1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/Reassociate/inverses.ll b/test/Transforms/Reassociate/inverses.ll
new file mode 100644
index 0000000..34abdc7
--- /dev/null
+++ b/test/Transforms/Reassociate/inverses.ll
@@ -0,0 +1,34 @@
+; RUN: opt < %s -reassociate -die -S | FileCheck %s
+
+define i32 @test1(i32 %a, i32 %b) {
+	%tmp.2 = and i32 %b, %a
+	%tmp.4 = xor i32 %a, -1
+        ; (A&B)&~A == 0
+	%tmp.5 = and i32 %tmp.2, %tmp.4
+	ret i32 %tmp.5
+; CHECK: @test1
+; CHECK: ret i32 0
+}
+
+define i32 @test2(i32 %a, i32 %b) {
+	%tmp.1 = and i32 %a, 1234
+	%tmp.2 = and i32 %b, %tmp.1
+	%tmp.4 = xor i32 %a, -1
+	; A&~A == 0
+        %tmp.5 = and i32 %tmp.2, %tmp.4
+	ret i32 %tmp.5
+; CHECK: @test2
+; CHECK: ret i32 0
+}
+
+define i32 @test3(i32 %b, i32 %a) {
+	%tmp.1 = add i32 %a, 1234
+	%tmp.2 = add i32 %b, %tmp.1
+	%tmp.4 = sub i32 0, %a
+        ; (b+(a+1234))+-a -> b+1234
+  	%tmp.5 = add i32 %tmp.2, %tmp.4
+	ret i32 %tmp.5
+; CHECK: @test3
+; CHECK: %tmp.5 = add i32 %b, 1234
+; CHECK: ret i32 %tmp.5
+}