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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
| ; RUN: opt < %s -analyze -block-freq | FileCheck %s
; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s
; Function Attrs: noinline norecurse nounwind readnone uwtable
define i32 @_Z11irreducibleii(i32 %iter_outer, i32 %iter_inner) local_unnamed_addr !prof !27 {
entry:
%cmp24 = icmp sgt i32 %iter_outer, 0
br i1 %cmp24, label %for.body, label %entry.for.cond.cleanup_crit_edge, !prof !28
entry.for.cond.cleanup_crit_edge: ; preds = %entry
br label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.end, %entry.for.cond.cleanup_crit_edge
%sum.0.lcssa = phi i32 [ 0, %entry.for.cond.cleanup_crit_edge ], [ %sum.1, %for.end ]
ret i32 %sum.0.lcssa
for.body: ; preds = %for.end, %entry
%k.026 = phi i32 [ %inc12, %for.end ], [ 0, %entry ]
%sum.025 = phi i32 [ %sum.1, %for.end ], [ 0, %entry ]
%rem23 = and i32 %k.026, 1
%cmp1 = icmp eq i32 %rem23, 0
br i1 %cmp1, label %entry8, label %for.cond2, !prof !29
for.cond2: ; preds = %if.end9, %for.body
%sum.1 = phi i32 [ %add10, %if.end9 ], [ %sum.025, %for.body ]
%i.0 = phi i32 [ %inc, %if.end9 ], [ 0, %for.body ]
%cmp3 = icmp slt i32 %i.0, %iter_inner
br i1 %cmp3, label %for.body4, label %for.end, !prof !30, !irr_loop !31
for.body4: ; preds = %for.cond2
%rem5 = srem i32 %k.026, 3
%cmp6 = icmp eq i32 %rem5, 0
br i1 %cmp6, label %entry8, label %if.end9, !prof !32
entry8: ; preds = %for.body4, %for.body
%sum.2 = phi i32 [ %sum.025, %for.body ], [ %sum.1, %for.body4 ]
%i.1 = phi i32 [ 0, %for.body ], [ %i.0, %for.body4 ]
%add = add nsw i32 %sum.2, 4
br label %if.end9, !irr_loop !33
if.end9: ; preds = %entry8, %for.body4
%sum.3 = phi i32 [ %add, %entry8 ], [ %sum.1, %for.body4 ]
%i.2 = phi i32 [ %i.1, %entry8 ], [ %i.0, %for.body4 ]
%add10 = add nsw i32 %sum.3, 1
%inc = add nsw i32 %i.2, 1
br label %for.cond2, !irr_loop !34
for.end: ; preds = %for.cond2
%inc12 = add nuw nsw i32 %k.026, 1
%exitcond = icmp eq i32 %inc12, %iter_outer
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !prof !35
}
!27 = !{!"function_entry_count", i64 1}
!28 = !{!"branch_weights", i32 1, i32 0}
!29 = !{!"branch_weights", i32 50, i32 50}
!30 = !{!"branch_weights", i32 950, i32 100}
!31 = !{!"loop_header_weight", i64 1050}
!32 = !{!"branch_weights", i32 323, i32 627}
!33 = !{!"loop_header_weight", i64 373}
!34 = !{!"loop_header_weight", i64 1000}
!35 = !{!"branch_weights", i32 1, i32 99}
; CHECK-LABEL: Printing analysis {{.*}} for function '_Z11irreducibleii':
; CHECK-NEXT: block-frequency-info: _Z11irreducibleii
; CHECK-NEXT: - entry: {{.*}} count = 1
; CHECK-NEXT: - entry.for.cond.cleanup_crit_edge: {{.*}} count = 0
; CHECK-NEXT: - for.cond.cleanup: {{.*}} count = 1
; CHECK-NEXT: - for.body: {{.*}} count = 100
; CHECK-NEXT: - for.cond2: {{.*}} count = 1050, irr_loop_header_weight = 1050
; CHECK-NEXT: - for.body4: {{.*}} count = 950
; CHECK-NEXT: - entry8: {{.*}} count = 373, irr_loop_header_weight = 373
; CHECK-NEXT: - if.end9: {{.*}} count = 1000, irr_loop_header_weight = 1000
; CHECK-NEXT: - for.end: {{.*}} count = 100
@targets = local_unnamed_addr global [256 x i8*] zeroinitializer, align 16
@tracing = local_unnamed_addr global i32 0, align 4
; Function Attrs: noinline norecurse nounwind uwtable
define i32 @_Z11irreduciblePh(i8* nocapture readonly %p) !prof !27 {
entry:
%0 = load i32, i32* @tracing, align 4
%1 = trunc i32 %0 to i8
%tobool = icmp eq i32 %0, 0
br label %for.cond1
for.cond1: ; preds = %sw.default, %entry
br label %dispatch_op
dispatch_op: ; preds = %sw.bb6, %for.cond1
switch i8 %1, label %sw.default [
i8 0, label %sw.bb
i8 1, label %dispatch_op.sw.bb6_crit_edge
i8 2, label %sw.bb15
], !prof !36
dispatch_op.sw.bb6_crit_edge: ; preds = %dispatch_op
br label %sw.bb6
sw.bb: ; preds = %indirectgoto, %dispatch_op
br label %exit
TARGET_1: ; preds = %indirectgoto
br label %sw.bb6
sw.bb6: ; preds = %TARGET_1, %dispatch_op.sw.bb6_crit_edge
