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; 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
}
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