[dev.link] cmd/link: convert typelink pass to new style

Change-Id: If861409a5cc4e398496199a89498a141f106f44f
Reviewed-on: https://go-review.googlesource.com/c/go/+/227762
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/src/cmd/link/internal/loader/loader.go b/src/cmd/link/internal/loader/loader.go
index 3437b42b65..cd5971c2e1 100644
--- a/src/cmd/link/internal/loader/loader.go
+++ b/src/cmd/link/internal/loader/loader.go
@@ -659,7 +659,9 @@ func (l *Loader) SymType(i Sym) sym.SymKind {
 // Returns the attributes of the i-th symbol.
 func (l *Loader) SymAttr(i Sym) uint8 {
 	if l.IsExternal(i) {
-		// TODO: do something? External symbols have different representation of attributes. For now, ReflectMethod is the only thing matters and it cannot be set by external symbol.
+		// TODO: do something? External symbols have different representation of attributes.
+		// For now, ReflectMethod, NoSplit, GoType, and Typelink are used and they cannot be
+		// set by external symbol.
 		return 0
 	}
 	r, li := l.toLocal(i)
@@ -982,6 +984,11 @@ func (l *Loader) IsGoType(i Sym) bool {
 	return l.SymAttr(i)&goobj2.SymFlagGoType != 0
 }
 
+// Returns whether this symbol should be included in typelink.
+func (l *Loader) IsTypelink(i Sym) bool {
+	return l.SymAttr(i)&goobj2.SymFlagTypelink != 0
+}
+
 // Returns whether this is a "go.itablink.*" symbol.
 func (l *Loader) IsItabLink(i Sym) bool {
 	if _, ok := l.itablink[i]; ok {