6g tweaks

	* byteastring is no longer used
	* do not generate ODCL, OAS for globals
	  (wasn't generating any code but might
	  save one or two init functions)
	* do not call self from Init function

R=ken
OCL=28309
CL=28309

src/cmd/gc/builtin.c.boot

@@ -18,7 +18,6 @@ char *sysimport =
 	"func sys.slicestring (? string, ? int, ? int) (? string)\n"
 	"func sys.indexstring (? string, ? int) (? uint8)\n"
 	"func sys.intstring (? int64) (? string)\n"
-	"func sys.byteastring (? *uint8, ? int) (? string)\n"
 	"func sys.arraystring (? []uint8) (? string)\n"
 	"func sys.stringiter (? string, ? int) (? int)\n"
 	"func sys.stringiter2 (? string, ? int) (retk int, retv int)\n"

src/cmd/gc/dcl.c

@@ -38,6 +38,7 @@ dodclvar(Node *n, Type *t)
 
 	addvar(n, t, dclcontext);
 	autoexport(n->sym);
+	if(funcdepth > 0)
 		addtop = list(addtop, nod(ODCL, n, N));
 }
 
@@ -1299,7 +1300,7 @@ fninit(Node *n)
 	Node *done;
 	Node *a, *fn, *r;
 	uint32 h;
-	Sym *s;
+	Sym *s, *initsym;
 
 	if(strcmp(package, "PACKAGE") == 0) {
 		// sys.go or unsafe.go during compiler build
@@ -1329,7 +1330,8 @@ fninit(Node *n)
 		snprint(namebuf, sizeof(namebuf), "init");
 
 	fn = nod(ODCLFUNC, N, N);
-	fn->nname = newname(lookup(namebuf));
+	initsym = lookup(namebuf);
+	fn->nname = newname(initsym);
 	fn->type = functype(N, N, N);
 	funchdr(fn);
 
@@ -1350,6 +1352,8 @@ fninit(Node *n)
 			continue;
 		if(s->oname == N)
 			continue;
+		if(s == initsym)
+			continue;
 
 		// could check that it is fn of no args/returns
 		a = nod(OCALL, s->oname, N);

src/cmd/gc/go.y

@@ -299,9 +299,13 @@ Avardcl:
 		$$ = rev($1);
 		dodclvar($$, $2);
 
+		if(funcdepth == 0) {
+			$$ = N;
+		} else {
 			$$ = nod(OAS, $$, N);
 			addtotop($$);
 		}
+	}
 
 Bvardcl:
 	new_name_list_r Btype
@@ -309,9 +313,13 @@ Bvardcl:
 		$$ = rev($1);
 		dodclvar($$, $2);
 
+		if(funcdepth == 0) {
+			$$ = N;
+		} else {
 			$$ = nod(OAS, $$, N);
 			addtotop($$);
 		}
+	}
 |	new_name_list_r type '=' expr_list
 	{
 		if(addtop != N)

src/cmd/gc/sys.go

@@ -27,7 +27,6 @@ func	cmpstring(string, string) int;
 func	slicestring(string, int, int) string;
 func	indexstring(string, int) byte;
 func	intstring(int64) string;
-func	byteastring(*byte, int) string;
 func	arraystring([]byte) string;
 func	stringiter(string, int) int;
 func	stringiter2(string, int) (retk int, retv int);

src/runtime/string.c

@@ -173,14 +173,6 @@ sys·intstring(int64 v, String s)
 	FLUSH(&s);
 }
 
-void
-sys·byteastring(byte *a, int32 l, String s)
-{
-	s = gostringsize(l);
-	mcpy(s.str, a, l);
-	FLUSH(&s);
-}
-
 void
 sys·arraystring(Array b, String s)
 {