[splint.git] / src / forjunk.c

/*
** forjunk.c
*/

//#define DEBUGPRINT 1

# include <ctype.h> /* for isdigit */
# include "lclintMacros.nf"
# include "basic.h"
# include "cgrammar.h"
# include "cgrammar_tokens.h"

# include "exprChecks.h"
# include "exprNodeSList.h"

# include "exprDataQuite.i"

/*@access constraint, exprNode @*/

/*@access constraintExpr @*/

static bool isInc (/*@observer@*/ constraintExpr c) /*@*/
{
  
  llassert(constraintExpr_isDefined(c) );
 if (c->kind == binaryexpr )
    {
      constraintExprBinaryOpKind binOP;
      constraintExpr t1, t2;
      t1 = constraintExprData_binaryExprGetExpr1 (c->data);
      t2 = constraintExprData_binaryExprGetExpr2 (c->data);

      binOP = constraintExprData_binaryExprGetOp (c->data);
      if (binOP == PLUS)
	if (constraintExpr_isLit (t2) && constraintExpr_getValue (t2) == 1 )
	  {
	    return TRUE;
	  }
    }

 return FALSE;
}


// look for constraints like cexrp = cexrp + 1
static bool incVar (/*@notnull@*/ constraint c) /*@*/
{
  constraintExpr t1;
  if (c->ar != EQ)
    {
      return FALSE;
    }
  if (! isInc (c->expr ) )
    return FALSE;

  llassert (constraintExpr_isDefined(c->expr) );
  llassert (c->expr->kind == binaryexpr);

  t1 = constraintExprData_binaryExprGetExpr1 (c->expr->data);
  if (constraintExpr_similar (c->lexpr, t1) )
    return TRUE;

  return FALSE;
}
/*@noaccess constraintExpr @*/


static bool increments (/*@observer@*/ constraint c,
			/*@observer@*/ constraintExpr var)
{
  llassert(constraint_isDefined(c) );

  if (constraint_isUndefined(c) )
    {
      return FALSE;
    }

  llassert (incVar (c));
  if (constraintExpr_similar (c->lexpr, var) )
    return TRUE;
  else
    return FALSE;
}

static bool canGetForTimes (/*@notnull@*/ exprNode forPred, /*@notnull@*/ exprNode forBody)
{
  
  exprNode init, test, inc, t1, t2;
  lltok tok;
  
  llassert(exprNode_isDefined (forPred) );
  llassert(exprNode_isDefined (forBody) );

  init  =  exprData_getTripleInit (forPred->edata);
  test  =   exprData_getTripleTest (forPred->edata);
  inc   =   exprData_getTripleInc (forPred->edata);

  llassert(exprNode_isDefined(test) );

  if (exprNode_isUndefined(test) )
    {
      return FALSE;
    }

  llassert(exprNode_isDefined(inc) );

  if (exprNode_isUndefined(inc) )
    {
      return FALSE;
    }

  if (test->kind != XPR_PREOP)
    return FALSE;
      
  tok = (exprData_getUopTok (test->edata));
  if (!lltok_isMult (tok) )
    {
      return FALSE;
    }

  //should check preop too
  if (inc->kind != XPR_POSTOP)
    {
      return FALSE;
    }
  
  tok = (exprData_getUopTok (inc->edata));
  if (lltok_isInc_Op (tok) )
      {
	t1 = exprData_getUopNode (test->edata);
	t2 = exprData_getUopNode (inc->edata);
	llassert(exprNode_isDefined(t2) && exprNode_isDefined(t2)  );

	if (exprNode_isUndefined(t1) || exprNode_isUndefined(t2)  )
	  {
	    return FALSE;
	  }

	if (sRef_sameName (t1->sref, t2->sref) )
	  {
	    return TRUE;
	  }
      }
  return FALSE;
}

static /*@only@*/ constraintList getLessThanConstraints (/*@observer@*/ constraintList c)
{
  constraintList ret;

