Merge branch 'ta/erts-unused-vars' into dev

* ta/erts-unused-vars:
  erts: Remove unused variables

OTP-9205

10 files changed, 3 insertions, 32 deletions

diff --git a/erts/emulator/beam/beam_bif_load.c b/erts/emulator/beam/beam_bif_load.c
index 6ae9736141..1ca405961f 100644
--- a/erts/emulator/beam/beam_bif_load.c
+++ b/erts/emulator/beam/beam_bif_load.c
@@ -472,9 +472,6 @@ check_process_code(Process* rp, Module* modp)
     for (oh = MSO(rp).first; oh; oh = oh->next) {
 	if (thing_subtag(oh->thing_word) == FUN_SUBTAG) {
 	    ErlFunThing* funp = (ErlFunThing*) oh;
-	    BeamInstr* fun_code;
-
-	    fun_code = funp->fe->address;
 
 	    if (INSIDE((BeamInstr *) funp->fe->address)) {
 		if (done_gc) {
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index c697b1ef31..57fe25453d 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -1411,7 +1411,6 @@ static int
 load_code(LoaderState* stp)
 {
     int i;
-    int tmp;
     int ci;
     int last_func_start = 0;
     char* sign;
@@ -1931,7 +1930,6 @@ load_code(LoaderState* stp)
 	    case 'P':		/* Byte offset into tuple or stack */
 	    case 'Q':		/* Like 'P', but packable */
 		VerifyTag(stp, tag, TAG_u);
-		tmp = tmp_op->a[arg].val;
 		code[ci++] = (BeamInstr) ((tmp_op->a[arg].val+1) * sizeof(Eterm));
 		break;
 	    case 'l':		/* Floating point register. */
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index f01580eb2b..6b1ce823cb 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -368,7 +368,6 @@ static int demonitor(Process *c_p, Eterm ref)
    ErtsMonitor *mon = NULL;  /* The monitor entry to delete */
    Process  *rp;    /* Local target process */
    Eterm     to = NIL;    /* Monitor link traget */
-   Eterm     ref_p; /* Pid of this end */
    DistEntry *dep = NULL;  /* Target's distribution entry */
    int deref_de = 0;
    int res;
@@ -381,7 +380,6 @@ static int demonitor(Process *c_p, Eterm ref)
        res = ERTS_DEMONITOR_BADARG;
        goto done; /* Cannot be this monitor's ref */
    }
-   ref_p = c_p->id;
 
    mon = erts_lookup_monitor(c_p->monitors, ref);
    if (!mon) {
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index 044fd045a6..05eddf4ae0 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -904,7 +904,6 @@ int erts_net_message(Port *prt,
     ErtsDistExternal ede;
     byte *t;
     Sint ctl_len;
-    int orig_ctl_len;
     Eterm arg;
     Eterm from, to;
     Eterm watcher, watched;
@@ -985,7 +984,6 @@ int erts_net_message(Port *prt,
 	PURIFY_MSG("data error");
 	goto data_error;
     }
-    orig_ctl_len = ctl_len;
 
     if (ctl_len > DIST_CTL_DEFAULT_SIZE) {
 	ctl = erts_alloc(ERTS_ALC_T_DCTRL_BUF, ctl_len * sizeof(Eterm));
diff --git a/erts/emulator/beam/erl_bits.c b/erts/emulator/beam/erl_bits.c
index 6f8a7436d5..0174e5fc43 100644
--- a/erts/emulator/beam/erl_bits.c
+++ b/erts/emulator/beam/erl_bits.c
@@ -177,7 +177,6 @@ erts_bs_get_integer_2(Process *p, Uint num_bits, unsigned flags, ErlBinMatchBuff
     byte* LSB;
     byte* MSB;
     Uint* hp;
-    Uint* hp_end;
     Uint words_needed;
     Uint actual;
     Uint v32;
@@ -405,7 +404,6 @@ erts_bs_get_integer_2(Process *p, Uint num_bits, unsigned flags, ErlBinMatchBuff
     default:
 	words_needed = 1+WSIZE(bytes);
 	hp = HeapOnlyAlloc(p, words_needed);
-	hp_end = hp + words_needed;
 	res = bytes_to_big(LSB, bytes, sgn, hp); 
 	if (is_small(res)) {
 	    p->htop = hp;
@@ -425,7 +423,6 @@ Eterm
 erts_bs_get_binary_2(Process *p, Uint num_bits, unsigned flags, ErlBinMatchBuffer* mb)
 {
     ErlSubBin* sb;
-    size_t num_bytes;		/* Number of bytes in binary. */
 
