Remove dead stores. (#240)

src/car-cdr.c

@@ -471,12 +471,11 @@ ConsCell *find_close_prior_cell(struct conspage *page, LispPTR oldcell) {
   unsigned oldoffset = oldcell & 0xFF;
   unsigned offset = page->next_cell;
   unsigned prior = 0;
-  unsigned noffset, poffset;
+  unsigned noffset;
   ConsCell *cell;
 
   while (offset) {
     if ((offset < oldoffset) && (offset >= (oldoffset - 14))) {
-      poffset = offset;
       noffset = FREECONS(page, offset)->next_free;
       while ((noffset > offset) && (noffset < oldoffset)) {
         prior = offset;

src/conspage.c

@@ -193,11 +193,11 @@ ex:
 
 static ConsCell *find_pair_in_page(struct conspage *pg, LispPTR cdrval) {
   ConsCell *carcell, *cdrcell;
-  unsigned int offset, prior, priorprior, ppriorprior, noffset, nprior, poffset;
+  unsigned int offset, prior, priorprior, noffset, nprior, poffset;
 
   if (pg->count < 2) return ((ConsCell *)0);
 
-  ppriorprior = priorprior = prior = nprior = 0;
+  priorprior = prior = nprior = 0;
 
   for (offset = pg->next_cell; offset; offset = FREECONS(pg, offset)->next_free) {
     if (prior) {
@@ -243,7 +243,6 @@ static ConsCell *find_pair_in_page(struct conspage *pg, LispPTR cdrval) {
         return (carcell);
       }
     }
-    ppriorprior = priorprior;
     priorprior = prior;
     prior = offset;
   }

src/dbgtool.c

@@ -315,7 +315,6 @@ int sf(struct frameex1 *fx_addr68k) {
   ptr = Addr68k_from_LADDR(STK_OFFSET + bf->ivar);
   i = 0;
   while (ptr != (DLword *)bf) {
-    ptrhi = ptr;
     ptrlo = ptr + 1;
     printf(" %6x : 0x%4x  0x%4x  ", LADDR_from_68k(ptr), GETWORD(ptr), GETWORD(ptrlo));
     ivarindex = get_ivar_name(fx_addr68k, i++, &localivar);

src/fvar.c

@@ -79,7 +79,6 @@ void nnewframe(register struct frameex1 *newpfra2, register DLword *achain, regi
   register UNSIGNED i;        /* temp for control */
   register int nametablesize; /* NameTable size of current function header. */
   register int ph;            /* alink temp, also phase */
-  struct frameex1 *onewpfra2, *oonewpfra2, *ooonewpfra2;
 
 newframe:
 #ifdef SUN3_OS3_OR_OS4_IL
@@ -123,9 +122,6 @@ newframe:
   }
 
   ph &= 0xFFFE; /* to mask off SLOW bit */
-  ooonewpfra2 = oonewpfra2;
-  oonewpfra2 = onewpfra2;
-  onewpfra2 = newpfra2;
   newpfra2 = (struct frameex1 *)(-FRAMESIZE + Stackspace + ph);
 
   {                                  /* open new block to try and conserve address register */
@@ -433,7 +429,6 @@ LispPTR native_newframe(int slot)
   register DLword *achain;            /* pointer to 1st word of the searching
                                        FVAR slot in CurrentFrameExtension */
   register int name;                  /* Atom# of target FVAR slot. */
-  struct frameex2 *onewpfra2, *oonewpfra2, *ooonewpfra2;
 
   { /* LOCAL temp regs */
     register int rslot = slot;
@@ -470,9 +465,6 @@ LispPTR native_newframe(int slot)
                               name, VALS_HI_RET(name)); */
       return (*((LispPTR *)achain) = VALS_HI_RET(name));
     }
-    ooonewpfra2 = oonewpfra2;
-    oonewpfra2 = onewpfra2;
-    onewpfra2 = newpfra2;
     newpfra2 = (struct frameex2 *)(-FRAMESIZE + Stackspace + (alink & 0xFFFE));
 
     {                                  /* open new block to try and conserve address register */

src/gcfinal.c

@@ -516,7 +516,6 @@ LispPTR reclaimstackp(LispPTR ptr) /* This is the entry function */
 
 void printarrayblock(LispPTR base) {
   struct arrayblock *bbase, *btrailer, *ptrailer;
-  struct arrayblock *bfwd, *bbwd;
   LispPTR *addr;
 
