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
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
| ; RUN: opt -mtriple=thumbv8m.main -mcpu=cortex-m33 -loop-unroll -S < %s -o - | FileCheck %s
; RUN: opt -mtriple=thumbv7em -mcpu=cortex-m7 -loop-unroll -S < %s -o - | FileCheck %s
;CHECK-LABEL: test_three_blocks
;CHECK: for.body.epil:
;CHECK: if.then.epil:
;CHECK: for.inc.epil:
;CHECK: for.body:
;CHECK: if.then:
;CHECK: for.inc:
;CHECK: for.body.epil.1:
;CHECK: if.then.epil.1:
;CHECK: for.inc.epil.1:
;CHECK: for.body.epil.2:
;CHECK: if.then.epil.2:
;CHECK: for.inc.epil.2:
;CHECK: if.then.1:
;CHECK: for.inc.1:
;CHECK: if.then.2:
;CHECK: for.inc.2:
;CHECK: if.then.3:
;CHECK: for.inc.3:
define void @test_three_blocks(i32* nocapture %Output,
i32* nocapture readonly %Condition,
i32* nocapture readonly %Input,
i32 %MaxJ) {
entry:
%cmp8 = icmp eq i32 %MaxJ, 0
br i1 %cmp8, label %for.cond.cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.cond.cleanup: ; preds = %for.inc, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.1, %for.inc ]
store i32 %temp.0.lcssa, i32* %Output, align 4
ret void
for.body: ; preds = %for.body.preheader, %for.inc
%j.010 = phi i32 [ %inc, %for.inc ], [ 0, %for.body.preheader ]
%temp.09 = phi i32 [ %temp.1, %for.inc ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %Condition, i32 %j.010
%0 = load i32, i32* %arrayidx, align 4
%tobool = icmp eq i32 %0, 0
br i1 %tobool, label %for.inc, label %if.then
if.then: ; preds = %for.body
%arrayidx1 = getelementptr inbounds i32, i32* %Input, i32 %j.010
%1 = load i32, i32* %arrayidx1, align 4
%add = add i32 %1, %temp.09
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%temp.1 = phi i32 [ %add, %if.then ], [ %temp.09, %for.body ]
%inc = add nuw i32 %j.010, 1
%exitcond = icmp eq i32 %inc, %MaxJ
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
;CHECK-LABEL: test_two_exits
;CHECK: for.body:
;CHECK: if.end:
;CHECK: cleanup.loopexit:
;CHECK: cleanup:
;CHECK: for.body.1:
;CHECK: if.end.1:
;CHECK: for.body.2:
;CHECK: if.end.2:
;CHECK: for.body.3:
;CHECK: if.end.3:
define void @test_two_exits(i32* nocapture %Output,
i32* nocapture readonly %Condition,
i32* nocapture readonly %Input,
i32 %MaxJ) {
entry:
%cmp14 = icmp eq i32 %MaxJ, 0
br i1 %cmp14, label %cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %if.end
%j.016 = phi i32 [ %inc, %if.end ], [ 0, %for.body.preheader ]
%temp.015 = phi i32 [ %temp.0.add, %if.end ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %Input, i32 %j.016
%0 = load i32, i32* %arrayidx, align 4
%cmp1 = icmp ugt i32 %0, 65535
br i1 %cmp1, label %cleanup, label %if.end
if.end: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, i32* %Condition, i32 %j.016
%1 = load i32, i32* %arrayidx2, align 4
%tobool = icmp eq i32 %1, 0
%add = select i1 %tobool, i32 0, i32 %0
%temp.0.add = add i32 %add, %temp.015
%inc = add nuw i32 %j.016, 1
%cmp = icmp ult i32 %inc, %MaxJ
br i1 %cmp, label %for.body, label %cleanup
cleanup: ; preds = %if.end, %for.body, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.015, %for.body ], [ %temp.0.add, %if.end ]
store i32 %temp.0.lcssa, i32* %Output, align 4
ret void
}
;CHECK-LABEL: test_three_exits
