[dev.unified] cmd/compile/internal/noder: rename exprName to exprGlobal

More descriptive.

Change-Id: I70a07adbe1d395da797fe15b54d2a1106f5f36a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/410098
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>

src/cmd/compile/internal/noder/codes.go

@@ -40,9 +40,9 @@ func (c codeExpr) Value() int                 { return int(c) }
 const (
 	exprNone codeExpr = iota
 	exprConst
-	exprType  // type expression
-	exprLocal // local variable
-	exprName  // global variable or function
+	exprType   // type expression
+	exprLocal  // local variable
+	exprGlobal // global variable or function
 	exprBlank
 	exprCompLit
 	exprFuncLit

src/cmd/compile/internal/noder/reader.go

@@ -1562,7 +1562,7 @@ func (r *reader) expr() (res ir.Node) {
 	case exprLocal:
 		return typecheck.Expr(r.useLocal())
 
-	case exprName:
+	case exprGlobal:
 		// Callee instead of Expr allows builtins
 		// TODO(mdempsky): Handle builtins directly in exprCall, like method calls?
 		return typecheck.Callee(r.obj())

src/cmd/compile/internal/noder/writer.go

@@ -1236,7 +1236,7 @@ func (w *writer) expr(expr syntax.Expr) {
 
 	if obj != nil {
 		if isGlobal(obj) {
-			w.Code(exprName)
+			w.Code(exprGlobal)
 			w.obj(obj, targs)
 			return
 		}