cmd/internal/obj: convert Symgrow to a method

Passes toolstash -cmp.

Change-Id: I77a415a4e5d8de7eb902fb0866aaf8783259485a
Reviewed-on: https://go-review.googlesource.com/20770Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/cmd/internal/obj/arm/asm5.go

@@ -737,7 +737,7 @@ func span5(ctxt *obj.Link, cursym *obj.LSym) {
 
 	p = cursym.Text
 	ctxt.Autosize = int32(p.To.Offset + 4)
-	obj.Symgrow(ctxt, cursym, cursym.Size)
+	cursym.Grow(cursym.Size)
 
 	bp := cursym.P
 	c = int32(p.Pc) // even p->link might need extra padding

src/cmd/internal/obj/arm64/asm7.go

@@ -629,7 +629,7 @@ func span7(ctxt *obj.Link, cursym *obj.LSym) {
 	/*
 	 * lay out the code, emitting code and data relocations.
 	 */
-	obj.Symgrow(ctxt, cursym, cursym.Size)
+	cursym.Grow(cursym.Size)
 	bp := cursym.P
 	psz := int32(0)
 	var i int

src/cmd/internal/obj/data.go

@@ -36,10 +36,11 @@ import (
 	"math"
 )
 
-func Symgrow(ctxt *Link, s *LSym, lsiz int64) {
+// Grow increases the length of s.P to lsiz.
+func (s *LSym) Grow(lsiz int64) {
 	siz := int(lsiz)
 	if int64(siz) != lsiz {
-		log.Fatalf("Symgrow size %d too long", lsiz)
+		log.Fatalf("LSym.Grow size %d too long", lsiz)
 	}
 	if len(s.P) >= siz {
 		return
@@ -60,7 +61,7 @@ func (s *LSym) prepwrite(ctxt *Link, off int64, siz int) {
 	if s.Type == SBSS || s.Type == STLSBSS {
 		ctxt.Diag("cannot supply data for BSS var")
 	}
-	Symgrow(ctxt, s, off+int64(siz))
+	s.Grow(off + int64(siz))
 }
 
 // WriteFloat32 writes f into s at offset off.
@@ -127,7 +128,7 @@ func Setuintxx(ctxt *Link, s *LSym, off int64, v uint64, wid int64) int64 {
 	}
 	if s.Size < off+wid {
 		s.Size = off + wid
-		Symgrow(ctxt, s, s.Size)
+		s.Grow(s.Size)
 	}
 
 	switch wid {

src/cmd/internal/obj/mips/asm0.go

@@ -415,7 +415,7 @@ func span0(ctxt *obj.Link, cursym *obj.LSym) {
 	 * lay out the code, emitting code and data relocations.
 	 */
 
-	obj.Symgrow(ctxt, cursym, cursym.Size)
+	cursym.Grow(cursym.Size)
 
 	bp := cursym.P
 	var i int32

src/cmd/internal/obj/ppc64/asm9.go

@@ -506,7 +506,7 @@ func span9(ctxt *obj.Link, cursym *obj.LSym) {
 	 * lay out the code, emitting code and data relocations.
 	 */
 
-	obj.Symgrow(ctxt, cursym, cursym.Size)
+	cursym.Grow(cursym.Size)
 
 	bp := cursym.P
 	var i int32

src/cmd/internal/obj/x86/asm6.go

@@ -1748,7 +1748,7 @@ func fillnop(p []byte, n int) {
 }
 
 func naclpad(ctxt *obj.Link, s *obj.LSym, c int32, pad int32) int32 {
-	obj.Symgrow(ctxt, s, int64(c)+int64(pad))
+	s.Grow(int64(c) + int64(pad))
 	fillnop(s.P[c:], int(pad))
 	return c + pad
 }
@@ -1878,7 +1878,7 @@ func span6(ctxt *obj.Link, s *obj.LSym) {
 				v := -c & (LoopAlign - 1)
 
 				if v <= MaxLoopPad {
-					obj.Symgrow(ctxt, s, int64(c)+int64(v))
+					s.Grow(int64(c) + int64(v))
 					fillnop(s.P[c:], int(v))
 					c += v
 				}
@@ -1915,7 +1915,7 @@ func span6(ctxt *obj.Link, s *obj.LSym) {
 				loop++
 			}
 
-			obj.Symgrow(ctxt, s, p.Pc+int64(m))
+			s.Grow(p.Pc + int64(m))
 			copy(s.P[p.Pc:], ctxt.AsmBuf.Bytes())
 			c += int32(m)
 		}
@@ -1940,7 +1940,7 @@ func span6(ctxt *obj.Link, s *obj.LSym) {
 	// Pad functions with trap instruction, to catch invalid jumps
 	if c&(FuncAlign-1) != 0 {
 		v := -c & (FuncAlign - 1)
-		obj.Symgrow(ctxt, s, int64(c)+int64(v))
+		s.Grow(int64(c) + int64(v))
 		for i := c; i < c+v; i++ {
 			// 0xCC is INT $3 - breakpoint instruction
 			s.P[i] = uint8(0xCC)