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
|
; Tests to make sure elimination of casts is working correctly
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep '%c' | not grep cast
%inbuf = external global [32832 x ubyte]
implementation
int %test1(int %A) {
%c1 = cast int %A to uint
%c2 = cast uint %c1 to int
ret int %c2
}
ulong %test2(ubyte %A) {
%c1 = cast ubyte %A to ushort
%c2 = cast ushort %c1 to uint
%Ret = cast uint %c2 to ulong
ret ulong %Ret
}
ulong %test3(ulong %A) { ; This function should just use bitwise AND
%c1 = cast ulong %A to ubyte
%c2 = cast ubyte %c1 to ulong
ret ulong %c2
}
uint %test4(int %A, int %B) {
%COND = setlt int %A, %B
%c = cast bool %COND to ubyte ; Booleans are unsigned integrals
%result = cast ubyte %c to uint ; for the cast elim purpose
ret uint %result
}
int %test5(bool %B) {
%c = cast bool %B to ubyte ; This cast should get folded into
%result = cast ubyte %c to int ; this cast
ret int %result
}
int %test6(ulong %A) {
%c1 = cast ulong %A to uint
%res = cast uint %c1 to int
ret int %res
}
long %test7(bool %A) {
%c1 = cast bool %A to int
%res = cast int %c1 to long
ret long %res
}
long %test8(sbyte %A) {
%c1 = cast sbyte %A to ulong
%res = cast ulong %c1 to long
ret long %res
}
short %test9(short %A) {
%c1 = cast short %A to int
%c2 = cast int %c1 to short
ret short %c2
}
short %test10(short %A) {
%c1 = cast short %A to uint
%c2 = cast uint %c1 to short
ret short %c2
}
declare void %varargs(int, ...)
void %test11(int* %P) {
%c = cast int* %P to short*
call void(int, ...)* %varargs(int 5, short* %c)
ret void
}
int* %test12() {
%p = malloc [4 x sbyte]
%c = cast [4 x sbyte]* %p to int*
ret int* %c
}
ubyte *%test13(long %A) {
%c = getelementptr [0 x ubyte]* cast ([32832 x ubyte]* %inbuf to [0 x ubyte]*), long 0, long %A
ret ubyte* %c
}
bool %test14(sbyte %A) {
%c = cast sbyte %A to ubyte
%X = setlt ubyte %c, 128 ; setge %A, 0
ret bool %X
}
bool %test15(ubyte %A) {
%c = cast ubyte %A to sbyte
%X = setlt sbyte %c, 0 ; setgt %A, 127
ret bool %X
}
bool %test16(int* %P) {
%c = cast int* %P to bool ;; setne P, null
ret bool %c
}
short %test17(bool %tmp3) {
%c = cast bool %tmp3 to int
%t86 = cast int %c to short
ret short %t86
}
short %test18(sbyte %tmp3) {
%c = cast sbyte %tmp3 to int
%t86 = cast int %c to short
ret short %t86
}
bool %test19(int %X) {
%Y = cast int %X to long
%Z = setlt long %Y, 12345
ret bool %Z
}
bool %test20(bool %B) {
%C = cast bool %B to int
%D = setlt int %C, -1
ret bool %D ;; false
}
|
