immcost.ll
2.18 KB
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
; RUN: llc -mtriple=aarch64-none-linux-gnu %s -o - -O1 -debug-only=consthoist 2>&1 | FileCheck %s
; REQUIRES: asserts
declare void @g(i64)
; Single ORR.
; CHECK: Function: f1
; CHECK-NOT: Collect constant
define void @f1(i1 %cond) {
entry:
call void @g(i64 -3)
br i1 %cond, label %true, label %ret
true:
call void @g(i64 -3)
br label %ret
ret:
ret void
}
; Constant is 0xBEEF000000000000, single MOVZ with shift.
; CHECK: Function: f2
; CHECK-NOT: Collect constant
define void @f2(i1 %cond, i64 %p, i64 %q) {
entry:
%a = and i64 %p, 13758215386640154624
call void @g(i64 %a)
br i1 %cond, label %true, label %ret
true:
%b = and i64 %q, 13758215386640154624
call void @g(i64 %b)
br label %ret
ret:
ret void
}
; CHECK: Function: f3
; CHECK: Collect constant i64 4294967103 from %a = and i64 %p, 4294967103 with cost 2
define void @f3(i1 %cond, i64 %p, i64 %q) {
entry:
%a = and i64 %p, 4294967103
call void @g(i64 %a)
br i1 %cond, label %true, label %ret
true:
%b = and i64 %q, 4294967103
call void @g(i64 %b)
br label %ret
ret:
ret void
}
; CHECK: Function: f4
; Collect constant i64 -4688528683866062848 from %a = and i64 %p, -4688528683866062848 with cost 2
define void @f4(i1 %cond, i64 %p, i64 %q) {
entry:
%a = and i64 %p, 13758215389843488768
call void @g(i64 %a)
br i1 %cond, label %true, label %ret
true:
%b = and i64 %q, 13758215389843488768
call void @g(i64 %b)
br label %ret
ret:
ret void
}
; CHECK: Function: f5
; Collect constant i64 88994925642865 from %a = and i64 %p, 88994925642865 with cost 3
define void @f5(i1 %cond, i64 %p, i64 %q) {
entry:
%a = and i64 %p, 88994925642865
call void @g(i64 %a)
br i1 %cond, label %true, label %ret
true:
%b = and i64 %q, 88994925642865
call void @g(i64 %b)
br label %ret
ret:
ret void
}
; CHECK: Function: f6
; Collect constant i64 -4688439692143754127 from %b = and i64 %q, -4688439692143754127 with cost 4
define void @f6(i1 %cond, i64 %p, i64 %q) {
entry:
%a = and i64 %p, 13758304381565797489
call void @g(i64 %a)
br i1 %cond, label %true, label %ret
true:
%b = and i64 %q, 13758304381565797489
call void @g(i64 %b)
br label %ret
ret:
ret void
}