cmd/compile: minor cleanup in sinit.go

Passes toolstash -cmp.

Change-Id: Id16009ef3ef1173eafe0f0c578dbf325b61aab3c
Reviewed-on: https://go-review.googlesource.com/20674
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Dave Cheney <dave@cheney.net>
TryBot-Result: Gobot Gobot <gobot@golang.org>

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

@@ -512,28 +512,11 @@ func staticname(t *Type, ctxt int) *Node {
 
 func isliteral(n *Node) bool {
 	// Treat nils as zeros rather than literals.
-	if n.Op == OLITERAL {
-		if n.Val().Ctype() != CTNIL {
-			return true
-		}
-	}
-	return false
+	return n.Op == OLITERAL && n.Val().Ctype() != CTNIL
 }
 
 func simplename(n *Node) bool {
-	if n.Op != ONAME {
-		return false
-	}
-	if !n.Addable {
-		return false
-	}
-	if n.Class&PHEAP != 0 {
-		return false
-	}
-	if n.Class == PPARAMREF {
-		return false
-	}
-	return true
+	return n.Op == ONAME && n.Addable && n.Class&PHEAP == 0 && n.Class != PPARAMREF
 }
 
 func litas(l *Node, r *Node, init *Nodes) {
@@ -1442,22 +1425,11 @@ func gen_as_init(n *Node, reportOnly bool) bool {
 	default:
 		goto no
 
-	case TBOOL,
-		TINT8,
-		TUINT8,
-		TINT16,
-		TUINT16,
-		TINT32,
-		TUINT32,
-		TINT64,
-		TUINT64,
-		TINT,
-		TUINT,
-		TUINTPTR,
-		TPTR32,
-		TPTR64,
-		TFLOAT32,
-		TFLOAT64:
+	case TBOOL, TINT8, TUINT8, TINT16, TUINT16,
+		TINT32, TUINT32, TINT64, TUINT64,
+		TINT, TUINT, TUINTPTR,
+		TPTR32, TPTR64,
+		TFLOAT32, TFLOAT64:
 		if !reportOnly {
 			gdata(&nam, nr, int(nr.Type.Width))
 		}