WebSVN – tendra.SVN – Diff – /trunk/src/installers/alpha/common/inlinechoice.c

+/*
+ * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of The TenDRA Project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific, prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
+ * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ */
 /*
     		 Crown Copyright (c) 1997
     This TenDRA(r) Computer Program is subject to Copyright
     owned by the United Kingdom Secretary of State for Defence
     acting through the Defence Evaluation and Research Agency
     (DERA).  It is made available to Recipients with a
     royalty-free licence for its use, reproduction, transfer
     to other parties and amendment for any purpose not excluding
     product development provided that any such use et cetera
     shall be deemed to be acceptance of the following conditions:-
         (1) Its Recipients shall ensure that this Notice is
         reproduced upon any copies or amended versions of it;
         (2) Any amended version of it shall be clearly marked to
         show both the nature of and the organisation responsible
         for the relevant amendment or amendments;
         (3) Its onward transfer from a recipient to another
         party shall be deemed to be that party's acceptance of
         these conditions;
         (4) DERA gives no warranty or assurance as to its
         quality or suitability for any purpose and DERA accepts
         no liability whatsoever in relation to any use to which
         it may be put.
 */
-/* 	$Id: inlinechoice.c,v 1.1.1.1 1998/01/17 15:56:00 release Exp $	 */
+/* 	$Id$	 */
 #ifndef lint
-static char vcid[] = "$Id: inlinechoice.c,v 1.1.1.1 1998/01/17 15:56:00 release Exp $";
+static char vcid[] = "$Id$";
 #endif /* lint */
 /*
 $Log: inlinechoice.c,v $
  * Revision 1.1.1.1  1998/01/17  15:56:00  release
  * Removed dead code.
+ *
  * Revision 1.8  1995/01/20  15:12:59  john
  * Repaced literal with #define
+ *
 */
 #include "config.h"
 #include "common_types.h"
 #include "installglob.h"
 #include "expmacs.h"
 #include "tags.h"
 #include "flags.h"
 #include "shapemacs.h"
 #include "inl_norm.h"
 #define crit_inline	120
 #define crit_decs	5
 #define crit_decsatapp 5
 #define apply_cost      3
-static int  complexity PROTO_S ((exp e, int count, int newdecs));
+static int  complexity(exp e, int count, int newdecs);
 static last_new_decs = -999;
 /*
     APPLY COMPLEXITY TO A LIST OF EXPRESSIONS
 */
 int sbl
-    PROTO_N ( ( e,count,newdecs ) )
-    PROTO_T ( exp e X int count X int newdecs )
+(exp e, int count, int newdecs)
 {
-  int c = complexity ( e, count, newdecs ) ;
+  int c = complexity(e, count, newdecs);
-  if ( c < 0 ) return ( c ) ;
+  if (c < 0) return(c);
-  if ( last ( e ) ) return ( c ) ;
+  if (last(e)) return(c);
-  return ( sbl ( bro ( e ), c, newdecs ) ) ;
+  return(sbl(bro(e), c, newdecs));
 }
 /*
     FIND THE COMPLEXITY OF AN EXPRESSION
     This routine examines the structure of e to see if its
     complexity(roughly the number of nodes) is greater than
     count.  As soon as the complexity exceeds this value it
     stops.  It returns the difference between count and the
     calculated complexity.
