diff --git a/test/Transforms/InstSimplify/2010-12-20-Distribute.ll b/test/Transforms/InstSimplify/2010-12-20-Distribute.ll
index 56f78234172..4aac8dd5884 100644
--- a/test/Transforms/InstSimplify/2010-12-20-Distribute.ll
+++ b/test/Transforms/InstSimplify/2010-12-20-Distribute.ll
@@ -10,6 +10,16 @@ define i32 @factorize(i32 %x, i32 %y) {
 ; CHECK: ret i32 %x
 }
 
+define i32 @factorize2(i32 %x) {
+; CHECK: @factorize2
+; 3*X - 2*X -> X
+  %l = mul i32 3, %x
+  %r = mul i32 2, %x
+  %z = sub i32 %l, %r
+  ret i32 %z
+; CHECK: ret i32 %x
+}
+
 define i32 @expand(i32 %x) {
 ; CHECK: @expand
 ; ((X & 1) | 2) & 1 -> ((X & 1) & 1) | (2 & 1) -> (X & 1) | 0 -> X & 1