code review 4811041: runtime: tweak select performance

src/cmd/gc/go.h

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include        <u.h>
 #include        <libc.h>
 #include        <bio.h>
 
 #undef OAPPEND
 
@@ skipping 1119 matching lines @@
 Node*   nodnil(void);
 int     parserline(void);
 Sym*    pkglookup(char *name, Pkg *pkg);
 int     powtwo(Node *n);
 Type*   ptrto(Type *t);
 void*   remal(void *p, int32 on, int32 n);
 Sym*    restrictlookup(char *name, Pkg *pkg);
 Node*   safeexpr(Node *n, NodeList **init);
 void    saveerrors(void);
 Node*   cheapexpr(Node *n, NodeList **init);
+Node*   localexpr(Node *n, NodeList **init);
 int32   setlineno(Node *n);
 void    setmaxarg(Type *t);
 Type*   shallow(Type *t);
 int     simsimtype(Type *t);
 void    smagic(Magic *m);
 Type*   sortinter(Type *t);
 uint32  stringhash(char *p);
 Strlit* strlit(char *s);
 int     structcount(Type *t);
 Type*   structfirst(Iter *s, Type **nn);
@@ skipping 106 matching lines @@
 Node*   nodarg(Type*, int);
 void    nopout(Prog*);
 void    patch(Prog*, Prog*);
 Prog*   unpatch(Prog*);
 void    zfile(Biobuf *b, char *p, int n);
 void    zhist(Biobuf *b, int line, vlong offset);
 void    zname(Biobuf *b, Sym *s, int t);
 void    data(void);
 void    text(void);