br i1 %tobool, label %dispatch_op, label %if.then, !prof !37, !irr_loop !38
if.then: ; preds = %sw.bb6
br label %indirectgoto
TARGET_2: ; preds = %indirectgoto
br label %sw.bb15
sw.bb15: ; preds = %TARGET_2, %dispatch_op
br i1 %tobool, label %if.then18, label %exit, !prof !39, !irr_loop !40
if.then18: ; preds = %sw.bb15
br label %indirectgoto
unknown_op: ; preds = %indirectgoto
br label %sw.default
sw.default: ; preds = %unknown_op, %dispatch_op
br label %for.cond1
exit: ; preds = %sw.bb15, %sw.bb
ret i32 0
indirectgoto: ; preds = %if.then18, %if.then
%idxprom21 = zext i32 %0 to i64
%arrayidx22 = getelementptr inbounds [256 x i8*], [256 x i8*]* @targets, i64 0, i64 %idxprom21
%target = load i8*, i8** %arrayidx22, align 8
indirectbr i8* %target, [label %unknown_op, label %sw.bb, label %TARGET_1, label %TARGET_2], !prof !41, !irr_loop !42
}
!36 = !{!"branch_weights", i32 0, i32 0, i32 201, i32 1}
!37 = !{!"branch_weights", i32 201, i32 300}
!38 = !{!"loop_header_weight", i64 501}
!39 = !{!"branch_weights", i32 100, i32 0}
!40 = !{!"loop_header_weight", i64 100}
!41 = !{!"branch_weights", i32 0, i32 1, i32 300, i32 99}
!42 = !{!"loop_header_weight", i64 400}
; CHECK-LABEL: Printing analysis {{.*}} for function '_Z11irreduciblePh':
; CHECK-NEXT: block-frequency-info: _Z11irreduciblePh
; CHECK-NEXT: - entry: {{.*}} count = 1
; CHECK-NEXT: - for.cond1: {{.*}} count = 1
; CHECK-NEXT: - dispatch_op: {{.*}} count = 202
; CHECK-NEXT: - dispatch_op.sw.bb6_crit_edge: {{.*}} count = 201
; CHECK-NEXT: - sw.bb: {{.*}} count = 1
; CHECK-NEXT: - TARGET_1: {{.*}} count = 300
; CHECK-NEXT: - sw.bb6: {{.*}} count = 501, irr_loop_header_weight = 501
; CHECK-NEXT: - if.then: {{.*}} count = 300
; CHECK-NEXT: - TARGET_2: {{.*}} count = 99
; CHECK-NEXT: - sw.bb15: {{.*}} count = 100, irr_loop_header_weight = 100
; CHECK-NEXT: - if.then18: {{.*}} count = 100
; CHECK-NEXT: - unknown_op: {{.*}} count = 0
; CHECK-NEXT: - sw.default: {{.*}} count = 0
; CHECK-NEXT: - exit: {{.*}} count = 1
; CHECK-NEXT: - indirectgoto: {{.*}} count = 400, irr_loop_header_weight = 400
; Missing some irr loop annotations.
; Function Attrs: noinline norecurse nounwind uwtable
define i32 @_Z11irreduciblePh2(i8* nocapture readonly %p) !prof !27 {
entry:
%0 = load i32, i32* @tracing, align 4
%1 = trunc i32 %0 to i8
%tobool = icmp eq i32 %0, 0
br label %for.cond1
for.cond1: ; preds = %sw.default, %entry
br label %dispatch_op
dispatch_op: ; preds = %sw.bb6, %for.cond1
switch i8 %1, label %sw.default [
i8 0, label %sw.bb
i8 1, label %dispatch_op.sw.bb6_crit_edge
i8 2, label %sw.bb15
], !prof !36
dispatch_op.sw.bb6_crit_edge: ; preds = %dispatch_op
br label %sw.bb6
sw.bb: ; preds = %indirectgoto, %dispatch_op
br label %exit
TARGET_1: ; preds = %indirectgoto
br label %sw.bb6
sw.bb6: ; preds = %TARGET_1, %dispatch_op.sw.bb6_crit_edge
br i1 %tobool, label %dispatch_op, label %if.then, !prof !37 ; Missing !irr_loop !38
if.then: ; preds = %sw.bb6
br label %indirectgoto
TARGET_2: ; preds = %indirectgoto
br label %sw.bb15
sw.bb15: ; preds = %TARGET_2, %dispatch_op
br i1 %tobool, label %if.then18, label %exit, !prof !39, !irr_loop !40
if.then18: ; preds = %sw.bb15
br label %indirectgoto
unknown_op: ; preds = %indirectgoto
br label %sw.default
sw.default: ; preds = %unknown_op, %dispatch_op
br label %for.cond1
exit: ; preds = %sw.bb15, %sw.bb
ret i32 0
indirectgoto: ; preds = %if.then18, %if.then
%idxprom21 = zext i32 %0 to i64
%arrayidx22 = getelementptr inbounds [256 x i8*], [256 x i8*]* @targets, i64 0, i64 %idxprom21
%target = load i8*, i8** %arrayidx22, align 8
indirectbr i8* %target, [label %unknown_op, label %sw.bb, label %TARGET_1, label %TARGET_2], !prof !41, !irr_loop !42
}
; CHECK-LABEL: Printing analysis {{.*}} for function '_Z11irreduciblePh2':
; CHECK: block-frequency-info: _Z11irreduciblePh2
; CHECK: - sw.bb6: {{.*}} count = 100
; CHECK: - sw.bb15: {{.*}} count = 100, irr_loop_header_weight = 100
; CHECK: - indirectgoto: {{.*}} count = 400, irr_loop_header_weight = 400
|