  ret = constraintList_makeNew();
  constraintList_elements (c, el)
    {
      llassert(constraint_isDefined(el));
      if ( constraint_isUndefined(el)  )
      	continue;
      
      if (el->ar == LT || el->ar == LTE)
	{
	  constraint temp;
	  temp = constraint_copy(el);

	  ret = constraintList_add (ret, temp);
	}
    }
  end_constraintList_elements;

  return ret;
}

static /*@only@*/ constraintList getIncConstraints (/*@observer@*/ constraintList c)
{
  constraintList ret;

  ret = constraintList_makeNew();
  constraintList_elements (c, el)
    {
      llassert (constraint_isDefined (el));

      if (incVar (el) )
	{
	  constraint temp;
	  temp = constraint_copy(el);
	  ret = constraintList_add (ret, temp);
	}
    }
  end_constraintList_elements;
  
  return ret;
}

static /*@only@*/ constraintExpr getForTimes (/*@notnull@*/ exprNode forPred, /*@notnull@*/ exprNode forBody)
{
  
  exprNode init, test, inc, t1, t2;
  constraintList ltCon;
  constraintList incCon;
  constraintExpr ret;
  
  lltok tok;
  
  init  =  exprData_getTripleInit (forPred->edata);
  test  =  exprData_getTripleTest (forPred->edata);
  inc   =  exprData_getTripleInc (forPred->edata);

  llassert(exprNode_isDefined(test) );
  llassert(exprNode_isDefined(inc) );
  
  ltCon =  getLessThanConstraints (test->trueEnsuresConstraints);
  incCon = getIncConstraints (inc->ensuresConstraints);
  
  DPRINTF(( message ("getForTimes: ltCon: %s from %s", constraintList_print(ltCon), constraintList_print(test->trueEnsuresConstraints) ) ));
  
  DPRINTF(( message ("getForTimes: incCon: %s from %s", constraintList_print(incCon), constraintList_print(inc->ensuresConstraints) ) ));
   
  constraintList_elements (ltCon, el) 
    {
      constraintList_elements(incCon, el2)
      {
	if ( increments(el2, el->lexpr) )
	  {
	    DPRINTF(( message ("getForTimes: %s increments %s", constraint_print(el2), constraint_print(el) ) ));
	    ret =  constraintExpr_copy (el->expr);
	    constraintList_free(ltCon);
	    constraintList_free(incCon);
	    return ret;

	  }
	else
	  DPRINTF(( message ("getForTimes: %s doesn't increment %s", constraint_print(el2), constraint_print(el) )   ));
      }
      end_constraintList_elements;
    }

  end_constraintList_elements;

  constraintList_free(ltCon);
  constraintList_free(incCon);
  
  DPRINTF (( message ("getForTimes: %s  %s resorting to ugly hack", exprNode_unparse(forPred), exprNode_unparse(forBody) ) ));
  if (! canGetForTimes (forPred, forBody) )
    {
      return NULL;
    }


  if (test->kind != XPR_PREOP)
    llassert (FALSE);
      
  tok = (exprData_getUopTok (test->edata));
  if (!lltok_isMult (tok) )
    {
      llassert ( FALSE );
    }

  //should check preop too
  if (inc->kind != XPR_POSTOP)
    {
      llassert (FALSE );
    }
  
  tok = (exprData_getUopTok (inc->edata));
  if (lltok_isInc_Op (tok) )
      {
	t1 = exprData_getUopNode (test->edata);
	t2 = exprData_getUopNode (inc->edata);
	if (sRef_sameName (t1->sref, t2->sref) )
	  {
	    return (constraintExpr_makeMaxSetExpr (t1) );
	  }
      }
  llassert( FALSE);
  BADEXIT;
}

/*@access constraintExpr @*/

static /*@only@*/ constraintExpr constraintExpr_searchAndAdd (/*@only@*/ constraintExpr c, /*@observer@*/ constraintExpr find, /*@observer@*/ constraintExpr add)
{
  constraintExprKind kind;
  constraintExpr temp;

