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
|
; This test makes sure that and instructions are properly eliminated.
; This test is for Integer BitWidth <= 64 && BitWidth % 8 != 0.
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {and }
define i39 @test0(i39 %A) {
%B = and i39 %A, 0 ; zero result
ret i39 %B
}
define i47 @test1(i47 %A, i47 %B) {
;; (~A & ~B) == (~(A | B)) - De Morgan's Law
%NotA = xor i47 %A, -1
%NotB = xor i47 %B, -1
%C1 = and i47 %NotA, %NotB
ret i47 %C1
}
define i15 @test2(i15 %x) {
%tmp.2 = and i15 %x, -1 ; noop
ret i15 %tmp.2
}
define i23 @test3(i23 %x) {
%tmp.0 = and i23 %x, 127
%tmp.2 = and i23 %tmp.0, 128
ret i23 %tmp.2
}
define i1 @test4(i37 %x) {
%A = and i37 %x, -2147483648
%B = icmp ne i37 %A, 0
ret i1 %B
}
define i7 @test5(i7 %A, i7* %P) {
%B = or i7 %A, 3
%C = xor i7 %B, 12
store i7 %C, i7* %P
%r = and i7 %C, 3
ret i7 %r
}
define i7 @test6(i7 %A, i7 %B) {
;; ~(~X & Y) --> (X | ~Y)
%t0 = xor i7 %A, -1
%t1 = and i7 %t0, %B
%r = xor i7 %t1, -1
ret i7 %r
}
define i47 @test7(i47 %A) {
%X = ashr i47 %A, 39 ;; sign extend
%C1 = and i47 %X, 255
ret i47 %C1
}
|
