1; RUN: opt < %s -loop-interchange -S | FileCheck %s
2;; Checks the order of the inner phi nodes does not cause havoc.
3;; The inner loop has a reduction into c. The IV is not the first phi.
4
5target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
6target triple = "armv8--linux-gnueabihf"
7
8; Function Attrs: norecurse nounwind
9define void @test(i32 %T, [90 x i32]* noalias nocapture %C, i16* noalias nocapture readonly %A, i16* noalias nocapture readonly %B) local_unnamed_addr #0 {
10entry:
11  %cmp45 = icmp sgt i32 %T, 0
12  br i1 %cmp45, label %for.body3.lr.ph.preheader, label %for.end21
13
14for.body3.lr.ph.preheader:                        ; preds = %entry
15  br label %for.body3.lr.ph
16
17for.body3.lr.ph:                                  ; preds = %for.body3.lr.ph.preheader, %for.inc19
18  %i.046 = phi i32 [ %inc20, %for.inc19 ], [ 0, %for.body3.lr.ph.preheader ]
19  %mul = mul nsw i32 %i.046, %T
20  br label %for.body6.lr.ph
21
22for.body6.lr.ph:                                  ; preds = %for.inc16, %for.body3.lr.ph
23  %j.043 = phi i32 [ 0, %for.body3.lr.ph ], [ %inc17, %for.inc16 ]
24  %arrayidx14 = getelementptr inbounds [90 x i32], [90 x i32]* %C, i32 %i.046, i32 %j.043
25  %arrayidx14.promoted = load i32, i32* %arrayidx14, align 4
26  br label %for.body6
27
28for.body6:                                        ; preds = %for.body6, %for.body6.lr.ph
29  %add1541 = phi i32 [ %arrayidx14.promoted, %for.body6.lr.ph ], [ %add15, %for.body6 ]
30  %k.040 = phi i32 [ 0, %for.body6.lr.ph ], [ %inc, %for.body6 ]
31  %add = add nsw i32 %k.040, %mul
32  %arrayidx = getelementptr inbounds i16, i16* %A, i32 %add
33  %0 = load i16, i16* %arrayidx, align 2
34  %conv = sext i16 %0 to i32
35  %mul7 = mul nsw i32 %k.040, %T
36  %add8 = add nsw i32 %mul7, %j.043
37  %arrayidx9 = getelementptr inbounds i16, i16* %B, i32 %add8
38  %1 = load i16, i16* %arrayidx9, align 2
39  %conv10 = sext i16 %1 to i32
40  %mul11 = mul nsw i32 %conv10, %conv
41  %add15 = add nsw i32 %mul11, %add1541
42  %inc = add nuw nsw i32 %k.040, 1
43  %exitcond = icmp eq i32 %inc, %T
44  br i1 %exitcond, label %for.inc16, label %for.body6
45
46for.inc16:                                        ; preds = %for.body6
47  %add15.lcssa = phi i32 [ %add15, %for.body6 ]
48  store i32 %add15.lcssa, i32* %arrayidx14, align 4
49  %inc17 = add nuw nsw i32 %j.043, 1
50  %exitcond47 = icmp eq i32 %inc17, %T
51  br i1 %exitcond47, label %for.inc19, label %for.body6.lr.ph
52
53for.inc19:                                        ; preds = %for.inc16
54  %inc20 = add nuw nsw i32 %i.046, 1
55  %exitcond48 = icmp eq i32 %inc20, %T
56  br i1 %exitcond48, label %for.end21.loopexit, label %for.body3.lr.ph
57
58for.end21.loopexit:                               ; preds = %for.inc19
59  br label %for.end21
60
61for.end21:                                        ; preds = %for.end21.loopexit, %entry
62  ret void
63}
64
65
66; CHECK-LABEL: test
67; CHECK: entry:
68; CHECK:   br i1 %cmp45, label %for.body6.preheader, label %for.end21
69; CHECK: for.body3.lr.ph.preheader:
70; CHECK:   br label %for.body3.lr.ph
71; CHECK: for.body3.lr.ph:
72; CHECK:   br label %for.body6.lr.ph.preheader
73; CHECK: for.body6.lr.ph.preheader:
74; CHECK:   br label %for.body6.lr.ph
75; CHECK: for.body6.lr.ph:
76; CHECK:   br label %for.body6.split1
77; CHECK: for.body6.preheader:
78; CHECK:   br label %for.body6
79; CHECK: for.body6:
80; CHECK:   br label %for.body3.lr.ph.preheader
81; CHECK: for.body6.split1:
82; CHECK:   br label %for.inc16
83; CHECK: for.body6.split:
84; CHECK:   add nuw nsw i32 %k.040, 1
85; CHECK:   br i1 %exitcond, label %for.end21.loopexit, label %for.body6
86; CHECK: for.inc16:
87; CHECK:   br i1 %exitcond47, label %for.inc19, label %for.body6.lr.ph
88; CHECK: for.inc19:
89; CHECK:   br i1 %exitcond48, label %for.body6.split, label %for.body3.lr.ph
90; CHECK: for.end21:
91