  DPRINTF(( message ("Doing constraintExpr_searchAndAdd  %s %s %s ",
		     constraintExpr_unparse(c), constraintExpr_unparse(find), constraintExpr_unparse(add) ) ) );
  
  if ( constraintExpr_similar (c, find) )
    {

      constraintExpr newExpr;
      
      cstring cPrint;
      
      cPrint = constraintExpr_unparse(c);
      
      
      newExpr = constraintExpr_makeAddExpr (c, constraintExpr_copy(add) );

      DPRINTF((message ("Replacing %q with %q",
			cPrint, constraintExpr_unparse(newExpr)
			)));
      return newExpr;
    }

  kind = c->kind;
  
  switch (kind)
    {
    case term:
      break;      
    case unaryExpr:
      temp = constraintExprData_unaryExprGetExpr (c->data);
      temp = constraintExpr_searchAndAdd (constraintExpr_copy(temp), find, add);
      c->data = constraintExprData_unaryExprSetExpr (c->data, temp);
      break;           
    case binaryexpr:
      
      temp = constraintExprData_binaryExprGetExpr1 (c->data);
      temp = constraintExpr_searchAndAdd (constraintExpr_copy(temp), find, add);
      c->data = constraintExprData_binaryExprSetExpr1 (c->data, temp);
       
      temp = constraintExprData_binaryExprGetExpr2 (c->data);
      temp = constraintExpr_searchAndAdd (constraintExpr_copy(temp), find, add);
      c->data = constraintExprData_binaryExprSetExpr2 (c->data, temp);
      break;
    default:
      llassert(FALSE);
    }
  return c;
  
}

/*@noaccess constraintExpr @*/

static constraint  constraint_searchAndAdd (/*@returned@*/ constraint c, /*@observer@*/ constraintExpr find, /*@observer@*/ constraintExpr add)
{
  
  llassert (constraint_search (c, find)  );
  DPRINTF(( message ("Doing constraint_searchAndAdd  %s %s %s ",
		     constraint_print(c), constraintExpr_unparse(find), constraintExpr_unparse(add) ) ) );
  
  c->lexpr = constraintExpr_searchAndAdd (c->lexpr, find, add);
  c->expr =  constraintExpr_searchAndAdd (c->expr, find, add);

   c = constraint_simplify (c);
   c = constraint_simplify (c);

  return c;
  
}

 static constraintList constraintList_searchAndAdd (/*@returned@*/ constraintList list,
						   /*@observer@*/ constraintExpr find, /*@observer@*/ constraintExpr add)
{
  constraintList newConstraints;
  constraintList ret;
  
  newConstraints = constraintList_makeNew();
  
  constraintList_elements (list, el)
    {
      if (constraint_search (el, find) )
	{
	  constraint newExpr;
	  newExpr = constraint_copy (el);

	  newExpr = constraint_searchAndAdd (newExpr, find, add);
	  	  DPRINTF (( (message ("Adding constraint %s ", constraint_print (newExpr)) )  ));
	  newConstraints = constraintList_add (newConstraints, newExpr);
	}

    }
  end_constraintList_elements;
  
  ret =  constraintList_addListFree (list, newConstraints);
  return ret;
}

static void doAdjust(/*@unused@*/ exprNode e, /*@unused@*/ exprNode forPred, /*@observer@*/ exprNode forBody, /*@observer@*/ constraintExpr iterations)
{
  
  constraintList_elements (forBody->ensuresConstraints, el)
    {
      // look for var = var + 1
      if (incVar(el) )
	{
	  DPRINTF((message ("Found inc variable constraint : %s", constraint_print (el) )  ));
	  forBody->requiresConstraints = constraintList_searchAndAdd(forBody->requiresConstraints, el->lexpr, iterations);
	}
    }
  end_constraintList_elements;
}

void exprNode_forLoopHeuristics( exprNode e, exprNode forPred, exprNode forBody)
{
  exprNode init, test, inc;

  constraintExpr iterations;
  
  init  =  exprData_getTripleInit (forPred->edata);
  test =   exprData_getTripleTest (forPred->edata);
  inc  =   exprData_getTripleInc (forPred->edata);

  if (exprNode_isError (test) || exprNode_isError (inc) )
    return;
  
  iterations = getForTimes (forPred, forBody );

  if (constraintExpr_isDefined (iterations) )
    {
      doAdjust ( e, forPred, forBody, iterations);
      constraintExpr_free(iterations);
    }
}


