cmd: collapse internal/obj/fmt.go into compile/internal/gc/fmt.go

The obj.Fmt* values are only used by gc/fmt.go, so just move them
there. Also, add comments documenting the correspondance between
FmtFoo names and their flag characters to make understanding the
existing documentation slightly less confusing.

While here, add a new FmtFlag named type to represent these values.

Change-Id: I9631214b892557d094823f1ac575d0c43a84007b
Reviewed-on: https://go-review.googlesource.com/20717
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/cmd/compile/internal/gc/align.go b/src/cmd/compile/internal/gc/align.go
index 820155b..94dca9a 100644
--- a/src/cmd/compile/internal/gc/align.go
+++ b/src/cmd/compile/internal/gc/align.go
@@ -4,8 +4,6 @@
 
 package gc
 
-import "cmd/internal/obj"
-
 // machine size and rounding alignment is dictated around
 // the size of a pointer, set in betypeinit (see ../amd64/galign.go).
 var defercalc int
@@ -74,7 +72,7 @@
 		}
 		o += w
 		if o >= Thearch.MAXWIDTH {
-			Yyerror("type %v too large", Tconv(errtype, obj.FmtLong))
+			Yyerror("type %v too large", Tconv(errtype, FmtLong))
 			o = 8 // small but nonzero
 		}
 	}
@@ -248,7 +246,7 @@
 			if t.Type.Width != 0 {
 				cap := (uint64(Thearch.MAXWIDTH) - 1) / uint64(t.Type.Width)
 				if uint64(t.Bound) > cap {
-					Yyerror("type %v larger than address space", Tconv(t, obj.FmtLong))
+					Yyerror("type %v larger than address space", Tconv(t, FmtLong))
 				}
 			}
 
diff --git a/src/cmd/compile/internal/gc/bexport.go b/src/cmd/compile/internal/gc/bexport.go
index 3c77747..c539fe5 100644
--- a/src/cmd/compile/internal/gc/bexport.go
+++ b/src/cmd/compile/internal/gc/bexport.go
@@ -336,7 +336,7 @@
 	}
 	for _, f := range p.inlined {
 		if p.trace {
-			p.tracef("{ %s }\n", Hconv(f.Inl, obj.FmtSharp))
+			p.tracef("{ %s }\n", Hconv(f.Inl, FmtSharp))
 		}
 		p.nodeList(f.Inl)
 		if p.trace {
diff --git a/src/cmd/compile/internal/gc/cgen.go b/src/cmd/compile/internal/gc/cgen.go
index dced3b0..37eb776 100644
--- a/src/cmd/compile/internal/gc/cgen.go
+++ b/src/cmd/compile/internal/gc/cgen.go
@@ -361,7 +361,7 @@
 	default:
 		Dump("cgen", n)
 		Dump("cgen-res", res)
-		Fatalf("cgen: unknown op %v", Nconv(n, obj.FmtShort|obj.FmtSign))
+		Fatalf("cgen: unknown op %v", Nconv(n, FmtShort|FmtSign))
 
 	case OOROR, OANDAND,
 		OEQ, ONE,
@@ -592,7 +592,7 @@
 			break
 		}
 
-		Fatalf("cgen: OLEN: unknown type %v", Tconv(nl.Type, obj.FmtLong))
+		Fatalf("cgen: OLEN: unknown type %v", Tconv(nl.Type, FmtLong))
 
 	case OCAP:
 		if Istype(nl.Type, TCHAN) {
@@ -630,7 +630,7 @@
 			break
 		}
 
-		Fatalf("cgen: OCAP: unknown type %v", Tconv(nl.Type, obj.FmtLong))
+		Fatalf("cgen: OCAP: unknown type %v", Tconv(nl.Type, FmtLong))
 
 	case OADDR:
 		if n.Bounded { // let race detector avoid nil checks
@@ -1541,7 +1541,7 @@
 
 	switch n.Op {
 	default:
-		Fatalf("agen: unknown op %v", Nconv(n, obj.FmtShort|obj.FmtSign))
+		Fatalf("agen: unknown op %v", Nconv(n, FmtShort|FmtSign))
 
 	case OCALLMETH:
 		cgen_callmeth(n, 0)
@@ -1856,7 +1856,7 @@
 	case OLITERAL:
 		// n is a constant.
 		if !Isconst(n, CTBOOL) {
-			Fatalf("bgen: non-bool const %v\n", Nconv(n, obj.FmtLong))
+			Fatalf("bgen: non-bool const %v\n", Nconv(n, FmtLong))
 		}
 		if genval {
 			Cgen(Nodbool(wantTrue == n.Val().U.(bool)), res)
diff --git a/src/cmd/compile/internal/gc/closure.go b/src/cmd/compile/internal/gc/closure.go
index 7417ba0..722a874 100644
--- a/src/cmd/compile/internal/gc/closure.go
+++ b/src/cmd/compile/internal/gc/closure.go
@@ -5,7 +5,6 @@
 package gc
 
 import (
-	"cmd/internal/obj"
 	"fmt"
 )
 
@@ -80,7 +79,7 @@
 		if !n.Name.Captured {
 			n.Name.Captured = true
 			if n.Name.Decldepth == 0 {
-				Fatalf("typecheckclosure: var %v does not have decldepth assigned", Nconv(n, obj.FmtShort))
+				Fatalf("typecheckclosure: var %v does not have decldepth assigned", Nconv(n, FmtShort))
 			}
 
 			// Ignore assignments to the variable in straightline code
@@ -165,7 +164,7 @@
 		n.Func.Outerfunc.Func.Closgen++
 		gen = n.Func.Outerfunc.Func.Closgen
 	} else {
-		Fatalf("closurename called for %v", Nconv(n, obj.FmtShort))
+		Fatalf("closurename called for %v", Nconv(n, FmtShort))
 	}
 	n.Sym = Lookupf("%s.%s%d", outer, prefix, gen)
 	return n.Sym
@@ -487,9 +486,9 @@
 
 	rcvrtype := fn.Left.Type
 	if exportname(meth.Sym.Name) {
-		p = fmt.Sprintf("(%v).%s-fm", Tconv(rcvrtype, obj.FmtLeft|obj.FmtShort), meth.Sym.Name)
+		p = fmt.Sprintf("(%v).%s-fm", Tconv(rcvrtype, FmtLeft|FmtShort), meth.Sym.Name)
 	} else {
-		p = fmt.Sprintf("(%v).(%v)-fm", Tconv(rcvrtype, obj.FmtLeft|obj.FmtShort), Sconv(meth.Sym, obj.FmtLeft))
+		p = fmt.Sprintf("(%v).(%v)-fm", Tconv(rcvrtype, FmtLeft|FmtShort), Sconv(meth.Sym, FmtLeft))
 	}
 	basetype := rcvrtype
 	if Isptr[rcvrtype.Etype] {
diff --git a/src/cmd/compile/internal/gc/const.go b/src/cmd/compile/internal/gc/const.go
index f2a3e7d..0edcc61 100644
--- a/src/cmd/compile/internal/gc/const.go
+++ b/src/cmd/compile/internal/gc/const.go
@@ -362,7 +362,7 @@
 		f := newMpflt()
 		mpmovefltflt(f, &v.U.(*Mpcplx).Real)
 		if mpcmpfltc(&v.U.(*Mpcplx).Imag, 0) != 0 {
-			Yyerror("constant %v%vi truncated to real", Fconv(&v.U.(*Mpcplx).Real, obj.FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, obj.FmtSharp|obj.FmtSign))
+			Yyerror("constant %v%vi truncated to real", Fconv(&v.U.(*Mpcplx).Real, FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, FmtSharp|FmtSign))
 		}
 		v.U = f
 	}
@@ -385,17 +385,17 @@
 			if f.Val.IsInt() {
 				msg = "constant %v overflows integer"
 			}
-			Yyerror(msg, Fconv(f, obj.FmtSharp))
+			Yyerror(msg, Fconv(f, FmtSharp))
 		}
 		v.U = i
 
 	case CTCPLX:
 		i := new(Mpint)
 		if mpmovefltfix(i, &v.U.(*Mpcplx).Real) < 0 {
-			Yyerror("constant %v%vi truncated to integer", Fconv(&v.U.(*Mpcplx).Real, obj.FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, obj.FmtSharp|obj.FmtSign))
+			Yyerror("constant %v%vi truncated to integer", Fconv(&v.U.(*Mpcplx).Real, FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, FmtSharp|FmtSign))
 		}
 		if mpcmpfltc(&v.U.(*Mpcplx).Imag, 0) != 0 {
-			Yyerror("constant %v%vi truncated to real", Fconv(&v.U.(*Mpcplx).Real, obj.FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, obj.FmtSharp|obj.FmtSign))
+			Yyerror("constant %v%vi truncated to real", Fconv(&v.U.(*Mpcplx).Real, FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, FmtSharp|FmtSign))
 		}
 		v.U = i
 	}
@@ -1280,7 +1280,7 @@
 		Yyerror("defaultlit: unknown literal: %v", n)
 
 	case CTxxx:
-		Fatalf("defaultlit: idealkind is CTxxx: %v", Nconv(n, obj.FmtSign))
+		Fatalf("defaultlit: idealkind is CTxxx: %v", Nconv(n, FmtSign))
 
 	case CTBOOL:
 		t1 := Types[TBOOL]
@@ -1487,7 +1487,7 @@
 		var i int64
 		switch n.Val().Ctype() {
 		default:
-			Fatalf("convconst ctype=%d %v", n.Val().Ctype(), Tconv(t, obj.FmtLong))
+			Fatalf("convconst ctype=%d %v", n.Val().Ctype(), Tconv(t, FmtLong))
 
 		case CTINT, CTRUNE:
 			i = Mpgetfix(n.Val().U.(*Mpint))
@@ -1524,7 +1524,7 @@
 		return
 	}
 
-	Fatalf("convconst %v constant", Tconv(t, obj.FmtLong))
+	Fatalf("convconst %v constant", Tconv(t, FmtLong))
 }
 
 // complex multiply v *= rv
diff --git a/src/cmd/compile/internal/gc/dcl.go b/src/cmd/compile/internal/gc/dcl.go
index 5cd8ae9..f59b99c 100644
--- a/src/cmd/compile/internal/gc/dcl.go
+++ b/src/cmd/compile/internal/gc/dcl.go
@@ -1221,15 +1221,15 @@
 
 	if (spkg == nil || nsym.Pkg != spkg) && !exportname(nsym.Name) {
 		if t0.Sym == nil && Isptr[t0.Etype] {
-			p = fmt.Sprintf("(%v).%s.%s%s", Tconv(t0, obj.FmtLeft|obj.FmtShort), nsym.Pkg.Prefix, nsym.Name, suffix)
+			p = fmt.Sprintf("(%v).%s.%s%s", Tconv(t0, FmtLeft|FmtShort), nsym.Pkg.Prefix, nsym.Name, suffix)
 		} else {
-			p = fmt.Sprintf("%v.%s.%s%s", Tconv(t0, obj.FmtLeft|obj.FmtShort), nsym.Pkg.Prefix, nsym.Name, suffix)
+			p = fmt.Sprintf("%v.%s.%s%s", Tconv(t0, FmtLeft|FmtShort), nsym.Pkg.Prefix, nsym.Name, suffix)
 		}
 	} else {
 		if t0.Sym == nil && Isptr[t0.Etype] {
-			p = fmt.Sprintf("(%v).%s%s", Tconv(t0, obj.FmtLeft|obj.FmtShort), nsym.Name, suffix)
+			p = fmt.Sprintf("(%v).%s%s", Tconv(t0, FmtLeft|FmtShort), nsym.Name, suffix)
 		} else {
-			p = fmt.Sprintf("%v.%s%s", Tconv(t0, obj.FmtLeft|obj.FmtShort), nsym.Name, suffix)
+			p = fmt.Sprintf("%v.%s%s", Tconv(t0, FmtLeft|FmtShort), nsym.Name, suffix)
 		}
 	}
 
@@ -1339,7 +1339,7 @@
 
 		// Should have picked off all the reasons above,
 		// but just in case, fall back to generic error.
-		Yyerror("invalid receiver type %v (%v / %v)", pa, Tconv(pa, obj.FmtLong), Tconv(t, obj.FmtLong))
+		Yyerror("invalid receiver type %v (%v / %v)", pa, Tconv(pa, FmtLong), Tconv(t, FmtLong))
 
 		return
 	}
@@ -1383,7 +1383,7 @@
 
 	// during import unexported method names should be in the type's package
 	if tpkg != nil && f.Sym != nil && !exportname(f.Sym.Name) && f.Sym.Pkg != tpkg {
-		Fatalf("imported method name %v in wrong package %s\n", Sconv(f.Sym, obj.FmtSign), tpkg.Name)
+		Fatalf("imported method name %v in wrong package %s\n", Sconv(f.Sym, FmtSign), tpkg.Name)
 	}
 
 	if d == nil {
diff --git a/src/cmd/compile/internal/gc/esc.go b/src/cmd/compile/internal/gc/esc.go
index 7f7b757..333f218 100644
--- a/src/cmd/compile/internal/gc/esc.go
+++ b/src/cmd/compile/internal/gc/esc.go
@@ -5,7 +5,6 @@
 package gc
 
 import (
-	"cmd/internal/obj"
 	"fmt"
 	"strconv"
 	"strings"
@@ -455,7 +454,7 @@
 	if Debug['m'] != 0 {
 		for _, n := range e.noesc {
 			if n.Esc == EscNone {
-				Warnl(n.Lineno, "%v %v does not escape", e.curfnSym(n), Nconv(n, obj.FmtShort))
+				Warnl(n.Lineno, "%v %v does not escape", e.curfnSym(n), Nconv(n, FmtShort))
 			}
 		}
 	}
@@ -538,7 +537,7 @@
 	switch n.Op {
 	case OLABEL:
 		if n.Left == nil || n.Left.Sym == nil {
-			Fatalf("esc:label without label: %v", Nconv(n, obj.FmtSign))
+			Fatalf("esc:label without label: %v", Nconv(n, FmtSign))
 		}
 