     if (mb->size - mb->offset < num_bits) {	/* Asked for too many bits.  */
 	return THE_NON_VALUE;
@@ -435,7 +432,6 @@ erts_bs_get_binary_2(Process *p, Uint num_bits, unsigned flags, ErlBinMatchBuffe
      * From now on, we can't fail.
      */
 
-    num_bytes = NBYTES(num_bits);
     sb = (ErlSubBin *) HeapOnlyAlloc(p, ERL_SUB_BIN_SIZE);
     
     sb->thing_word = HEADER_SUB_BIN;
@@ -1557,7 +1553,6 @@ Uint32
 erts_bs_get_unaligned_uint32(ErlBinMatchBuffer* mb)
 {
     Uint bytes;
-    Uint bits;
     Uint offs;
     byte bigbuf[4];
     byte* LSB;
@@ -1567,7 +1562,6 @@ erts_bs_get_unaligned_uint32(ErlBinMatchBuffer* mb)
     ASSERT(mb->size - mb->offset >= 32);
 
     bytes = 4;
-    bits = 8;
     offs = 0;
 
     LSB = bigbuf;
diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c
index d9150d86fe..c30d67ac88 100644
--- a/erts/emulator/beam/erl_gc.c
+++ b/erts/emulator/beam/erl_gc.c
@@ -455,7 +455,6 @@ erts_garbage_collect_hibernate(Process* p)
     Eterm* heap;
     Eterm* htop;
     Rootset rootset;
-    int n;
     char* src;
     Uint src_size;
     Uint actual_size;
@@ -486,7 +485,7 @@ erts_garbage_collect_hibernate(Process* p)
 				    sizeof(Eterm)*heap_size);
     htop = heap;
 
-    n = setup_rootset(p, p->arg_reg, p->arity, &rootset);
+    (void) setup_rootset(p, p->arg_reg, p->arity, &rootset);
 #if HIPE
     hipe_empty_nstack(p);
 #endif
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index f8997f3c07..21ee72edf2 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -1267,7 +1267,6 @@ ssi_flags_set_wake(ErtsSchedulerSleepInfo *ssi)
 static void
 wake_scheduler(ErtsRunQueue *rq, int incq, int one)
 {
-    int res;
     ErtsSchedulerSleepInfo *ssi;
     ErtsSchedulerSleepList *sl;
 
@@ -1298,7 +1297,6 @@ wake_scheduler(ErtsRunQueue *rq, int incq, int one)
 	if (ssi->next)
 	    ssi->next->prev = ssi->prev;
 
-	res = sl->list != NULL;
 	erts_smp_spin_unlock(&sl->lock);
 
