cmd/internal/obj: update callers to Linkline{fmt,hist} and remove

Does the TODOs added by https://golang.org/cl/7623.

Passes rsc.io/toolstash/buildall.

Change-Id: I23913a8f03834640e9795d48318febb3f88c10f9
Reviewed-on: https://go-review.googlesource.com/9160Reviewed-by: Russ Cox <rsc@golang.org>

src/cmd/asm/internal/lex/input.go

@@ -13,7 +13,6 @@ import (
 	"text/scanner"
 
 	"cmd/asm/internal/flags"
-	"cmd/internal/obj"
 )
 
 // Input is the main input: a stack of readers and some macro definitions.
@@ -436,7 +435,7 @@ func (in *Input) line() {
 	if tok != '\n' {
 		in.Error("unexpected token at end of #line: ", tok)
 	}
-	obj.Linklinehist(linkCtxt, histLine, file, line)
+	linkCtxt.LineHist.Update(histLine, file, line)
 	in.Stack.SetPos(line, file)
 }
 

src/cmd/asm/internal/lex/tokenizer.go

@@ -10,8 +10,6 @@ import (
 	"strings"
 	"text/scanner"
 	"unicode"
-
-	"cmd/internal/obj"
 )
 
 // A Tokenizer is a simple wrapping of text/scanner.Scanner, configured
@@ -40,7 +38,7 @@ func NewTokenizer(name string, r io.Reader, file *os.File) *Tokenizer {
 	s.Position.Filename = name
 	s.IsIdentRune = isIdentRune
 	if file != nil {
-		obj.Linklinehist(linkCtxt, histLine, name, 0)
+		linkCtxt.LineHist.Push(histLine, name)
 	}
 	return &Tokenizer{
 		s:        &s,
@@ -149,6 +147,6 @@ func (t *Tokenizer) Close() {
 	if t.file != nil {
 		t.file.Close()
 		// It's an open file, so pop the line history.
-		obj.Linklinehist(linkCtxt, histLine, "<pop>", 0)
+		linkCtxt.LineHist.Pop(histLine)
 	}
 }

src/cmd/internal/asm/lexbody.go

@@ -149,7 +149,7 @@ func newfile(s string, f *os.File) {
 	}
 
 	fi.P = nil
-	obj.Linklinehist(Ctxt, int(Lineno), s, 0)
+	Ctxt.LineHist.Push(int(Lineno), s)
 }
 
 var thetext *obj.LSym
@@ -630,7 +630,7 @@ loop:
 	n, _ = i.F.Read(i.B[:])
 	if n == 0 {
 		i.F.Close()
-		obj.Linklinehist(Ctxt, int(Lineno), "<pop>", 0)
+		Ctxt.LineHist.Pop(int(Lineno))
 		goto pop
 	}
 	fi.P = i.B[1:n]

src/cmd/internal/asm/macbody.go

@@ -32,7 +32,6 @@ package asm
 
 import (
 	"bytes"
-	"cmd/internal/obj"
 	"fmt"
 	"os"
 	"strings"
@@ -683,7 +682,7 @@ func maclin() {
 	}
 
 nn:
-	obj.Linklinehist(Ctxt, int(Lineno), symb, int(n))
+	Ctxt.LineHist.Update(int(Lineno), symb, int(n))
 	return
 
 bad:
@@ -796,7 +795,7 @@ func macprag() {
 		/*
 		 * put pragma-line in as a funny history
 		 */
-		obj.Linklinehist(Ctxt, int(Lineno), symb, -1)
+		Ctxt.AddImport(symb)
 		return
 	}
 	if s != nil && s.Name == "pack" {

src/cmd/internal/gc/lex.go

@@ -313,7 +313,7 @@ func Main() {
 	lexlineno = 1
 
 	for _, infile = range flag.Args() {
-		linehist(infile, 0, 0)
+		linehistpush(infile)
 
 		curio.infile = infile
 		var err error
@@ -344,7 +344,7 @@ func Main() {
 			errorexit()
 		}
 
-		linehist("<pop>", 0, 0)
+		linehistpop()
 		if curio.bin != nil {
 			obj.Bterm(curio.bin)
 		}
@@ -763,7 +763,7 @@ func importfile(f *Val, line int) {
 
 	// assume files move (get installed)
 	// so don't record the full path.
-	linehist(file[len(file)-len(path_)-2:], -1, 1) // acts as #pragma lib
+	linehistpragma(file[len(file)-len(path_)-2:]) // acts as #pragma lib
 
 	/*
 	 * position the input right
@@ -1654,7 +1654,7 @@ func getlinepragma() int {
 	}
 
 	name = text[:linep-1]
-	linehist(name, int32(n), 0)
+	linehistupdate(name, n)
 	return c
 
 out:

src/cmd/internal/gc/subr.go

@@ -199,26 +199,32 @@ func Fatal(fmt_ string, args ...interface{}) {
 	errorexit()
 }
 
-func linehist(file string, off int32, relative int) {
+func linehistpragma(file string) {
 	if Debug['i'] != 0 {
-		if file != "" {
-			if off < 0 {
-				fmt.Printf("pragma %s", file)
-			} else if off > 0 {
-				fmt.Printf("line %s", file)
-			} else {
-				fmt.Printf("import %s", file)
-			}
-		} else {
-			fmt.Printf("end of import")
-		}
-		fmt.Printf(" at line %v\n", Ctxt.Line(int(lexlineno)))
+		fmt.Printf("pragma %s at line %v\n", file, Ctxt.Line(int(lexlineno)))
+	}
+	Ctxt.AddImport(file)
+}
+
+func linehistpush(file string) {
+	if Debug['i'] != 0 {
+		fmt.Printf("import %s at line %v\n", file, Ctxt.Line(int(lexlineno)))
 	}
+	Ctxt.LineHist.Push(int(lexlineno), file)
+}
 
-	if off < 0 && file[0] != '/' && relative == 0 {
-		file = fmt.Sprintf("%s/%s", Ctxt.Pathname, file)
+func linehistpop() {
+	if Debug['i'] != 0 {
+		fmt.Printf("end of import at line %v\n", Ctxt.Line(int(lexlineno)))
+	}
+	Ctxt.LineHist.Pop(int(lexlineno))
+}
+
+func linehistupdate(file string, off int) {
+	if Debug['i'] != 0 {
+		fmt.Printf("line %s at line %v\n", file, Ctxt.Line(int(lexlineno)))
 	}
-	obj.Linklinehist(Ctxt, int(lexlineno), file, int(off))
+	Ctxt.LineHist.Update(int(lexlineno), file, off)
 }
 
 func setlineno(n *Node) int32 {
@@ -2345,7 +2351,7 @@ func genwrapper(rcvr *Type, method *Type, newnam *Sym, iface int) {
 	lineno = lexlineno
 	if genwrapper_linehistdone == 0 {
 		// All the wrappers can share the same linehist entry.
-		linehist("<autogenerated>", 0, 0)
+		linehistpush("<autogenerated>")
 
 		genwrapper_linehistdone = 1
 	}

src/cmd/internal/gc/util.go

 package gc
 
 import (
-	"cmd/internal/obj"
 	"os"
 	"runtime"
 	"runtime/pprof"
@@ -10,7 +9,7 @@ import (
 )
 
 func (n *Node) Line() string {
-	return obj.Linklinefmt(Ctxt, int(n.Lineno), false, false)
+	return Ctxt.LineHist.LineString(int(n.Lineno))
 }
 
 func atoi(s string) int {

src/cmd/internal/obj/line_test.go

@@ -13,13 +13,13 @@ func TestLineHist(t *testing.T) {
 	ctxt := new(Link)
 	ctxt.Hash = make(map[SymVer]*LSym)
 
-	Linklinehist(ctxt, 1, "a.c", 0)
-	Linklinehist(ctxt, 3, "a.h", 0)
-	Linklinehist(ctxt, 5, "<pop>", 0)
-	Linklinehist(ctxt, 7, "linedir", 2)
-	Linklinehist(ctxt, 9, "<pop>", 0)
-	Linklinehist(ctxt, 11, "b.c", 0)
-	Linklinehist(ctxt, 13, "<pop>", 0)
+	ctxt.LineHist.Push(1, "a.c")
+	ctxt.LineHist.Push(3, "a.h")
+	ctxt.LineHist.Pop(5)
+	ctxt.LineHist.Update(7, "linedir", 2)
+	ctxt.LineHist.Pop(9)
+	ctxt.LineHist.Push(11, "b.c")
+	ctxt.LineHist.Pop(13)
 
 	var expect = []string{
 		0:  "??:0",

src/cmd/internal/obj/obj.go

@@ -241,12 +241,6 @@ func (h *LineHist) LineString(lineno int) string {
 	return text
 }
 
-// TODO(rsc): Replace call sites with use of ctxt.LineHist.
-// Note that all call sites use showAll=false, showFullPath=false.
-func Linklinefmt(ctxt *Link, lineno int, showAll, showFullPath bool) string {
-	return ctxt.LineHist.LineString(lineno)
-}
-
 // FileLine returns the file name and line number
 // at the top of the stack for the given lineno.
 func (h *LineHist) FileLine(lineno int) (file string, line int) {
@@ -287,30 +281,3 @@ func linkgetline(ctxt *Link, lineno int32, f **LSym, l *int32) {
 func Linkprfile(ctxt *Link, line int) {
 	fmt.Printf("%s ", ctxt.LineHist.LineString(line))
 }
-
-// Linklinehist pushes, amends, or pops an entry on the line history stack.
-// If f != "<pop>" and n == 0, the call pushes the start of a new file named f at lineno.
-// If f != "<pop>" and n > 0, the call amends the top of the stack to record that lineno
-// now corresponds to f at line n.
-// If f == "<pop>", the call pops the topmost entry from the stack, picking up
-// the parent file at the line following the one where the corresponding push occurred.
-//
-// If n < 0, linklinehist records f as a package required by the current compilation
-// (nothing to do with line numbers).
-//
-// TODO(rsc): Replace uses with direct calls to ctxt.Hist methods.
-func Linklinehist(ctxt *Link, lineno int, f string, n int) {
-	switch {
-	case n < 0:
-		ctxt.AddImport(f)
-
-	case f == "<pop>":
-		ctxt.LineHist.Pop(lineno)
-
-	case n == 0:
-		ctxt.LineHist.Push(lineno, f)
-
-	default:
-		ctxt.LineHist.Update(lineno, f, n)
-	}
-}

src/cmd/internal/obj/util.go

@@ -241,7 +241,7 @@ func Atoi(s string) int {
 }
 
 func (p *Prog) Line() string {
-	return Linklinefmt(p.Ctxt, int(p.Lineno), false, false)
+	return p.Ctxt.LineHist.LineString(int(p.Lineno))
 }
 
 var armCondCode = []string{
@@ -340,7 +340,7 @@ func (ctxt *Link) NewProg() *Prog {
 }
 
 func (ctxt *Link) Line(n int) string {
-	return Linklinefmt(ctxt, n, false, false)
+	return ctxt.LineHist.LineString(n)
 }
 
 func Getcallerpc(interface{}) uintptr {