code review 5487077: gc: inlining, allow empty bodies, fix _ arguments.

src/cmd/gc/fmt.c

 // Copyright 2011 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        "go.h"
 #include        "opnames.h"
 
 //
@@ skipping 896 matching lines @@
         case OCONTINUE:
         case OGOTO:
         case OFALL:
         case OXFALL:
                 if(n->left)
                         fmtprint(f, "%#O %N", n->op, n->left);
                 else
                         fmtprint(f, "%#O", n->op);
                 break;
 
+        case OEMPTY:
+                break;
+
         case OLABEL:
                 fmtprint(f, "%N: ", n->left);
                 break;
 ··········
         }
 
         if(extrablock)
                 fmtstrcpy(f, "}");
 
         return 0;
@@ skipping 84 matching lines @@
         [OAS2FUNC] = -1,
         [OAS2MAPR] = -1,
         [OAS2RECV] = -1,
         [OASOP] = -1,
         [OBREAK] = -1,
         [OCASE] = -1,
         [OCONTINUE] = -1,
         [ODCL] = -1,
         [ODCLFIELD] = -1,
         [ODEFER] = -1,
+        [OEMPTY] = -1,
         [OFALL] = -1,
         [OFOR] = -1,
         [OIF] = -1,
         [OLABEL] = -1,
         [OPROC] = -1,
         [ORANGE] = -1,
         [ORETURN] = -1,
         [OSELECT] = -1,
         [OSWITCH] = -1,
         [OXCASE] = -1,
@@ skipping 534 matching lines @@
 dumplist(char *s, NodeList *l)
 {
         print("%s\n%+H\n", s, l);
 }
 
 void
 dump(char *s, Node *n)
 {
         print("%s [%p]\n%+N\n", s, n, n);
 }