From f4a513a98e6341b2d4796752644a27c722612847 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Thu, 29 Oct 2015 18:14:50 +0000
Subject: compiler, reflect, runtime: remove zero field from type descriptor

    Type descriptors picked up a zero field because the gc map
    implementation used it.  However, it's since been dropped by the gc
    library.  It was never used by gccgo.  Drop it now in preparation for
    upgrading to the Go 1.5 library.

    Reviewed-on: https://go-review.googlesource.com/16486

From-SVN: r229546
---
 libgo/go/reflect/type.go | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'libgo/go')

diff --git a/libgo/go/reflect/type.go b/libgo/go/reflect/type.go
index 61b1955..5cdfba5 100644
--- a/libgo/go/reflect/type.go
+++ b/libgo/go/reflect/type.go
@@ -262,7 +262,6 @@ type rtype struct {
 	string        *string        // string form; unnecessary  but undeniably useful
 	*uncommonType                // (relatively) uncommon fields
 	ptrToThis     *rtype         // type for pointer to this type, if used in binary or has methods
-	zero          unsafe.Pointer // pointer to zero value
 }
 
 // Method on non-interface type
@@ -1129,7 +1128,6 @@ func (t *rtype) ptrTo() *rtype {
 
 	p.uncommonType = nil
 	p.ptrToThis = nil
-	p.zero = unsafe.Pointer(&make([]byte, p.size)[0])
 	p.elem = t
 
 	if t.kind&kindNoPointers != 0 {
@@ -1505,7 +1503,6 @@ func ChanOf(dir ChanDir, t Type) Type {
 	ch.elem = typ
 	ch.uncommonType = nil
 	ch.ptrToThis = nil
-	ch.zero = unsafe.Pointer(&make([]byte, ch.size)[0])
 
 	ch.gc = unsafe.Pointer(&chanGC{
 		width: ch.size,
@@ -1561,7 +1558,6 @@ func MapOf(key, elem Type) Type {
 	mt.elem = etyp
 	mt.uncommonType = nil
 	mt.ptrToThis = nil
-	mt.zero = unsafe.Pointer(&make([]byte, mt.size)[0])
 	// mt.gc = unsafe.Pointer(&ptrGC{
 	// 	width:  unsafe.Sizeof(uintptr(0)),
 	// 	op:     _GC_PTR,
@@ -1848,7 +1844,6 @@ func SliceOf(t Type) Type {
 	slice.elem = typ
 	slice.uncommonType = nil
 	slice.ptrToThis = nil
-	slice.zero = unsafe.Pointer(&make([]byte, slice.size)[0])
 
 	if typ.size == 0 {
 		slice.gc = unsafe.Pointer(&sliceEmptyGCProg)
@@ -1920,7 +1915,6 @@ func arrayOf(count int, elem Type) Type {
 	// TODO:
 	array.uncommonType = nil
 	array.ptrToThis = nil
-	array.zero = unsafe.Pointer(&make([]byte, array.size)[0])
 	array.len = uintptr(count)
 	array.slice = slice.(*rtype)
 
-- 
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