1; RUN: opt -S < %s -indvars | opt -analyze -iv-users | grep {%cmp = icmp slt i32} | grep {= \{%\\.ph,+,1\}<%for.cond>}
2; PR8079
3
4; LoopSimplify should invalidate indvars when splitting out the
5; inner loop.
6
7@maxStat = external global i32
8
9define i32 @test() nounwind {
10entry:
11  br label %for.cond
12
13for.cond:                                         ; preds = %if.then5, %if.end, %entry
14  %cuts.1 = phi i32 [ 0, %entry ], [ %inc, %if.then5 ], [ %cuts.1, %if.end ]
15  %0 = phi i32 [ 0, %entry ], [ %add, %if.end ], [ %add, %if.then5 ]
16  %add = add i32 %0, 1
17  %cmp = icmp slt i32 %0, 1
18  %tmp1 = load i32* @maxStat, align 4
19  br i1 %cmp, label %for.body, label %for.cond14.preheader
20
21for.cond14.preheader:                             ; preds = %for.cond
22  %cmp1726 = icmp sgt i32 %tmp1, 0
23  br i1 %cmp1726, label %for.body18, label %return
24
25for.body:                                         ; preds = %for.cond
26  %cmp2 = icmp sgt i32 %tmp1, 100
27  br i1 %cmp2, label %return, label %if.end
28
29if.end:                                           ; preds = %for.body
30  %cmp4 = icmp sgt i32 %tmp1, -1
31  br i1 %cmp4, label %if.then5, label %for.cond
32
33if.then5:                                         ; preds = %if.end
34  call void @foo() nounwind
35  %inc = add i32 %cuts.1, 1
36  br label %for.cond
37
38for.body18:                                       ; preds = %for.body18, %for.cond14.preheader
39  %i13.027 = phi i32 [ %1, %for.body18 ], [ 0, %for.cond14.preheader ]
40  call void @foo() nounwind
41  %1 = add nsw i32 %i13.027, 1
42  %tmp16 = load i32* @maxStat, align 4
43  %cmp17 = icmp slt i32 %1, %tmp16
44  br i1 %cmp17, label %for.body18, label %return
45
46return:                                           ; preds = %for.body18, %for.body, %for.cond14.preheader
47  ret i32 0
48}
49
50declare void @foo() nounwind
51
52; Notify SCEV when removing an ExitingBlock.
53; CHECK: @mergeExit
54; CHECK: while.cond191:
55; CHECK: br i1 %or.cond, label %while.body197
56; CHECK-NOT: land.rhs:
57; CHECK: ret
58define void @mergeExit(i32 %MapAttrCount) nounwind uwtable ssp {
59entry:
60  br i1 undef, label %if.then124, label %if.end126
61
62if.then124:                                       ; preds = %entry
63  unreachable
64
65if.end126:                                        ; preds = %entry
66  br i1 undef, label %while.body.lr.ph, label %if.end591
67
68while.body.lr.ph:                                 ; preds = %if.end126
69  br i1 undef, label %if.end140, label %if.then137
70
71if.then137:                                       ; preds = %while.body.lr.ph
72  unreachable
73
74if.end140:                                        ; preds = %while.body.lr.ph
75  br i1 undef, label %while.cond191.outer, label %if.then148
76
77if.then148:                                       ; preds = %if.end140
78  unreachable
79
80while.cond191.outer:                              ; preds = %if.then205, %if.end140
81  br label %while.cond191
82
83while.cond191:                                    ; preds = %while.body197, %while.cond191.outer
84  %CppIndex.0 = phi i32 [ %inc, %while.body197 ], [ undef, %while.cond191.outer ]
85  br i1 undef, label %land.rhs, label %if.then216
86
87land.rhs:                                         ; preds = %while.cond191
88  %inc = add i32 %CppIndex.0, 1
89  %cmp196 = icmp ult i32 %inc, %MapAttrCount
90  br i1 %cmp196, label %while.body197, label %if.then216
91
92while.body197:                                    ; preds = %land.rhs
93  br i1 undef, label %if.then205, label %while.cond191
94
95if.then205:                                       ; preds = %while.body197
96  br label %while.cond191.outer
97
98if.then216:                                       ; preds = %land.rhs, %while.cond191
99  br i1 undef, label %if.else, label %if.then221
100
101if.then221:                                       ; preds = %if.then216
102  unreachable
103
104if.else:                                          ; preds = %if.then216
105  br i1 undef, label %if.then266, label %if.end340
106
107if.then266:                                       ; preds = %if.else
108  switch i32 undef, label %if.else329 [
109    i32 17, label %if.then285
110    i32 19, label %if.then285
111    i32 18, label %if.then285
112    i32 15, label %if.then285
113  ]
114
115if.then285:                                       ; preds = %if.then266, %if.then266, %if.then266, %if.then266
116  br i1 undef, label %if.then317, label %if.else324
117
118if.then317:                                       ; preds = %if.then285
119  br label %if.end340
120
121if.else324:                                       ; preds = %if.then285
122  unreachable
123
124if.else329:                                       ; preds = %if.then266
125  unreachable
126
127if.end340:                                        ; preds = %if.then317, %if.else
128  unreachable
129
130if.end591:                                        ; preds = %if.end126
131  br i1 undef, label %cond.end, label %cond.false
132
133cond.false:                                       ; preds = %if.end591
134  unreachable
135
136cond.end:                                         ; preds = %if.end591
137  ret void
138}
139