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
|
; RUN: llc -mcpu=corei7 -mtriple=x86_64-linux < %s | FileCheck %s
; RUN: llc -mcpu=corei7 -mtriple=x86_64-linux -precise-rotation-cost < %s | FileCheck %s -check-prefix=CHECK-PROFILE
define void @foo() {
; Test that not all edges in the loop chain are fall through without profile
; data.
;
; CHECK-LABEL: foo:
; CHECK: callq e
; CHECK: callq f
; CHECK: callq g
; CHECK: callq h
entry:
br label %header
header:
call void @e()
%call = call zeroext i1 @a()
br i1 %call, label %if.then, label %if.else, !prof !2
if.then:
call void @f()
br label %if.end
if.else:
call void @g()
br label %if.end
if.end:
call void @h()
%call2 = call zeroext i1 @a()
br i1 %call2, label %header, label %end
end:
ret void
}
define void @bar() !prof !1 {
; Test that all edges in the loop chain are fall through with profile data.
;
; CHECK-PROFILE-LABEL: bar:
; CHECK-PROFILE: callq g
; CHECK-PROFILE: callq h
; CHECK-PROFILE: callq e
; CHECK-PROFILE: callq f
entry:
br label %header
header:
call void @e()
%call = call zeroext i1 @a()
br i1 %call, label %if.then, label %if.else, !prof !2
if.then:
call void @f()
br label %if.end
if.else:
call void @g()
br label %if.end
if.end:
call void @h()
%call2 = call zeroext i1 @a()
br i1 %call2, label %header, label %end
end:
ret void
}
declare zeroext i1 @a()
declare void @e()
declare void @f()
declare void @g()
declare void @h()
!1 = !{!"function_entry_count", i64 1}
!2 = !{!"branch_weights", i32 16, i32 16}
|
