cmd/compile/internal/gc: convert fields of Pkg to bool

Convert Pkg.Imported, Pkg.Exported, Pkg.Direct from uint8/int8/int8 to bool.

This change passes go build -toolexec 'toolstash -cmp' -a std.

Change-Id: I67a71f1186ff9737c03eca413f7d35d8a79ebc9b
Reviewed-on: https://go-review.googlesource.com/14371
Run-TryBot: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

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

@@ -79,12 +79,12 @@ func autoexport(n *Node, ctxt uint8) {
 }
 
 func dumppkg(p *Pkg) {
-	if p == nil || p == localpkg || p.Exported != 0 || p == builtinpkg {
+	if p == nil || p == localpkg || p.Exported || p == builtinpkg {
 		return
 	}
-	p.Exported = 1
+	p.Exported = true
 	suffix := ""
-	if p.Direct == 0 {
+	if !p.Direct {
 		suffix = " // indirect"
 	}
 	fmt.Fprintf(bout, "\timport %s %q%s\n", p.Name, p.Path, suffix)
@@ -371,7 +371,7 @@ func dumpexport() {
 	fmt.Fprintf(bout, "\n")
 
 	for _, p := range pkgs {
-		if p.Direct != 0 {
+		if p.Direct {
 			dumppkg(p)
 		}
 	}

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

@@ -125,9 +125,9 @@ type Pkg struct {
 	Path     string // string literal used in import statement
 	Pathsym  *Sym
 	Prefix   string // escaped path for use in symbol table
-	Imported uint8  // export data of this package was parsed
-	Exported int8   // import line written in export data
-	Direct   int8   // imported directly
+	Imported bool   // export data of this package was parsed
+	Exported bool   // import line written in export data
+	Direct   bool   // imported directly
 	Safe     bool   // whether the package is marked as safe
 	Syms     map[string]*Sym
 }

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

@@ -315,7 +315,7 @@ import_package:
 		} else if importpkg.Name != $2.Name {
 			Yyerror("conflicting names %s and %s for package %q", importpkg.Name, $2.Name, importpkg.Path);
 		}
-		importpkg.Direct = 1;
+		importpkg.Direct = true;
 		importpkg.Safe = curio.importsafe
 
 		if safemode != 0 && !curio.importsafe {

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

@@ -744,7 +744,7 @@ func importfile(f *Val, line int) {
 
 	// If we already saw that package, feed a dummy statement
 	// to the lexer to avoid parsing export data twice.
-	if importpkg.Imported != 0 {
+	if importpkg.Imported {
 		tag := ""
 		if importpkg.Safe {
 			tag = "safe"
@@ -755,7 +755,7 @@ func importfile(f *Val, line int) {
 		return
 	}
 
-	importpkg.Imported = 1
+	importpkg.Imported = true
 
 	var err error
 	var imp *obj.Biobuf

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

@@ -1293,7 +1293,7 @@ func dumptypestructs() {
 
 	// generate import strings for imported packages
 	for _, p := range pkgs {
-		if p.Direct != 0 {
+		if p.Direct {
 			dimportpath(p)
 		}
 	}

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

@@ -1354,7 +1354,7 @@ yydefault:
 			} else if importpkg.Name != yyDollar[2].sym.Name {
 				Yyerror("conflicting names %s and %s for package %q", importpkg.Name, yyDollar[2].sym.Name, importpkg.Path)
 			}
-			importpkg.Direct = 1
+			importpkg.Direct = true
 			importpkg.Safe = curio.importsafe
 
 			if safemode != 0 && !curio.importsafe {