source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/BlockFrequencyInfo/double_exit.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

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1; RUN: opt < %s -analyze -block-freq | FileCheck %s
2
3; CHECK-LABEL: Printing analysis {{.*}} for function 'double_exit':
4; CHECK-NEXT: block-frequency-info: double_exit
5define i32 @double_exit(i32 %N) {
6; Mass = 1
7; Frequency = 1
8; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
9entry:
10  br label %outer
11
12; Mass = 1
13; Backedge mass = 1/3, exit mass = 2/3
14; Loop scale = 3/2
15; Pseudo-edges = exit
16; Pseudo-mass = 1
17; Frequency = 1*3/2*1 = 3/2
18; CHECK-NEXT: outer: float = 1.5,
19outer:
20  %I.0 = phi i32 [ 0, %entry ], [ %inc6, %outer.inc ]
21  %Return.0 = phi i32 [ 0, %entry ], [ %Return.1, %outer.inc ]
22  %cmp = icmp slt i32 %I.0, %N
23  br i1 %cmp, label %inner, label %exit, !prof !2 ; 2:1
24
25; Mass = 1
26; Backedge mass = 3/5, exit mass = 2/5
27; Loop scale = 5/2
28; Pseudo-edges = outer.inc @ 1/5, exit @ 1/5
29; Pseudo-mass = 2/3
30; Frequency = 3/2*1*5/2*2/3 = 5/2
31; CHECK-NEXT: inner: float = 2.5,
32inner:
33  %Return.1 = phi i32 [ %Return.0, %outer ], [ %call4, %inner.inc ]
34  %J.0 = phi i32 [ %I.0, %outer ], [ %inc, %inner.inc ]
35  %cmp2 = icmp slt i32 %J.0, %N
36  br i1 %cmp2, label %inner.body, label %outer.inc, !prof !1 ; 4:1
37
38; Mass = 4/5
39; Frequency = 5/2*4/5 = 2
40; CHECK-NEXT: inner.body: float = 2.0,
41inner.body:
42  %call = call i32 @c2(i32 %I.0, i32 %J.0)
43  %tobool = icmp ne i32 %call, 0
44  br i1 %tobool, label %exit, label %inner.inc, !prof !0 ; 3:1
45
46; Mass = 3/5
47; Frequency = 5/2*3/5 = 3/2
48; CHECK-NEXT: inner.inc: float = 1.5,
49inner.inc:
50  %call4 = call i32 @logic2(i32 %Return.1, i32 %I.0, i32 %J.0)
51  %inc = add nsw i32 %J.0, 1
52  br label %inner
53
54; Mass = 1/3
55; Frequency = 3/2*1/3 = 1/2
56; CHECK-NEXT: outer.inc: float = 0.5,
57outer.inc:
58  %inc6 = add nsw i32 %I.0, 1
59  br label %outer
60
61; Mass = 1
62; Frequency = 1
63; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
64exit:
65  %Return.2 = phi i32 [ %Return.1, %inner.body ], [ %Return.0, %outer ]
66  ret i32 %Return.2
67}
68
69!0 = !{!"branch_weights", i32 1, i32 3}
70!1 = !{!"branch_weights", i32 4, i32 1}
71!2 = !{!"branch_weights", i32 2, i32 1}
72
73declare i32 @c2(i32, i32)
74declare i32 @logic2(i32, i32, i32)
75
76; CHECK-LABEL: Printing analysis {{.*}} for function 'double_exit_in_loop':
77; CHECK-NEXT: block-frequency-info: double_exit_in_loop
78define i32 @double_exit_in_loop(i32 %N) {
79; Mass = 1
80; Frequency = 1
81; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
82entry:
83  br label %outer
84
85; Mass = 1
86; Backedge mass = 1/2, exit mass = 1/2
87; Loop scale = 2
88; Pseudo-edges = exit
89; Pseudo-mass = 1
90; Frequency = 1*2*1 = 2
91; CHECK-NEXT: outer: float = 2.0,
92outer:
93  %I.0 = phi i32 [ 0, %entry ], [ %inc12, %outer.inc ]
94  %Return.0 = phi i32 [ 0, %entry ], [ %Return.3, %outer.inc ]
95  %cmp = icmp slt i32 %I.0, %N
96  br i1 %cmp, label %middle, label %exit, !prof !3 ; 1:1
97
98; Mass = 1
99; Backedge mass = 1/3, exit mass = 2/3
100; Loop scale = 3/2
101; Pseudo-edges = outer.inc
102; Pseudo-mass = 1/2
103; Frequency = 2*1*3/2*1/2 = 3/2
104; CHECK-NEXT: middle: float = 1.5,
105middle:
106  %J.0 = phi i32 [ %I.0, %outer ], [ %inc9, %middle.inc ]
107  %Return.1 = phi i32 [ %Return.0, %outer ], [ %Return.2, %middle.inc ]
108  %cmp2 = icmp slt i32 %J.0, %N
109  br i1 %cmp2, label %inner, label %outer.inc, !prof !2 ; 2:1
110
111; Mass = 1
112; Backedge mass = 3/5, exit mass = 2/5
113; Loop scale = 5/2
114; Pseudo-edges = middle.inc @ 1/5, outer.inc @ 1/5
115; Pseudo-mass = 2/3
116; Frequency = 3/2*1*5/2*2/3 = 5/2
117; CHECK-NEXT: inner: float = 2.5,
118inner:
119  %Return.2 = phi i32 [ %Return.1, %middle ], [ %call7, %inner.inc ]
120  %K.0 = phi i32 [ %J.0, %middle ], [ %inc, %inner.inc ]
121  %cmp5 = icmp slt i32 %K.0, %N
122  br i1 %cmp5, label %inner.body, label %middle.inc, !prof !1 ; 4:1
123
124; Mass = 4/5
125; Frequency = 5/2*4/5 = 2
126; CHECK-NEXT: inner.body: float = 2.0,
127inner.body:
128  %call = call i32 @c3(i32 %I.0, i32 %J.0, i32 %K.0)
129  %tobool = icmp ne i32 %call, 0
130  br i1 %tobool, label %outer.inc, label %inner.inc, !prof !0 ; 3:1
131
132; Mass = 3/5
133; Frequency = 5/2*3/5 = 3/2
134; CHECK-NEXT: inner.inc: float = 1.5,
135inner.inc:
136  %call7 = call i32 @logic3(i32 %Return.2, i32 %I.0, i32 %J.0, i32 %K.0)
137  %inc = add nsw i32 %K.0, 1
138  br label %inner
139
140; Mass = 1/3
141; Frequency = 3/2*1/3 = 1/2
142; CHECK-NEXT: middle.inc: float = 0.5,
143middle.inc:
144  %inc9 = add nsw i32 %J.0, 1
145  br label %middle
146
147; Mass = 1/2
148; Frequency = 2*1/2 = 1
149; CHECK-NEXT: outer.inc: float = 1.0,
150outer.inc:
151  %Return.3 = phi i32 [ %Return.2, %inner.body ], [ %Return.1, %middle ]
152  %inc12 = add nsw i32 %I.0, 1
153  br label %outer
154
155; Mass = 1
156; Frequency = 1
157; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
158exit:
159  ret i32 %Return.0
160}
161
162!3 = !{!"branch_weights", i32 1, i32 1}
163
164declare i32 @c3(i32, i32, i32)
165declare i32 @logic3(i32, i32, i32, i32)
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