;CHECK-NOT: for.body.epil
;CHECK-NOT: if.end.epil
;CHECK-LABEL: for.body
;CHECK-LABEL: if.end
;CHECK-LABEL: if.end5
define void @test_three_exits(i32* nocapture %Output,
i32* nocapture readonly %Condition,
i32* nocapture readonly %Input,
i32 %MaxJ) {
entry:
%cmp20 = icmp eq i32 %MaxJ, 0
br i1 %cmp20, label %cleanup, label %for.body.preheader
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %if.end5
%j.022 = phi i32 [ %inc, %if.end5 ], [ 0, %for.body.preheader ]
%temp.021 = phi i32 [ %temp.0.add, %if.end5 ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %Condition, i32 %j.022
%0 = load i32, i32* %arrayidx, align 4
%cmp1 = icmp ugt i32 %0, 65535
br i1 %cmp1, label %cleanup, label %if.end
if.end: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, i32* %Input, i32 %j.022
%1 = load i32, i32* %arrayidx2, align 4
%cmp3 = icmp ugt i32 %1, 65535
br i1 %cmp3, label %cleanup, label %if.end5
if.end5: ; preds = %if.end
%tobool = icmp eq i32 %0, 0
%add = select i1 %tobool, i32 0, i32 %1
%temp.0.add = add i32 %add, %temp.021
%inc = add nuw i32 %j.022, 1
%cmp = icmp ult i32 %inc, %MaxJ
br i1 %cmp, label %for.body, label %cleanup
cleanup: ; preds = %if.end5, %for.body, %if.end, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.021, %if.end ], [ %temp.021, %for.body ], [ %temp.0.add, %if.end5 ]
store i32 %temp.0.lcssa, i32* %Output, align 4
ret void
}
;CHECK-LABEL: test_four_blocks
;CHECK: for.body.epil:
;CHECK: if.else.epil:
;CHECK: if.then.epil:
;CHECK: for.cond.cleanup:
;CHECK: for.body:
;CHECK: if.then:
;CHECK: for.inc:
;CHECK: for.body.epil.1:
;CHECK: if.else.epil.1:
;CHECK: if.then.epil.1:
;CHECK: for.inc.epil.1:
;CHECK: for.body.epil.2:
;CHECK: if.else.epil.2:
;CHECK: if.then.epil.2:
;CHECK: for.inc.epil.2:
;CHECK: if.else.1:
;CHECK: if.then.1:
;CHECK: for.inc.1:
;CHECK: if.else.2:
;CHECK: if.then.2:
;CHECK: for.inc.2:
;CHECK: if.else.3:
;CHECK: if.then.3:
;CHECK: for.inc.3:
define void @test_four_blocks(i32* nocapture %Output,
i32* nocapture readonly %Condition,
i32* nocapture readonly %Input,
i32 %MaxJ) {
entry:
%cmp25 = icmp ugt i32 %MaxJ, 1
br i1 %cmp25, label %for.body.lr.ph, label %for.cond.cleanup
for.body.lr.ph: ; preds = %entry
%.pre = load i32, i32* %Input, align 4
br label %for.body
for.cond.cleanup: ; preds = %for.inc, %entry
%temp.0.lcssa = phi i32 [ 0, %entry ], [ %temp.1, %for.inc ]
store i32 %temp.0.lcssa, i32* %Output, align 4
ret void
for.body: ; preds = %for.inc, %for.body.lr.ph
%0 = phi i32 [ %.pre, %for.body.lr.ph ], [ %2, %for.inc ]
%j.027 = phi i32 [ 1, %for.body.lr.ph ], [ %inc, %for.inc ]
%temp.026 = phi i32 [ 0, %for.body.lr.ph ], [ %temp.1, %for.inc ]
%arrayidx = getelementptr inbounds i32, i32* %Condition, i32 %j.027
%1 = load i32, i32* %arrayidx, align 4
%cmp1 = icmp ugt i32 %1, 65535
%arrayidx2 = getelementptr inbounds i32, i32* %Input, i32 %j.027
%2 = load i32, i32* %arrayidx2, align 4
%cmp4 = icmp ugt i32 %2, %0
br i1 %cmp1, label %if.then, label %if.else
if.then: ; preds = %for.body
%cond = zext i1 %cmp4 to i32
%add = add i32 %temp.026, %cond
br label %for.inc
if.else: ; preds = %for.body
%not.cmp4 = xor i1 %cmp4, true
%sub = sext i1 %not.cmp4 to i32
%sub10.sink = add i32 %j.027, %sub