 		// Walk will complain about this label being already defined, but that's not until
@@ -549,7 +548,7 @@
 
 	case OGOTO:
 		if n.Left == nil || n.Left.Sym == nil {
-			Fatalf("esc:goto without label: %v", Nconv(n, obj.FmtSign))
+			Fatalf("esc:goto without label: %v", Nconv(n, FmtSign))
 		}
 
 		// If we come past one that's uninitialized, this must be a (harmless) forward jump
@@ -712,7 +711,7 @@
 			// b escapes as well. If we ignore such OSLICEARR, we will conclude
 			// that b does not escape when b contents do.
 			if Debug['m'] != 0 {
-				Warnl(n.Lineno, "%v ignoring self-assignment to %v", e.curfnSym(n), Nconv(n.Left, obj.FmtShort))
+				Warnl(n.Lineno, "%v ignoring self-assignment to %v", e.curfnSym(n), Nconv(n.Left, FmtShort))
 			}
 
 			break
@@ -808,7 +807,7 @@
 			slice2 := n.List.Second()
 			escassignDereference(e, &e.theSink, slice2) // lose track of assign of dereference
 			if Debug['m'] > 2 {
-				Warnl(n.Lineno, "%v special treatment of append(slice1, slice2...) %v", e.curfnSym(n), Nconv(n, obj.FmtShort))
+				Warnl(n.Lineno, "%v special treatment of append(slice1, slice2...) %v", e.curfnSym(n), Nconv(n, FmtShort))
 			}
 		}
 		escassignDereference(e, &e.theSink, n.List.First()) // The original elements are now leaked, too
@@ -938,8 +937,8 @@
 	if Debug['m'] > 1 {
 		fmt.Printf("%v:[%d] %v escassign: %v(%v)[%v] = %v(%v)[%v]\n",
 			linestr(lineno), e.loopdepth, funcSym(Curfn),
-			Nconv(dst, obj.FmtShort), Jconv(dst, obj.FmtShort), Oconv(dst.Op, 0),
-			Nconv(src, obj.FmtShort), Jconv(src, obj.FmtShort), Oconv(src.Op, 0))
+			Nconv(dst, FmtShort), Jconv(dst, FmtShort), Oconv(dst.Op, 0),
+			Nconv(src, FmtShort), Jconv(src, FmtShort), Oconv(src.Op, 0))
 	}
 
 	setlineno(dst)
@@ -1207,7 +1206,7 @@
 
 	if Debug['m'] > 2 {
 		fmt.Printf("%v::assignfromtag:: src=%v, em=%s\n",
-			linestr(lineno), Nconv(src, obj.FmtShort), describeEscape(em))
+			linestr(lineno), Nconv(src, FmtShort), describeEscape(em))
 	}
 
 	if em == EscUnknown {
@@ -1377,7 +1376,7 @@
 		for _, n1 := range ll.Slice() {
 			escassign(e, &e.theSink, n1)
 			if Debug['m'] > 2 {
-				fmt.Printf("%v::esccall:: indirect call <- %v, untracked\n", linestr(lineno), Nconv(n1, obj.FmtShort))
+				fmt.Printf("%v::esccall:: indirect call <- %v, untracked\n", linestr(lineno), Nconv(n1, FmtShort))
 			}
 		}
 		// Set up bogus outputs
@@ -1397,7 +1396,7 @@
 	if fn != nil && fn.Op == ONAME && fn.Class == PFUNC &&
 		fn.Name.Defn != nil && len(fn.Name.Defn.Nbody.Slice()) != 0 && fn.Name.Param.Ntype != nil && fn.Name.Defn.Esc < EscFuncTagged {
 		if Debug['m'] > 2 {
-			fmt.Printf("%v::esccall:: %v in recursive group\n", linestr(lineno), Nconv(n, obj.FmtShort))
+			fmt.Printf("%v::esccall:: %v in recursive group\n", linestr(lineno), Nconv(n, FmtShort))
 		}
 
 		// function in same mutually recursive group. Incorporate into flow graph.
@@ -1444,7 +1443,7 @@
 		// "..." arguments are untracked
 		for ; i < len(lls); i++ {
 			if Debug['m'] > 2 {
-				fmt.Printf("%v::esccall:: ... <- %v, untracked\n", linestr(lineno), Nconv(lls[i], obj.FmtShort))
+				fmt.Printf("%v::esccall:: ... <- %v, untracked\n", linestr(lineno), Nconv(lls[i], FmtShort))
 			}
 			escassign(e, &e.theSink, lls[i])
 		}
@@ -1454,11 +1453,11 @@
 
 	// Imported or completely analyzed function. Use the escape tags.
 	if nE.Escretval.Len() != 0 {
-		Fatalf("esc already decorated call %v\n", Nconv(n, obj.FmtSign))
+		Fatalf("esc already decorated call %v\n", Nconv(n, FmtSign))
 	}
 
 	if Debug['m'] > 2 {
-		fmt.Printf("%v::esccall:: %v not recursive\n", linestr(lineno), Nconv(n, obj.FmtShort))
+		fmt.Printf("%v::esccall:: %v not recursive\n", linestr(lineno), Nconv(n, FmtShort))
 	}
 
 	// set up out list on this call node with dummy auto ONAMES in the current (calling) function.
@@ -1528,7 +1527,7 @@
 
 	for ; i < len(lls); i++ {
 		if Debug['m'] > 2 {
-			fmt.Printf("%v::esccall:: ... <- %v\n", linestr(lineno), Nconv(lls[i], obj.FmtShort))
+			fmt.Printf("%v::esccall:: ... <- %v\n", linestr(lineno), Nconv(lls[i], FmtShort))
 		}
 		escassign(e, src, lls[i]) // args to slice
 	}
@@ -1547,7 +1546,7 @@
 	}
 
 	if Debug['m'] > 2 {
-		fmt.Printf("%v::flows:: %v <- %v\n", linestr(lineno), Nconv(dst, obj.FmtShort), Nconv(src, obj.FmtShort))
+		fmt.Printf("%v::flows:: %v <- %v\n", linestr(lineno), Nconv(dst, FmtShort), Nconv(src, FmtShort))
 	}
 
 	dstE := e.nodeEscState(dst)
@@ -1581,7 +1580,7 @@
 
 	dstE := e.nodeEscState(dst)
 	if Debug['m'] > 1 {
-		fmt.Printf("\nescflood:%d: dst %v scope:%v[%d]\n", e.walkgen, Nconv(dst, obj.FmtShort), e.curfnSym(dst), dstE.Escloopdepth)
+		fmt.Printf("\nescflood:%d: dst %v scope:%v[%d]\n", e.walkgen, Nconv(dst, FmtShort), e.curfnSym(dst), dstE.Escloopdepth)
 	}
 
 	for _, n := range dstE.Escflowsrc {
@@ -1636,7 +1635,7 @@
 
 	if Debug['m'] > 1 {
 		fmt.Printf("escwalk: level:%d depth:%d %.*s op=%v %v(%v) scope:%v[%d] extraloopdepth=%v\n",
-			level, e.pdepth, e.pdepth, "\t\t\t\t\t\t\t\t\t\t", Oconv(src.Op, 0), Nconv(src, obj.FmtShort), Jconv(src, obj.FmtShort), e.curfnSym(src), srcE.Escloopdepth, extraloopdepth)
+			level, e.pdepth, e.pdepth, "\t\t\t\t\t\t\t\t\t\t", Oconv(src.Op, 0), Nconv(src, FmtShort), Jconv(src, FmtShort), e.curfnSym(src), srcE.Escloopdepth, extraloopdepth)
 	}
 
 	e.pdepth++
@@ -1652,9 +1651,9 @@
 		// 4. return *in
 		if Debug['m'] != 0 {
 			if Debug['m'] == 1 {
-				Warnl(src.Lineno, "leaking param: %v to result %v level=%v", Nconv(src, obj.FmtShort), dst.Sym, level.int())
+				Warnl(src.Lineno, "leaking param: %v to result %v level=%v", Nconv(src, FmtShort), dst.Sym, level.int())
 			} else {
-				Warnl(src.Lineno, "leaking param: %v to result %v level=%v", Nconv(src, obj.FmtShort), dst.Sym, level)
+				Warnl(src.Lineno, "leaking param: %v to result %v level=%v", Nconv(src, FmtShort), dst.Sym, level)
 			}
 		}
 		if src.Esc&EscMask != EscReturn {
@@ -1671,7 +1670,7 @@
 		level.int() > 0 {
 		src.Esc = escMax(EscContentEscapes|src.Esc, EscNone)
 		if Debug['m'] != 0 {
-			Warnl(src.Lineno, "mark escaped content: %v", Nconv(src, obj.FmtShort))
+			Warnl(src.Lineno, "mark escaped content: %v", Nconv(src, FmtShort))
 		}
 	}
 
@@ -1684,20 +1683,20 @@
 				src.Esc = escMax(EscContentEscapes|src.Esc, EscNone)
 				if Debug['m'] != 0 {
 					if Debug['m'] == 1 {
-						Warnl(src.Lineno, "leaking param content: %v", Nconv(src, obj.FmtShort))
+						Warnl(src.Lineno, "leaking param content: %v", Nconv(src, FmtShort))
 					} else {
 						Warnl(src.Lineno, "leaking param content: %v level=%v dst.eld=%v src.eld=%v dst=%v",
-							Nconv(src, obj.FmtShort), level, dstE.Escloopdepth, modSrcLoopdepth, Nconv(dst, obj.FmtShort))
+							Nconv(src, FmtShort), level, dstE.Escloopdepth, modSrcLoopdepth, Nconv(dst, FmtShort))
 					}
 				}
 			} else {
 				src.Esc = EscScope
 				if Debug['m'] != 0 {
 					if Debug['m'] == 1 {
-						Warnl(src.Lineno, "leaking param: %v", Nconv(src, obj.FmtShort))
+						Warnl(src.Lineno, "leaking param: %v", Nconv(src, FmtShort))
 					} else {
 						Warnl(src.Lineno, "leaking param: %v level=%v dst.eld=%v src.eld=%v dst=%v",
-							Nconv(src, obj.FmtShort), level, dstE.Escloopdepth, modSrcLoopdepth, Nconv(dst, obj.FmtShort))
+							Nconv(src, FmtShort), level, dstE.Escloopdepth, modSrcLoopdepth, Nconv(dst, FmtShort))
 					}
 				}
 			}
@@ -1707,7 +1706,7 @@
 		// original variable.
 		if src.Class == PPARAMREF {
 			if leaks && Debug['m'] != 0 {
-				Warnl(src.Lineno, "leaking closure reference %v", Nconv(src, obj.FmtShort))
+				Warnl(src.Lineno, "leaking closure reference %v", Nconv(src, FmtShort))
 			}
 			escwalk(e, level, dst, src.Name.Param.Closure)
 		}
@@ -1723,9 +1722,9 @@
 				}
 				if Debug['m'] > 1 {
 					Warnl(src.Lineno, "%v escapes to heap, level=%v, dst.eld=%v, src.eld=%v",
-						Nconv(p, obj.FmtShort), level, dstE.Escloopdepth, modSrcLoopdepth)
+						Nconv(p, FmtShort), level, dstE.Escloopdepth, modSrcLoopdepth)
 				} else {
-					Warnl(src.Lineno, "%v escapes to heap", Nconv(p, obj.FmtShort))
+					Warnl(src.Lineno, "%v escapes to heap", Nconv(p, FmtShort))
 				}
 			}
 			escwalkBody(e, level.dec(), dst, src.Left, modSrcLoopdepth)
@@ -1741,7 +1740,7 @@
 		if leaks {
 			src.Esc = EscHeap
 			if Debug['m'] != 0 {
-				Warnl(src.Lineno, "%v escapes to heap", Nconv(src, obj.FmtShort))
+				Warnl(src.Lineno, "%v escapes to heap", Nconv(src, FmtShort))
 			}
 			extraloopdepth = modSrcLoopdepth
 		}
@@ -1775,7 +1774,7 @@
 		if leaks {
 			src.Esc = EscHeap
 			if Debug['m'] != 0 {
-				Warnl(src.Lineno, "%v escapes to heap", Nconv(src, obj.FmtShort))
+				Warnl(src.Lineno, "%v escapes to heap", Nconv(src, FmtShort))
 			}
 			extraloopdepth = modSrcLoopdepth
 		}
@@ -1809,7 +1808,7 @@
 			if Debug['m'] > 1 {
 				fmt.Printf("%v:[%d] dst %v escwalk replace src: %v with %v\n",
 					linestr(lineno), e.loopdepth,
-					Nconv(dst, obj.FmtShort), Nconv(src, obj.FmtShort), Nconv(srcE.Escretval.First(), obj.FmtShort))
+					Nconv(dst, FmtShort), Nconv(src, FmtShort), Nconv(srcE.Escretval.First(), FmtShort))
 			}
 			src = srcE.Escretval.First()
 			srcE = e.nodeEscState(src)
diff --git a/src/cmd/compile/internal/gc/export.go b/src/cmd/compile/internal/gc/export.go
index 083c3cb..d1d38b7 100644
--- a/src/cmd/compile/internal/gc/export.go
+++ b/src/cmd/compile/internal/gc/export.go
@@ -235,9 +235,9 @@
 	dumpexporttype(t)
 
 	if t != nil && !isideal(t) {
-		exportf("\tconst %v %v = %v\n", Sconv(s, obj.FmtSharp), Tconv(t, obj.FmtSharp), Vconv(n.Val(), obj.FmtSharp))
+		exportf("\tconst %v %v = %v\n", Sconv(s, FmtSharp), Tconv(t, FmtSharp), Vconv(n.Val(), FmtSharp))
 	} else {
-		exportf("\tconst %v = %v\n", Sconv(s, obj.FmtSharp), Vconv(n.Val(), obj.FmtSharp))
+		exportf("\tconst %v = %v\n", Sconv(s, FmtSharp), Vconv(n.Val(), FmtSharp))
 	}
 }
 
