testcase for PR1510

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37583 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/test/Transforms/InstCombine/and-or-not.ll b/test/Transforms/InstCombine/and-or-not.ll
new file mode 100644
index 0000000000..9b812c7f73
--- /dev/null
+++ b/test/Transforms/InstCombine/and-or-not.ll
@@ -0,0 +1,27 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep xor | wc -l | grep 2
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep and
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep { or}
+
+; PR1510
+
+; These are all equivelent to A^B
+
+define i32 @test1(i32 %a, i32 %b) {
+entry:
+        %tmp3 = or i32 %b, %a           ; <i32> [#uses=1]
+        %tmp3not = xor i32 %tmp3, -1            ; <i32> [#uses=1]
+        %tmp6 = and i32 %b, %a          ; <i32> [#uses=1]
+        %tmp7 = or i32 %tmp6, %tmp3not          ; <i32> [#uses=1]
+        %tmp7not = xor i32 %tmp7, -1            ; <i32> [#uses=1]
+        ret i32 %tmp7not
+}
+
+define i32 @test2(i32 %a, i32 %b) {
+entry:
+        %tmp3 = or i32 %b, %a           ; <i32> [#uses=1]
+        %tmp6 = and i32 %b, %a          ; <i32> [#uses=1]
+        %tmp6not = xor i32 %tmp6, -1            ; <i32> [#uses=1]
+        %tmp7 = and i32 %tmp3, %tmp6not         ; <i32> [#uses=1]
+        ret i32 %tmp7
+}
+