%arrayidx11 = getelementptr inbounds i32, i32* %Input, i32 %sub10.sink
%3 = load i32, i32* %arrayidx11, align 4
%sub13 = sub i32 %temp.026, %3
br label %for.inc
for.inc: ; preds = %if.then, %if.else
%temp.1 = phi i32 [ %add, %if.then ], [ %sub13, %if.else ]
%inc = add nuw i32 %j.027, 1
%exitcond = icmp eq i32 %inc, %MaxJ
br i1 %exitcond, label %for.cond.cleanup, label %for.body
}
;CHECK-LABEL: test_five_blocks
;CHECK-NOT: for.body.epil:
;CHECK: for.body:
;CHECK: if.end:
;CHECK: if.else:
;CHECK: for.inc:
;CHECK-NOT: for.inc.1:
define void @test_five_blocks(i32* nocapture %Output,
i32* nocapture readonly %Condition,
i32* nocapture readonly %Input,
i32 %MaxJ) {
entry:
%cmp24 = icmp ugt i32 %MaxJ, 1
br i1 %cmp24, label %for.body.preheader, label %cleanup
for.body.preheader: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.preheader, %for.inc
%j.026 = phi i32 [ %inc, %for.inc ], [ 1, %for.body.preheader ]
%temp.025 = phi i32 [ %temp.1, %for.inc ], [ 0, %for.body.preheader ]
%arrayidx = getelementptr inbounds i32, i32* %Input, i32 %j.026
%0 = load i32, i32* %arrayidx, align 4
%add = add i32 %0, %temp.025
%cmp1 = icmp ugt i32 %add, 16777215
br i1 %cmp1, label %cleanup, label %if.end
if.end: ; preds = %for.body
%arrayidx2 = getelementptr inbounds i32, i32* %Condition, i32 %j.026
%1 = load i32, i32* %arrayidx2, align 4
%cmp3 = icmp ugt i32 %1, 65535
br i1 %cmp3, label %if.then4, label %if.else
if.then4: ; preds = %if.end
%sub = add i32 %j.026, -1
%arrayidx6 = getelementptr inbounds i32, i32* %Input, i32 %sub
%2 = load i32, i32* %arrayidx6, align 4
%cmp7 = icmp ugt i32 %0, %2
%cond = zext i1 %cmp7 to i32
%add8 = add i32 %add, %cond
br label %for.inc
if.else: ; preds = %if.end
%and = and i32 %add, %0
br label %for.inc
for.inc: ; preds = %if.then4, %if.else
%temp.1 = phi i32 [ %add8, %if.then4 ], [ %and, %if.else ]
%inc = add nuw i32 %j.026, 1
%cmp = icmp ult i32 %inc, %MaxJ
br i1 %cmp, label %for.body, label %cleanup
cleanup: ; preds = %for.inc, %for.body, %entry
%temp.2 = phi i32 [ 0, %entry ], [ %add, %for.body ], [ %temp.1, %for.inc ]
store i32 %temp.2, i32* %Output, align 4
ret void
}
;CHECK-LABEL: iterate_inc
;CHECK: while.body:
;CHECK: while.end:
;CHECK: while.body.1:
;CHECK: while.body.2:
;CHECK: while.body.3:
%struct.Node = type { %struct.Node*, i32 }
define void @iterate_inc(%struct.Node* %n, i32 %limit) {
entry:
%tobool5 = icmp eq %struct.Node* %n, null
br i1 %tobool5, label %while.end, label %land.rhs.preheader
land.rhs.preheader: ; preds = %entry
br label %land.rhs
land.rhs: ; preds = %land.rhs.preheader, %while.body
%list.addr.06 = phi %struct.Node* [ %2, %while.body ], [ %n, %land.rhs.preheader ]
%val = getelementptr inbounds %struct.Node, %struct.Node* %list.addr.06, i32 0, i32 1
%0 = load i32, i32* %val, align 4
%cmp = icmp slt i32 %0, %limit
br i1 %cmp, label %while.body, label %while.end
while.body: ; preds = %land.rhs
%inc = add nsw i32 %0, 1
store i32 %inc, i32* %val, align 4
%1 = bitcast %struct.Node* %list.addr.06 to %struct.Node**
%2 = load %struct.Node*, %struct.Node** %1, align 4
%tobool = icmp eq %struct.Node* %2, null
br i1 %tobool, label %while.end, label %land.rhs
while.end: ; preds = %land.rhs, %while.body, %entry
ret void
}
|