@@ -261,14 +261,14 @@
 			}
 
 			// NOTE: The space after %#S here is necessary for ld's export data parser.
-			exportf("\tfunc %v %v { %v }\n", Sconv(s, obj.FmtSharp), Tconv(t, obj.FmtShort|obj.FmtSharp), Hconv(n.Func.Inl, obj.FmtSharp|obj.FmtBody))
+			exportf("\tfunc %v %v { %v }\n", Sconv(s, FmtSharp), Tconv(t, FmtShort|FmtSharp), Hconv(n.Func.Inl, FmtSharp|FmtBody))
 
 			reexportdeplist(n.Func.Inl)
 		} else {
-			exportf("\tfunc %v %v\n", Sconv(s, obj.FmtSharp), Tconv(t, obj.FmtShort|obj.FmtSharp))
+			exportf("\tfunc %v %v\n", Sconv(s, FmtSharp), Tconv(t, FmtShort|FmtSharp))
 		}
 	} else {
-		exportf("\tvar %v %v\n", Sconv(s, obj.FmtSharp), Tconv(t, obj.FmtSharp))
+		exportf("\tvar %v %v\n", Sconv(s, FmtSharp), Tconv(t, FmtSharp))
 	}
 }
 
@@ -319,7 +319,7 @@
 	}
 	sort.Sort(methodbyname(m))
 
-	exportf("\ttype %v %v\n", Sconv(t.Sym, obj.FmtSharp), Tconv(t, obj.FmtSharp|obj.FmtLong))
+	exportf("\ttype %v %v\n", Sconv(t.Sym, FmtSharp), Tconv(t, FmtSharp|FmtLong))
 	for _, f := range m {
 		if f.Nointerface {
 			exportf("\t//go:nointerface\n")
@@ -331,10 +331,10 @@
 			if Debug['l'] < 2 {
 				typecheckinl(f.Type.Nname)
 			}
-			exportf("\tfunc %v %v %v { %v }\n", Tconv(f.Type.Recvs(), obj.FmtSharp), Sconv(f.Sym, obj.FmtShort|obj.FmtByte|obj.FmtSharp), Tconv(f.Type, obj.FmtShort|obj.FmtSharp), Hconv(f.Type.Nname.Func.Inl, obj.FmtSharp))
+			exportf("\tfunc %v %v %v { %v }\n", Tconv(f.Type.Recvs(), FmtSharp), Sconv(f.Sym, FmtShort|FmtByte|FmtSharp), Tconv(f.Type, FmtShort|FmtSharp), Hconv(f.Type.Nname.Func.Inl, FmtSharp))
 			reexportdeplist(f.Type.Nname.Func.Inl)
 		} else {
-			exportf("\tfunc %v %v %v\n", Tconv(f.Type.Recvs(), obj.FmtSharp), Sconv(f.Sym, obj.FmtShort|obj.FmtByte|obj.FmtSharp), Tconv(f.Type, obj.FmtShort|obj.FmtSharp))
+			exportf("\tfunc %v %v %v\n", Tconv(f.Type.Recvs(), FmtSharp), Sconv(f.Sym, FmtShort|FmtByte|FmtSharp), Tconv(f.Type, FmtShort|FmtSharp))
 		}
 	}
 }
@@ -552,7 +552,7 @@
 	declare(n, PEXTERN)
 
 	if Debug['E'] != 0 {
-		fmt.Printf("import var %v %v\n", s, Tconv(t, obj.FmtLong))
+		fmt.Printf("import var %v %v\n", s, Tconv(t, FmtLong))
 	}
 }
 
@@ -573,11 +573,11 @@
 		declare(n, PEXTERN)
 		checkwidth(pt)
 	} else if !Eqtype(pt.Orig, t) {
-		Yyerror("inconsistent definition for type %v during import\n\t%v (in %q)\n\t%v (in %q)", pt.Sym, Tconv(pt, obj.FmtLong), pt.Sym.Importdef.Path, Tconv(t, obj.FmtLong), importpkg.Path)
+		Yyerror("inconsistent definition for type %v during import\n\t%v (in %q)\n\t%v (in %q)", pt.Sym, Tconv(pt, FmtLong), pt.Sym.Importdef.Path, Tconv(t, FmtLong), importpkg.Path)
 	}
 
 	if Debug['E'] != 0 {
-		fmt.Printf("import type %v %v\n", pt, Tconv(t, obj.FmtLong))
+		fmt.Printf("import type %v %v\n", pt, Tconv(t, FmtLong))
 	}
 }
 
@@ -593,7 +593,7 @@
 		}
 		switch n.Op {
 		case OLITERAL:
-			fmt.Fprintf(b, "#define const_%s %v\n", n.Sym.Name, Vconv(n.Val(), obj.FmtSharp))
+			fmt.Fprintf(b, "#define const_%s %v\n", n.Sym.Name, Vconv(n.Val(), FmtSharp))
 
 		case OTYPE:
 			t := n.Type
diff --git a/src/cmd/compile/internal/gc/fmt.go b/src/cmd/compile/internal/gc/fmt.go
index fc22baa..867d99a 100644
--- a/src/cmd/compile/internal/gc/fmt.go
+++ b/src/cmd/compile/internal/gc/fmt.go
@@ -13,6 +13,24 @@
 	"unicode/utf8"
 )
 
+// A FmtFlag value is a set of flags (or 0).
+// They control how the Xconv functions format their values.
+// See the respective function's documentation for details.
+type FmtFlag int
+
+const (
+	FmtWidth    FmtFlag = 1 << iota
+	FmtLeft             // "-"
+	FmtSharp            // "#"
+	FmtSign             // "+"
+	FmtUnsigned         // "u"
+	FmtShort            // "h"
+	FmtLong             // "l"
+	FmtComma            // ","
+	FmtByte             // "hh"
+	FmtBody             // for printing export bodies
+)
+
 //
 // Format conversions
 //	%L int		Line numbers
@@ -89,22 +107,22 @@
 //	%-uT		type identifiers with package name instead of prefix (typesym, dcommontype, typehash)
 //
 
-func setfmode(flags *int) (fm int, fb bool) {
+func setfmode(flags *FmtFlag) (fm int, fb bool) {
 	fm = fmtmode
 	fb = fmtbody
-	if *flags&obj.FmtSign != 0 {
+	if *flags&FmtSign != 0 {
 		fmtmode = FDbg
-	} else if *flags&obj.FmtSharp != 0 {
+	} else if *flags&FmtSharp != 0 {
 		fmtmode = FExp
-	} else if *flags&obj.FmtLeft != 0 {
+	} else if *flags&FmtLeft != 0 {
 		fmtmode = FTypeId
 	}
 
-	if *flags&obj.FmtBody != 0 {
+	if *flags&FmtBody != 0 {
 		fmtbody = true
 	}
 
-	*flags &^= (obj.FmtSharp | obj.FmtLeft | obj.FmtSign | obj.FmtBody)
+	*flags &^= (FmtSharp | FmtLeft | FmtSign | FmtBody)
 	return
 }
 
@@ -174,8 +192,8 @@
 }
 
 // Fmt "%O":  Node opcodes
-func Oconv(o Op, flag int) string {
-	if (flag&obj.FmtSharp != 0) || fmtmode != FDbg {
+func Oconv(o Op, flag FmtFlag) string {
+	if (flag&FmtSharp != 0) || fmtmode != FDbg {
 		if o >= 0 && int(o) < len(goopnames) && goopnames[o] != "" {
 			return goopnames[o]
 		}
@@ -199,10 +217,10 @@
 }
 
 // Fmt "%J": Node details.
-func Jconv(n *Node, flag int) string {
+func Jconv(n *Node, flag FmtFlag) string {
 	var buf bytes.Buffer
 
-	c := flag & obj.FmtShort
+	c := flag & FmtShort
 
 	if c == 0 && n.Ullman != 0 {
 		fmt.Fprintf(&buf, " u(%d)", n.Ullman)
@@ -308,11 +326,11 @@
 }
 
 // Fmt "%V": Values
-func Vconv(v Val, flag int) string {
+func Vconv(v Val, flag FmtFlag) string {
 	switch v.Ctype() {
 	case CTINT:
-		if (flag&obj.FmtSharp != 0) || fmtmode == FExp {
-			return Bconv(v.U.(*Mpint), obj.FmtSharp)
+		if (flag&FmtSharp != 0) || fmtmode == FExp {
+			return Bconv(v.U.(*Mpint), FmtSharp)
 		}
 		return Bconv(v.U.(*Mpint), 0)
 
@@ -330,25 +348,25 @@
 		return fmt.Sprintf("('\\x00' + %v)", v.U.(*Mpint))
 
 	case CTFLT:
-		if (flag&obj.FmtSharp != 0) || fmtmode == FExp {
+		if (flag&FmtSharp != 0) || fmtmode == FExp {
 			return Fconv(v.U.(*Mpflt), 0)
 		}
-		return Fconv(v.U.(*Mpflt), obj.FmtSharp)
+		return Fconv(v.U.(*Mpflt), FmtSharp)
 
 	case CTCPLX:
-		if (flag&obj.FmtSharp != 0) || fmtmode == FExp {
+		if (flag&FmtSharp != 0) || fmtmode == FExp {
 			return fmt.Sprintf("(%v+%vi)", &v.U.(*Mpcplx).Real, &v.U.(*Mpcplx).Imag)
 		}
 		if mpcmpfltc(&v.U.(*Mpcplx).Real, 0) == 0 {
-			return fmt.Sprintf("%vi", Fconv(&v.U.(*Mpcplx).Imag, obj.FmtSharp))
+			return fmt.Sprintf("%vi", Fconv(&v.U.(*Mpcplx).Imag, FmtSharp))
 		}
 		if mpcmpfltc(&v.U.(*Mpcplx).Imag, 0) == 0 {
-			return Fconv(&v.U.(*Mpcplx).Real, obj.FmtSharp)
+			return Fconv(&v.U.(*Mpcplx).Real, FmtSharp)
 		}
 		if mpcmpfltc(&v.U.(*Mpcplx).Imag, 0) < 0 {
-			return fmt.Sprintf("(%v%vi)", Fconv(&v.U.(*Mpcplx).Real, obj.FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, obj.FmtSharp))
+			return fmt.Sprintf("(%v%vi)", Fconv(&v.U.(*Mpcplx).Real, FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, FmtSharp))
 		}
-		return fmt.Sprintf("(%v+%vi)", Fconv(&v.U.(*Mpcplx).Real, obj.FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, obj.FmtSharp))
+		return fmt.Sprintf("(%v+%vi)", Fconv(&v.U.(*Mpcplx).Real, FmtSharp), Fconv(&v.U.(*Mpcplx).Imag, FmtSharp))
 
 	case CTSTR:
 		return strconv.Quote(v.U.(string))
@@ -415,8 +433,8 @@
 }
 
 // Fmt "%S": syms
-func symfmt(s *Sym, flag int) string {
-	if s.Pkg != nil && flag&obj.FmtShort == 0 {
+func symfmt(s *Sym, flag FmtFlag) string {
+	if s.Pkg != nil && flag&FmtShort == 0 {
 		switch fmtmode {
 		case FErr: // This is for the user
 			if s.Pkg == builtinpkg || s.Pkg == localpkg {
@@ -433,7 +451,7 @@
 			return fmt.Sprintf("%s.%s", s.Pkg.Name, s.Name)
 
 		case FTypeId:
-			if flag&obj.FmtUnsigned != 0 {
+			if flag&FmtUnsigned != 0 {
 				return fmt.Sprintf("%s.%s", s.Pkg.Name, s.Name) // dcommontype, typehash
 			}
 			return fmt.Sprintf("%s.%s", s.Pkg.Prefix, s.Name) // (methodsym), typesym, weaksym
@@ -448,7 +466,7 @@
 		}
 	}
 
