1; RUN: opt -basic-aa -loop-versioning -S < %s | FileCheck %s
2; RUN: opt -aa-pipeline=basic-aa -passes=loop-versioning -S < %s | FileCheck %s
3
4target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
5
6; Version this loop with overlap checks between a, c and b, c.
7
8define void @f(i32* %a, i32* %b, i32* %c) {
9entry:
10  br label %for.body
11
12; CHECK: for.body.lver.check:
13; CHECK:   icmp
14; CHECK:   icmp
15; CHECK:   icmp
16; CHECK:   icmp
17; CHECK-NOT: icmp
18; CHECK:   br i1 %conflict.rdx, label %for.body.ph.lver.orig, label %for.body.ph
19
20; CHECK: for.body.ph.lver.orig:
21; CHECK: for.body.lver.orig:
22; CHECK:   br i1 %exitcond.lver.orig, label %for.end.loopexit, label %for.body.lver.orig
23; CHECK: for.body.ph:
24; CHECK: for.body:
25; CHECK:   br i1 %exitcond, label %for.end.loopexit12, label %for.body
26; CHECK: for.end.loopexit:
27; CHECK:   br label %for.end
28; CHECK: for.end.loopexit12:
29; CHECK:   br label %for.end
30; CHECK: for.end:
31
32for.body:                                         ; preds = %for.body, %entry
33  %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
34
35  %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
36  %loadA = load i32, i32* %arrayidxA, align 4
37
38  %arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
39  %loadB = load i32, i32* %arrayidxB, align 4
40
41  %mulC = mul i32 %loadA, %loadB
42
43  %arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
44  store i32 %mulC, i32* %arrayidxC, align 4
45
46  %add = add nuw nsw i64 %ind, 1
47  %exitcond = icmp eq i64 %add, 20
48  br i1 %exitcond, label %for.end, label %for.body
49
50for.end:                                          ; preds = %for.body
51  ret void
52}
53