 	ERTS_THR_MEMORY_BARRIER;
diff --git a/erts/emulator/beam/erl_unicode.c b/erts/emulator/beam/erl_unicode.c
index 545b345a71..dacf228e92 100644
--- a/erts/emulator/beam/erl_unicode.c
+++ b/erts/emulator/beam/erl_unicode.c
@@ -902,7 +902,6 @@ static BIF_RETTYPE build_utf8_return(Process *p,Eterm bin,int pos,
 static BIF_RETTYPE characters_to_utf8_trap(BIF_ALIST_3)
 {
     Eterm *real_bin;
-    Sint need;
     byte* bytes;
     Eterm rest_term;
     int left, sleft;
@@ -918,7 +917,6 @@ static BIF_RETTYPE characters_to_utf8_trap(BIF_ALIST_3)
     ASSERT(is_binary(BIF_ARG_1));
     real_bin = binary_val(BIF_ARG_1);
     ASSERT(*real_bin == HEADER_PROC_BIN);
-    need = ((ProcBin *) real_bin)->val->orig_size;
     pos = (int) binary_size(BIF_ARG_1);
     bytes = binary_bytes(BIF_ARG_1);
     sleft = left = allowed_iterations(BIF_P);
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index f21a96c754..2e884a350e 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -1226,7 +1226,6 @@ void init_io(void)
 {
     int i;
     ErlDrvEntry** dp;
-    ErlDrvEntry* drv;
     char maxports[21]; /* enough for any 64-bit integer */
     size_t maxportssize = sizeof(maxports);
     Uint ports_bits = ERTS_PORTS_BITS;
@@ -1309,10 +1308,8 @@ void init_io(void)
     init_driver(&fd_driver, &fd_driver_entry, NULL);
     init_driver(&vanilla_driver, &vanilla_driver_entry, NULL);
     init_driver(&spawn_driver, &spawn_driver_entry, NULL);
-    for (dp = driver_tab; *dp != NULL; dp++) {
-	drv = *dp;
+    for (dp = driver_tab; *dp != NULL; dp++)
 	erts_add_driver_entry(*dp, NULL, 1);
-    }
 
     erts_smp_tsd_set(driver_list_lock_status_key, NULL);
     erts_smp_mtx_unlock(&erts_driver_list_lock);
diff --git a/erts/etc/unix/to_erl.c b/erts/etc/unix/to_erl.c
index 886b301997..b7c3c956c6 100644
--- a/erts/etc/unix/to_erl.c
+++ b/erts/etc/unix/to_erl.c
@@ -125,7 +125,7 @@ static void usage(char *pname)
 int main(int argc, char **argv)
 {
     char  FIFO1[FILENAME_MAX], FIFO2[FILENAME_MAX];
-    int i, len, wfd, rfd, result = 0;
+    int i, len, wfd, rfd;
     fd_set readfds;
     char buf[BUFSIZ];
     char pipename[FILENAME_MAX];
@@ -367,7 +367,6 @@ int main(int argc, char **argv)
 	    }
 	    else {
 		fprintf(stderr, "Error in select.\n");
-		result = -1;
 		break;
 	    }
 	}
@@ -398,7 +397,6 @@ int main(int argc, char **argv)
 		close(wfd);
 		if (len < 0) {
 		    fprintf(stderr, "Error in reading from stdin.\n");
-		    result = -1;
 		} else {
 		    fprintf(stderr, "[EOF]\n\r");
 		}
@@ -420,7 +418,6 @@ int main(int argc, char **argv)
 		fprintf(stderr, "Error in writing to FIFO.\n");
 		close(rfd);
 		close(wfd);
-		result = -1;
 		break;
 	    }
 	    STATUS("\" OK\r\n");
@@ -447,7 +444,6 @@ int main(int argc, char **argv)
 		close(wfd);
 		if (len < 0) {
 		    fprintf(stderr, "Error in reading from FIFO.\n");
-		    result = -1;
 		} else
 		    fprintf(stderr, "[End]\n\r");
 		break;
@@ -456,7 +452,6 @@ int main(int argc, char **argv)
 		    if ((len=version_handshake(buf,len,wfd)) < 0) {
 			close(rfd);
 			close(wfd);
-			result = -1;
 			break;
 		    }
 		    if (protocol_ver >= 1) {
@@ -475,7 +470,6 @@ int main(int argc, char **argv)
 		    fprintf(stderr, "Error in writing to terminal.\n");
 		    close(rfd);
 		    close(wfd);
-		    result = -1;
 		    break;
 		}
 		STATUS("\" OK\r\n");