-	if flag&obj.FmtByte != 0 {
+	if flag&FmtByte != 0 {
 		// FmtByte (hh) implies FmtShort (h)
 		// skip leading "type." in method name
 		p := s.Name
@@ -491,7 +509,7 @@
 	TBLANK:      "blank",
 }
 
-func typefmt(t *Type, flag int) string {
+func typefmt(t *Type, flag FmtFlag) string {
 	if t == nil {
 		return "<T>"
 	}
@@ -499,7 +517,7 @@
 	if t == bytetype || t == runetype {
 		// in %-T mode collapse rune and byte with their originals.
 		if fmtmode != FTypeId {
-			return Sconv(t.Sym, obj.FmtShort)
+			return Sconv(t.Sym, FmtShort)
 		}
 		t = Types[t.Etype]
 	}
@@ -509,18 +527,18 @@
 	}
 
 	// Unless the 'l' flag was specified, if the type has a name, just print that name.
-	if flag&obj.FmtLong == 0 && t.Sym != nil && t != Types[t.Etype] {
+	if flag&FmtLong == 0 && t.Sym != nil && t != Types[t.Etype] {
 		switch fmtmode {
 		case FTypeId:
-			if flag&obj.FmtShort != 0 {
+			if flag&FmtShort != 0 {
 				if t.Vargen != 0 {
-					return fmt.Sprintf("%v·%d", Sconv(t.Sym, obj.FmtShort), t.Vargen)
+					return fmt.Sprintf("%v·%d", Sconv(t.Sym, FmtShort), t.Vargen)
 				}
-				return Sconv(t.Sym, obj.FmtShort)
+				return Sconv(t.Sym, FmtShort)
 			}
 
-			if flag&obj.FmtUnsigned != 0 {
-				return Sconv(t.Sym, obj.FmtUnsigned)
+			if flag&FmtUnsigned != 0 {
+				return Sconv(t.Sym, FmtUnsigned)
 			}
 			fallthrough
 
@@ -550,8 +568,8 @@
 
 	switch t.Etype {
 	case TPTR32, TPTR64:
-		if fmtmode == FTypeId && (flag&obj.FmtShort != 0) {
-			return fmt.Sprintf("*%v", Tconv(t.Type, obj.FmtShort))
+		if fmtmode == FTypeId && (flag&FmtShort != 0) {
+			return fmt.Sprintf("*%v", Tconv(t.Type, FmtShort))
 		}
 		return fmt.Sprintf("*%v", t.Type)
 
@@ -592,11 +610,11 @@
 				// Wrong interface definitions may have types lacking a symbol.
 				break
 			case exportname(t1.Sym.Name):
-				buf.WriteString(Sconv(t1.Sym, obj.FmtShort))
+				buf.WriteString(Sconv(t1.Sym, FmtShort))
 			default:
-				buf.WriteString(Sconv(t1.Sym, obj.FmtUnsigned))
+				buf.WriteString(Sconv(t1.Sym, FmtUnsigned))
 			}
-			buf.WriteString(Tconv(t1.Type, obj.FmtShort))
+			buf.WriteString(Tconv(t1.Type, FmtShort))
 			if t1.Down != nil {
 				buf.WriteString(";")
 			}
@@ -609,7 +627,7 @@
 
 	case TFUNC:
 		var buf bytes.Buffer
-		if flag&obj.FmtShort != 0 {
+		if flag&FmtShort != 0 {
 			// no leading func
 		} else {
 			if t.Thistuple != 0 {
@@ -663,7 +681,7 @@
 			buf.WriteString("(")
 			if fmtmode == FTypeId || fmtmode == FErr { // no argument names on function signature, and no "noescape"/"nosplit" tags
 				for t1, it := IterFields(t); t1 != nil; t1 = it.Next() {
-					buf.WriteString(Fldconv(t1, obj.FmtShort))
+					buf.WriteString(Fldconv(t1, FmtShort))
 					if t1.Down != nil {
 						buf.WriteString(", ")
 					}
@@ -681,7 +699,7 @@
 			buf.WriteString("struct {")
 			for t1, it := IterFields(t); t1 != nil; t1 = it.Next() {
 				buf.WriteString(" ")
-				buf.WriteString(Fldconv(t1, obj.FmtLong))
+				buf.WriteString(Fldconv(t1, FmtLong))
 				if t1.Down != nil {
 					buf.WriteString(";")
 				}
@@ -792,20 +810,20 @@
 			break
 		}
 
-		f += fmt.Sprintf("%v %v= %v", n.Left, Oconv(Op(n.Etype), obj.FmtSharp), n.Right)
+		f += fmt.Sprintf("%v %v= %v", n.Left, Oconv(Op(n.Etype), FmtSharp), n.Right)
 
 	case OAS2:
 		if n.Colas && !complexinit {
-			f += fmt.Sprintf("%v := %v", Hconv(n.List, obj.FmtComma), Hconv(n.Rlist, obj.FmtComma))
+			f += fmt.Sprintf("%v := %v", Hconv(n.List, FmtComma), Hconv(n.Rlist, FmtComma))
 			break
 		}
 		fallthrough
 
 	case OAS2DOTTYPE, OAS2FUNC, OAS2MAPR, OAS2RECV:
-		f += fmt.Sprintf("%v = %v", Hconv(n.List, obj.FmtComma), Hconv(n.Rlist, obj.FmtComma))
+		f += fmt.Sprintf("%v = %v", Hconv(n.List, FmtComma), Hconv(n.Rlist, FmtComma))
 
 	case ORETURN:
-		f += fmt.Sprintf("return %v", Hconv(n.List, obj.FmtComma))
+		f += fmt.Sprintf("return %v", Hconv(n.List, FmtComma))
 
 	case ORETJMP:
 		f += fmt.Sprintf("retjmp %v", n.Sym)
@@ -862,7 +880,7 @@
 			break
 		}
 
-		f += fmt.Sprintf("for %v = range %v { %v }", Hconv(n.List, obj.FmtComma), n.Right, n.Nbody)
+		f += fmt.Sprintf("for %v = range %v { %v }", Hconv(n.List, FmtComma), n.Right, n.Nbody)
 
 	case OSELECT, OSWITCH:
 		if fmtmode == FErr {
@@ -870,7 +888,7 @@
 			break
 		}
 
-		f += Oconv(n.Op, obj.FmtSharp)
+		f += Oconv(n.Op, FmtSharp)
 		if simpleinit {
 			f += fmt.Sprintf(" %v;", n.Ninit.First())
 		}
@@ -882,7 +900,7 @@
 
 	case OCASE, OXCASE:
 		if n.List.Len() != 0 {
-			f += fmt.Sprintf("case %v: %v", Hconv(n.List, obj.FmtComma), n.Nbody)
+			f += fmt.Sprintf("case %v: %v", Hconv(n.List, FmtComma), n.Nbody)
 		} else {
 			f += fmt.Sprintf("default: %v", n.Nbody)
 		}
@@ -893,9 +911,9 @@
 		OFALL,
 		OXFALL:
 		if n.Left != nil {
-			f += fmt.Sprintf("%v %v", Oconv(n.Op, obj.FmtSharp), n.Left)
+			f += fmt.Sprintf("%v %v", Oconv(n.Op, FmtSharp), n.Left)
 		} else {
-			f += Oconv(n.Op, obj.FmtSharp)
+			f += Oconv(n.Op, FmtSharp)
 		}
 
 	case OEMPTY:
@@ -1094,9 +1112,9 @@
 		// These nodes have the special property that they are names with a left OTYPE and a right ONAME.
 		if fmtmode == FExp && n.Left != nil && n.Left.Op == OTYPE && n.Right != nil && n.Right.Op == ONAME {
 			if Isptr[n.Left.Type.Etype] {
-				return fmt.Sprintf("(%v).%v", n.Left.Type, Sconv(n.Right.Sym, obj.FmtShort|obj.FmtByte))
+				return fmt.Sprintf("(%v).%v", n.Left.Type, Sconv(n.Right.Sym, FmtShort|FmtByte))
 			} else {
-				return fmt.Sprintf("%v.%v", n.Left.Type, Sconv(n.Right.Sym, obj.FmtShort|obj.FmtByte))
+				return fmt.Sprintf("%v.%v", n.Left.Type, Sconv(n.Right.Sym, FmtShort|FmtByte))
 			}
 		}
 		fallthrough
@@ -1171,10 +1189,10 @@
 
 		if fmtmode == FExp && ptrlit {
 			// typecheck has overwritten OIND by OTYPE with pointer type.
-			return fmt.Sprintf("(&%v{ %v })", n.Right.Type.Type, Hconv(n.List, obj.FmtComma))
+			return fmt.Sprintf("(&%v{ %v })", n.Right.Type.Type, Hconv(n.List, FmtComma))
 		}
 
-		return fmt.Sprintf("(%v{ %v })", n.Right, Hconv(n.List, obj.FmtComma))
+		return fmt.Sprintf("(%v{ %v })", n.Right, Hconv(n.List, FmtComma))
 
 	case OPTRLIT:
 		if fmtmode == FExp && n.Left.Implicit {
@@ -1191,7 +1209,7 @@
 				f += fmt.Sprintf("(%v{", n.Type)
 			}
 			for i1, n1 := range n.List.Slice() {
-				f += fmt.Sprintf(" %v:%v", Sconv(n1.Left.Sym, obj.FmtShort|obj.FmtByte), n1.Right)
+				f += fmt.Sprintf(" %v:%v", Sconv(n1.Left.Sym, FmtShort|FmtByte), n1.Right)
 
 				if i1+1 < n.List.Len() {
 					f += ","
@@ -1214,15 +1232,15 @@
 			return fmt.Sprintf("%v literal", n.Type)
 		}
 		if fmtmode == FExp && n.Implicit {
-			return fmt.Sprintf("{ %v }", Hconv(n.List, obj.FmtComma))
+			return fmt.Sprintf("{ %v }", Hconv(n.List, FmtComma))
 		}
-		return fmt.Sprintf("(%v{ %v })", n.Type, Hconv(n.List, obj.FmtComma))
+		return fmt.Sprintf("(%v{ %v })", n.Type, Hconv(n.List, FmtComma))
 
 	case OKEY:
 		if n.Left != nil && n.Right != nil {
 			if fmtmode == FExp && n.Left.Type == structkey {
 				// requires special handling of field names
-				return fmt.Sprintf("%v:%v", Sconv(n.Left.Sym, obj.FmtShort|obj.FmtByte), n.Right)
+				return fmt.Sprintf("%v:%v", Sconv(n.Left.Sym, FmtShort|FmtByte), n.Right)
 			} else {
 				return fmt.Sprintf("%v:%v", n.Left, n.Right)
 			}
@@ -1248,7 +1266,7 @@
 			f += ".<nil>"
 			return f
 		}
-		f += fmt.Sprintf(".%v", Sconv(n.Right.Sym, obj.FmtShort|obj.FmtByte))
+		f += fmt.Sprintf(".%v", Sconv(n.Right.Sym, FmtShort|FmtByte))
 		return f
 
 	case ODOTTYPE, ODOTTYPE2:
@@ -1274,7 +1292,7 @@
 		return f
 
 	case OCOPY, OCOMPLEX:
-		return fmt.Sprintf("%v(%v, %v)", Oconv(n.Op, obj.FmtSharp), n.Left, n.Right)
+		return fmt.Sprintf("%v(%v, %v)", Oconv(n.Op, FmtSharp), n.Left, n.Right)
 
 	case OCONV,
 		OCONVIFACE,
@@ -1290,7 +1308,7 @@
 		if n.Left != nil {
 			return fmt.Sprintf("%v(%v)", n.Type, n.Left)
 		}
-		return fmt.Sprintf("%v(%v)", n.Type, Hconv(n.List, obj.FmtComma))
+		return fmt.Sprintf("%v(%v)", n.Type, Hconv(n.List, FmtComma))
 
 	case OREAL,
 		OIMAG,
@@ -1306,26 +1324,26 @@
 		OPRINT,
 		OPRINTN:
 		if n.Left != nil {
-			return fmt.Sprintf("%v(%v)", Oconv(n.Op, obj.FmtSharp), n.Left)
+			return fmt.Sprintf("%v(%v)", Oconv(n.Op, FmtSharp), n.Left)
 		}
 		if n.Isddd {
-			return fmt.Sprintf("%v(%v...)", Oconv(n.Op, obj.FmtSharp), Hconv(n.List, obj.FmtComma))
+			return fmt.Sprintf("%v(%v...)", Oconv(n.Op, FmtSharp), Hconv(n.List, FmtComma))
 		}
-		return fmt.Sprintf("%v(%v)", Oconv(n.Op, obj.FmtSharp), Hconv(n.List, obj.FmtComma))
+		return fmt.Sprintf("%v(%v)", Oconv(n.Op, FmtSharp), Hconv(n.List, FmtComma))
 
 	case OCALL, OCALLFUNC, OCALLINTER, OCALLMETH, OGETG:
 		var f string
 		f += exprfmt(n.Left, nprec)
 		if n.Isddd {
-			f += fmt.Sprintf("(%v...)", Hconv(n.List, obj.FmtComma))
+			f += fmt.Sprintf("(%v...)", Hconv(n.List, FmtComma))
 			return f
 		}
-		f += fmt.Sprintf("(%v)", Hconv(n.List, obj.FmtComma))
+		f += fmt.Sprintf("(%v)", Hconv(n.List, FmtComma))
 		return f
 
 	case OMAKEMAP, OMAKECHAN, OMAKESLICE:
 		if n.List.Len() != 0 { // pre-typecheck
-			return fmt.Sprintf("make(%v, %v)", n.Type, Hconv(n.List, obj.FmtComma))
+			return fmt.Sprintf("make(%v, %v)", n.Type, Hconv(n.List, FmtComma))
 		}
 		if n.Right != nil {
 			return fmt.Sprintf("make(%v, %v, %v)", n.Type, n.Left, n.Right)
@@ -1345,9 +1363,9 @@
 		ORECV:
 		var f string
 		if n.Left.Op == n.Op {
-			f += fmt.Sprintf("%v ", Oconv(n.Op, obj.FmtSharp))
+			f += fmt.Sprintf("%v ", Oconv(n.Op, FmtSharp))
 		} else {
-			f += Oconv(n.Op, obj.FmtSharp)
+			f += Oconv(n.Op, FmtSharp)
 		}
 		f += exprfmt(n.Left, nprec+1)
 		return f
@@ -1376,7 +1394,7 @@
 		var f string
 		f += exprfmt(n.Left, nprec)
 
