1; RUN: opt -basic-aa -loop-versioning -S < %s | FileCheck %s
2
3target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
4
5; Do not version this loop because of a convergent operation
6
7; CHECK-LABEL: @f(
8; CHECK: call i32 @llvm.convergent(
9; CHECK-NOT: call i32 @llvm.convergent(
10define void @f(i32* %a, i32* %b, i32* %c) #0 {
11entry:
12  br label %for.body
13
14for.body:                                         ; preds = %for.body, %entry
15  %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
16
17  %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
18  %loadA = load i32, i32* %arrayidxA, align 4
19
20  %arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
21  %loadB = load i32, i32* %arrayidxB, align 4
22  %convergentB = call i32 @llvm.convergent(i32 %loadB)
23
24  %mulC = mul i32 %loadA, %convergentB
25
26  %arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
27  store i32 %mulC, i32* %arrayidxC, align 4
28
29  %add = add nuw nsw i64 %ind, 1
30  %exitcond = icmp eq i64 %add, 20
31  br i1 %exitcond, label %for.end, label %for.body
32
33for.end:                                          ; preds = %for.body
34  ret void
35}
36
37declare i32 @llvm.convergent(i32) #1
38
39attributes #0 = { nounwind convergent }
40attributes #1 = { nounwind readnone convergent }
41