/*    else */
/*      { */
/*        DPRINTF (("Can't get for time ")); */
/*      } */
  
/*    if (exprNode_isError(init) ) */
/*      { */
/*        return; */
/*      } */
  
/*    if (init->kind == XPR_ASSIGN) */
/*      { */
/*        t1 = exprData_getOpA (init->edata); */
/*        t2 = exprData_getOpB (init->edata); */
      
/*        if (! (t1->kind == XPR_VAR) ) */
/*  	return; */
/*      } */
/*    else */
/*      return; */
  
/*    if (test->kind == XPR_FETCH) */
/*      { */
/*        t3 = exprData_getPairA (test->edata); */
/*        t4 = exprData_getPairB (test->edata); */
      
/*        if (sRef_sameName(t1->sref, t4->sref) ) */
/*  	{ */
/*  	  DPRINTF((message ("Found a for loop matching heuristic:%s", exprNode_unparse (forPred) ) )); */
/*  	  con = constraint_makeEnsureLteMaxRead(t1, t3); */
/*  	  forPred->ensuresConstraints = constraintList_add(forPred->ensuresConstraints, con);	   */
/*  	} */
/*        else */
/*  	{ */
/*  	  DPRINTF((message ("Didn't Find a for loop matching heuristic:%s %s and %s differ", exprNode_unparse (forPred), exprNode_unparse(t1), exprNode_unparse(t3) ) )); */
/*  	} */
/*        return; */
/*      } */
Commit	Line	Data
3aaedf88	1	/*
	2	** forjunk.c
	3	*/
	4
	5	//#define DEBUGPRINT 1
	6
	7	# include <ctype.h> /* for isdigit */
	8	# include "lclintMacros.nf"
	9	# include "basic.h"
	10	# include "cgrammar.h"
	11	# include "cgrammar_tokens.h"
	12
	13	# include "exprChecks.h"
3aaedf88	14	# include "exprNodeSList.h"
3aaedf88	15
3aaedf88	16	# include "exprDataQuite.i"
3aaedf88	17
84c9ffbf	18	/@access constraint, exprNode @/
	19
	20	/@access constraintExpr @/
	21
bb25bea6	22	static bool isInc (/@observer@/ constraintExpr c) /@/
84c9ffbf	23	{
	24
	25	llassert(constraintExpr_isDefined(c) );
	26	if (c->kind == binaryexpr )
	27	{
	28	constraintExprBinaryOpKind binOP;
	29	constraintExpr t1, t2;
	30	t1 = constraintExprData_binaryExprGetExpr1 (c->data);
	31	t2 = constraintExprData_binaryExprGetExpr2 (c->data);
	32
	33	binOP = constraintExprData_binaryExprGetOp (c->data);
	34	if (binOP == PLUS)
	35	if (constraintExpr_isLit (t2) && constraintExpr_getValue (t2) == 1 )
	36	{
	37	return TRUE;
	38	}
	39	}
	40
	41	return FALSE;
	42	}
	43
	44
3aaedf88	45
3aaedf88	46	// look for constraints like cexrp = cexrp + 1
84c9ffbf	47	static bool incVar (/@notnull@/ constraint c) /@/
3aaedf88	48	{
	49	constraintExpr t1;
	50	if (c->ar != EQ)
	51	{
	52	return FALSE;
	53	}
	54	if (! isInc (c->expr ) )
	55	return FALSE;
	56
84c9ffbf	57	llassert (constraintExpr_isDefined(c->expr) );
3aaedf88	58	llassert (c->expr->kind == binaryexpr);
84c9ffbf	59
3aaedf88	60	t1 = constraintExprData_binaryExprGetExpr1 (c->expr->data);
	61	if (constraintExpr_similar (c->lexpr, t1) )
	62	return TRUE;
	63
	64	return FALSE;
	65	}
84c9ffbf	66	/@noaccess constraintExpr @/
3aaedf88	67
3aaedf88	68
bb25bea6	69	static bool increments (/@observer@/ constraint c,
bb25bea6	70	/@observer@/ constraintExpr var)
3aaedf88	71	{
84c9ffbf	72	llassert(constraint_isDefined(c) );
	73
	74	if (constraint_isUndefined(c) )
	75	{
	76	return FALSE;
	77	}
	78
3aaedf88	79	llassert (incVar (c));
	80	if (constraintExpr_similar (c->lexpr, var) )
	81	return TRUE;
	82	else
	83	return FALSE;
	84	}
	85
84c9ffbf	86	static bool canGetForTimes (/@notnull@/ exprNode forPred, /@notnull@/ exprNode forBody)
3aaedf88	87	{
	88
	89	exprNode init, test, inc, t1, t2;
	90	lltok tok;
	91
84c9ffbf	92	llassert(exprNode_isDefined (forPred) );
	93	llassert(exprNode_isDefined (forBody) );
	94
3aaedf88	95	init = exprData_getTripleInit (forPred->edata);
	96	test = exprData_getTripleTest (forPred->edata);
	97	inc = exprData_getTripleInc (forPred->edata);
	98
84c9ffbf	99	llassert(exprNode_isDefined(test) );
	100
	101	if (exprNode_isUndefined(test) )
	102	{
	103	return FALSE;
	104	}
	105
	106	llassert(exprNode_isDefined(inc) );
	107
	108	if (exprNode_isUndefined(inc) )
	109	{
	110	return FALSE;
	111	}
	112
3aaedf88	113	if (test->kind != XPR_PREOP)
	114	return FALSE;
	115
	116	tok = (exprData_getUopTok (test->edata));
	117	if (!lltok_isMult (tok) )
	118	{
	119	return FALSE;
	120	}
	121
	122	//should check preop too
	123	if (inc->kind != XPR_POSTOP)
	124	{
	125	return FALSE;
	126	}
	127
	128	tok = (exprData_getUopTok (inc->edata));
	129	if (lltok_isInc_Op (tok) )
	130	{
	131	t1 = exprData_getUopNode (test->edata);
	132	t2 = exprData_getUopNode (inc->edata);
84c9ffbf	133	llassert(exprNode_isDefined(t2) && exprNode_isDefined(t2) );
	134
	135	if (exprNode_isUndefined(t1) \|\| exprNode_isUndefined(t2) )
	136	{
	137	return FALSE;
	138	}
	139
3aaedf88	140	if (sRef_sameName (t1->sref, t2->sref) )
	141	{
	142	return TRUE;
	143	}
	144	}
	145	return FALSE;
	146	}
	147
bb25bea6	148	static /@only@/ constraintList getLessThanConstraints (/@observer@/ constraintList c)
3aaedf88	149	{
	150	constraintList ret;
	151
c3e695ff	152	ret = constraintList_makeNew();
3aaedf88	153	constraintList_elements (c, el)
3aaedf88	154	{
84c9ffbf	155	llassert(constraint_isDefined(el));
	156	if ( constraint_isUndefined(el) )
	157	continue;
	158
3aaedf88	159	if (el->ar == LT \|\| el->ar == LTE)
3aaedf88	160	{
d46ce6a4	161	constraint temp;
	162	temp = constraint_copy(el);
	163
	164	ret = constraintList_add (ret, temp);
3aaedf88	165	}
	166	}
	167	end_constraintList_elements;
	168
	169	return ret;
	170	}
	171
bb25bea6	172	static /@only@/ constraintList getIncConstraints (/@observer@/ constraintList c)
3aaedf88	173	{
	174	constraintList ret;
	175
c3e695ff	176	ret = constraintList_makeNew();
3aaedf88	177	constraintList_elements (c, el)
3aaedf88	178	{
60eced23	179	llassert (constraint_isDefined (el));
60eced23	180
3aaedf88	181	if (incVar (el) )
3aaedf88	182	{
d46ce6a4	183	constraint temp;
	184	temp = constraint_copy(el);
	185	ret = constraintList_add (ret, temp);
3aaedf88	186	}
	187	}
	188	end_constraintList_elements;
	189
	190	return ret;
	191	}
	192
bb25bea6	193	static /@only@/ constraintExpr getForTimes (/@notnull@/ exprNode forPred, /@notnull@/ exprNode forBody)
3aaedf88	194	{
	195
	196	exprNode init, test, inc, t1, t2;
	197	constraintList ltCon;
	198	constraintList incCon;
bb25bea6	199	constraintExpr ret;
3aaedf88	200
	201	lltok tok;
	202
	203	init = exprData_getTripleInit (forPred->edata);
	204	test = exprData_getTripleTest (forPred->edata);
	205	inc = exprData_getTripleInc (forPred->edata);
	206
84c9ffbf	207	llassert(exprNode_isDefined(test) );
84c9ffbf	208	llassert(exprNode_isDefined(inc) );
3aaedf88	209
	210	ltCon = getLessThanConstraints (test->trueEnsuresConstraints);
	211	incCon = getIncConstraints (inc->ensuresConstraints);
	212
	213	DPRINTF(( message ("getForTimes: ltCon: %s from %s", constraintList_print(ltCon), constraintList_print(test->trueEnsuresConstraints) ) ));
	214
	215	DPRINTF(( message ("getForTimes: incCon: %s from %s", constraintList_print(incCon), constraintList_print(inc->ensuresConstraints) ) ));
	216
	217	constraintList_elements (ltCon, el)
	218	{
dc92450f	219	constraintList_elements(incCon, el2)
3aaedf88	220	{
	221	if ( increments(el2, el->lexpr) )
	222	{
	223	DPRINTF(( message ("getForTimes: %s increments %s", constraint_print(el2), constraint_print(el) ) ));
bb25bea6	224	ret = constraintExpr_copy (el->expr);
	225	constraintList_free(ltCon);
	226	constraintList_free(incCon);
	227	return ret;
3aaedf88	228
	229	}
	230	else
	231	DPRINTF(( message ("getForTimes: %s doesn't increment %s", constraint_print(el2), constraint_print(el) ) ));
	232	}
	233	end_constraintList_elements;
	234	}
	235
	236	end_constraintList_elements;
bb25bea6	237
	238	constraintList_free(ltCon);
	239	constraintList_free(incCon);
3aaedf88	240
	241	DPRINTF (( message ("getForTimes: %s %s resorting to ugly hack", exprNode_unparse(forPred), exprNode_unparse(forBody) ) ));
	242	if (! canGetForTimes (forPred, forBody) )
	243	{
	244	return NULL;
	245	}
	246
	247
	248	if (test->kind != XPR_PREOP)
	249	llassert (FALSE);
	250
	251	tok = (exprData_getUopTok (test->edata));
	252	if (!lltok_isMult (tok) )
	253	{
	254	llassert ( FALSE );
	255	}
	256
	257	//should check preop too
	258	if (inc->kind != XPR_POSTOP)
	259	{
	260	llassert (FALSE );
	261	}
	262
	263	tok = (exprData_getUopTok (inc->edata));
	264	if (lltok_isInc_Op (tok) )
	265	{
	266	t1 = exprData_getUopNode (test->edata);
	267	t2 = exprData_getUopNode (inc->edata);
	268	if (sRef_sameName (t1->sref, t2->sref) )
	269	{
	270	return (constraintExpr_makeMaxSetExpr (t1) );
	271	}
	272	}
	273	llassert( FALSE);
	274	BADEXIT;
	275	}
	276
84c9ffbf	277	/@access constraintExpr @/
3aaedf88	278
bb25bea6	279	static /@only@/ constraintExpr constraintExpr_searchAndAdd (/@only@/ constraintExpr c, /@observer@/ constraintExpr find, /@observer@/ constraintExpr add)
