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
|
long 12
implementation
ulong "const removal"()
long 12345
%q = uint 4000000000 ; Def 0 - uint plane
ulong 123 ; Def 0 - ulong plane
ulong 4000000000000 ; Def 1 - ulong plane
begin
ret ulong %1
end
void "dce #1"()
int 0
begin
ret void
ret void ; Unreachable label
end
void "basic block merge #1"(int %a, uint %b, bool %c, ulong %d)
begin
add int %0, %0
br label %TestName ; Can be merged with next block
TestName:
add uint %0, %0
br label %1 ; Can be merged with next block
add ulong %0, %0
ret void
end
void "const prop #1"()
%x = int 0 ; Def %x - int plane
int 0 ; Def 0 - int plane
bool false
begin
Startup:
%x = seteq int %0, %x
br bool %x, label %0, label %Startup ; Can be eliminated by const prop
ret void
end
int "const prop #2"()
begin
%x = add int 1, 1 ; Instrs can be const prop'd away
%y = sub int -1, 1
%z = add int %x, %y
ret int %z ; Should equal %0
end
sbyte "const prop #3"() ; Instrs can be const prop'd away
begin
%x = add sbyte 127, 127 ; Must wrap around correctly!
%y = sub sbyte 1, -1
%z = add sbyte %x, %y
ret sbyte %z ; Should equal %0!
end
|
