cmd/all: stop generating ADATA Progs

The only remaining place that generated ADATA
Prog was the assembler. Stop, and delete some
now-dead code.

Passes toolstash -cmp.

Change-Id: I26578ff1b4868e98562b44f69d909c083e96f8d5
Reviewed-on: https://go-review.googlesource.com/20646
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/cmd/asm/internal/asm/asm.go

@@ -219,18 +219,23 @@ func (p *Parser) asmData(word string, operands [][]lex.Token) {
 	}
 	p.dataAddr[name] = nameAddr.Offset + int64(scale)
 
-	prog := &obj.Prog{
-		Ctxt:   p.ctxt,
-		As:     obj.ADATA,
-		Lineno: p.histLineNum,
-		From:   nameAddr,
-		From3: &obj.Addr{
-			Offset: int64(scale),
-		},
-		To: valueAddr,
+	switch valueAddr.Type {
+	case obj.TYPE_CONST:
+		nameAddr.Sym.WriteInt(p.ctxt, nameAddr.Offset, int64(scale), valueAddr.Offset)
+	case obj.TYPE_FCONST:
+		switch scale {
+		case 4:
+			nameAddr.Sym.WriteFloat32(p.ctxt, nameAddr.Offset, float32(valueAddr.Val.(float64)))
+		case 8:
+			nameAddr.Sym.WriteFloat64(p.ctxt, nameAddr.Offset, valueAddr.Val.(float64))
+		default:
+			panic("bad float scale")
+		}
+	case obj.TYPE_SCONST:
+		nameAddr.Sym.WriteString(p.ctxt, nameAddr.Offset, int64(scale), valueAddr.Val.(string))
+	case obj.TYPE_ADDR:
+		nameAddr.Sym.WriteAddr(p.ctxt, nameAddr.Offset, int64(scale), valueAddr.Sym, valueAddr.Offset)
 	}
-
-	p.append(prog, "", false)
 }
 
 // asmGlobl assembles a GLOBL pseudo-op.

src/cmd/compile/internal/arm/peep.go

@@ -1547,7 +1547,6 @@ func predicable(p *obj.Prog) bool {
 	switch p.As {
 	case obj.ANOP,
 		obj.AXXX,
-		obj.ADATA,
 		obj.AGLOBL,
 		obj.ATEXT,
 		arm.AWORD:

src/cmd/compile/internal/gc/gsubr.go

@@ -100,7 +100,7 @@ func Gbranch(as obj.As, t *Type, likely int) *obj.Prog {
 func Prog(as obj.As) *obj.Prog {
 	var p *obj.Prog
 
-	if as == obj.ADATA || as == obj.AGLOBL {
+	if as == obj.AGLOBL {
 		if ddumped {
 			Fatalf("already dumped data")
 		}

src/cmd/compile/internal/gc/plive.go

@@ -864,7 +864,7 @@ func checkptxt(fn *Node, firstp *obj.Prog) {
 		if false {
 			fmt.Printf("analyzing '%v'\n", p)
 		}
-		if p.As != obj.ADATA && p.As != obj.AGLOBL && p.As != obj.ATYPE {
+		if p.As != obj.AGLOBL && p.As != obj.ATYPE {
 			checkprog(fn, p)
 		}
 	}

src/cmd/internal/obj/data.go

@@ -110,65 +110,6 @@ func (s *LSym) WriteString(ctxt *Link, off, siz int64, str string) {
 	copy(s.P[off:off+siz], str)
 }
 
-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("savedata: bad off=%d siz=%d", off, siz)
-	}
-	if s.Type == SBSS || s.Type == STLSBSS {
-		ctxt.Diag("cannot supply data for BSS var")
-	}
-	Symgrow(ctxt, s, int64(off+siz))
-
-	switch p.To.Type {
-	default:
-		ctxt.Diag("bad data: %v", p)
-
-	case TYPE_FCONST:
-		switch siz {
-		default:
-			ctxt.Diag("unexpected %d-byte floating point constant", siz)
-
-		case 4:
-			flt := math.Float32bits(float32(p.To.Val.(float64)))
-			ctxt.Arch.ByteOrder.PutUint32(s.P[off:], flt)
-
-		case 8:
-			flt := math.Float64bits(p.To.Val.(float64))
-			ctxt.Arch.ByteOrder.PutUint64(s.P[off:], flt)
-		}
-
-	case TYPE_SCONST:
-		copy(s.P[off:off+siz], p.To.Val.(string))
-
-	case TYPE_CONST, TYPE_ADDR:
-		if p.To.Sym != nil || p.To.Type == TYPE_ADDR {
-			r := Addrel(s)
-			r.Off = off
-			r.Siz = uint8(siz)
-			r.Sym = p.To.Sym
-			r.Type = R_ADDR
-			r.Add = p.To.Offset
-			break
-		}
-		o := p.To.Offset
-		switch siz {
-		default:
-			ctxt.Diag("unexpected %d-byte integer constant", siz)
-		case 1:
-			s.P[off] = byte(o)
-		case 2:
-			ctxt.Arch.ByteOrder.PutUint16(s.P[off:], uint16(o))
-		case 4:
-			ctxt.Arch.ByteOrder.PutUint32(s.P[off:], uint32(o))
-		case 8:
-			ctxt.Arch.ByteOrder.PutUint64(s.P[off:], uint64(o))
-		}
-	}
-}
-
 func Addrel(s *LSym) *Reloc {
 	s.R = append(s.R, Reloc{})
 	return &s.R[len(s.R)-1]

src/cmd/internal/obj/link.go

@@ -198,7 +198,7 @@ const (
 )
 
 // TODO(rsc): Describe prog.
-// TODO(rsc): Describe TEXT/GLOBL flag in from3, DATA width in from3.
+// TODO(rsc): Describe TEXT/GLOBL flag in from3
 type Prog struct {
 	Ctxt   *Link
 	Link   *Prog
@@ -266,7 +266,7 @@ const (
 	AXXX As = iota
 	ACALL
 	ACHECKNIL
-	ADATA
+	ADATA // used only by the assembler for parsing
 	ADUFFCOPY
 	ADUFFZERO
 	AEND

src/cmd/internal/obj/objfile.go

@@ -200,10 +200,6 @@ func flushplist(ctxt *Link, freeProgs bool) {
 				ctxt.Edata = s
 				continue
 
-			case ADATA:
-				savedata(ctxt, p)
-				continue
-
 			case ATEXT:
 				s := p.From.Sym
 				if s == nil {

src/cmd/internal/obj/util.go

@@ -288,7 +288,7 @@ func (p *Prog) String() string {
 		sep = ", "
 	}
 	if p.From3Type() != TYPE_NONE {
-		if p.From3.Type == TYPE_CONST && (p.As == ADATA || p.As == ATEXT || p.As == AGLOBL) {
+		if p.From3.Type == TYPE_CONST && (p.As == ATEXT || p.As == AGLOBL) {
 			// Special case - omit $.
 			fmt.Fprintf(&buf, "%s%d", sep, p.From3.Offset)
 		} else {

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

@@ -1100,7 +1100,6 @@ var optab =
 	{ACQO, ynone, Pw, [23]uint8{0x99}},
 	{ADAA, ynone, P32, [23]uint8{0x27}},
 	{ADAS, ynone, P32, [23]uint8{0x2f}},
-	{obj.ADATA, nil, 0, [23]uint8{}},
 	{ADECB, yincb, Pb, [23]uint8{0xfe, 01}},
 	{ADECL, yincl, Px1, [23]uint8{0x48, 0xff, 01}},
 	{ADECQ, yincq, Pw, [23]uint8{0xff, 01}},