3aaedf88	280	{
	281	constraintExprKind kind;
	282	constraintExpr temp;
	283
	284	DPRINTF(( message ("Doing constraintExpr_searchAndAdd %s %s %s ",
	285	constraintExpr_unparse(c), constraintExpr_unparse(find), constraintExpr_unparse(add) ) ) );
	286
	287	if ( constraintExpr_similar (c, find) )
	288	{
3aaedf88	289
28bf4b0b	290	constraintExpr newExpr;
bb25bea6	291
	292	cstring cPrint;
	293
	294	cPrint = constraintExpr_unparse(c);
	295
	296
28bf4b0b	297	newExpr = constraintExpr_makeAddExpr (c, constraintExpr_copy(add) );
3aaedf88	298
bb25bea6	299	DPRINTF((message ("Replacing %q with %q",
28bf4b0b	300	cPrint, constraintExpr_unparse(newExpr)
3aaedf88	301	)));
28bf4b0b	302	return newExpr;
3aaedf88	303	}
	304
	305	kind = c->kind;
	306
	307	switch (kind)
	308	{
	309	case term:
	310	break;
	311	case unaryExpr:
	312	temp = constraintExprData_unaryExprGetExpr (c->data);
bb25bea6	313	temp = constraintExpr_searchAndAdd (constraintExpr_copy(temp), find, add);
3aaedf88	314	c->data = constraintExprData_unaryExprSetExpr (c->data, temp);
	315	break;
	316	case binaryexpr:
	317
	318	temp = constraintExprData_binaryExprGetExpr1 (c->data);
bb25bea6	319	temp = constraintExpr_searchAndAdd (constraintExpr_copy(temp), find, add);
3aaedf88	320	c->data = constraintExprData_binaryExprSetExpr1 (c->data, temp);
	321
	322	temp = constraintExprData_binaryExprGetExpr2 (c->data);
bb25bea6	323	temp = constraintExpr_searchAndAdd (constraintExpr_copy(temp), find, add);
3aaedf88	324	c->data = constraintExprData_binaryExprSetExpr2 (c->data, temp);
	325	break;
	326	default:
	327	llassert(FALSE);
	328	}
	329	return c;
	330
	331	}
	332
84c9ffbf	333	/@noaccess constraintExpr @/
84c9ffbf	334
bb25bea6	335	static constraint constraint_searchAndAdd (/@returned@/ constraint c, /@observer@/ constraintExpr find, /@observer@/ constraintExpr add)
3aaedf88	336	{
	337
	338	llassert (constraint_search (c, find) );
	339	DPRINTF(( message ("Doing constraint_searchAndAdd %s %s %s ",
	340	constraint_print(c), constraintExpr_unparse(find), constraintExpr_unparse(add) ) ) );
	341
	342	c->lexpr = constraintExpr_searchAndAdd (c->lexpr, find, add);
	343	c->expr = constraintExpr_searchAndAdd (c->expr, find, add);
	344
	345	c = constraint_simplify (c);
	346	c = constraint_simplify (c);
	347
	348	return c;
	349
	350	}
	351
28bf4b0b	352	static constraintList constraintList_searchAndAdd (/@returned@/ constraintList list,
bb25bea6	353	/@observer@/ constraintExpr find, /@observer@/ constraintExpr add)
3aaedf88	354	{
	355	constraintList newConstraints;
	356	constraintList ret;
	357
c3e695ff	358	newConstraints = constraintList_makeNew();
3aaedf88	359
	360	constraintList_elements (list, el)
	361	{
	362	if (constraint_search (el, find) )
	363	{
28bf4b0b	364	constraint newExpr;
28bf4b0b	365	newExpr = constraint_copy (el);
3aaedf88	366
