1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
; This test makes sure that xor instructions are properly eliminated.
; This test is for Integer BitWidth > 64 && BitWidth <= 1024.
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | 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
}
|
