code review 6494107: cmd/6g, cmd/8g: add OINDREG, ODOT, ODOTPTR cases to igen.

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        <bio.h>
 
 #undef OAPPEND
 
 // avoid <ctype.h>
 #undef isblank
@@ skipping 152 matching lines @@
         Type*   method;
         Type*   xmethod;
 
         Sym*    sym;
         int32   vargen;         // unique name for OTYPE/ONAME
 
         Node*   nname;
         vlong   argwid;
 
         // most nodes
-        Type*   type;
+        Type*   type;           // the element type, like Elem in reflect

[rsc, 2012/09/24 14:38:38]

// actual type for TFIELD, element type for TARRAY, TCHAN, TMAP, TPTRxx

[remyoudompheng, 2012/09/24 21:09:18]

Done.

         vlong   width;          // offset in TFIELD, width in all others
 
         // TFIELD
         Type*   down;           // also used in TMAP

[rsc, 2012/09/24 14:38:38]

// also key type in TMAP

[remyoudompheng, 2012/09/24 21:09:18]

Done.

         Strlit* note;           // literal string annotation
 
         // TARRAY
         int32   bound;          // negative is dynamic array
 
         int32   maplineno;      // first use of TFORW as map key
         int32   embedlineno;    // first use of TFORW as embedded type
 ········
         // for TFORW, where to copy the eventual value to
         NodeList        *copyto;
@@ skipping 1245 matching lines @@
 #pragma varargck        type    "P"     Prog*
 #pragma varargck        type    "Q"     Bits
 #pragma varargck        type    "R"     int
 #pragma varargck        type    "S"     Sym*
 #pragma varargck        type    "lS"    Sym*
 #pragma varargck        type    "T"     Type*
 #pragma varargck        type    "lT"    Type*
 #pragma varargck        type    "V"     Val*
 #pragma varargck        type    "Y"     char*
 #pragma varargck        type    "Z"     Strlit*