28bf4b0b	367	newExpr = constraint_searchAndAdd (newExpr, find, add);
	368	DPRINTF (( (message ("Adding constraint %s ", constraint_print (newExpr)) ) ));
	369	newConstraints = constraintList_add (newConstraints, newExpr);
3aaedf88	370	}
	371
	372	}
	373	end_constraintList_elements;
	374
4ab867d6	375	ret = constraintList_addListFree (list, newConstraints);
3aaedf88	376	return ret;
	377	}
	378
bb25bea6	379	static void doAdjust(/@unused@/ exprNode e, /@unused@/ exprNode forPred, /@observer@/ exprNode forBody, /@observer@/ constraintExpr iterations)
3aaedf88	380	{
	381
	382	constraintList_elements (forBody->ensuresConstraints, el)
	383	{
84c9ffbf	384	// look for var = var + 1
3aaedf88	385	if (incVar(el) )
	386	{
	387	DPRINTF((message ("Found inc variable constraint : %s", constraint_print (el) ) ));
	388	forBody->requiresConstraints = constraintList_searchAndAdd(forBody->requiresConstraints, el->lexpr, iterations);
	389	}
	390	}
	391	end_constraintList_elements;
	392	}
	393
28bf4b0b	394	void exprNode_forLoopHeuristics( exprNode e, exprNode forPred, exprNode forBody)
3aaedf88	395	{
84c9ffbf	396	exprNode init, test, inc;
84c9ffbf	397
3aaedf88	398	constraintExpr iterations;
	399
	400	init = exprData_getTripleInit (forPred->edata);
	401	test = exprData_getTripleTest (forPred->edata);
	402	inc = exprData_getTripleInc (forPred->edata);
	403
	404	if (exprNode_isError (test) \|\| exprNode_isError (inc) )
	405	return;
	406
	407	iterations = getForTimes (forPred, forBody );
	408
28bf4b0b	409	if (constraintExpr_isDefined (iterations) )
3aaedf88	410	{
3aaedf88	411	doAdjust ( e, forPred, forBody, iterations);
bb25bea6	412	constraintExpr_free(iterations);
3aaedf88	413	}
3aaedf88	414	}
	415
	416
	417	/* else */
	418	/* { */
	419	/* DPRINTF (("Can't get for time ")); */
	420	/* } */
	421
	422	/* if (exprNode_isError(init) ) */
	423	/* { */
	424	/* return; */
	425	/* } */
	426
	427	/* if (init->kind == XPR_ASSIGN) */
	428	/* { */
	429	/* t1 = exprData_getOpA (init->edata); */
	430	/* t2 = exprData_getOpB (init->edata); */
	431
	432	/* if (! (t1->kind == XPR_VAR) ) */
	433	/* return; */
	434	/* } */
	435	/* else */
	436	/* return; */
	437
	438	/* if (test->kind == XPR_FETCH) */
	439	/* { */
	440	/* t3 = exprData_getPairA (test->edata); */
	441	/* t4 = exprData_getPairB (test->edata); */
	442
	443	/* if (sRef_sameName(t1->sref, t4->sref) ) */
	444	/* { */
	445	/* DPRINTF((message ("Found a for loop matching heuristic:%s", exprNode_unparse (forPred) ) )); */
	446	/* con = constraint_makeEnsureLteMaxRead(t1, t3); */
	447	/* forPred->ensuresConstraints = constraintList_add(forPred->ensuresConstraints, con); */
	448	/* } */
	449	/* else */
	450	/* { */
	451	/* DPRINTF((message ("Didn't Find a for loop matching heuristic:%s %s and %s differ", exprNode_unparse (forPred), exprNode_unparse(t1), exprNode_unparse(t3) ) )); */
	452	/* } */
	453	/* return; */
	454	/* } */