1 files changed, 17 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/not.ll b/test/Transforms/InstCombine/not.ll
index 57560d61d6..24d8f69a4b 100644
--- a/test/Transforms/InstCombine/not.ll
+++ b/test/Transforms/InstCombine/not.ll
@@ -29,3 +29,20 @@ int %test3(int %A, int %B) {
 	%d = xor int %c, -1
 	ret int %d
 }
+
+; Test that demorgens law can work with constants
+int %test4(int %A, int %B) {
+	%a = xor int %A, -1
+	%c = and int %a, 5    ; 5 = ~c2
+	%d = xor int %c, -1
+	ret int %d
+}
+
+; test the mirror of demorgans law...
+int %test5(int %A, int %B) {
+	%a = xor int %A, -1
+	%b = xor int %B, -1
+	%c = or int %a, %b
+	%d = xor int %c, -1
+	ret int %d
+}