   LispPTR pbase, nbase;
@@ -524,8 +523,6 @@ void printarrayblock(LispPTR base) {
   bbase = (struct arrayblock *)Addr68k_from_LADDR(base);
   btrailer = (struct arrayblock *)Addr68k_from_LADDR(Trailer(base, bbase));
   ptrailer = (struct arrayblock *)Addr68k_from_LADDR(base - ARRAYBLOCKTRAILERWORDS);
-  bfwd = (struct arrayblock *)Addr68k_from_LADDR(bbase->fwd);
-  bbwd = (struct arrayblock *)Addr68k_from_LADDR(bbase->bkwd);
 
   nbase = base + 2 * bbase->arlen;
   pbase = base - 2 * ptrailer->arlen;

src/gcmain3.c

@@ -300,25 +300,23 @@ returNIL:	\n\
 LispPTR gcmapscan(void) {
   register GCENTRY probe;
   register GCENTRY *entry;
-  GCENTRY offset, dbgentry, dbgcontents;
+  GCENTRY offset, dbgcontents;
   register LispPTR ptr;
 
   probe = HTMAIN_ENTRY_COUNT;
 nextentry:
   while ((probe = gcscan1(probe)) != NIL) {
     entry = (GCENTRY *)HTmain + probe;
-    dbgentry = GETGC(entry);
   retry:
     if (HENTRY->collision) {
       register GCENTRY *prev;
       register GCENTRY *link;
-      LispPTR content, dbgfree;
+      LispPTR content;
 
       prev = (GCENTRY *)0;
       link = (GCENTRY *)HTcoll + GetLinkptr((content = HTLPTR->contents));
     linkloop:
       offset = ((struct htcoll *)link)->free_ptr;
-      dbgfree = ((struct htcoll *)link)->next_free;
       if (StkCntIsZero(offset)) {
         /* Reclaimable object */
         ptr = VAG2(GetSegnuminColl(offset), (probe << 1));
@@ -417,7 +415,6 @@ LispPTR gcscanstack(void) {
           register struct frameex1 *frameex;
           register struct fnhead *fnheader;
           frameex = (struct frameex1 *)basicframe;
-          scanptr = LADDR_from_68k(frameex);
           {
             register LispPTR fn_head;
 #ifdef BIGVM

src/ldsout.c

@@ -79,13 +79,10 @@ int sysout_loader(const char * sysout_file_name, int sys_size)
   struct stat stat_buf; /* file stat buf */
   int i, vp;
 
-  int machinetype;
   char errmsg[255];
 
   int j = 0;
 
-  machinetype = 0;
-
   /* Checks for specifying the process size (phase I) */
   /* If sys_size == 0 figure out the proper size later */
   if ((sys_size != 0) && (sys_size < DEFAULT_PRIME_SYSOUTSIZE)) {
@@ -222,8 +219,6 @@ int sysout_loader(const char * sysout_file_name, int sys_size)
     exit(1);
   }
 
-  machinetype = ifpage.machinetype;
-
   if ((stat_buf.st_size & (BYTESPER_PAGE - 1)) != 0)
     printf("CAUTION::not an integral number of pages.  sysout & 0x1ff = 0x%x\n",
 	   (int)(stat_buf.st_size & (BYTESPER_PAGE - 1)));

src/llstk.c

@@ -296,8 +296,6 @@ DLword *freestackblock(DLword n, StackWord *start68k, int align)
 {
   register int wantedsize;
   register StackWord *scanptr68k;
-  StackWord *ooscan, *oscan;
-  register StackWord *orig68k;
   register STKBLK *freeptr68k;
   register StackWord *easp68k;
   register DLword freesize;
@@ -338,8 +336,9 @@ SCAN:
       scanptr68k = (StackWord *)Addr68k_from_StkOffset(((FX *)scanptr68k)->nextblock);
       break;
     default:
-      orig68k = scanptr68k;
-
+#ifdef STACKCHECK
+      StackWord *orig68k = scanptr68k;
+#endif
       while (STKWORD(scanptr68k)->flags != STK_BF) {
         S_WARN(STKWORD(scanptr68k)->flags == STK_NOTFLG, "NOTFLG not on", scanptr68k);
         scanptr68k = (StackWord *)(((DLword *)scanptr68k) + DLWORDSPER_CELL);
@@ -382,8 +381,6 @@ FREESCAN:
   freeptr68k = (STKBLK *)scanptr68k;
   freesize = FSB_size(freeptr68k);
 FREE:
-  ooscan = oscan;
-  oscan = scanptr68k;
   scanptr68k = (StackWord *)(((DLword *)freeptr68k) + freesize);
   if (freesize == 0) error("FREESIZE = 0");
 

