1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/apint-or1.ll b/test/Transforms/InstCombine/apint-or1.ll
new file mode 100644
index 000000000000..51b87fe2a200
--- /dev/null
+++ b/test/Transforms/InstCombine/apint-or1.ll
@@ -0,0 +1,36 @@
+; This test makes sure that or instructions are properly eliminated.
+; This test is for Integer BitWidth <= 64 && BitWidth % 2 != 0.
+;
+
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep or
+
+
+define i7 @test0(i7 %X) {
+    %Y = or i7 %X, 0
+    ret i7 %Y
+}
+
+define i17 @test1(i17 %X) {
+    %Y = or i17 %X, -1
+    ret i17 %Y
+} 
+
+define i23 @test2(i23 %A) {
+    ;; A | ~A == -1
+    %NotA = xor i23 -1, %A
+    %B = or i23 %A, %NotA
+    ret i23 %B
+}
+
+define i39 @test3(i39 %V, i39 %M) {
+    ;; If we have: ((V + N) & C1) | (V & C2)
+    ;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0
+    ;; replace with V+N.
+    %C1 = xor i39 274877906943, -1 ;; C2 = 274877906943
+    %N = and i39 %M, 274877906944
+    %A = add i39 %V, %N
+    %B = and i39 %A, %C1
+    %D = and i39 %V, 274877906943
+    %R = or i39 %B, %D
+    ret i39 %R
+}