From ae5dded36f14f7749db66c57bccdc6b3f412e9a2 Mon Sep 17 00:00:00 2001
From: ceriel <none@none>
Date: Thu, 31 Jan 1991 15:17:04 +0000
Subject: [PATCH] simplified 'tes' mechanism

---
 util/opt/alloc.c   | 10 ----------
 util/opt/alloc.h   |  1 -
 util/opt/process.c |  1 -
 util/opt/proinf.h  |  3 ++-
 util/opt/reg.c     | 15 ++++++++-------
 util/opt/tes.c     | 38 +++++++-------------------------------
 util/opt/tes.h     | 12 ------------
 7 files changed, 17 insertions(+), 63 deletions(-)

diff --git a/util/opt/alloc.c b/util/opt/alloc.c
index fee07b9da..8687eb66f 100644
--- a/util/opt/alloc.c
+++ b/util/opt/alloc.c
@@ -172,16 +172,6 @@ oldnum(lp) num_p lp; {
 	oldcore((short *) lp,sizeof(num_t));
 }
 
-lblst_p newlblst() {
-
-	return((lblst_p) newcore(sizeof(lblst_t)));
-}
-
-oldlblst(lbp) lblst_p lbp; {
-
-	oldcore((short *) lbp, sizeof(lblst_t));
-}
-
 offset *newrom() {
 
 	return((offset *) newcore(MAXROM*sizeof(offset)));
diff --git a/util/opt/alloc.h b/util/opt/alloc.h
index 547771167..788fd9c8f 100644
--- a/util/opt/alloc.h
+++ b/util/opt/alloc.h
@@ -8,7 +8,6 @@ extern line_p 	newline();
 extern offset	*newrom();
 extern sym_p	newsym();
 extern num_p	newnum();
-extern lblst_p	newlblst();
 extern arg_p	newarg();
 extern argb_p	newargb();
 extern reg_p	newreg();
diff --git a/util/opt/process.c b/util/opt/process.c
index ccf86caef..9f860f0d9 100644
--- a/util/opt/process.c
+++ b/util/opt/process.c
@@ -104,7 +104,6 @@ symknown() {
 cleanlocals() {
 	register num_p *npp,np,tp;
 
-	delete_labels();
 	for (npp = curpro.numhash; npp < &curpro.numhash[NNUMHASH]; npp++) {
 		np = *npp;
 		while (np != (num_p) 0) {
diff --git a/util/opt/proinf.h b/util/opt/proinf.h
index 8638e9013..ae18c4b53 100644
--- a/util/opt/proinf.h
+++ b/util/opt/proinf.h
@@ -10,7 +10,7 @@ struct num {
 	unsigned n_jumps;
 	num_p	n_repl;
 	short	n_flags;
-	lblst_p	n_lst_elt;
+	short	n_size;		/* size of element on top at this label */
 	line_p	n_line;
 };
 
@@ -22,6 +22,7 @@ struct num {
 #define NUMSCAN		000020
 #define NUMSET		000040
 #define NUMCOND		000100
+#define NUMFALLTHROUGH	000200
 
 #define NNUMHASH	37
 extern num_p	numlookup();
diff --git a/util/opt/reg.c b/util/opt/reg.c
index cbe8a3617..a040dd450 100644
--- a/util/opt/reg.c
+++ b/util/opt/reg.c
@@ -80,18 +80,19 @@ outregs() {
 
 /* outtes() handles the output of the top elt. messages */
 outtes() {
-	register lblst_p lp = est_list;
+	register num_p *npp, np;
 
