1; RUN: opt -S -indvars -loop-idiom < %s
2; PR14214
3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
4target triple = "x86_64-unknown-linux-gnu"
5
6define i32 @quote_arg() nounwind {
7entry:
8  br label %for.cond
9
10for.cond:                                         ; preds = %for.inc, %entry
11  %backslashes.0 = phi i32 [ undef, %entry ], [ %backslashes.2, %for.inc ]
12  %p.0 = phi i8* [ undef, %entry ], [ %incdec.ptr3, %for.inc ]
13  %q.0 = phi i8* [ undef, %entry ], [ %q.2, %for.inc ]
14  %0 = load i8, i8* %p.0, align 1
15  switch i8 %0, label %while.cond.preheader [
16    i8 0, label %for.cond4.preheader
17    i8 92, label %for.inc
18  ]
19
20while.cond.preheader:                             ; preds = %for.cond
21  %tobool210 = icmp eq i32 %backslashes.0, 0
22  br i1 %tobool210, label %for.inc.loopexit, label %while.body.lr.ph
23
24while.body.lr.ph:                                 ; preds = %while.cond.preheader
25  %1 = add i32 %backslashes.0, -1
26  %2 = zext i32 %1 to i64
27  br label %while.body
28
29for.cond4.preheader:                              ; preds = %for.cond
30  %tobool57 = icmp eq i32 %backslashes.0, 0
31  br i1 %tobool57, label %for.end10, label %for.body6.lr.ph
32
33for.body6.lr.ph:                                  ; preds = %for.cond4.preheader
34  br label %for.body6
35
36while.body:                                       ; preds = %while.body.lr.ph, %while.body
37  %q.112 = phi i8* [ %q.0, %while.body.lr.ph ], [ %incdec.ptr, %while.body ]
38  %backslashes.111 = phi i32 [ %backslashes.0, %while.body.lr.ph ], [ %dec, %while.body ]
39  %incdec.ptr = getelementptr inbounds i8, i8* %q.112, i64 1
40  store i8 92, i8* %incdec.ptr, align 1
41  %dec = add nsw i32 %backslashes.111, -1
42  %tobool2 = icmp eq i32 %dec, 0
43  br i1 %tobool2, label %while.cond.for.inc.loopexit_crit_edge, label %while.body
44
45while.cond.for.inc.loopexit_crit_edge:            ; preds = %while.body
46  %scevgep.sum = add i64 %2, 1
47  %scevgep13 = getelementptr i8, i8* %q.0, i64 %scevgep.sum
48  br label %for.inc.loopexit
49
50for.inc.loopexit:                                 ; preds = %while.cond.for.inc.loopexit_crit_edge, %while.cond.preheader
51  %q.1.lcssa = phi i8* [ %scevgep13, %while.cond.for.inc.loopexit_crit_edge ], [ %q.0, %while.cond.preheader ]
52  br label %for.inc
53
54for.inc:                                          ; preds = %for.inc.loopexit, %for.cond
55  %backslashes.2 = phi i32 [ %backslashes.0, %for.cond ], [ 0, %for.inc.loopexit ]
56  %q.2 = phi i8* [ %q.0, %for.cond ], [ %q.1.lcssa, %for.inc.loopexit ]
57  %incdec.ptr3 = getelementptr inbounds i8, i8* %p.0, i64 1
58  br label %for.cond
59
60for.body6:                                        ; preds = %for.body6.lr.ph, %for.body6
61  %q.39 = phi i8* [ %q.0, %for.body6.lr.ph ], [ %incdec.ptr7, %for.body6 ]
62  %backslashes.38 = phi i32 [ %backslashes.0, %for.body6.lr.ph ], [ %dec9, %for.body6 ]
63  %incdec.ptr7 = getelementptr inbounds i8, i8* %q.39, i64 1
64  store i8 92, i8* %incdec.ptr7, align 1
65  %dec9 = add nsw i32 %backslashes.38, -1
66  %tobool5 = icmp eq i32 %dec9, 0
67  br i1 %tobool5, label %for.cond4.for.end10_crit_edge, label %for.body6
68
69for.cond4.for.end10_crit_edge:                    ; preds = %for.body6
70  br label %for.end10
71
72for.end10:                                        ; preds = %for.cond4.for.end10_crit_edge, %for.cond4.preheader
73  ret i32 undef
74}
75