; This test makes sure that xor instructions are properly eliminated. | |
; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0. | |
; RUN: opt < %s -instcombine -S | not grep {xor } | |
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, 70368744177661 | |
%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 | |
} |