-	while(lp != NULL) {
-		if ((lp->ll_size != 0) && !(lp->ll_num->n_flags & NUMCOND)) {
+	for (npp=curpro.numhash;npp< &curpro.numhash[NNUMHASH]; npp++) {
+		for (np = *npp; np != (num_p) 0; np=np->n_next) {
+			if (! (np->n_flags & NUMSET) || np->n_size == 0 ||
+			    (np->n_flags & NUMCOND)) continue;
 			outinst(ps_mes);
 			outoff((offset)ms_tes);
-			outoff((offset)lp->ll_num->n_number);
-			outoff((offset)lp->ll_size);
-			outoff((offset)lp->ll_fallthrough);
+			outoff((offset)np->n_number);
+			outoff((offset)np->n_size);
+			outoff((offset)((np->n_flags & NUMFALLTHROUGH) ? 1 : 0));
 			outinst(sp_cend);
 		}
-		lp = lp->ll_next;
 	}
 }
 
diff --git a/util/opt/tes.c b/util/opt/tes.c
index 5a53151d2..355042a51 100644
--- a/util/opt/tes.c
+++ b/util/opt/tes.c
@@ -28,8 +28,6 @@ extern char flow_tab[];
 #define ISABRANCH(i)		(flow_tab[i]&HASLABEL)
 #define ISCONDBRANCH(i)		(flow_tab[i]&CONDBRA)
 
-lblst_p est_list = NULL;
-
 #define INSTR(lnp)      (lnp->l_instr & BMASK)
 #define TYPE(lnp)       lnp->l_optyp
 #define PREV(lnp)       lnp->l_prev
@@ -46,7 +44,6 @@ init_state()
 {
 	stacktop = 0;
 	state = KNOWN;
-	est_list = NULL;
 }
 
 tes_pseudos()
@@ -161,37 +158,17 @@ line_p lnp;
 	}
 }
 
-delete_labels()
-{
-	register lblst_p tmp;
-
-	while ((tmp = est_list) != NULL) {
-	    est_list = est_list->ll_next;
-	    oldlblst(tmp);
-	}
-}
-
 assign_label(label)
-num_p label;
+register num_p label;
 {
-	register lblst_p lst_elt;
-
 	if (label->n_flags & NUMSET) {
-		lst_elt = label->n_lst_elt;
-		if (state == NOTREACHED || stacktop > lst_elt->ll_size) {
-			stacktop = lst_elt->ll_size;
-		} else if ( stacktop < lst_elt->ll_size) {
-			lst_elt->ll_size = stacktop;
+		if (state == NOTREACHED || stacktop > label->n_size) {
+			stacktop = label->n_size;
+		} else if ( stacktop < label->n_size) {
+			label->n_size = stacktop;
 		}
 	} else {
-		lst_elt = newlblst();
-		lst_elt->ll_next = est_list;
-		lst_elt->ll_num = label;
-		lst_elt->ll_size = stacktop;
-
-		est_list = lst_elt;
-
-		label->n_lst_elt = lst_elt;
+		label->n_size = stacktop;
 		label->n_flags |= NUMSET;
 	}
 }
@@ -206,9 +183,8 @@ line_p lnp;
 
 	if (instr == op_lab) {
 		if (state == NOTREACHED)  {
-			label->n_lst_elt->ll_fallthrough = FALSE;
 		} else {
-			label->n_lst_elt->ll_fallthrough = TRUE;
+			label->n_flags |= NUMFALLTHROUGH;
 		}
 	} else if (ISCONDBRANCH(instr)) {	/* conditional branch */
 		label->n_flags |= NUMCOND;
diff --git a/util/opt/tes.h b/util/opt/tes.h
index c96b2795c..9523b6b65 100644
--- a/util/opt/tes.h
+++ b/util/opt/tes.h
@@ -3,18 +3,6 @@
  */
 /* $Header$ */
 
-typedef struct label_list *lblst_p;
-
-struct label_list {
-    lblst_p	ll_next;	/* pointer to next label in the list */
-    num_p	ll_num;		/* pointer to label definition */
-    short	ll_size;	/* size of the element on top at this label */
-    char	ll_fallthrough;	/* is the label reached by fallthrough ? */
-};
-
-typedef struct label_list lblst_t;
-
-extern lblst_p est_list;
 extern int state;
 #define	KNOWN		1
 #define	NOTREACHED	2
-- 
2.34.1