-		f += fmt.Sprintf(" %v ", Oconv(n.Op, obj.FmtSharp))
+		f += fmt.Sprintf(" %v ", Oconv(n.Op, FmtSharp))
 		f += exprfmt(n.Right, nprec+1)
 		return f
 
@@ -1397,7 +1415,7 @@
 		var f string
 		f += exprfmt(n.Left, nprec)
 		// TODO(marvin): Fix Node.EType type union.
-		f += fmt.Sprintf(" %v ", Oconv(Op(n.Etype), obj.FmtSharp))
+		f += fmt.Sprintf(" %v ", Oconv(Op(n.Etype), FmtSharp))
 		f += exprfmt(n.Right, nprec+1)
 		return f
 	}
@@ -1405,7 +1423,7 @@
 	return fmt.Sprintf("<node %v>", Oconv(n.Op, 0))
 }
 
-func nodefmt(n *Node, flag int) string {
+func nodefmt(n *Node, flag FmtFlag) string {
 	t := n.Type
 
 	// we almost always want the original, except in export mode for literals
@@ -1415,7 +1433,7 @@
 		n = n.Orig
 	}
 
-	if flag&obj.FmtLong != 0 && t != nil {
+	if flag&FmtLong != 0 && t != nil {
 		if t.Etype == TNIL {
 			return "nil"
 		} else {
@@ -1441,12 +1459,12 @@
 	}
 }
 
-func nodedump(n *Node, flag int) string {
+func nodedump(n *Node, flag FmtFlag) string {
 	if n == nil {
 		return ""
 	}
 
-	recur := flag&obj.FmtShort == 0
+	recur := flag&FmtShort == 0
 
 	var buf bytes.Buffer
 	if recur {
@@ -1534,8 +1552,8 @@
 
 // Fmt "%S": syms
 // Flags:  "%hS" suppresses qualifying with package
-func Sconv(s *Sym, flag int) string {
-	if flag&obj.FmtLong != 0 {
+func Sconv(s *Sym, flag FmtFlag) string {
+	if flag&FmtLong != 0 {
 		panic("linksymfmt")
 	}
 
@@ -1560,7 +1578,7 @@
 	return Tconv(t, 0)
 }
 
-func Fldconv(f *Field, flag int) string {
+func Fldconv(f *Field, flag FmtFlag) string {
 	if f == nil {
 		return "<T>"
 	}
@@ -1568,15 +1586,15 @@
 	sf := flag
 	sm, sb := setfmode(&flag)
 
-	if fmtmode == FTypeId && (sf&obj.FmtUnsigned != 0) {
+	if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
 		fmtpkgpfx++
 	}
 	if fmtpkgpfx != 0 {
-		flag |= obj.FmtUnsigned
+		flag |= FmtUnsigned
 	}
 
 	var name string
-	if flag&obj.FmtShort == 0 {
+	if flag&FmtShort == 0 {
 		s := f.Sym
 
 		// Take the name from the original, lest we substituted it with ~r%d or ~b%d.
@@ -1599,8 +1617,8 @@
 		if s != nil && f.Embedded == 0 {
 			if f.Funarg {
 				name = Nconv(f.Nname, 0)
-			} else if flag&obj.FmtLong != 0 {
-				name = Sconv(s, obj.FmtShort|obj.FmtByte) // qualify non-exported names (used on structs, not on funarg)
+			} else if flag&FmtLong != 0 {
+				name = Sconv(s, FmtShort|FmtByte) // qualify non-exported names (used on structs, not on funarg)
 			} else {
 				name = Sconv(s, 0)
 			}
@@ -1635,11 +1653,11 @@
 	// (The escape analysis tags do not apply to func vars.)
 	// But it must not suppress struct field tags.
 	// See golang.org/issue/13777 and golang.org/issue/14331.
-	if flag&obj.FmtShort == 0 && (!fmtbody || !f.Funarg) && f.Note != nil {
+	if flag&FmtShort == 0 && (!fmtbody || !f.Funarg) && f.Note != nil {
 		str += " " + strconv.Quote(*f.Note)
 	}
 
-	if fmtmode == FTypeId && (sf&obj.FmtUnsigned != 0) {
+	if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
 		fmtpkgpfx--
 	}
 
@@ -1653,7 +1671,7 @@
 // Flags: 'l' print definition, not name
 //	  'h' omit 'func' and receiver from function types, short type names
 //	  'u' package name, not prefix (FTypeId mode, sticky)
-func Tconv(t *Type, flag int) string {
+func Tconv(t *Type, flag FmtFlag) string {
 	if t == nil {
 		return "<T>"
 	}
@@ -1666,16 +1684,16 @@
 	sf := flag
 	sm, sb := setfmode(&flag)
 
-	if fmtmode == FTypeId && (sf&obj.FmtUnsigned != 0) {
+	if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
 		fmtpkgpfx++
 	}
 	if fmtpkgpfx != 0 {
-		flag |= obj.FmtUnsigned
+		flag |= FmtUnsigned
 	}
 
 	str := typefmt(t, flag)
 
-	if fmtmode == FTypeId && (sf&obj.FmtUnsigned != 0) {
+	if fmtmode == FTypeId && (sf&FmtUnsigned != 0) {
 		fmtpkgpfx--
 	}
 
@@ -1693,7 +1711,7 @@
 // Fmt '%N': Nodes.
 // Flags: 'l' suffix with "(type %T)" where possible
 //	  '+h' in debug mode, don't recurse, no multiline output
-func Nconv(n *Node, flag int) string {
+func Nconv(n *Node, flag FmtFlag) string {
 	if n == nil {
 		return "<N>"
 	}
@@ -1726,7 +1744,7 @@
 
 // Fmt '%H': Nodes.
 // Flags: all those of %N plus ',': separate with comma's instead of semicolons.
-func Hconv(l Nodes, flag int) string {
+func Hconv(l Nodes, flag FmtFlag) string {
 	if l.Len() == 0 && fmtmode == FDbg {
 		return "<nil>"
 	}
@@ -1736,7 +1754,7 @@
 	sep := "; "
 	if fmtmode == FDbg {
 		sep = "\n"
-	} else if flag&obj.FmtComma != 0 {
+	} else if flag&FmtComma != 0 {
 		sep = ", "
 	}
 
@@ -1755,9 +1773,9 @@
 }
 
 func dumplist(s string, l Nodes) {
-	fmt.Printf("%s%v\n", s, Hconv(l, obj.FmtSign))
+	fmt.Printf("%s%v\n", s, Hconv(l, FmtSign))
 }
 
 func Dump(s string, n *Node) {
-	fmt.Printf("%s [%p]%v\n", s, n, Nconv(n, obj.FmtSign))
+	fmt.Printf("%s [%p]%v\n", s, n, Nconv(n, FmtSign))
 }
diff --git a/src/cmd/compile/internal/gc/gen.go b/src/cmd/compile/internal/gc/gen.go
index 8375318..2bae788 100644
--- a/src/cmd/compile/internal/gc/gen.go
+++ b/src/cmd/compile/internal/gc/gen.go
@@ -638,7 +638,7 @@
 
 	switch n.Op {
 	default:
-		Fatalf("gen: unknown op %v", Nconv(n, obj.FmtShort|obj.FmtSign))
+		Fatalf("gen: unknown op %v", Nconv(n, FmtShort|FmtSign))
 
 	case OCASE,
 		OFALL,
diff --git a/src/cmd/compile/internal/gc/gsubr.go b/src/cmd/compile/internal/gc/gsubr.go
index e1217ce..efc48c7 100644
--- a/src/cmd/compile/internal/gc/gsubr.go
+++ b/src/cmd/compile/internal/gc/gsubr.go
@@ -425,7 +425,7 @@
 		}
 		switch n.Val().Ctype() {
 		default:
-			Fatalf("naddr: const %v", Tconv(n.Type, obj.FmtLong))
+			Fatalf("naddr: const %v", Tconv(n.Type, FmtLong))
 
 		case CTFLT:
 			a.Type = obj.TYPE_FCONST
diff --git a/src/cmd/compile/internal/gc/inl.go b/src/cmd/compile/internal/gc/inl.go
index 984d61b..82e165e 100644
--- a/src/cmd/compile/internal/gc/inl.go
+++ b/src/cmd/compile/internal/gc/inl.go
@@ -28,7 +28,6 @@
 package gc
 
 import (
-	"cmd/internal/obj"
 	"fmt"
 )
 
@@ -43,7 +42,7 @@
 			rcvr = rcvr.Type
 		}
 		if rcvr.Sym == nil {
-			Fatalf("receiver with no sym: [%v] %v  (%v)", fn.Sym, Nconv(fn, obj.FmtLong), rcvr)
+			Fatalf("receiver with no sym: [%v] %v  (%v)", fn.Sym, Nconv(fn, FmtLong), rcvr)
 		}
 		return rcvr.Sym.Pkg
 	}
@@ -68,7 +67,7 @@
 	}
 
 	if Debug['m'] > 2 {
-		fmt.Printf("typecheck import [%v] %v { %v }\n", fn.Sym, Nconv(fn, obj.FmtLong), Hconv(fn.Func.Inl, obj.FmtSharp))
+		fmt.Printf("typecheck import [%v] %v { %v }\n", fn.Sym, Nconv(fn, FmtLong), Hconv(fn.Func.Inl, FmtSharp))
 	}
 
 	save_safemode := safemode
@@ -92,7 +91,7 @@
 		Fatalf("caninl %v", fn)
 	}
 	if fn.Func.Nname == nil {
-		Fatalf("caninl no nname %v", Nconv(fn, obj.FmtSign))
+		Fatalf("caninl no nname %v", Nconv(fn, FmtSign))
 	}
 
 	// If marked "go:noinline", don't inline
@@ -148,7 +147,7 @@
 	fn.Type.Nname = fn.Func.Nname
 
 	if Debug['m'] > 1 {
-		fmt.Printf("%v: can inline %v as: %v { %v }\n", fn.Line(), Nconv(fn.Func.Nname, obj.FmtSharp), Tconv(fn.Type, obj.FmtSharp), Hconv(fn.Func.Nname.Func.Inl, obj.FmtSharp))
+		fmt.Printf("%v: can inline %v as: %v { %v }\n", fn.Line(), Nconv(fn.Func.Nname, FmtSharp), Tconv(fn.Type, FmtSharp), Hconv(fn.Func.Nname.Func.Inl, FmtSharp))
 	} else if Debug['m'] != 0 {
 		fmt.Printf("%v: can inline %v\n", fn.Line(), fn.Func.Nname)
 	}
@@ -191,10 +190,10 @@
 	// Call is okay if inlinable and we have the budget for the body.
 	case OCALLMETH:
 		if n.Left.Type == nil {
-			Fatalf("no function type for [%p] %v\n", n.Left, Nconv(n.Left, obj.FmtSign))
+			Fatalf("no function type for [%p] %v\n", n.Left, Nconv(n.Left, FmtSign))
 		}
 		if n.Left.Type.Nname == nil {
-			Fatalf("no function definition for [%p] %v\n", n.Left.Type, Tconv(n.Left.Type, obj.FmtSign))
+			Fatalf("no function definition for [%p] %v\n", n.Left.Type, Tconv(n.Left.Type, FmtSign))
 		}
 		if len(n.Left.Type.Nname.Func.Inl.Slice()) != 0 {
 			*budget -= int(n.Left.Type.Nname.Func.InlCost)
@@ -303,7 +302,7 @@
 // statements.
 func inlconv2list(n *Node) []*Node {
 	if n.Op != OINLCALL || n.Rlist.Len() == 0 {
-		Fatalf("inlconv2list %v\n", Nconv(n, obj.FmtSign))
+		Fatalf("inlconv2list %v\n", Nconv(n, FmtSign))
 	}
 
 	s := n.Rlist.Slice()
@@ -453,7 +452,7 @@
 	switch n.Op {
 	case OCALLFUNC:
 		if Debug['m'] > 3 {
-			fmt.Printf("%v:call to func %v\n", n.Line(), Nconv(n.Left, obj.FmtSign))
+			fmt.Printf("%v:call to func %v\n", n.Line(), Nconv(n.Left, FmtSign))
 		}
 		if n.Left.Func != nil && len(n.Left.Func.Inl.Slice()) != 0 { // normal case
 			mkinlcall(np, n.Left, n.Isddd)
@@ -465,16 +464,16 @@
 
 	case OCALLMETH:
 		if Debug['m'] > 3 {
-			fmt.Printf("%v:call to meth %v\n", n.Line(), Nconv(n.Left.Right, obj.FmtLong))
+			fmt.Printf("%v:call to meth %v\n", n.Line(), Nconv(n.Left.Right, FmtLong))
 		}
 
