1; Check that we don't crash on corner cases.
2; RUN: opt < %s -S -loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=1 -unroll-max-percent-threshold-boost=200 -o /dev/null
3; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop(loop-unroll-full)' -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=1 -unroll-max-percent-threshold-boost=200 -o /dev/null
4target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
5
6@known_constant = internal unnamed_addr constant [10 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 16
7
8define void @foo1() {
9entry:
10  br label %for.body
11
12for.body:
13  %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
14  %idx = zext i32 undef to i64
15  %add.ptr = getelementptr inbounds i64, i64* null, i64 %idx
16  %inc = add nuw nsw i64 %phi, 1
17  %cmp = icmp ult i64 %inc, 999
18  br i1 %cmp, label %for.body, label %for.exit
19
20for.exit:
21  ret void
22}
23
24define void @foo2() {
25entry:
26  br label %for.body
27
28for.body:
29  %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
30  %x = getelementptr i32, <4 x i32*> undef, <4 x i32> <i32 1, i32 1, i32 1, i32 1>
31  %inc = add nuw nsw i64 %phi, 1
32  %cmp = icmp ult i64 %inc, 999
33  br i1 %cmp, label %for.body, label %for.exit
34
35for.exit:
36  ret void
37}
38
39define void @cmp_undef() {
40entry:
41  br label %for.body
42
43for.body:                                         ; preds = %for.inc, %entry
44  %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ]
45  %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
46  %x1 = load i32, i32* %arrayidx1, align 4
47  %cmp = icmp eq i32 %x1, undef
48  br i1 %cmp, label %if.then, label %for.inc
49
50if.then:                                          ; preds = %for.body
51  br label %for.inc
52
53for.inc:                                          ; preds = %for.body, %if.then
54  %iv.1 = add nuw nsw i64 %iv.0, 1
55  %exitcond = icmp eq i64 %iv.1, 10
56  br i1 %exitcond, label %for.end, label %for.body
57
58for.end:                                          ; preds = %for.inc
59  ret void
60}
61
62define void @switch() {
63entry:
64  br label %for.body
65
66for.body:
67  %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.inc ]
68  %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
69  %x1 = load i32, i32* %arrayidx1, align 4
70  switch i32 %x1, label %l1 [
71  ]
72
73l1:
74  %x2 = add i32 %x1, 2
75  br label %for.inc
76
77for.inc:
78  %iv.1 = add nuw nsw i64 %iv.0, 1
79  %exitcond = icmp eq i64 %iv.1, 10
80  br i1 %exitcond, label %for.end, label %for.body
81
82for.end:
83  ret void
84}
85
86define <4 x i32> @vec_load() {
87entry:
88  br label %for.body
89
90for.body:
91  %phi = phi i64 [ 0, %entry ], [ %inc, %for.body ]
92  %vec_phi = phi <4 x i32> [ <i32 0, i32 0, i32 0, i32 0>, %entry ], [ %r, %for.body ]
93  %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %phi
94  %bc = bitcast i32* %arrayidx to <4 x i32>*
95  %x = load <4 x i32>, < 4 x i32>* %bc, align 4
96  %r = add <4 x i32> %x, %vec_phi
97  %inc = add nuw nsw i64 %phi, 1
98  %cmp = icmp ult i64 %inc, 999
99  br i1 %cmp, label %for.body, label %for.exit
100
101for.exit:
102  ret <4 x i32> %r
103}
104
105define void @ptrtoint_cast() optsize {
106entry:
107  br label %for.body
108
109for.body:
110  br i1 true, label %for.inc, label %if.then
111
112if.then:
113  %arraydecay = getelementptr inbounds [1 x i32], [1 x i32]* null, i64 0, i64 0
114  %x = ptrtoint i32* %arraydecay to i64
115  br label %for.inc
116
117for.inc:
118  br i1 false, label %for.body, label %for.cond.cleanup
119
120for.cond.cleanup:
121  ret void
122}
123
124define void @ptrtoint_cast2() {
125entry:
126  br i1 false, label %for.body.lr.ph, label %exit
127
128for.body.lr.ph:
129  br label %for.body
130
131for.body:
132  %iv = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
133  %offset = getelementptr inbounds float, float* null, i32 3
134  %bc = bitcast float* %offset to i64*
135  %inc = add nuw nsw i32 %iv, 1
136  br i1 false, label %for.body, label %exit
137
138exit:
139  ret void
140}
141
142@i = external global i32, align 4
143
144define void @folded_not_to_constantint() {
145entry:
146  br label %for.body
147
148for.body:
149  %iv = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
150  %m = phi i32* [ @i, %entry ], [ %m, %for.inc ]
151  br i1 undef, label %if.else, label %if.then
152
153if.then:
154  unreachable
155
156if.else:
157  %cmp = icmp ult i32* %m, null
158  br i1 %cmp, label %cond.false, label %for.inc
159
160cond.false:
161  unreachable
162
163for.inc:
164  %inc = add nuw nsw i32 %iv, 1
165  %cmp2 = icmp ult i32 %inc, 10
166  br i1 %cmp2, label %for.body, label %for.end
167
168for.end:
169  ret void
170}
171
172define void @index_too_large() {
173entry:
174  br label %for.body
175
176for.body:
177  %iv = phi i64 [ -73631599, %entry ], [ %iv.next, %for.inc ]
178  br i1 undef, label %for.body2, label %for.inc
179
180for.body2:
181  %idx = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv
182  %x = load i32, i32* %idx, align 1
183  br label %for.inc
184
185for.inc:
186  %iv.next = add nsw i64 %iv, -1
187  br i1 undef, label %for.body, label %for.end
188
189for.end:
190  ret void
191}
192
193define void @cmp_type_mismatch() {
194entry:
195  br label %for.header
196
197for.header:
198  br label %for.body
199
200for.body:
201  %d = phi i32* [ null, %for.header ]
202  %cmp = icmp eq i32* %d, null
203  br i1 undef, label %for.end, label %for.header
204
205for.end:
206  ret void
207}
208
209define void @load_type_mismatch() {
210entry:
211  br label %for.body
212
213for.body:
214  %iv.0 = phi i64 [ 0, %entry ], [ %iv.1, %for.body ]
215  %arrayidx1 = getelementptr inbounds [10 x i32], [10 x i32]* @known_constant, i64 0, i64 %iv.0
216  %bc = bitcast i32* %arrayidx1 to i64*
217  %x1 = load i64, i64* %bc, align 4
218  %x2 = add i64 10, %x1
219  %iv.1 = add nuw nsw i64 %iv.0, 1
220  %exitcond = icmp eq i64 %iv.1, 10
221  br i1 %exitcond, label %for.end, label %for.body
222
223for.end:
224  ret void
225}
226