cmd/compile: clean up savedata

Simplify function signature.
Remove unused Ctxt field Enforce_data_order.

Passes toolstash -cmp.

Change-Id: I5caa270ca9ae725708fe415b2c978b5f40780255
Reviewed-on: https://go-review.googlesource.com/20644
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/internal/obj/data.go

@@ -52,14 +52,12 @@ func Symgrow(ctxt *Link, s *LSym, lsiz int64) {
 	s.P = s.P[:siz]
 }
 
-func savedata(ctxt *Link, s *LSym, p *Prog, file string) {
+func savedata(ctxt *Link, p *Prog) {
+	s := p.From.Sym
 	off := int32(p.From.Offset)
 	siz := int32(p.From3.Offset)
 	if off < 0 || siz < 0 || off >= 1<<30 || siz >= 100 {
-		log.Fatalf("%s: mangled input file", file)
-	}
-	if ctxt.Enforce_data_order != 0 && off < int32(len(s.P)) {
-		ctxt.Diag("data out of order (already have %d)\n%v", len(s.P), p)
+		log.Fatalf("savedata: bad off=%d siz=%d", off, siz)
 	}
 	if s.Type == SBSS || s.Type == STLSBSS {
 		ctxt.Diag("cannot supply data for BSS var")

src/cmd/internal/obj/link.go

@@ -602,55 +602,54 @@ const (
 // Link holds the context for writing object code from a compiler
 // to be linker input or for reading that input into the linker.
 type Link struct {
-	Goarm              int32
-	Headtype           int
-	Arch               *LinkArch
-	Debugasm           int32
-	Debugvlog          int32
-	Debugdivmod        int32
-	Debugpcln          int32
-	Flag_shared        int32
-	Flag_dynlink       bool
-	Flag_optimize      bool
-	Bso                *Biobuf
-	Pathname           string
-	Windows            int32
-	Goroot             string
-	Goroot_final       string
-	Enforce_data_order int32
-	Hash               map[SymVer]*LSym
-	LineHist           LineHist
-	Imports            []string
-	Plist              *Plist
-	Plast              *Plist
-	Sym_div            *LSym
-	Sym_divu           *LSym
-	Sym_mod            *LSym
-	Sym_modu           *LSym
-	Plan9privates      *LSym
-	Curp               *Prog
-	Printp             *Prog
-	Blitrl             *Prog
-	Elitrl             *Prog
-	Rexflag            int
-	Vexflag            int
-	Rep                int
-	Repn               int
-	Lock               int
-	Asmode             int
-	Andptr             []byte
-	And                [100]uint8
-	Instoffset         int64
-	Autosize           int32
-	Armsize            int32
-	Pc                 int64
-	DiagFunc           func(string, ...interface{})
-	Mode               int
-	Cursym             *LSym
-	Version            int
-	Textp              *LSym
-	Etextp             *LSym
-	Errors             int
+	Goarm         int32
+	Headtype      int
+	Arch          *LinkArch
+	Debugasm      int32
+	Debugvlog     int32
+	Debugdivmod   int32
+	Debugpcln     int32
+	Flag_shared   int32
+	Flag_dynlink  bool
+	Flag_optimize bool
+	Bso           *Biobuf
+	Pathname      string
+	Windows       int32
+	Goroot        string
+	Goroot_final  string
+	Hash          map[SymVer]*LSym
+	LineHist      LineHist
+	Imports       []string
+	Plist         *Plist
+	Plast         *Plist
+	Sym_div       *LSym
+	Sym_divu      *LSym
+	Sym_mod       *LSym
+	Sym_modu      *LSym
+	Plan9privates *LSym
+	Curp          *Prog
+	Printp        *Prog
+	Blitrl        *Prog
+	Elitrl        *Prog
+	Rexflag       int
+	Vexflag       int
+	Rep           int
+	Repn          int
+	Lock          int
+	Asmode        int
+	Andptr        []byte
+	And           [100]uint8
+	Instoffset    int64
+	Autosize      int32
+	Armsize       int32
+	Pc            int64
+	DiagFunc      func(string, ...interface{})
+	Mode          int
+	Cursym        *LSym
+	Version       int
+	Textp         *LSym
+	Etextp        *LSym
+	Errors        int
 
 	// state for writing objects
 	Text  *LSym

src/cmd/internal/obj/objfile.go

@@ -201,7 +201,7 @@ func flushplist(ctxt *Link, freeProgs bool) {
 				continue
 
 			case ADATA:
-				savedata(ctxt, p.From.Sym, p, "<input>")
+				savedata(ctxt, p)
 				continue
 
 			case ATEXT: