1 files changed, 52 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/apint-xor1.ll b/test/Transforms/InstCombine/apint-xor1.ll
new file mode 100644
index 0000000000..8daa9cc442
--- /dev/null
+++ b/test/Transforms/InstCombine/apint-xor1.ll
@@ -0,0 +1,52 @@
+; This test makes sure that xor instructions are properly eliminated.
+; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0.
+
+; RUN: llvm-as < %s | opt -instcombine -disable-output &&
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'xor '
+
+implementation
+
+define i47 @test1(i47 %A, i47 %B) {
+        ;; (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
+        %A1 = and i47 %A, 70368744177664
+        %B1 = and i47 %B, 70368744177663
+        %C1 = xor i47 %A1, %B1
+        ret i47 %C1
+}
+
+define i15 @test2(i15 %x) {
+        %tmp.2 = xor i15 %x, 0
+        ret i15 %tmp.2
+}
+
+define i23 @test3(i23 %x) {
+        %tmp.2 = xor i23 %x, %x
+        ret i23 %tmp.2
+}
+
+define i37 @test4(i37 %x) {
+        ; x ^ ~x == -1
+        %NotX = xor i37 -1, %x
+        %B = xor i37 %x, %NotX
+        ret i37 %B
+}
+
+define i7 @test5(i7 %A) {
+        ;; (A|B)^B == A & (~B)
+        %t1 = or i7 %A, 23
+        %r = xor i7 %t1, 23
+        ret i7 %r
+}
+
+define i7 @test6(i7 %A) {
+        %t1 = xor i7 %A, 23
+        %r = xor i7 %t1, 23
+        ret i7 %r
+}
+
+define i47 @test7(i47 %A) {
+        ;; (A | C1) ^ C2 -> (A | C1) & ~C2 iff (C1&C2) == C2
+        %B1 = or i47 %A,   70368744177663
+        %C1 = xor i47 %B1, 703687463
+        ret i47 %C1
+}