1 files changed, 20 insertions, 0 deletions
diff --git a/src/cmd/internal/rsc.io/x86/x86asm/inst_test.go b/src/cmd/internal/rsc.io/x86/x86asm/inst_test.go
new file mode 100644
index 000000000..23ac52320
--- /dev/null
+++ b/src/cmd/internal/rsc.io/x86/x86asm/inst_test.go
@@ -0,0 +1,20 @@
+// Copyright 2014 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package x86asm
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestRegString(t *testing.T) {
+	for r := Reg(1); r <= regMax; r++ {
+		if regNames[r] == "" {
+			t.Errorf("regNames[%d] is missing", int(r))
+		} else if s := r.String(); strings.Contains(s, "Reg(") {
+			t.Errorf("Reg(%d).String() = %s, want proper name", int(r), s)
+		}
+	}
+}