 */
 static int complexity
-    PROTO_N ( ( e,count,newdecs ) )
-    PROTO_T ( exp e X int count X int newdecs )
+(exp e, int count, int newdecs)
+{
-  unsigned char n = name ( e ) ;
+  unsigned char n = name(e);
   last_new_decs = newdecs;
-  if ( count < 0 )
-    return ( -1 ) ;
-  if (newdecs > crit_decs )
-    return ( -2);
-  if ( son ( e ) == nilexp )
-    return ( count ) ;
-  switch ( n ) {
+  if (count < 0)
-    case apply_general_tag :
-    case apply_tag : {
+    return(-1);
-     if ( newdecs > crit_decsatapp )
+  if (newdecs > crit_decs)
-       return ( -3 ) ;
+    return(-2);
-     return ( sbl ( son ( e ),  ( count - apply_cost ),
-		   ( newdecs + 1 ) ) ) ;
+  if (son(e) == nilexp)
-   }
-   case rep_tag : {
+    return(count);
-     return ( complexity ( bro ( son ( e ) ),  ( count - 1 ),
-#if 0
-			  ( ( newdecs > crit_decsatapp ) ? newdecs :
-			   ( crit_decsatapp + 1 ))
-#else
-			  (newdecs + 1)
-#endif
-			  ));
-   }
-   case res_tag : {
-     return ( complexity ( son ( e ),  ( count + 1 ),
-			  newdecs ) ) ;
+  switch (n) {
-	}
-   case ident_tag : {
+    case apply_general_tag:
-     return ( sbl ( son ( e ),  ( count - 1 ),
-		   ( newdecs + 1 ) ) ) ;
-   }
-   case top_tag :
+    case apply_tag: {
-    case clear_tag : {
+     if (newdecs > crit_decsatapp)
-      return ( count ) ;
+       return(-3);
-    }
-   case case_tag : {
-     return ( complexity ( son ( e ),  ( count - 1 ),
+     return(sbl(son(e), (count - apply_cost),
-			  newdecs ) ) ;
+		  (newdecs + 1)));
+   }
+   case rep_tag: {
+     return(complexity(bro(son(e)), (count - 1),
+#if 0
+			 ((newdecs > crit_decsatapp)? newdecs :
+			  (crit_decsatapp + 1))
+#else
+			 (newdecs + 1)
+#endif
+			 ));
+   }
+   case res_tag: {
+     return(complexity(son(e), (count + 1),
+			  newdecs));
+	}
+   case ident_tag: {
+     return(sbl(son(e), (count - 1),
+		  (newdecs + 1)));
+   }
+   case top_tag:
+    case clear_tag: {
+      return(count);
+    }
+   case case_tag: {
+     return(complexity(son(e), (count - 1),
+			  newdecs));
+   }
-   case name_tag :
+   case name_tag:
-    case string_tag :
+    case string_tag:
-     case env_offset_tag : {
+     case env_offset_tag: {
-       return ( count - 1 ) ;
+       return(count - 1);
      }
-   case labst_tag : {
+   case labst_tag: {
-     return ( complexity ( bro ( son ( e ) ), count, newdecs ) ) ;
+     return(complexity(bro(son(e)), count, newdecs));
+   }
-   case solve_tag :
+   case solve_tag:
-   case seq_tag :
+   case seq_tag:
-   case cond_tag : {
+   case cond_tag: {
-       return ( sbl ( son ( e ), count, newdecs ) ) ;
+       return(sbl(son(e), count, newdecs));
      }
    default : {
-     return ( sbl ( son ( e ),  ( count - 1 ), newdecs ) ) ;
+     return(sbl(son(e), (count - 1), newdecs));
+   }
+  }
     /* NOT REACHED */
+}
 #define MASK 3
-#define REJ_ONCE (1)
+#define REJ_ONCE(1)
-#define OK_ONCE  (2)
+#define OK_ONCE (2)
 int inlinechoice
-    PROTO_N ( ( t,def,total_uses ) )
-    PROTO_T ( exp t X exp def X int total_uses )
+(exp t, exp def, int total_uses)
+{
   /* delivers 0 if no uses of this proc can be inlined.
      delivers 1 if this use cannot be inlined
      delivers 2 if this use can be inlined.
      */
   int res;
   exp apars;
   exp fpars;
   int newdecs = 0;
   int max_complexity;
-  int nparam ;
+  int nparam;
-  CONST unsigned int CONST_BONUS_UNIT = 16 ;
+  CONST unsigned int CONST_BONUS_UNIT = 16;
-  int const_param_bonus ;
+  int const_param_bonus;
-  int adjusted_max_complexity ;
+  int adjusted_max_complexity;
   shape shdef = pt(def);
-  if(!eq_shape(sh(father(t)),shdef)){
+  if (!eq_shape(sh(father(t)),shdef)) {
     return 1;
   }
-  nparam = 0 ;
+  nparam = 0;
-  const_param_bonus = 0 ;
+  const_param_bonus = 0;
   /*
   pr_ident = son(t);
   max_complexity = ( 300 / no ( pr_ident ) ) ;*/
   max_complexity = (crit_inline/total_uses);
+  {
 #define QQQ 2
     int i;
-    if (total_uses >=(1<<QQQ))
+    if (total_uses >= (1<<QQQ))
+    {
