--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/Transforms/InstCombine/apint-xor2.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,51 @@
+; This test makes sure that xor instructions are properly eliminated.
+; This test is for Integer BitWidth > 64 && BitWidth <= 1024.
+
+; RUN: opt < %s -instcombine -S | not grep "xor "
+; END.
+
+
+define i447 @test1(i447 %A, i447 %B) {
+        ;; (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
+        %A1 = and i447 %A, 70368744177664
+        %B1 = and i447 %B, 70368744177663
+        %C1 = xor i447 %A1, %B1
+        ret i447 %C1
+}
+
+define i1005 @test2(i1005 %x) {
+        %tmp.2 = xor i1005 %x, 0
+        ret i1005 %tmp.2
+}
+
+define i123 @test3(i123 %x) {
+        %tmp.2 = xor i123 %x, %x
+        ret i123 %tmp.2
+}
+
+define i737 @test4(i737 %x) {
+        ; x ^ ~x == -1
+        %NotX = xor i737 -1, %x
+        %B = xor i737 %x, %NotX
+        ret i737 %B
+}
+
+define i700 @test5(i700 %A) {
+        ;; (A|B)^B == A & (~B)
+        %t1 = or i700 %A, 288230376151711743 
+        %r = xor i700 %t1, 288230376151711743 
+        ret i700 %r
+}
+
+define i77 @test6(i77 %A) {
+        %t1 = xor i77 %A, 23
+        %r = xor i77 %t1, 23
+        ret i77 %r
+}
+
+define i1023 @test7(i1023 %A) {
+        ;; (A | C1) ^ C2 -> (A | C1) & ~C2 iff (C1&C2) == C2
+        %B1 = or i1023 %A,   70368744177663
+        %C1 = xor i1023 %B1, 703687463
+        ret i1023 %C1
+}