1; RUN: opt %loadPolly -basic-aa -polly-stmt-granularity=bb -polly-dependences -analyze < %s | FileCheck %s
2;
3; This loopnest contains a reduction which imposes the same dependences as the
4; accesses to the array A. We need to ensure we keep the dependences of A.
5;
6; CHECK:      RAW dependences:
7; CHECK-NEXT:     { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
8; CHECK-NEXT: WAR dependences:
9; CHECK-NEXT:     { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
10; CHECK-NEXT: WAW dependences:
11; CHECK-NEXT:     { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
12; CHECK-NEXT: Reduction dependences:
13; CHECK-NEXT:     { Stmt_for_body[i0] -> Stmt_for_body[1 + i0] : 0 <= i0 <= 1022 }
14;
15;
16;    void AandSum(int *restrict sum, int *restrict A) {
17;      for (int i = 0; i < 1024; i++) {
18;        A[i] = A[i] + A[i - 1];
19;        A[i - 1] = A[i] + A[i - 2];
20;        *sum += i;
21;      }
22;    }
23;
24target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
25
26define void @AandSum(i32* noalias %sum, i32* noalias %A) {
27entry:
28  br label %for.cond
29
30for.cond:                                         ; preds = %for.inc, %entry
31  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
32  %exitcond = icmp ne i32 %i.0, 1024
33  br i1 %exitcond, label %for.body, label %for.end
34
35for.body:                                         ; preds = %for.cond
36  %arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.0
37  %tmp = load i32, i32* %arrayidx, align 4
38  %sub = add nsw i32 %i.0, -1
39  %arrayidx1 = getelementptr inbounds i32, i32* %A, i32 %sub
40  %tmp1 = load i32, i32* %arrayidx1, align 4
41  %add = add nsw i32 %tmp, %tmp1
42  %arrayidx2 = getelementptr inbounds i32, i32* %A, i32 %i.0
43  store i32 %add, i32* %arrayidx2, align 4
44  %sub4 = add nsw i32 %i.0, -2
45  %arrayidx5 = getelementptr inbounds i32, i32* %A, i32 %sub4
46  %tmp2 = load i32, i32* %arrayidx5, align 4
47  %add6 = add nsw i32 %add, %tmp2
48  %sub7 = add nsw i32 %i.0, -1
49  %arrayidx8 = getelementptr inbounds i32, i32* %A, i32 %sub7
50  store i32 %add6, i32* %arrayidx8, align 4
51  %tmp3 = load i32, i32* %sum, align 4
52  %add9 = add nsw i32 %tmp3, %i.0
53  store i32 %add9, i32* %sum, align 4
54  br label %for.inc
55
56for.inc:                                          ; preds = %for.body
57  %inc = add nsw i32 %i.0, 1
58  br label %for.cond
59
60for.end:                                          ; preds = %for.cond
61  ret void
62}
63