Changed the location of the case closer to similar case

Author: komem3

go/analysis/passes/nilness/nilness.go

@@ -245,7 +245,7 @@ func (n nilness) String() string { return nilnessStrings[n+1] }
 // or unknown given the dominating stack of facts.
 func nilnessOf(stack []fact, v ssa.Value) nilness {
 	switch v := v.(type) {
-	// unwrap ChangeInterface values recursively, to detect if underlying
+	// unwrap ChangeInterface and Slice values recursively, to detect if underlying
 	// values have any facts recorded or are otherwise known with regard to nilness.
 	//
 	// This work must be in addition to expanding facts about
@@ -259,6 +259,10 @@ func nilnessOf(stack []fact, v ssa.Value) nilness {
 		if underlying := nilnessOf(stack, v.X); underlying != unknown {
 			return underlying
 		}
+	case *ssa.Slice:
+		if underlying := nilnessOf(stack, v.X); underlying != unknown {
+			return underlying
+		}
 	}
 
 	// Is value intrinsically nil or non-nil?
@@ -275,12 +279,6 @@ func nilnessOf(stack []fact, v ssa.Value) nilness {
 		*ssa.MakeMap,
 		*ssa.MakeSlice:
 		return isnonnil
-	case *ssa.Slice:
-		// unwrap Slice values recursively, to detect if underlying
-		// values have any facts recorded or are otherwise known with regard to nilness.
-		if underlying := nilnessOf(stack, v.X); underlying != unknown {
-			return underlying
-		}
 	case *ssa.Const:
 		if v.IsNil() {
 			return isnil