aboutsummaryrefslogtreecommitdiff
path: root/test/Transforms/InstCombine/or.ll
blob: 669540b5e0f61b195dea653cc70c949e0815164a (plain)
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
; This test makes sure that these instructions are properly eliminated.
;

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v xor | not grep 'or '

implementation

int %test1(int %A) {
	%B = or int %A, 0
	ret int %B
}

int %test2(int %A) {
	%B = or int %A, -1
	ret int %B
}

ubyte %test2a(ubyte %A) {
	%B = or ubyte %A, 255
	ret ubyte %B
}

bool %test3(bool %A) {
	%B = or bool %A, false
	ret bool %B
}

bool %test4(bool %A) {
	%B = or bool %A, true
	ret bool %B
}

bool %test5(bool %A) {
	%B = or bool %A, %A
	ret bool %B
}

int %test6(int %A) {
	%B = or int %A, %A
	ret int %B
}

int %test7(int %A) {    ; A | ~A == -1
        %NotA = xor int -1, %A
        %B = or int %A, %NotA
        ret int %B
}

ubyte %test8(ubyte %A) {
	%B = or ubyte %A, 254
	%C = or ubyte %B, 1
	ret ubyte %C
}

ubyte %test9(ubyte %A, ubyte %B) {  ; Test that (A|c1)|(B|c2) == (A|B)|(c1|c2)
	%C = or ubyte %A, 1
	%D = or ubyte %B, 254
	%E = or ubyte %C, %D
	ret ubyte %E
}

ubyte %test10(ubyte %A) {
	%B = or ubyte %A, 1
	%C = and ubyte %B, 254
	%D = or ubyte %C, 254  ; (X & C1) | C2 --> (X | C2) & (C1|C2)
	ret ubyte %D
}

ubyte %test11(ubyte %A) {
	%B = or ubyte %A, 254
	%C = xor ubyte %B, 13
	%D = or ubyte %C, 1    ; (X ^ C1) | C2 --> (X | C2) ^ (C1&~C2)
	%E = xor ubyte %D, 12
	ret ubyte %E
}

uint %test12(uint %A) {
	%B = or uint %A, 4     ; Should be eliminated
	%C = and uint %B, 8
	ret uint %C
}

uint %test13(uint %A) {
	%B = or uint %A, 12
	%C = and uint %B, 8    ; Always equal to 8
	ret uint %C 
}

bool %test14(uint %A, uint %B) {
	%C1 = setlt uint %A, %B
	%C2 = setgt uint %A, %B
	%D = or bool %C1, %C2      ; (A < B) | (A > B) === A != B
	ret bool %D
}

bool %test15(uint %A, uint %B) {
        %C1 = setlt uint %A, %B
        %C2 = seteq uint %A, %B
        %D = or bool %C1, %C2      ; (A < B) | (A == B) === A <= B
        ret bool %D
}

int %test16(int %A) {
	%B = and int %A, 1
	%C = and int %A, -2       ; -2 = ~1
	%D = or int %B, %C        ; %D = and int %B, -1 == %B
	ret int %D
}

int %test17(int %A) {
	%B = and int %A, 1
	%C = and int %A, 4
	%D = or int %B, %C        ; %D = and int %B, 5
	ret int %D
}

bool %test18(int %A) {
        %B = setge int %A, 100
        %C = setlt int %A, 50
        %D = or bool %B, %C   ;; (A-50) >u 50
        ret bool %D
}

bool %test19(int %A) {
        %B = seteq int %A, 50
        %C = seteq int %A, 51
        %D = or bool %B, %C   ;; (A-50) < 2
        ret bool %D
}