-      for (i= total_uses >> QQQ ; i>0; i >>=1)
+      for (i= total_uses >> QQQ; i>0; i >>=1)
+      {
 	max_complexity *= 3;
 	max_complexity /= 2;
+      }
+    }
 #undef QQQ
+  }
-  if ( max_complexity < 15 ) {
+  if (max_complexity < 15) {
-    max_complexity = 15 ;
+    max_complexity = 15;
-  } else if ( max_complexity > crit_inline ) {
+  } else if (max_complexity > crit_inline) {
-    max_complexity = crit_inline ;
+    max_complexity = crit_inline;
+  }
   apars = bro(t); /* only uses are applications */
   fpars = son(def);
-  for(;;) {
+  for (;;) {
      if (name(fpars)!=ident_tag || !isparam(fpars)) {
-       if (name(apars) != top_tag) newdecs = 10;
+       if (name(apars)!= top_tag)newdecs = 10;
       	 break;
+     }
-     nparam++ ;
+     nparam++;
      switch (name(apars)) {
       case val_tag: case real_tag: case string_tag: case name_tag:
        break;
       case cont_tag: {
-	if (name(son(apars))==name_tag && isvar(son(son(apars))) &&
+	if (name(son(apars)) ==name_tag && isvar(son(son(apars))) &&
-	    !isvar(fpars) ) break;
+	    !isvar(fpars))break;
       } /* ... else continue */
        FALL_THROUGH
 	default: newdecs++;
+     }
-     switch ( name ( apars ) )
+     switch (name(apars))
+     {
-      case val_tag : {
+      case val_tag: {
-	int n = no ( apars ) ;
+	int n = no(apars);
 	/* Simple constant param. Increase desire to
 	   inline since a constant may cause further
 	   optimisation, eg strength reduction (mul
 	   to shift) or dead code savings */
-#define IS_POW2( c )	( ( c ) != 0 && ( ( c ) & ( ( c ) - 1 ) ) == 0 )
+#define IS_POW2(c)	((c)!= 0 && ((c) & ((c) - 1)) == 0)
-	if ( 0 ) {
+	if (0) {
 	  /* needs a register - poor */
-	  const_param_bonus += CONST_BONUS_UNIT / 4 ;
+	  const_param_bonus += CONST_BONUS_UNIT / 4;
-	} else if ( n == 0 || ( n > 0 && IS_POW2 ( n ) ) ) {
+	} else if (n == 0 || (n > 0 && IS_POW2(n))) {
 	  /* very good */
-	  const_param_bonus += CONST_BONUS_UNIT ;
+	  const_param_bonus += CONST_BONUS_UNIT;
 	} else {
 	  /* less good */
-	  const_param_bonus += CONST_BONUS_UNIT / 2 ;
+	  const_param_bonus += CONST_BONUS_UNIT / 2;
+	}
-	break ;
+	break;
+      }
 #undef IS_POW2
-      case real_tag :
+      case real_tag:
 	/* reals not that useful */
-	const_param_bonus += CONST_BONUS_UNIT / 4 ;
+	const_param_bonus += CONST_BONUS_UNIT / 4;
-	break ;
+	break;
-      case string_tag :
+      case string_tag:
-       case name_tag :
+       case name_tag:
-	 break ;
+	 break;
-      case cont_tag :
+      case cont_tag:
-	if ( name ( son ( apars ) ) == name_tag &&
+	if (name(son(apars)) == name_tag &&
-	    isvar ( son ( son ( apars ) ) ) &&
+	    isvar(son(son(apars))) &&
-	    !isvar ( fpars ) ) {
+	    !isvar(fpars)) {
-	  break ;
+	  break;
+	}
        FALL_THROUGH
       default : {
-	newdecs++ ;
+	newdecs++;
-	break ;
+	break;
+      }
+     }
      fpars = bro(son(fpars));
-     if (last(apars)) break;
+     if (last(apars))break;
      apars = bro(apars);
+   }
-  adjusted_max_complexity = max_complexity ;
+  adjusted_max_complexity = max_complexity;
   /* increase to up to 3 times (average around 2) according
      to const params */
-  if ( nparam != 0 ) {
+  if (nparam != 0) {
     adjusted_max_complexity +=
-      ( 2 * max_complexity * const_param_bonus ) /
+     (2 * max_complexity * const_param_bonus) /
-	( CONST_BONUS_UNIT * nparam ) ;
+	(CONST_BONUS_UNIT * nparam);
   }
   /* increase by number of instructions saved for call */
     adjusted_max_complexity += nparam - newdecs + 1;
-  if ( (complexity ( fpars,  adjusted_max_complexity, newdecs )) >= 0 )
+  if ((complexity(fpars,  adjusted_max_complexity, newdecs)) >= 0)
     res = 2;
   else if (newdecs == 0)
     res = 0;
   else
     res = 1;
   switch (res)
+  {
    case 2:
-    (ptno(def)) |= OK_ONCE;
+   (ptno(def)) |= OK_ONCE;
     break;
    case 1:
-    (ptno(def)) |= REJ_ONCE;
+   (ptno(def)) |= REJ_ONCE;
     break;
    case 0:
-    ;
+   ;
+  }
   return res;
+}

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