gc: cut some dead code, fix 6g -S output

R=ken2
CC=golang-dev
https://golang.org/cl/193079

src/cmd/gc/export.c

@@ -384,54 +384,3 @@ importmethod(Sym *s, Type *t)
 	addmethod(s, t, 0);
 }
 
-/*
- * ******* import *******
- */
-
-void
-checkimports(void)
-{
-	Sym *s;
-	Type *t, *t1;
-	uint32 h;
-	int et;
-
-return;
-
-	for(h=0; h<NHASH; h++)
-	for(s = hash[h]; s != S; s = s->link) {
-		if(s->def == N || s->def->op != OTYPE)
-			continue;
-		t = s->def->type;
-		if(t == T)
-			continue;
-
-		et = t->etype;
-		switch(t->etype) {
-		case TFORW:
-			print("ci-1: %S %lT\n", s, t);
-			break;
-
-		case TPTR32:
-		case TPTR64:
-			if(t->type == T) {
-				print("ci-2: %S %lT\n", s, t);
-				break;
-			}
-
-			t1 = t->type;
-			if(t1 == T) {
-				print("ci-3: %S %lT\n", s, t1);
-				break;
-			}
-
-			et = t1->etype;
-			if(et == TFORW) {
-				print("%L: ci-4: %S %lT\n", lineno, s, t);
-				break;
-			}
-			break;
-		}
-	}
-}
-

src/cmd/gc/go.h

@@ -1025,7 +1025,6 @@ void	importconst(Sym *s, Type *t, Node *v);
 void	importmethod(Sym *s, Type *t);
 void	importtype(Type *s, Type *t);
 void	importvar(Sym *s, Type *t, int ctxt);
-void	checkimports(void);
 Type*	pkgtype(Sym*);
 Sym*	importsym(Sym*, int);
 

src/cmd/gc/go.y

@@ -253,7 +253,6 @@ import_there:
 	hidden_import_list '$' '$'
 	{
 		resumecheckwidth();
-		checkimports();
 		unimportfile();
 	}
 

src/cmd/gc/lex.c

@@ -27,12 +27,22 @@ main(int argc, char *argv[])
 	localpkg->prefix = "\"\"";
 
 	builtinpkg = mkpkg(strlit("go.builtin"));
+
 	gostringpkg = mkpkg(strlit("go.string"));
-	gostringpkg->prefix = "go.string";
+	gostringpkg->name = "go.string";
+	gostringpkg->prefix = "go.string";	// not go%2estring
+
 	runtimepkg = mkpkg(strlit("runtime"));
+	runtimepkg->name = "runtime";
+
 	stringpkg = mkpkg(strlit("string"));
+	stringpkg->name = "string";
+
 	typepkg = mkpkg(strlit("type"));
+	typepkg->name = "type";
+
 	unsafepkg = mkpkg(strlit("unsafe"));
+	unsafepkg->name = "unsafe";
 
 	goroot = getgoroot();
 	goos = getgoos();