cmd/internal: C->Go printf cleanup

Change-Id: I1cf94377c613fb51ae77f4fe1e3439268b1606a9
Reviewed-on: https://go-review.googlesource.com/9161Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/internal/gc/lex.go

@@ -2424,16 +2424,13 @@ var lexn = []struct {
 	{LVAR, "VAR"},
 }
 
-var lexname_buf string
-
 func lexname(lex int) string {
 	for i := 0; i < len(lexn); i++ {
 		if lexn[i].lex == lex {
 			return lexn[i].name
 		}
 	}
-	lexname_buf = fmt.Sprintf("LEX-%d", lex)
-	return lexname_buf
+	return fmt.Sprintf("LEX-%d", lex)
 }
 
 var yytfix = []struct {

src/cmd/internal/gc/typecheck.go

@@ -75,8 +75,6 @@ var _typekind = []string{
 	TIDEAL:      "untyped number",
 }
 
-var typekind_buf string
-
 func typekind(t *Type) string {
 	if Isslice(t) {
 		return "slice"
@@ -88,8 +86,7 @@ func typekind(t *Type) string {
 			return s
 		}
 	}
-	typekind_buf = fmt.Sprintf("etype=%d", et)
-	return typekind_buf
+	return fmt.Sprintf("etype=%d", et)
 }
 
 /*

src/cmd/internal/ld/sym.go

@@ -33,10 +33,10 @@ package ld
 
 import (
 	"cmd/internal/obj"
-	"fmt"
 	"log"
 	"os"
 	"path/filepath"
+	"strconv"
 )
 
 func yy_isalpha(c int) bool {
@@ -208,16 +208,13 @@ func Linkrlookup(ctxt *Link, name string, v int) *LSym {
 	return _lookup(ctxt, name, v, 0)
 }
 
-var headstr_buf string
-
 func Headstr(v int) string {
 	for i := 0; i < len(headers); i++ {
 		if v == headers[i].val {
 			return headers[i].name
 		}
 	}
-	headstr_buf = fmt.Sprintf("%d", v)
-	return headstr_buf
+	return strconv.Itoa(v)
 }
 
 func headtype(name string) int {

src/cmd/internal/obj/flag.go

@@ -93,7 +93,7 @@ func (i *int32Value) Set(s string) error {
 
 func (i *int32Value) Get() interface{} { return int32(*i) }
 
-func (i *int32Value) String() string { return fmt.Sprintf("%v", *i) }
+func (i *int32Value) String() string { return fmt.Sprint(*i) }
 
 type fn0 func()
 

src/cmd/internal/obj/util.go

@@ -379,7 +379,7 @@ func Dconv(p *Prog, a *Addr) string {
 			break
 		}
 
-		str = fmt.Sprintf("%v", Rconv(int(a.Reg)))
+		str = Rconv(int(a.Reg))
 		if a.Name != TYPE_NONE || a.Sym != nil {
 			str = fmt.Sprintf("%v(%v)(REG)", Mconv(a), Rconv(int(a.Reg)))
 		}
@@ -388,9 +388,9 @@ func Dconv(p *Prog, a *Addr) string {
 		if a.Sym != nil {
 			str = fmt.Sprintf("%s(SB)", a.Sym.Name)
 		} else if p != nil && p.Pcond != nil {
-			str = fmt.Sprintf("%d", p.Pcond.Pc)
+			str = fmt.Sprint(p.Pcond.Pc)
 		} else if a.Val != nil {
-			str = fmt.Sprintf("%d", a.Val.(*Prog).Pc)
+			str = fmt.Sprint(a.Val.(*Prog).Pc)
 		} else {
 			str = fmt.Sprintf("%d(PC)", a.Offset)
 		}
@@ -467,7 +467,7 @@ func Mconv(a *Addr) string {
 	case NAME_NONE:
 		switch {
 		case a.Reg == REG_NONE:
-			str = fmt.Sprintf("%d", a.Offset)
+			str = fmt.Sprint(a.Offset)
 		case a.Offset == 0:
 			str = fmt.Sprintf("(%v)", Rconv(int(a.Reg)))
 		case a.Offset != 0: