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
|
; RUN: llc < %s -march=avr | FileCheck %s
; RUN: llc < %s -march=avr -mcpu=avr5 | FileCheck -check-prefix=AVR5 %s
; CHECK-LABEL: relax_breq
; CHECK: cpi r{{[0-9]+}}, 0
; CHECK: brne .LBB0_1
; CHECK: rjmp .LBB0_2
; CHECK: .LBB0_1:
; CHECK: nop
; CHECK: .LBB0_2:
; AVR5-LABEL: relax_breq
; AVR5: andi r24, 1
; AVR5: cpi r24, 0
; AVR5: brne .LBB0_1
; AVR5: rjmp .LBB0_2
; AVR5: .LBB0_1:
; AVR5: nop
; AVR5: .LBB0_2:
define i8 @relax_breq(i1 %a) {
entry-block:
br i1 %a, label %hello, label %finished
hello:
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
br label %finished
finished:
ret i8 3
}
; CHECK-LABEL: no_relax_breq
; CHECK: cpi r{{[0-9]+}}, 0
; CHECK: breq [[END_BB:.LBB[0-9]+_[0-9]+]]
; CHECK: nop
; CHECK: [[END_BB]]
; AVR5-LABEL: no_relax_breq
; AVR5: cpi r{{[0-9]+}}, 0
; AVR5: breq [[END_BB:.LBB[0-9]+_[0-9]+]]
; AVR5: nop
; AVR5: [[END_BB]]
define i8 @no_relax_breq(i1 %a) {
entry-block:
br i1 %a, label %hello, label %finished
hello:
; There are not enough NOPs to require relaxation.
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
call void asm sideeffect "nop", ""()
br label %finished
finished:
ret i8 3
}
|
