 */


Boolean Func_2 (Str_1_Par_Ref, Str_2_Par_Ref)
/*************************************************/
    /* executed once */
    /* Str_1_Par_Ref == "DHRYSTONE PROGRAM, 1'ST STRING" */
    /* Str_2_Par_Ref == "DHRYSTONE PROGRAM, 2'ND STRING" */

Str_30  Str_1_Par_Ref;
Str_30  Str_2_Par_Ref;
{
  REG One_Thirty        Int_Loc;
      Capital_Letter    Ch_Loc;

  Int_Loc = 2;
  while (Int_Loc <= 2) /* loop body executed once */
    if (Func_1 (Str_1_Par_Ref[Int_Loc],
                Str_2_Par_Ref[Int_Loc+1]) == Ident_1)
      /* then, executed */
    {
      Ch_Loc = 'A';
      Int_Loc += 1;
    } /* if, while */
  if (Ch_Loc >= 'W' && Ch_Loc < 'Z')
    /* then, not executed */
    Int_Loc = 7;
  if (Ch_Loc == 'R')
    /* then, not executed */
    return (true);
  else /* executed */
  {
    if (strcmp (Str_1_Par_Ref, Str_2_Par_Ref) > 0)
      /* then, not executed */
    {
      Int_Loc += 7;
      Int_Glob = Int_Loc;
      return (true);
    }
    else /* executed */
      return (false);
  } /* if Ch_Loc */
} /* Func_2 */


Boolean Func_3 (Enum_Par_Val)
/***************************/
    /* executed once        */
    /* Enum_Par_Val == Ident_3 */
Enumeration Enum_Par_Val;
{
  Enumeration Enum_Loc;

  Enum_Loc = Enum_Par_Val;
  if (Enum_Loc == Ident_3)
    /* then, executed */
    return (true);
  else /* not executed */
    return (false);
} /* Func_3 */