code review 4634073: gc: Escape analysis.

src/cmd/gc/dcl.c

 // 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        "go.h"
 #include        "y.tab.h"
 
 static  void    funcargs(Node*);
 
 static int
@@ skipping 802 matching lines @@
                         }
                         continue;
                 }
 
                 f = typ(TFIELD);
                 f->type = n->type;
                 f->note = note;
                 f->width = BADWIDTH;
                 f->isddd = n->isddd;
 
+                // esc.c needs to find f given a PPARAM to add the tag.
+                if(funarg && n->left && n->left->class == PPARAM)
+                        n->left->paramfld = f;
+
                 if(left != N && left->op == ONAME) {
                         f->nname = left;
                         f->embedded = n->embedded;
                         f->sym = f->nname->sym;
                         if(importpkg && !exportname(f->sym->name))
                                 f->sym = pkglookup(f->sym->name, structpkg);
                         if(f->sym && !isblank(f->nname)) {
                                 for(t1=*t0; t1!=T; t1=t1->down) {
                                         if(t1->sym == f->sym) {
                                                 yyerror("duplicate %s %s", what, t1->sym->name);
@@ skipping 412 matching lines @@
         dclcontext = PAUTO;
         funcdepth = n->funcdepth + 1;
         compile(n);
         curfn = nil;
         funcdepth = 0;
         dclcontext = PEXTERN;
 }