 		// typecheck should have resolved ODOTMETH->type, whose nname points to the actual function.
 		if n.Left.Type == nil {
-			Fatalf("no function type for [%p] %v\n", n.Left, Nconv(n.Left, obj.FmtSign))
+			Fatalf("no function type for [%p] %v\n", n.Left, Nconv(n.Left, FmtSign))
 		}
 
 		if n.Left.Type.Nname == nil {
-			Fatalf("no function definition for [%p] %v\n", n.Left.Type, Tconv(n.Left.Type, obj.FmtSign))
+			Fatalf("no function definition for [%p] %v\n", n.Left.Type, Tconv(n.Left.Type, FmtSign))
 		}
 
 		mkinlcall(np, n.Left.Type.Nname, n.Isddd)
@@ -533,13 +532,13 @@
 
 	// Bingo, we have a function node, and it has an inlineable body
 	if Debug['m'] > 1 {
-		fmt.Printf("%v: inlining call to %v %v { %v }\n", n.Line(), fn.Sym, Tconv(fn.Type, obj.FmtSharp), Hconv(fn.Func.Inl, obj.FmtSharp))
+		fmt.Printf("%v: inlining call to %v %v { %v }\n", n.Line(), fn.Sym, Tconv(fn.Type, FmtSharp), Hconv(fn.Func.Inl, FmtSharp))
 	} else if Debug['m'] != 0 {
 		fmt.Printf("%v: inlining call to %v\n", n.Line(), fn)
 	}
 
 	if Debug['m'] > 2 {
-		fmt.Printf("%v: Before inlining: %v\n", n.Line(), Nconv(n, obj.FmtSign))
+		fmt.Printf("%v: Before inlining: %v\n", n.Line(), Nconv(n, FmtSign))
 	}
 
 	ninit := n.Ninit
@@ -601,10 +600,10 @@
 			Fatalf("missing inlvar for %v\n", t.Nname)
 		}
 		if n.Left.Left == nil {
-			Fatalf("method call without receiver: %v", Nconv(n, obj.FmtSign))
+			Fatalf("method call without receiver: %v", Nconv(n, FmtSign))
 		}
 		if t == nil {
-			Fatalf("method call unknown receiver type: %v", Nconv(n, obj.FmtSign))
+			Fatalf("method call unknown receiver type: %v", Nconv(n, FmtSign))
 		}
 		as := Nod(OAS, tinlvar(t), n.Left.Left)
 		if as != nil {
@@ -660,7 +659,7 @@
 	if fn.Type.Thistuple != 0 && n.Left.Op != ODOTMETH {
 		// non-method call to method
 		if n.List.Len() == 0 {
-			Fatalf("non-method call to method without first arg: %v", Nconv(n, obj.FmtSign))
+			Fatalf("non-method call to method without first arg: %v", Nconv(n, FmtSign))
 		}
 
 		// append receiver inlvar to LHS.
@@ -670,7 +669,7 @@
 			Fatalf("missing inlvar for %v\n", t.Nname)
 		}
 		if t == nil {
-			Fatalf("method call unknown receiver type: %v", Nconv(n, obj.FmtSign))
+			Fatalf("method call unknown receiver type: %v", Nconv(n, FmtSign))
 		}
 		as.List.Append(tinlvar(t))
 		li++
@@ -730,7 +729,7 @@
 		}
 
 		if li < n.List.Len() || t != nil {
-			Fatalf("arg count mismatch: %v  vs %v\n", Tconv(fn.Type.Params(), obj.FmtSharp), Hconv(n.List, obj.FmtComma))
+			Fatalf("arg count mismatch: %v  vs %v\n", Tconv(fn.Type.Params(), FmtSharp), Hconv(n.List, FmtComma))
 		}
 	}
 
@@ -821,7 +820,7 @@
 	fn.Func.Inl.Set(body)
 
 	if Debug['m'] > 2 {
-		fmt.Printf("%v: After inlining %v\n\n", n.Line(), Nconv(*np, obj.FmtSign))
+		fmt.Printf("%v: After inlining %v\n\n", n.Line(), Nconv(*np, FmtSign))
 	}
 }
 
@@ -830,7 +829,7 @@
 // PPARAM's, PAUTOS and PPARAMOUTs of the called function.
 func inlvar(var_ *Node) *Node {
 	if Debug['m'] > 3 {
-		fmt.Printf("inlvar %v\n", Nconv(var_, obj.FmtSign))
+		fmt.Printf("inlvar %v\n", Nconv(var_, FmtSign))
 	}
 
 	n := newname(var_.Sym)
@@ -915,13 +914,13 @@
 	case ONAME:
 		if n.Name.Inlvar != nil { // These will be set during inlnode
 			if Debug['m'] > 2 {
-				fmt.Printf("substituting name %v  ->  %v\n", Nconv(n, obj.FmtSign), Nconv(n.Name.Inlvar, obj.FmtSign))
+				fmt.Printf("substituting name %v  ->  %v\n", Nconv(n, FmtSign), Nconv(n.Name.Inlvar, FmtSign))
 			}
 			return n.Name.Inlvar
 		}
 
 		if Debug['m'] > 2 {
-			fmt.Printf("not substituting name %v\n", Nconv(n, obj.FmtSign))
+			fmt.Printf("not substituting name %v\n", Nconv(n, FmtSign))
 		}
 		return n
 
@@ -971,7 +970,7 @@
 	m.Ninit.Set(nil)
 
 	if n.Op == OCLOSURE {
-		Fatalf("cannot inline function containing closure: %v", Nconv(n, obj.FmtSign))
+		Fatalf("cannot inline function containing closure: %v", Nconv(n, FmtSign))
 	}
 
 	m.Left = subst.node(n.Left)
diff --git a/src/cmd/compile/internal/gc/mpfloat.go b/src/cmd/compile/internal/gc/mpfloat.go
index 48aa1ef..4afd7e6 100644
--- a/src/cmd/compile/internal/gc/mpfloat.go
+++ b/src/cmd/compile/internal/gc/mpfloat.go
@@ -6,7 +6,6 @@
 
 import (
 	"cmd/compile/internal/big"
-	"cmd/internal/obj"
 	"fmt"
 	"math"
 )
@@ -209,8 +208,8 @@
 	return Fconv(f, 0)
 }
 
-func Fconv(fvp *Mpflt, flag int) string {
-	if flag&obj.FmtSharp == 0 {
+func Fconv(fvp *Mpflt, flag FmtFlag) string {
+	if flag&FmtSharp == 0 {
 		return fvp.Val.Text('b', 0)
 	}
 
@@ -222,7 +221,7 @@
 	if f.Sign() < 0 {
 		sign = "-"
 		f = new(big.Float).Abs(f)
-	} else if flag&obj.FmtSign != 0 {
+	} else if flag&FmtSign != 0 {
 		sign = "+"
 	}
 
diff --git a/src/cmd/compile/internal/gc/mpint.go b/src/cmd/compile/internal/gc/mpint.go
index c2f1884..3853097 100644
--- a/src/cmd/compile/internal/gc/mpint.go
+++ b/src/cmd/compile/internal/gc/mpint.go
@@ -6,7 +6,6 @@
 
 import (
 	"cmd/compile/internal/big"
-	"cmd/internal/obj"
 	"fmt"
 )
 
@@ -309,8 +308,8 @@
 	return Bconv(x, 0)
 }
 
-func Bconv(xval *Mpint, flag int) string {
-	if flag&obj.FmtSharp != 0 {
+func Bconv(xval *Mpint, flag FmtFlag) string {
+	if flag&FmtSharp != 0 {
 		return fmt.Sprintf("%#x", &xval.Val)
 	}
 	return xval.Val.String()
diff --git a/src/cmd/compile/internal/gc/pgen.go b/src/cmd/compile/internal/gc/pgen.go
index d138e10..d5145de 100644
--- a/src/cmd/compile/internal/gc/pgen.go
+++ b/src/cmd/compile/internal/gc/pgen.go
@@ -90,7 +90,7 @@
 		Fatalf("gvardef nil")
 	}
 	if n.Op != ONAME {
-		Yyerror("gvardef %v; %v", Oconv(n.Op, obj.FmtSharp), n)
+		Yyerror("gvardef %v; %v", Oconv(n.Op, FmtSharp), n)
 		return
 	}
 
diff --git a/src/cmd/compile/internal/gc/plive.go b/src/cmd/compile/internal/gc/plive.go
index 47987b4..f7f5112 100644
--- a/src/cmd/compile/internal/gc/plive.go
+++ b/src/cmd/compile/internal/gc/plive.go
@@ -1241,7 +1241,7 @@
 						if !n.Name.Needzero {
 							n.Name.Needzero = true
 							if debuglive >= 1 {
-								Warnl(p.Lineno, "%v: %v is ambiguously live", Curfn.Func.Nname, Nconv(n, obj.FmtLong))
+								Warnl(p.Lineno, "%v: %v is ambiguously live", Curfn.Func.Nname, Nconv(n, FmtLong))
 							}
 
 							// Record in 'ambiguous' bitmap.
@@ -1337,7 +1337,7 @@
 						}
 						n := lv.vars[j]
 						if n.Class != PPARAM {
-							yyerrorl(p.Lineno, "internal error: %v %v recorded as live on entry, p.Pc=%v", Curfn.Func.Nname, Nconv(n, obj.FmtLong), p.Pc)
+							yyerrorl(p.Lineno, "internal error: %v %v recorded as live on entry, p.Pc=%v", Curfn.Func.Nname, Nconv(n, FmtLong), p.Pc)
 						}
 					}
 				}
diff --git a/src/cmd/compile/internal/gc/popt.go b/src/cmd/compile/internal/gc/popt.go
index 64136e0..41f8ba9 100644
--- a/src/cmd/compile/internal/gc/popt.go
+++ b/src/cmd/compile/internal/gc/popt.go
@@ -718,7 +718,7 @@
 	nfree := len(bystart)
 	for _, v := range bystart {
 		if debugmerge > 0 && Debug['v'] != 0 {
-			fmt.Printf("consider %v: removed=%t\n", Nconv(v.node, obj.FmtSharp), v.removed)
+			fmt.Printf("consider %v: removed=%t\n", Nconv(v.node, FmtSharp), v.removed)
 		}
 
 		if v.removed {
@@ -733,7 +733,7 @@
 		}
 
 		if debugmerge > 0 && Debug['v'] != 0 {
-			fmt.Printf("consider %v: removed=%t nfree=%d nvar=%d\n", Nconv(v.node, obj.FmtSharp), v.removed, nfree, len(bystart))
+			fmt.Printf("consider %v: removed=%t nfree=%d nvar=%d\n", Nconv(v.node, FmtSharp), v.removed, nfree, len(bystart))
 		}
 
 		// Find old temp to reuse if possible.
@@ -742,7 +742,7 @@
 		for j := nfree; j < len(inuse); j++ {
 			v1 := inuse[j]
 			if debugmerge > 0 && Debug['v'] != 0 {
-				fmt.Printf("consider %v: maybe %v: type=%v,%v addrtaken=%v,%v\n", Nconv(v.node, obj.FmtSharp), Nconv(v1.node, obj.FmtSharp), t, v1.node.Type, v.node.Addrtaken, v1.node.Addrtaken)
+				fmt.Printf("consider %v: maybe %v: type=%v,%v addrtaken=%v,%v\n", Nconv(v.node, FmtSharp), Nconv(v1.node, FmtSharp), t, v1.node.Type, v.node.Addrtaken, v1.node.Addrtaken)
 			}
 
