1; RUN: opt < %s -disable-output "-passes=print<da>" -aa-pipeline=basic-aa 2>&1 \
2; RUN: | FileCheck %s
3; RUN: opt < %s -analyze -basicaa -da  | FileCheck %s
4
5; Test that the dependence analysis generates the correct results when using
6; an aliased object that points to a different element in the same array.
7; PR33567 - https://bugs.llvm.org/show_bug.cgi?id=33567
8
9; void test1(int *A, int *B, int N) {
10;   int *top = A;
11;   int *bot = A + N/2;
12;   for (int i = 0; i < N; i++)
13;     B[i] = top[i] + bot[i];
14; }
15
16; CHECK-LABEL: test1
17; CHECK: da analyze - input [*|<]!
18
19define void @test1(i32* nocapture %A, i32* nocapture %B, i32 %N) #0 {
20entry:
21  %cmp9 = icmp sgt i32 %N, 0
22  br i1 %cmp9, label %for.body.lr.ph, label %for.end
23
24for.body.lr.ph:
25  %div = sdiv i32 %N, 2
26  %bot.gep = getelementptr i32, i32* %A, i32 %div
27  br label %for.body
28
29for.body:
30  %i = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
31  %gep.0 = getelementptr i32, i32* %A, i32 %i
32  %gep.1 = getelementptr i32, i32* %bot.gep, i32 %i
33  %gep.B = getelementptr i32, i32* %B, i32 %i
34  %0 = load i32, i32* %gep.0, align 4
35  %1 = load i32, i32* %gep.1, align 4
36  %add = add nsw i32 %1, %0
37  store i32 %add, i32* %gep.B, align 4
38  %inc = add nsw i32 %i, 1
39  %exitcond = icmp eq i32 %inc, %N
40  br i1 %exitcond, label %for.end, label %for.body
41
42for.end:
43  ret void
44}
45
46
47; void test2(int *A, unsigned n) {
48;   int *B = A + 1;
49;   for (unsigned i = 0; i < n; ++i) {
50;     A[i] = B[i];
51;   }
52; }
53
54; CHECK-LABEL: test2
55; CHECK: da analyze - consistent anti [1]!
56
57define void @test2(i32*, i32) #3 {
58  %3 = getelementptr inbounds i32, i32* %0, i64 1
59  br label %4
60
61; <label>:4:
62  %.0 = phi i32 [ 0, %2 ], [ %14, %13 ]
63  %5 = sub i32 %1, 1
64  %6 = icmp ult i32 %.0, %5
65  br i1 %6, label %7, label %15
66
67; <label>:7:
68  %8 = zext i32 %.0 to i64
69  %9 = getelementptr inbounds i32, i32* %3, i64 %8
70  %10 = load i32, i32* %9, align 4
71  %11 = zext i32 %.0 to i64
72  %12 = getelementptr inbounds i32, i32* %0, i64 %11
73  store i32 %10, i32* %12, align 4
74  br label %13
75
76; <label>:13:
77  %14 = add i32 %.0, 1
78  br label %4
79
80; <label>:15:
81  ret void
82}
83