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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=loop-unroll -unroll-runtime -unroll-count=4 -S | FileCheck %s
; RUN: opt < %s -passes='require<opt-remark-emit>,loop-unroll' -unroll-runtime -unroll-count=4 -S | FileCheck %s
; Check that loop unroll pass correctly handle loops with
; single exiting block not the loop header or latch.
define void @test1(ptr noalias %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A:%.*]], align 4
; CHECK-NEXT: call void @bar(i32 [[TMP0]])
; CHECK-NEXT: br label [[FOR_HEADER:%.*]]
; CHECK: for.header:
; CHECK-NEXT: call void @bar(i32 [[TMP0]])
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: br label [[FOR_BODY_FOR_BODY_CRIT_EDGE:%.*]]
; CHECK: for.body.for.body_crit_edge:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 1
; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE]])
; CHECK-NEXT: br label [[FOR_BODY_1:%.*]]
; CHECK: for.body.1:
; CHECK-NEXT: br label [[FOR_BODY_FOR_BODY_CRIT_EDGE_1:%.*]]
; CHECK: for.body.for.body_crit_edge.1:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 2
; CHECK-NEXT: [[DOTPRE_1:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_1]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE_1]])
; CHECK-NEXT: br label [[FOR_BODY_2:%.*]]
; CHECK: for.body.2:
; CHECK-NEXT: br label [[FOR_BODY_FOR_BODY_CRIT_EDGE_2:%.*]]
; CHECK: for.body.for.body_crit_edge.2:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_2:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 3
; CHECK-NEXT: [[DOTPRE_2:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_2]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE_2]])
; CHECK-NEXT: br label [[FOR_BODY_3:%.*]]
; CHECK: for.body.3:
; CHECK-NEXT: br i1 false, label [[FOR_BODY_FOR_BODY_CRIT_EDGE_3:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.for.body_crit_edge.3:
; CHECK-NEXT: unreachable
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%0 = load i32, ptr %A, align 4
call void @bar(i32 %0)
br label %for.header
for.header:
%1 = phi i32 [ %0, %entry ], [ %.pre, %for.body.for.body_crit_edge ]
%i = phi i64 [ 0, %entry ], [ %inc, %for.body.for.body_crit_edge ]
%arrayidx = getelementptr inbounds i32, ptr %A, i64 %i
call void @bar(i32 %1)
br label %for.body
for.body:
%inc = add nsw i64 %i, 1
%cmp = icmp slt i64 %inc, 4
br i1 %cmp, label %for.body.for.body_crit_edge, label %for.end
for.body.for.body_crit_edge:
%arrayidx.phi.trans.insert = getelementptr inbounds i32, ptr %A, i64 %inc
%.pre = load i32, ptr %arrayidx.phi.trans.insert, align 4
br label %for.header
for.end:
ret void
}
; Check that loop unroll pass correctly handle loops with
; (1) exiting block not dominating the loop latch; and
; (2) exiting terminator instructions cannot be simplified to unconditional.
define void @test2(ptr noalias %A) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 true, label [[FOR_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK: for.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A:%.*]], align 4
; CHECK-NEXT: call void @bar(i32 [[TMP0]])
; CHECK-NEXT: br label [[FOR_HEADER:%.*]]
; CHECK: for.header:
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[FOR_PREHEADER]] ], [ [[DOTPRE_3:%.*]], [[FOR_BODY_FOR_BODY_CRIT_EDGE_3:%.*]] ]
; CHECK-NEXT: [[I:%.*]] = phi i64 [ 0, [[FOR_PREHEADER]] ], [ [[INC_3:%.*]], [[FOR_BODY_FOR_BODY_CRIT_EDGE_3]] ]
; CHECK-NEXT: call void @bar(i32 [[TMP1]])
; CHECK-NEXT: [[INC:%.*]] = add nuw nsw i64 [[I]], 1
; CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[CMP:%.*]] = call i1 @foo(i64 [[I]])
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE]], label [[FOR_END_LOOPEXIT:%.*]]
; CHECK: for.body.for.body_crit_edge:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INC]]
; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE]])
; CHECK-NEXT: [[INC_1:%.*]] = add nuw nsw i64 [[INC]], 1
; CHECK-NEXT: br i1 true, label [[FOR_BODY_1:%.*]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE_1:%.*]]
; CHECK: for.body.1:
; CHECK-NEXT: [[CMP_1:%.*]] = call i1 @foo(i64 [[INC]])
; CHECK-NEXT: br i1 [[CMP_1]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE_1]], label [[FOR_END_LOOPEXIT]]
; CHECK: for.body.for.body_crit_edge.1:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INC_1]]
; CHECK-NEXT: [[DOTPRE_1:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_1]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE_1]])
; CHECK-NEXT: [[INC_2:%.*]] = add nuw nsw i64 [[INC_1]], 1
; CHECK-NEXT: br i1 true, label [[FOR_BODY_2:%.*]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE_2:%.*]]
; CHECK: for.body.2:
; CHECK-NEXT: [[CMP_2:%.*]] = call i1 @foo(i64 [[INC_1]])
; CHECK-NEXT: br i1 [[CMP_2]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE_2]], label [[FOR_END_LOOPEXIT]]
; CHECK: for.body.for.body_crit_edge.2:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_2:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INC_2]]
; CHECK-NEXT: [[DOTPRE_2:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_2]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE_2]])
; CHECK-NEXT: [[INC_3]] = add nsw i64 [[INC_2]], 1
; CHECK-NEXT: br i1 true, label [[FOR_BODY_3:%.*]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE_3]]
; CHECK: for.body.3:
; CHECK-NEXT: [[CMP_3:%.*]] = call i1 @foo(i64 [[INC_2]])
; CHECK-NEXT: br i1 [[CMP_3]], label [[FOR_BODY_FOR_BODY_CRIT_EDGE_3]], label [[FOR_END_LOOPEXIT]]
; CHECK: for.body.for.body_crit_edge.3:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INC_3]]
; CHECK-NEXT: [[DOTPRE_3]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_3]], align 4
; CHECK-NEXT: br label [[FOR_HEADER]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: for.end.loopexit:
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
br i1 true, label %for.preheader, label %for.end
for.preheader:
%0 = load i32, ptr %A, align 4
call void @bar(i32 %0)
br label %for.header
for.header:
%1 = phi i32 [ %0, %for.preheader ], [ %.pre, %for.body.for.body_crit_edge ]
%i = phi i64 [ 0, %for.preheader ], [ %inc, %for.body.for.body_crit_edge ]
%arrayidx = getelementptr inbounds i32, ptr %A, i64 %i
call void @bar(i32 %1)
%inc = add nsw i64 %i, 1
br i1 true, label %for.body, label %for.body.for.body_crit_edge
for.body:
%cmp = call i1 @foo(i64 %i)
br i1 %cmp, label %for.body.for.body_crit_edge, label %for.end
for.body.for.body_crit_edge:
%arrayidx.phi.trans.insert = getelementptr inbounds i32, ptr %A, i64 %inc
%.pre = load i32, ptr %arrayidx.phi.trans.insert, align 4
br label %for.header
for.end:
ret void
}
; Check that loop unroll pass correctly handle loops with
; (1) multiple exiting blocks; and
; (2) loop latch is not an exiting block.