 			// Require the types to match but also require the addrtaken bits to match.
@@ -778,7 +778,7 @@
 	if debugmerge > 0 && Debug['v'] != 0 {
 		fmt.Printf("%v [%d - %d]\n", Curfn.Func.Nname.Sym, len(vars), nkill)
 		for _, v := range vars {
-			fmt.Printf("var %v %v %d-%d", Nconv(v.node, obj.FmtSharp), v.node.Type, v.start, v.end)
+			fmt.Printf("var %v %v %d-%d", Nconv(v.node, FmtSharp), v.node.Type, v.start, v.end)
 			if v.addr {
 				fmt.Printf(" addr=true")
 			}
@@ -786,7 +786,7 @@
 				fmt.Printf(" removed=true")
 			}
 			if v.merge != nil {
-				fmt.Printf(" merge %v", Nconv(v.merge.node, obj.FmtSharp))
+				fmt.Printf(" merge %v", Nconv(v.merge.node, FmtSharp))
 			}
 			if v.start == v.end && v.def != nil {
 				fmt.Printf(" %v", v.def.Prog)
diff --git a/src/cmd/compile/internal/gc/range.go b/src/cmd/compile/internal/gc/range.go
index 1459b7a..28c6896 100644
--- a/src/cmd/compile/internal/gc/range.go
+++ b/src/cmd/compile/internal/gc/range.go
@@ -4,8 +4,6 @@
 
 package gc
 
-import "cmd/internal/obj"
-
 // range
 func typecheckrange(n *Node) {
 	var toomany int
@@ -48,7 +46,7 @@
 	toomany = 0
 	switch t.Etype {
 	default:
-		Yyerror("cannot range over %v", Nconv(n.Right, obj.FmtLong))
+		Yyerror("cannot range over %v", Nconv(n.Right, FmtLong))
 		goto out
 
 	case TARRAY:
@@ -104,7 +102,7 @@
 		if v1.Name != nil && v1.Name.Defn == n {
 			v1.Type = t1
 		} else if v1.Type != nil && assignop(t1, v1.Type, &why) == 0 {
-			Yyerror("cannot assign type %v to %v in range%s", t1, Nconv(v1, obj.FmtLong), why)
+			Yyerror("cannot assign type %v to %v in range%s", t1, Nconv(v1, FmtLong), why)
 		}
 		checkassign(n, v1)
 	}
@@ -113,7 +111,7 @@
 		if v2.Name != nil && v2.Name.Defn == n {
 			v2.Type = t2
 		} else if v2.Type != nil && assignop(t2, v2.Type, &why) == 0 {
-			Yyerror("cannot assign type %v to %v in range%s", t2, Nconv(v2, obj.FmtLong), why)
+			Yyerror("cannot assign type %v to %v in range%s", t2, Nconv(v2, FmtLong), why)
 		}
 		checkassign(n, v2)
 	}
diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go
index dda876d..e72fa4f 100644
--- a/src/cmd/compile/internal/gc/reflect.go
+++ b/src/cmd/compile/internal/gc/reflect.go
@@ -757,7 +757,7 @@
 	}
 	ot = dsymptr(s, ot, gcsym, 0) // gcdata
 
-	p := Tconv(t, obj.FmtLeft|obj.FmtUnsigned)
+	p := Tconv(t, FmtLeft|FmtUnsigned)
 
 	// If we're writing out type T,
 	// we are very likely to write out type *T as well.
@@ -777,13 +777,13 @@
 }
 
 func typesym(t *Type) *Sym {
-	return Pkglookup(Tconv(t, obj.FmtLeft), typepkg)
+	return Pkglookup(Tconv(t, FmtLeft), typepkg)
 }
 
 // tracksym returns the symbol for tracking use of field/method f, assumed
 // to be a member of struct/interface type t.
 func tracksym(t *Type, f *Field) *Sym {
-	return Pkglookup(Tconv(t, obj.FmtLeft)+"."+f.Sym.Name, trackpkg)
+	return Pkglookup(Tconv(t, FmtLeft)+"."+f.Sym.Name, trackpkg)
 }
 
 func typelinksym(t *Type) *Sym {
@@ -796,7 +796,7 @@
 	// ensure the types appear sorted by their string field. The
 	// names are a little long but they are discarded by the linker
 	// and do not end up in the symbol table of the final binary.
-	p := Tconv(t, obj.FmtLeft|obj.FmtUnsigned) + "\t" + Tconv(t, obj.FmtLeft)
+	p := Tconv(t, FmtLeft|FmtUnsigned) + "\t" + Tconv(t, FmtLeft)
 
 	s := Pkglookup(p, typelinkpkg)
 
@@ -806,7 +806,7 @@
 }
 
 func typesymprefix(prefix string, t *Type) *Sym {
-	p := prefix + "." + Tconv(t, obj.FmtLeft)
+	p := prefix + "." + Tconv(t, FmtLeft)
 	s := Pkglookup(p, typepkg)
 
 	//print("algsym: %s -> %+S\n", p, s);
diff --git a/src/cmd/compile/internal/gc/reg.go b/src/cmd/compile/internal/gc/reg.go
index 09cf7f5..39eaa28 100644
--- a/src/cmd/compile/internal/gc/reg.go
+++ b/src/cmd/compile/internal/gc/reg.go
@@ -392,10 +392,10 @@
 
 	if nvar >= NVAR {
 		if Debug['w'] > 1 && node != nil {
-			Fatalf("variable not optimized: %v", Nconv(node, obj.FmtSharp))
+			Fatalf("variable not optimized: %v", Nconv(node, FmtSharp))
 		}
 		if Debug['v'] > 0 {
-			Warn("variable not optimized: %v", Nconv(node, obj.FmtSharp))
+			Warn("variable not optimized: %v", Nconv(node, FmtSharp))
 		}
 
 		// If we're not tracking a word in a variable, mark the rest as
@@ -487,7 +487,7 @@
 	}
 
 	if Debug['R'] != 0 {
-		fmt.Printf("bit=%2d et=%v w=%d+%d %v %v flag=%d\n", i, Econv(et), o, w, Nconv(node, obj.FmtSharp), Ctxt.Dconv(a), v.addr)
+		fmt.Printf("bit=%2d et=%v w=%d+%d %v %v flag=%d\n", i, Econv(et), o, w, Nconv(node, FmtSharp), Ctxt.Dconv(a), v.addr)
 	}
 	Ostats.Nvar++
 
diff --git a/src/cmd/compile/internal/gc/sinit.go b/src/cmd/compile/internal/gc/sinit.go
index 914239f..ac93478 100644
--- a/src/cmd/compile/internal/gc/sinit.go
+++ b/src/cmd/compile/internal/gc/sinit.go
@@ -5,7 +5,6 @@
 package gc
 
 import (
-	"cmd/internal/obj"
 	"fmt"
 )
 
@@ -202,7 +201,7 @@
 	}
 
 	if n.Op == ONAME && n.Ninit.Len() != 0 {
-		Fatalf("name %v with ninit: %v\n", n.Sym, Nconv(n, obj.FmtSign))
+		Fatalf("name %v with ninit: %v\n", n.Sym, Nconv(n, FmtSign))
 	}
 
 	init1(n, out)
diff --git a/src/cmd/compile/internal/gc/subr.go b/src/cmd/compile/internal/gc/subr.go
index df9702a..88ca069 100644
--- a/src/cmd/compile/internal/gc/subr.go
+++ b/src/cmd/compile/internal/gc/subr.go
@@ -839,11 +839,11 @@
 			} else if have != nil && have.Sym == missing.Sym && have.Nointerface {
 				*why = fmt.Sprintf(":\n\t%v does not implement %v (%v method is marked 'nointerface')", src, dst, missing.Sym)
 			} else if have != nil && have.Sym == missing.Sym {
-				*why = fmt.Sprintf(":\n\t%v does not implement %v (wrong type for %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", src, dst, missing.Sym, have.Sym, Tconv(have.Type, obj.FmtShort|obj.FmtByte), missing.Sym, Tconv(missing.Type, obj.FmtShort|obj.FmtByte))
+				*why = fmt.Sprintf(":\n\t%v does not implement %v (wrong type for %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", src, dst, missing.Sym, have.Sym, Tconv(have.Type, FmtShort|FmtByte), missing.Sym, Tconv(missing.Type, FmtShort|FmtByte))
 			} else if ptr != 0 {
 				*why = fmt.Sprintf(":\n\t%v does not implement %v (%v method has pointer receiver)", src, dst, missing.Sym)
 			} else if have != nil {
-				*why = fmt.Sprintf(":\n\t%v does not implement %v (missing %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", src, dst, missing.Sym, have.Sym, Tconv(have.Type, obj.FmtShort|obj.FmtByte), missing.Sym, Tconv(missing.Type, obj.FmtShort|obj.FmtByte))
+				*why = fmt.Sprintf(":\n\t%v does not implement %v (missing %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", src, dst, missing.Sym, have.Sym, Tconv(have.Type, FmtShort|FmtByte), missing.Sym, Tconv(missing.Type, FmtShort|FmtByte))
 			} else {
 				*why = fmt.Sprintf(":\n\t%v does not implement %v (missing %v method)", src, dst, missing.Sym)
 			}
@@ -1047,7 +1047,7 @@
 	var why string
 	op := assignop(n.Type, t, &why)
 	if op == 0 {
-		Yyerror("cannot use %v as type %v in %s%s", Nconv(n, obj.FmtLong), t, context(), why)
+		Yyerror("cannot use %v as type %v in %s%s", Nconv(n, FmtLong), t, context(), why)
 		op = OCONV
 	}
 
@@ -1234,10 +1234,10 @@
 		// hide method receiver from Tpretty
 		t.Thistuple = 0
 
-		p = Tconv(t, obj.FmtLeft|obj.FmtUnsigned)
+		p = Tconv(t, FmtLeft|FmtUnsigned)
 		t.Thistuple = 1
 	} else {
-		p = Tconv(t, obj.FmtLeft|obj.FmtUnsigned)
+		p = Tconv(t, FmtLeft|FmtUnsigned)
 	}
 
 	//print("typehash: %s\n", p);
diff --git a/src/cmd/compile/internal/gc/swt.go b/src/cmd/compile/internal/gc/swt.go
index d87dc7c..2f07988 100644
--- a/src/cmd/compile/internal/gc/swt.go
+++ b/src/cmd/compile/internal/gc/swt.go
@@ -5,7 +5,6 @@
 package gc
 
 import (
-	"cmd/internal/obj"
 	"sort"
 	"strconv"
 )
@@ -71,7 +70,7 @@
 		typecheck(&n.Left.Right, Erv)
 		t = n.Left.Right.Type
 		if t != nil && t.Etype != TINTER {
-			Yyerror("cannot type switch on non-interface value %v", Nconv(n.Left.Right, obj.FmtLong))
+			Yyerror("cannot type switch on non-interface value %v", Nconv(n.Left.Right, FmtLong))
 		}
 	} else {
 		// expression switch
@@ -87,13 +86,13 @@
 			var badtype *Type
 			switch {
 			case !okforeq[t.Etype]:
-				Yyerror("cannot switch on %v", Nconv(n.Left, obj.FmtLong))
+				Yyerror("cannot switch on %v", Nconv(n.Left, FmtLong))
 			case t.Etype == TARRAY && !Isfixedarray(t):
 				nilonly = "slice"
 			case t.Etype == TARRAY && Isfixedarray(t) && algtype1(t, nil) == ANOEQ:
-				Yyerror("cannot switch on %v", Nconv(n.Left, obj.FmtLong))
+				Yyerror("cannot switch on %v", Nconv(n.Left, FmtLong))
 			case t.Etype == TSTRUCT && algtype1(t, &badtype) == ANOEQ:
-				Yyerror("cannot switch on %v (struct containing %v cannot be compared)", Nconv(n.Left, obj.FmtLong), badtype)
+				Yyerror("cannot switch on %v (struct containing %v cannot be compared)", Nconv(n.Left, FmtLong), badtype)
 			case t.Etype == TFUNC:
 				nilonly = "func"
 			case t.Etype == TMAP:
@@ -141,7 +140,7 @@
 					case nilonly != "" && !isnil(n1):
 						Yyerror("invalid case %v in switch (can only compare %s %v to nil)", n1, nilonly, n.Left)
 					case Isinter(t) && !Isinter(n1.Type) && algtype1(n1.Type, nil) == ANOEQ:
-						Yyerror("invalid case %v in switch (incomparable type)", Nconv(n1, obj.FmtLong))
+						Yyerror("invalid case %v in switch (incomparable type)", Nconv(n1, FmtLong))
 					}
 
