runtime: rename ptrsize to ptrdata

I forgot there is already a ptrSize constant.
Rename field to avoid some confusion.

Change-Id: I098fdcc8afc947d6c02c41c6e6de24624cc1c8ff
Reviewed-on: https://go-review.googlesource.com/9700Reviewed-by: Austin Clements <austin@google.com>

src/cmd/internal/gc/reflect.go

@@ -685,9 +685,9 @@ func haspointers(t *Type) bool {
 	return ret
 }
 
-// typeptrsize returns the length in bytes of the prefix of t
+// typeptrdata returns the length in bytes of the prefix of t
 // containing pointer data. Anything after this offset is scalar data.
-func typeptrsize(t *Type) uint64 {
+func typeptrdata(t *Type) uint64 {
 	if !haspointers(t) {
 		return 0
 	}
@@ -716,7 +716,7 @@ func typeptrsize(t *Type) uint64 {
 			return uint64(Widthptr)
 		}
 		// haspointers already eliminated t.Bound == 0.
-		return uint64(t.Bound-1)*uint64(t.Type.Width) + typeptrsize(t.Type)
+		return uint64(t.Bound-1)*uint64(t.Type.Width) + typeptrdata(t.Type)
 
 	case TSTRUCT:
 		// Find the last field that has pointers.
@@ -726,10 +726,10 @@ func typeptrsize(t *Type) uint64 {
 				lastPtrField = t1
 			}
 		}
-		return uint64(lastPtrField.Width) + typeptrsize(lastPtrField.Type)
+		return uint64(lastPtrField.Width) + typeptrdata(lastPtrField.Type)
 
 	default:
-		Fatal("typeptrsize: unexpected type, %v", t)
+		Fatal("typeptrdata: unexpected type, %v", t)
 		return 0
 	}
 }
@@ -794,7 +794,7 @@ func dcommontype(s *Sym, ot int, t *Type) int {
 	//		zero          unsafe.Pointer
 	//	}
 	ot = duintptr(s, ot, uint64(t.Width))
-	ot = duintptr(s, ot, typeptrsize(t))
+	ot = duintptr(s, ot, typeptrdata(t))
 
 	ot = duint32(s, ot, typehash(t))
 	ot = duint8(s, ot, 0) // unused

src/reflect/type.go

@@ -246,7 +246,7 @@ const (
 // so that code cannot convert from, say, *arrayType to *ptrType.
 type rtype struct {
 	size          uintptr
-	ptrsize       uintptr
+	ptrdata       uintptr
 	hash          uint32            // hash of type; avoids computation in hash tables
 	_             uint8             // unused/padding
 	align         uint8             // alignment of variable with this type
@@ -1826,14 +1826,14 @@ func bucketOf(ktyp, etyp *rtype) *rtype {
 	}
 	// overflow
 	gc.append(bitsPointer)
-	tptrsize := gc.size
+	ptrdata := gc.size
 	if runtime.GOARCH == "amd64p32" {
 		gc.append(bitsScalar)
 	}
 
 	b := new(rtype)
 	b.size = gc.size
-	b.ptrsize = tptrsize
+	b.ptrdata = ptrdata
 	b.kind = kind
 	b.gc[0], _ = gc.finalize()
 	s := "bucket(" + *ktyp.string + "," + *etyp.string + ")"
@@ -1920,8 +1920,8 @@ func ArrayOf(count int, elem Type) Type {
 		panic("reflect.ArrayOf: array size would exceed virtual address space")
 	}
 	array.size = typ.size * uintptr(count)
-	if count > 0 && typ.ptrsize != 0 {
-		array.ptrsize = typ.size*uintptr(count-1) + typ.ptrsize
+	if count > 0 && typ.ptrdata != 0 {
+		array.ptrdata = typ.size*uintptr(count-1) + typ.ptrdata
 	}
 	array.align = typ.align
 	array.fieldAlign = typ.fieldAlign
@@ -2090,7 +2090,7 @@ func funcLayout(t *rtype, rcvr *rtype) (frametype *rtype, argSize, retOffset uin
 	// build dummy rtype holding gc program
 	x := new(rtype)
 	x.size = gc.size
-	x.ptrsize = gc.size // over-approximation
+	x.ptrdata = gc.size // over-approximation
 	var hasPtr bool
 	x.gc[0], hasPtr = gc.finalize()
 	if !hasPtr {

src/runtime/type.go

@@ -13,7 +13,7 @@ import "unsafe"
 // ../reflect/type.go:/^type.rtype.
 type _type struct {
 	size       uintptr
-	ptrsize    uintptr // Bytes of prefix containing pointer slots.
+	ptrdata    uintptr // size of memory prefix holding all pointers
 	hash       uint32
 	_unused    uint8
 	align      uint8