silence gcc warnings

R=ken
OCL=16449
CL=16466

src/cmd/6g/gen.c

@@ -117,8 +117,6 @@ void
 allocparams(void)
 {
 	Dcl *d;
-	Iter list;
-	Type *t;
 	Node *n;
 	uint32 w;
 
@@ -153,7 +151,6 @@ gen(Node *n, Label *labloop)
 	int32 lno;
 	Prog *scontin, *sbreak;
 	Prog *p1, *p2, *p3;
-	Sym *s;
 	Node *l;
 	Label *lab;
 
@@ -723,7 +720,7 @@ void
 cgen_call(Node *n, int proc)
 {
 	Type *t;
-	Node nod, afun, regax;
+	Node nod, afun;
 
 	if(n == N)
 		return;
@@ -823,7 +820,7 @@ cgen_callret(Node *n, Node *res)
 void
 cgen_aret(Node *n, Node *res)
 {
-	Node nod1, nod2;
+	Node nod1;
 	Type *fp, *t;
 	Iter flist;
 
@@ -858,7 +855,6 @@ cgen_asop(Node *n)
 {
 	Node n1, n2, n3, n4;
 	Node *nl, *nr;
-	int32 lno;
 
 	nl = n->left;
 	nr = n->right;
@@ -1069,7 +1065,7 @@ void
 cgen_div(int op, Node *nl, Node *nr, Node *res)
 {
 	Node ax, dx, n3, tmpax, tmpdx;
-	int a, rax, rdx;
+	int rax, rdx;
 
 	rax = reg[D_AX];
 	rdx = reg[D_DX];

src/cmd/6g/gg.h

@@ -159,6 +159,7 @@ void	gmove(Node*, Node*);
 Prog*	gins(int, Node*, Node*);
 int	samaddr(Node*, Node*);
 void	naddr(Node*, Addr*);
+void	cgen_aret(Node*, Node*);
 
 /*
  * gsubr.c

src/cmd/6g/gsubr.c

@@ -836,7 +836,7 @@ nodconst(&nodc, types[TUINT64], 1);
 	if(a == AMOVQ ||
 	   a == AMOVSD ||
 	   a == AMOVSS ||
-	   a == AMOVL && f->type->width == t->type->width)	/* TO DO: check AMOVL */
+	   (a == AMOVL && f->type->width == t->type->width))	/* TO DO: check AMOVL */
 		if(samaddr(f, t))
 			return;
 	gins(a, f, t);

src/cmd/6g/list.c

@@ -316,9 +316,9 @@ Yconv(Fmt *fp)
 	p = str;
 	for(i=0; i<sconsize; i++) {
 		c = a[i] & 0xff;
-		if(c >= 'a' && c <= 'z' ||
-		   c >= 'A' && c <= 'Z' ||
-		   c >= '0' && c <= '9') {
+		if((c >= 'a' && c <= 'z') ||
+		   (c >= 'A' && c <= 'Z') ||
+		   (c >= '0' && c <= '9')) {
 			*p++ = c;
 			continue;
 		}

src/cmd/6g/obj.c

@@ -163,6 +163,7 @@ dumpobj(void)
 	Bterm(bout);
 }
 
+void
 Bputdot(Biobuf *b)
 {
 	// put out middle dot ·

src/cmd/gc/const.c

@@ -9,7 +9,6 @@ void
 convlit(Node *n, Type *t)
 {
 	int et;
-	Node *n1;
 
 	if(n == N || t == T)
 		return;

src/cmd/gc/dcl.c

@@ -640,8 +640,6 @@ addvar(Node *n, Type *t, int ctxt)
 {
 	Dcl *r, *d;
 	Sym *s;
-	Type *ot;
-	Node *on;
 	int gen;
 
 	if(n==N || n->sym == S || n->op != ONAME || t == T)
@@ -965,9 +963,8 @@ mixed:
 void
 fninit(Node *n)
 {
-	Node *done, *any;
+	Node *done;
 	Node *a, *fn, *r;
-	Iter iter;
 	uint32 h;
 	Sym *s;
 

src/cmd/gc/go.h

@@ -591,6 +591,8 @@ Type*	ptrto(Type*);
 Node*	cleanidlist(Node*);
 Node*	syslook(char*, int);
 Node*	treecopy(Node*);
+int	isselect(Node*);
+void	tempname(Node*, Type*);
 
 Type**	getthis(Type*);
 Type**	getoutarg(Type*);

src/cmd/gc/lex.c

@@ -200,7 +200,6 @@ importfile(Val *f)
 	Biobuf *imp;
 	char *file;
 	int32 c;
-	char *p;
 	int len;
 
 	if(f->ctype != CTSTR) {

src/cmd/gc/mparith2.c

@@ -484,7 +484,7 @@ mpmovecfix(Mpint *a, vlong c)
 void
 mpdivmodfixfix(Mpint *q, Mpint *r, Mpint *n, Mpint *d)
 {
-	int i, nn, dn;
+	int i;
 
 	mpmovefixfix(r, n);
 	mpmovecfix(q, 0);

src/cmd/gc/subr.c

@@ -780,7 +780,6 @@ Lconv(Fmt *fp)
 	if(n == 0)
 		strcat(str, "<epoch>");
 
-ret:
 	return fmtstrcpy(fp, str);
 }
 
@@ -1458,8 +1457,6 @@ signame(Type *t)
 {
 	Sym *s, *ss;
 	char *e;
-	Type *t1;
-	int n;
 	char buf[NSYMB];
 
 	if(t == T)