src/mvs.c

@@ -271,10 +271,7 @@ LispPTR make_value_list(int argcount, LispPTR *argarray) {
 
 void simulate_unbind(FX2 *frame, int unbind_count, FX2 *returner) {
   int unbind;
-  LispPTR *stackptr;
-  DLword *nextblock;
-  stackptr = (LispPTR *)(Stackspace + frame->nextblock);
-  nextblock = (DLword *)stackptr;
+  LispPTR *stackptr = (LispPTR *)(Stackspace + frame->nextblock);
   for (unbind = 0; unbind < unbind_count; unbind++) {
     register int value;
     register LispPTR *lastpvar;

src/rpc.c

@@ -65,7 +65,7 @@ LispPTR rpc(LispPTR *args)
   register int s, msec_until_timeout, msec_between_tries, out_length;
   register int received;
   register int port;
-  int dontblock, dest;
+  int dest;
   unsigned fromlen;
   fd_set read_descriptors;
   struct timeval pertry_timeout, total_timeout, time_waited;
@@ -111,8 +111,6 @@ LispPTR rpc(LispPTR *args)
   /* Open the socket; Might want to make this non-blocking */
   if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) goto handle_error;
 
-  dontblock = 1;
-
   /* The sockets that rpc controls don't block */
   fcntl(s, F_SETFL, fcntl(s, F_GETFL, 0) | O_NONBLOCK);
 

src/rplcons.c

@@ -41,18 +41,17 @@ LispPTR N_OP_rplcons(register LispPTR list, register LispPTR item) {
 #ifndef NEWCDRCODING
   register struct conspage *conspage;
   register ConsCell *new_cell;
-#endif
   register ConsCell *list68k;
-
   LispPTR register page;
+#endif
 
   if (!Listp(list)) ERROR_EXIT(item);
 
+/* There are some rest Cell and "list" must be ONPAGE cdr_coded */
+#ifndef NEWCDRCODING
   page = POINTER_PAGE(list);
   list68k = (ConsCell *)Addr68k_from_LADDR(list);
 
-/* There are some rest Cell and "list" must be ONPAGE cdr_coded */
-#ifndef NEWCDRCODING
   if ((GetCONSCount(page) != 0) && (list68k->cdr_code > CDR_MAXINDIRECT)) {
     GCLOOKUP(item, ADDREF);
     GCLOOKUP(cdr(list), DELREF);

src/testtool.c

@@ -1148,7 +1148,7 @@ void all_stack_dump(DLword start, DLword end, DLword silent)
 {
   STKH *stkptr;
   DLword *start68k, *end68k, *orig68k;
-  DLword size, dummy;
+  DLword size;
   int sdlines = 0;
   extern IFPAGE *InterfacePage;
 
@@ -1165,7 +1165,6 @@ void all_stack_dump(DLword start, DLword end, DLword silent)
   stkptr = (STKH *)start68k;
 
   while (((DLword *)stkptr) < end68k) {
-    dummy = LADDR_from_68k(stkptr);
     switch (STKHPTR(stkptr)->flags1) {
       case STK_GUARD:
       case STK_FSB:

src/xcursor.c

@@ -197,7 +197,6 @@ void set_Xcursor(DspInterface dsp, const uint8_t *bitmap, int hotspot_x, int hot
   unsigned char image[32];
   int i;
   Pixmap Cursor_src, Cursor_msk;
-  Screen *screen;
 
 #ifdef BYTESWAP
   if (from_lisp)
@@ -209,7 +208,6 @@ void set_Xcursor(DspInterface dsp, const uint8_t *bitmap, int hotspot_x, int hot
 #endif /* BYTESWAP */
 
   XLOCK;
-  screen = ScreenOfDisplay(dsp->display_id, DefaultScreen(dsp->display_id));
   Cursor_src = XCreatePixmapFromBitmapData(dsp->display_id, dsp->DisplayWindow, (char *)image,
 					   16, 16, 1, 0, 1); /* Has to have a depth of 1! */
   Cursor_msk = XCreatePixmapFromBitmapData(dsp->display_id, dsp->DisplayWindow, (char *)image,