diff --git a/test/CodeGen/PowerPC/asym-regclass-copy.ll b/test/CodeGen/PowerPC/asym-regclass-copy.ll
index cdfbcbc0f1d..c399802a1ee 100644
--- a/test/CodeGen/PowerPC/asym-regclass-copy.ll
+++ b/test/CodeGen/PowerPC/asym-regclass-copy.ll
@@ -2,6 +2,8 @@
 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
 target triple = "powerpc64-unknown-linux-gnu"
 
+; This test triggers the use of the asymmetric OR8_32 copy pattern.
+
 @gen_random.last = external unnamed_addr global i64, align 8
 @.str = external unnamed_addr constant [4 x i8], align 1