1; RUN: opt -loop-accesses -analyze < %s | FileCheck %s
2
3; Handle memchecks involving loop-invariant addresses:
4;
5; extern int *A, *b;
6; for (i = 0; i < N; ++i) {
7;  A[i] = b;
8; }
9
10target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
11
12; CHECK: Memory dependences are safe with run-time checks
13; CHECK: Run-time memory checks:
14; CHECK-NEXT: Check 0:
15; CHECK-NEXT:   Comparing group ({{.*}}):
16; CHECK-NEXT:     %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
17; CHECK-NEXT:   Against group ({{.*}}):
18; CHECK-NEXT:   i32* %b
19
20define void @f(i32* %a, i32* %b) {
21entry:
22  br label %for.body
23
24for.body:                                         ; preds = %for.body, %entry
25  %ind = phi i64 [ 0, %entry ], [ %inc, %for.body ]
26
27  %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
28
29  %loadB = load i32, i32* %b, align 4
30  store i32 %loadB, i32* %arrayidxA, align 4
31
32  %inc = add nuw nsw i64 %ind, 1
33  %exitcond = icmp eq i64 %inc, 20
34  br i1 %exitcond, label %for.end, label %for.body
35
36for.end:                                          ; preds = %for.body
37  ret void
38}
39