code review 6489067: cmd/8g: import componentgen from 6g.

src/cmd/8g/cgen.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.
 
 // TODO(rsc):
 //      assume CLD?
 
 #include <u.h>
 #include <libc.h>
 #include "gg.h"
@@ skipping 757 matching lines @@
 igen(Node *n, Node *a, Node *res)
 {
         Node n1;
         Type *fp;
         Iter flist;
 ··
         switch(n->op) {
         case ONAME:
                 if((n->class&PHEAP) || n->class == PPARAMREF)
                         break;
-                *a = *n;
-                return;
-
-        case OINDREG:
                 *a = *n;
                 return;
 
         case OCALLFUNC:
                 fp = structfirst(&flist, getoutarg(n->left->type));
                 cgen_call(n, 0);
                 memset(a, 0, sizeof *a);
                 a->op = OINDREG;
                 a->val.u.reg = D_SP;
                 a->addable = 1;
@@ skipping 649 matching lines @@
                 regfree(&nodl);
         return 0;
 
 yes:
         if(freer)
                 regfree(&nodr);
         if(freel)
                 regfree(&nodl);
         return 1;
 }