1; RUN: opt -indvars -S %s | FileCheck %s
2;
3; PR18384: ValueHandleBase::ValueIsDeleted.
4;
5; Ensure that LoopSimplify calls ScalarEvolution::forgetLoop before
6; deleting a block, regardless of whether any values were hoisted out
7; of the block.
8
9target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
10target triple = "x86_64-apple-darwin"
11
12%struct.Params = type { [2 x [4 x [16 x i16]]] }
13
14; Verify that the loop tail is deleted, and we don't crash!
15;
16; CHECK-LABEL: @t
17; CHECK-LABEL: for.cond127.preheader:
18; CHECK-NOT: for.cond127:
19; CHECK-LABEL: for.body129:
20define void @t() {
21entry:
22  br label %for.body102
23
24for.body102:
25  br i1 undef, label %for.cond127.preheader, label %for.inc203
26
27for.cond127.preheader:
28  br label %for.body129
29
30for.cond127:
31  %cmp128 = icmp slt i32 %inc191, 2
32  br i1 %cmp128, label %for.body129, label %for.end192
33
34for.body129:
35  %uv.013 = phi i32 [ 0, %for.cond127.preheader ], [ %inc191, %for.cond127 ]
36  %idxprom130 = sext i32 %uv.013 to i64
37  br i1 undef, label %for.cond135.preheader.lr.ph, label %for.end185
38
39for.cond135.preheader.lr.ph:
40  br i1 undef, label %for.cond135.preheader.lr.ph.split.us, label %for.cond135.preheader.lr.ph.split_crit_edge
41
42for.cond135.preheader.lr.ph.split_crit_edge:
43  br label %for.cond135.preheader.lr.ph.split
44
45for.cond135.preheader.lr.ph.split.us:
46  br label %for.cond135.preheader.us
47
48for.cond135.preheader.us:
49  %block_y.09.us = phi i32 [ 0, %for.cond135.preheader.lr.ph.split.us ], [ %add184.us, %for.cond132.us ]
50  br i1 true, label %for.cond138.preheader.lr.ph.us, label %for.end178.us
51
52for.end178.us:
53  %add184.us = add nsw i32 %block_y.09.us, 4
54  br i1 undef, label %for.end185split.us-lcssa.us, label %for.cond132.us
55
56for.end174.us:
57  br i1 undef, label %for.cond138.preheader.us, label %for.cond135.for.end178_crit_edge.us
58
59for.inc172.us:
60  br i1 undef, label %for.cond142.preheader.us, label %for.end174.us
61
62for.body145.us:
63  %arrayidx163.us = getelementptr inbounds %struct.Params* undef, i64 0, i32 0, i64 %idxprom130, i64 %idxprom146.us
64  br i1 undef, label %for.body145.us, label %for.inc172.us
65
66for.cond142.preheader.us:
67  %j.04.us = phi i32 [ %block_y.09.us, %for.cond138.preheader.us ], [ undef, %for.inc172.us ]
68  %idxprom146.us = sext i32 %j.04.us to i64
69  br label %for.body145.us
70
71for.cond138.preheader.us:
72  br label %for.cond142.preheader.us
73
74for.cond132.us:
75  br i1 undef, label %for.cond135.preheader.us, label %for.cond132.for.end185_crit_edge.us-lcssa.us
76
77for.cond138.preheader.lr.ph.us:
78  br label %for.cond138.preheader.us
79
80for.cond135.for.end178_crit_edge.us:
81  br label %for.end178.us
82
83for.end185split.us-lcssa.us:
84  br label %for.end185split
85
86for.cond132.for.end185_crit_edge.us-lcssa.us:
87  br label %for.cond132.for.end185_crit_edge
88
89for.cond135.preheader.lr.ph.split:
90  br label %for.end185split
91
92for.end185split:
93  br label %for.end185
94
95for.cond132.for.end185_crit_edge:
96  br label %for.end185
97
98for.end185:
99  %inc191 = add nsw i32 %uv.013, 1
100  br i1 false, label %for.end192, label %for.cond127
101
102for.end192:
103  br label %for.inc203
104
105for.inc203:
106  br label %for.end205
107
108for.end205:
109  ret void
110}
111