 				// type switch
@@ -151,15 +150,15 @@
 					switch {
 					case n1.Op == OLITERAL && Istype(n1.Type, TNIL):
 					case n1.Op != OTYPE && n1.Type != nil: // should this be ||?
-						Yyerror("%v is not a type", Nconv(n1, obj.FmtLong))
+						Yyerror("%v is not a type", Nconv(n1, FmtLong))
 						// reset to original type
 						n1 = n.Left.Right
 						ls[i1] = n1
 					case n1.Type.Etype != TINTER && t.Etype == TINTER && !implements(n1.Type, t, &missing, &have, &ptr):
 						if have != nil && !missing.Broke && !have.Broke {
-							Yyerror("impossible type switch case: %v cannot have dynamic type %v"+" (wrong type for %v method)\n\thave %v%v\n\twant %v%v", Nconv(n.Left.Right, obj.FmtLong), n1.Type, missing.Sym, have.Sym, Tconv(have.Type, obj.FmtShort), missing.Sym, Tconv(missing.Type, obj.FmtShort))
+							Yyerror("impossible type switch case: %v cannot have dynamic type %v"+" (wrong type for %v method)\n\thave %v%v\n\twant %v%v", Nconv(n.Left.Right, FmtLong), n1.Type, missing.Sym, have.Sym, Tconv(have.Type, FmtShort), missing.Sym, Tconv(missing.Type, FmtShort))
 						} else if !missing.Broke {
-							Yyerror("impossible type switch case: %v cannot have dynamic type %v"+" (missing %v method)", Nconv(n.Left.Right, obj.FmtLong), n1.Type, missing.Sym)
+							Yyerror("impossible type switch case: %v cannot have dynamic type %v"+" (missing %v method)", Nconv(n.Left.Right, FmtLong), n1.Type, missing.Sym)
 						}
 					}
 				}
diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go
index cf3cadb..da2f695 100644
--- a/src/cmd/compile/internal/gc/typecheck.go
+++ b/src/cmd/compile/internal/gc/typecheck.go
@@ -475,7 +475,7 @@
 
 		if !Isptr[t.Etype] {
 			if top&(Erv|Etop) != 0 {
-				Yyerror("invalid indirect of %v", Nconv(n.Left, obj.FmtLong))
+				Yyerror("invalid indirect of %v", Nconv(n.Left, FmtLong))
 				n.Type = nil
 				return
 			}
@@ -846,7 +846,7 @@
 			}
 
 			if n.Type.Etype != TFUNC || n.Type.Thistuple != 1 {
-				Yyerror("type %v has no method %v", n.Left.Type, Sconv(n.Right.Sym, obj.FmtShort))
+				Yyerror("type %v has no method %v", n.Left.Type, Sconv(n.Right.Sym, FmtShort))
 				n.Type = nil
 				n.Type = nil
 				return
@@ -950,11 +950,11 @@
 			var ptr int
 			if !implements(n.Type, t, &missing, &have, &ptr) {
 				if have != nil && have.Sym == missing.Sym {
-					Yyerror("impossible type assertion:\n\t%v does not implement %v (wrong type for %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", n.Type, t, missing.Sym, have.Sym, Tconv(have.Type, obj.FmtShort|obj.FmtByte), missing.Sym, Tconv(missing.Type, obj.FmtShort|obj.FmtByte))
+					Yyerror("impossible type assertion:\n\t%v does not implement %v (wrong type for %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", n.Type, t, missing.Sym, have.Sym, Tconv(have.Type, FmtShort|FmtByte), missing.Sym, Tconv(missing.Type, FmtShort|FmtByte))
 				} else if ptr != 0 {
 					Yyerror("impossible type assertion:\n\t%v does not implement %v (%v method has pointer receiver)", n.Type, t, missing.Sym)
 				} else if have != nil {
-					Yyerror("impossible type assertion:\n\t%v does not implement %v (missing %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", n.Type, t, missing.Sym, have.Sym, Tconv(have.Type, obj.FmtShort|obj.FmtByte), missing.Sym, Tconv(missing.Type, obj.FmtShort|obj.FmtByte))
+					Yyerror("impossible type assertion:\n\t%v does not implement %v (missing %v method)\n"+"\t\thave %v%v\n\t\twant %v%v", n.Type, t, missing.Sym, have.Sym, Tconv(have.Type, FmtShort|FmtByte), missing.Sym, Tconv(missing.Type, FmtShort|FmtByte))
 				} else {
 					Yyerror("impossible type assertion:\n\t%v does not implement %v (missing %v method)", n.Type, t, missing.Sym)
 				}
@@ -1428,7 +1428,7 @@
 		break OpSwitch
 
 	badcall1:
-		Yyerror("invalid argument %v for %v", Nconv(n.Left, obj.FmtLong), Oconv(n.Op, 0))
+		Yyerror("invalid argument %v for %v", Nconv(n.Left, FmtLong), Oconv(n.Op, 0))
 		n.Type = nil
 		return
 
@@ -1561,7 +1561,7 @@
 		l := args.First()
 		r := args.Second()
 		if l.Type != nil && l.Type.Etype != TMAP {
-			Yyerror("first argument to delete must be map; have %v", Tconv(l.Type, obj.FmtLong))
+			Yyerror("first argument to delete must be map; have %v", Tconv(l.Type, FmtLong))
 			n.Type = nil
 			return
 		}
@@ -1605,7 +1605,7 @@
 				return
 			}
 
-			Yyerror("first argument to append must be slice; have %v", Tconv(t, obj.FmtLong))
+			Yyerror("first argument to append must be slice; have %v", Tconv(t, FmtLong))
 			n.Type = nil
 			return
 		}
@@ -1688,25 +1688,25 @@
 			if Eqtype(n.Left.Type.Type, bytetype) {
 				break OpSwitch
 			}
-			Yyerror("arguments to copy have different element types: %v and string", Tconv(n.Left.Type, obj.FmtLong))
+			Yyerror("arguments to copy have different element types: %v and string", Tconv(n.Left.Type, FmtLong))
 			n.Type = nil
 			return
 		}
 
 		if !Isslice(n.Left.Type) || !Isslice(n.Right.Type) {
 			if !Isslice(n.Left.Type) && !Isslice(n.Right.Type) {
-				Yyerror("arguments to copy must be slices; have %v, %v", Tconv(n.Left.Type, obj.FmtLong), Tconv(n.Right.Type, obj.FmtLong))
+				Yyerror("arguments to copy must be slices; have %v, %v", Tconv(n.Left.Type, FmtLong), Tconv(n.Right.Type, FmtLong))
 			} else if !Isslice(n.Left.Type) {
-				Yyerror("first argument to copy should be slice; have %v", Tconv(n.Left.Type, obj.FmtLong))
+				Yyerror("first argument to copy should be slice; have %v", Tconv(n.Left.Type, FmtLong))
 			} else {
-				Yyerror("second argument to copy should be slice or string; have %v", Tconv(n.Right.Type, obj.FmtLong))
+				Yyerror("second argument to copy should be slice or string; have %v", Tconv(n.Right.Type, FmtLong))
 			}
 			n.Type = nil
 			return
 		}
 
 		if !Eqtype(n.Left.Type.Type, n.Right.Type.Type) {
-			Yyerror("arguments to copy have different element types: %v and %v", Tconv(n.Left.Type, obj.FmtLong), Tconv(n.Right.Type, obj.FmtLong))
+			Yyerror("arguments to copy have different element types: %v and %v", Tconv(n.Left.Type, FmtLong), Tconv(n.Right.Type, FmtLong))
 			n.Type = nil
 			return
 		}
@@ -1727,7 +1727,7 @@
 		n.Op = convertop(t, n.Type, &why)
 		if n.Op == 0 {
 			if n.Diag == 0 && !n.Type.Broke {
-				Yyerror("cannot convert %v to type %v%s", Nconv(n.Left, obj.FmtLong), n.Type, why)
+				Yyerror("cannot convert %v to type %v%s", Nconv(n.Left, FmtLong), n.Type, why)
 				n.Diag = 1
 			}
 
@@ -2053,7 +2053,7 @@
 		if n.Left != nil {
 			t := n.Left.Type
 			if t != nil && t.Etype != TBOOL {
-				Yyerror("non-bool %v used as for condition", Nconv(n.Left, obj.FmtLong))
+				Yyerror("non-bool %v used as for condition", Nconv(n.Left, FmtLong))
 			}
 		}
 		typecheck(&n.Right, Etop)
@@ -2068,7 +2068,7 @@
 		if n.Left != nil {
 			t := n.Left.Type
 			if t != nil && t.Etype != TBOOL {
-				Yyerror("non-bool %v used as if condition", Nconv(n.Left, obj.FmtLong))
+				Yyerror("non-bool %v used as if condition", Nconv(n.Left, FmtLong))
 			}
 		}
 		typechecklist(n.Nbody.Slice(), Etop)
@@ -2422,7 +2422,7 @@
 
 	// disallow T.m if m requires *T receiver
 	if Isptr[f2.Type.Recv().Type.Etype] && !Isptr[t.Etype] && f2.Embedded != 2 && !isifacemethod(f2.Type) {
-		Yyerror("invalid method expression %v (needs pointer receiver: (*%v).%v)", n, t, Sconv(f2.Sym, obj.FmtShort))
+		Yyerror("invalid method expression %v (needs pointer receiver: (*%v).%v)", n, t, Sconv(f2.Sym, FmtShort))
 		return false
 	}
 
@@ -2516,7 +2516,7 @@
 				n.Left.Implicit = true
 				typecheck(&n.Left, Etype|Erv)
 			} else if tt.Etype == Tptr && tt.Type.Etype == Tptr && Eqtype(derefall(tt), derefall(rcvr)) {
-				Yyerror("calling method %v with receiver %v requires explicit dereference", n.Right, Nconv(n.Left, obj.FmtLong))
+				Yyerror("calling method %v with receiver %v requires explicit dereference", n.Right, Nconv(n.Left, FmtLong))
 				for tt.Etype == Tptr {
 					// Stop one level early for method with pointer receiver.
 					if rcvr.Etype == Tptr && tt.Type.Etype != Tptr {
@@ -3288,7 +3288,7 @@
 	var why string
 
 	if assignop(src, dst.Type, &why) == 0 {
-		Yyerror("cannot assign %v to %v in multiple assignment%s", src, Nconv(dst, obj.FmtLong), why)
+		Yyerror("cannot assign %v to %v in multiple assignment%s", src, Nconv(dst, FmtLong), why)
 		return
 	}
 }
@@ -3709,7 +3709,7 @@
 			}
 
 			if !isideal(e.Type) && !Eqtype(t, e.Type) {
-				Yyerror("cannot use %v as type %v in const initializer", Nconv(e, obj.FmtLong), t)
+				Yyerror("cannot use %v as type %v in const initializer", Nconv(e, FmtLong), t)
 				goto ret
 			}
 
diff --git a/src/cmd/compile/internal/gc/unsafe.go b/src/cmd/compile/internal/gc/unsafe.go
index f69f6f3..a1a81e7 100644
--- a/src/cmd/compile/internal/gc/unsafe.go
+++ b/src/cmd/compile/internal/gc/unsafe.go
@@ -4,8 +4,6 @@
 
 package gc
 
-import "cmd/internal/obj"
-
 // unsafenmagic rewrites calls to package unsafe's functions into constants.
 func unsafenmagic(nn *Node) *Node {
 	fn := nn.Left
@@ -84,7 +82,7 @@
 				v += r1.Xoffset
 			default:
 				Dump("unsafenmagic", r)
-				Fatalf("impossible %v node after dot insertion", Oconv(r1.Op, obj.FmtSharp))
+				Fatalf("impossible %v node after dot insertion", Oconv(r1.Op, FmtSharp))
 				goto bad
 			}
 		}
diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go
index b9f2b52..b4c38ec 100644
--- a/src/cmd/compile/internal/gc/walk.go
+++ b/src/cmd/compile/internal/gc/walk.go
@@ -185,7 +185,7 @@
 		ORECOVER,
 		OGETG:
 		if n.Typecheck == 0 {
-			Fatalf("missing typecheck: %v", Nconv(n, obj.FmtSign))
+			Fatalf("missing typecheck: %v", Nconv(n, FmtSign))
 		}
 		init := n.Ninit
 		n.Ninit.Set(nil)
@@ -199,7 +199,7 @@
 	// the value received.
 	case ORECV:
 		if n.Typecheck == 0 {
-			Fatalf("missing typecheck: %v", Nconv(n, obj.FmtSign))
+			Fatalf("missing typecheck: %v", Nconv(n, FmtSign))
 		}
 		init := n.Ninit
 		n.Ninit.Set(nil)
@@ -349,7 +349,7 @@
 	}
 
 	if n.Op == ONAME {
-		Fatalf("walkstmt ended up with name: %v", Nconv(n, obj.FmtSign))
+		Fatalf("walkstmt ended up with name: %v", Nconv(n, FmtSign))
 	}
 
 	*np = n
@@ -484,14 +484,14 @@
 	}
 
 	if n.Typecheck != 1 {
-		Fatalf("missed typecheck: %v\n", Nconv(n, obj.FmtSign))
+		Fatalf("missed typecheck: %v\n", Nconv(n, FmtSign))
 	}
 
 opswitch:
 	switch n.Op {
 	default:
 		Dump("walk", n)
-		Fatalf("walkexpr: switch 1 unknown op %v", Nconv(n, obj.FmtShort|obj.FmtSign))
+		Fatalf("walkexpr: switch 1 unknown op %v", Nconv(n, FmtShort|FmtSign))
 
 	case OTYPE,
 		ONONAME,
@@ -1005,7 +1005,7 @@
 			ll = append(ll, typename(n.Type))
 		}
 		if !Isinter(n.Left.Type) && !isnilinter(n.Type) {
-			sym := Pkglookup(Tconv(n.Left.Type, obj.FmtLeft)+"."+Tconv(n.Type, obj.FmtLeft), itabpkg)
+			sym := Pkglookup(Tconv(n.Left.Type, FmtLeft)+"."+Tconv(n.Type, FmtLeft), itabpkg)
 			if sym.Def == nil {
 				l := Nod(ONAME, nil, nil)
 				l.Sym = sym
@@ -1675,7 +1675,7 @@
 		var nln, nrn Nodes
 		nln.Set(nl)
 		nrn.Set(nr)
-		Yyerror("error in shape across %v %v %v / %d %d [%s]", Hconv(nln, obj.FmtSign), Oconv(op, 0), Hconv(nrn, obj.FmtSign), len(nl), len(nr), Curfn.Func.Nname.Sym.Name)
+		Yyerror("error in shape across %v %v %v / %d %d [%s]", Hconv(nln, FmtSign), Oconv(op, 0), Hconv(nrn, FmtSign), len(nl), len(nr), Curfn.Func.Nname.Sym.Name)
 	}
 	return nn
 }
@@ -2302,7 +2302,7 @@
 
 		switch l.Op {
 		default:
-			Fatalf("reorder3 unexpected lvalue %v", Oconv(l.Op, obj.FmtSharp))
+			Fatalf("reorder3 unexpected lvalue %v", Oconv(l.Op, FmtSharp))
 
 		case ONAME:
 			break