define void @test3(ptr noalias %A, i1 %cond) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A:%.*]], align 4
; CHECK-NEXT: call void @bar(i32 [[TMP0]])
; CHECK-NEXT: br label [[FOR_HEADER:%.*]]
; CHECK: for.header:
; CHECK-NEXT: call void @bar(i32 [[TMP0]])
; CHECK-NEXT: br i1 [[COND:%.*]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: br label [[FOR_BODY_FOR_BODY_CRIT_EDGE:%.*]]
; CHECK: for.body.for.body_crit_edge:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 1
; CHECK-NEXT: [[DOTPRE:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE]])
; CHECK-NEXT: br i1 [[COND]], label [[FOR_BODY_1:%.*]], label [[FOR_END]]
; CHECK: for.body.1:
; CHECK-NEXT: br label [[FOR_BODY_FOR_BODY_CRIT_EDGE_1:%.*]]
; CHECK: for.body.for.body_crit_edge.1:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 2
; CHECK-NEXT: [[DOTPRE_1:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_1]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE_1]])
; CHECK-NEXT: br i1 [[COND]], label [[FOR_BODY_2:%.*]], label [[FOR_END]]
; CHECK: for.body.2:
; CHECK-NEXT: br label [[FOR_BODY_FOR_BODY_CRIT_EDGE_2:%.*]]
; CHECK: for.body.for.body_crit_edge.2:
; CHECK-NEXT: [[ARRAYIDX_PHI_TRANS_INSERT_2:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 3
; CHECK-NEXT: [[DOTPRE_2:%.*]] = load i32, ptr [[ARRAYIDX_PHI_TRANS_INSERT_2]], align 4
; CHECK-NEXT: call void @bar(i32 [[DOTPRE_2]])
; CHECK-NEXT: br i1 [[COND]], label [[FOR_BODY_3:%.*]], label [[FOR_END]]
; CHECK: for.body.3:
; CHECK-NEXT: br i1 false, label [[FOR_BODY_FOR_BODY_CRIT_EDGE_3:%.*]], label [[FOR_END]]
; CHECK: for.body.for.body_crit_edge.3:
; CHECK-NEXT: unreachable
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
%0 = load i32, ptr %A, align 4
call void @bar(i32 %0)
br label %for.header
for.header:
%1 = phi i32 [ %0, %entry ], [ %.pre, %for.body.for.body_crit_edge ]
%i = phi i64 [ 0, %entry ], [ %inc, %for.body.for.body_crit_edge ]
%arrayidx = getelementptr inbounds i32, ptr %A, i64 %i
call void @bar(i32 %1)
br i1 %cond, label %for.body, label %for.end
for.body:
%inc = add nsw i64 %i, 1
%cmp = icmp slt i64 %inc, 4
br i1 %cmp, label %for.body.for.body_crit_edge, label %for.end
for.body.for.body_crit_edge:
%arrayidx.phi.trans.insert = getelementptr inbounds i32, ptr %A, i64 %inc
%.pre = load i32, ptr %arrayidx.phi.trans.insert, align 4
br label %for.header
for.end:
ret void
}
; Test it doesn't crash.
define void @test4(i32 %arg) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: bb:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br i1 false, label [[BB4:%.*]], label [[BB1_1:%.*]]
; CHECK: bb1.1:
; CHECK-NEXT: br i1 false, label [[BB4]], label [[BB1_2:%.*]]
; CHECK: bb1.2:
; CHECK-NEXT: br i1 false, label [[BB4]], label [[BB1_3:%.*]]
; CHECK: bb1.3:
; CHECK-NEXT: br i1 false, label [[BB4]], label [[BB1]], !llvm.loop [[LOOP2:![0-9]+]]
; CHECK: bb4:
; CHECK-NEXT: unreachable
;
bb:
br label %bb1
bb1: ; preds = %bb1, %bb
%tmp = phi i64 [ 0, %bb ], [ 65, %bb1 ]
%tmp2 = phi i32 [ %arg, %bb ], [ %tmp3, %bb1 ]
%tmp3 = add i32 0, -1880031232
br i1 false, label %bb4, label %bb1
bb4: ; preds = %bb1
unreachable
}
declare void @bar(i32)
declare i1 @foo(i64)
|
