1; RUN: opt -passes='print-access-info' -disable-output  < %s 2>&1 | FileCheck %s
2
3; This is the test case from PR26314.
4; When we were retrying dependence checking with memchecks only,
5; the loop-invariant access in the inner loop was incorrectly determined to be wrapping
6; because it was not strided in the inner loop.
7
8; #define Z 32
9; typedef struct s {
10;	int v1[Z];
11;	int v2[Z];
12;	int v3[Z][Z];
13; } s;
14;
15; void slow_function (s* const obj, int z) {
16;    for (int j=0; j<Z; j++) {
17;        for (int k=0; k<z; k++) {
18;            int x = obj->v1[k] + obj->v2[j];
19;            obj->v3[j][k] += x;
20;        }
21;    }
22; }
23
24; CHECK: function 'Test':
25; CHECK:   .inner:
26; CHECK-NEXT:     Memory dependences are safe
27; CHECK-NEXT:     Dependences:
28; CHECK-NEXT:     Run-time memory checks:
29; CHECK:          Check 0:
30; CHECK:          Check 1:
31
32target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
33target triple = "x86_64-unknown-linux-gnu"
34
35%struct.s = type { [32 x i32], [32 x i32], [32 x [32 x i32]] }
36
37define void @Test(%struct.s* nocapture %obj, i64 %z) #0 {
38  br label %.outer.preheader
39
40
41.outer.preheader:
42  %i = phi i64 [ 0, %0 ], [ %i.next, %.outer ]
43  %1 = getelementptr inbounds %struct.s, %struct.s* %obj, i64 0, i32 1, i64 %i
44  br label %.inner
45
46.exit:
47  ret void
48
49.outer:
50  %i.next = add nuw nsw i64 %i, 1
51  %exitcond.outer = icmp eq i64 %i.next, 32
52  br i1 %exitcond.outer, label %.exit, label %.outer.preheader
53
54.inner:
55  %j = phi i64 [ 0, %.outer.preheader ], [ %j.next, %.inner ]
56  %2 = getelementptr inbounds %struct.s, %struct.s* %obj, i64 0, i32 0, i64 %j
57  %3 = load i32, i32* %2
58  %4 = load i32, i32* %1
59  %5 = add nsw i32 %4, %3
60  %6 = getelementptr inbounds %struct.s, %struct.s* %obj, i64 0, i32 2, i64 %i, i64 %j
61  %7 = load i32, i32* %6
62  %8 = add nsw i32 %5, %7
63  store i32 %8, i32* %6
64  %j.next = add nuw nsw i64 %j, 1
65  %exitcond.inner = icmp eq i64 %j.next, %z
66  br i1 %exitcond.inner, label %.outer, label %.inner
67}
68