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1; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-delicm -analyze < %s | FileCheck %s
2;
3;    void func(double *A) {
4;      for (int j = 0; j < 2; j += 1) { /* outer */
5;        double phi = 0.0;
6;        for (int i = 0; i < 4; i += 1) /* reduction */
7;          phi += 4.2;
8;        dummy = A[j];
9;        A[j] = phi;
10;      }
11;    }
12;
13; Check that A[j] is not used for mapping as it is still in use.
14;
15define void @func(double* noalias nonnull %A) {
16entry:
17  %fsomeval = fadd double 21.0, 21.0
18  br label %outer.preheader
19
20outer.preheader:
21  br label %outer.for
22
23outer.for:
24  %j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
25  %j.cmp = icmp slt i32 %j, 2
26  br i1 %j.cmp, label %reduction.preheader, label %outer.exit
27
28
29    reduction.preheader:
30      br label %reduction.for
31
32    reduction.for:
33      %i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
34      %phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
35      %i.cmp = icmp slt i32 %i, 4
36      br i1 %i.cmp, label %body, label %reduction.exit
37
38
39
40        body:
41          %add = fadd double %phi, 4.2
42          br label %reduction.inc
43
44
45
46    reduction.inc:
47      %i.inc = add nuw nsw i32 %i, 1
48      br label %reduction.for
49
50    reduction.exit:
51      %A_idx = getelementptr inbounds double, double* %A, i32 %j
52      %dummy = load double, double* %A_idx
53      store double %phi, double* %A_idx
54      br label %outer.inc
55
56
57
58outer.inc:
59  %j.inc = add nuw nsw i32 %j, 1
60  br label %outer.for
61
62outer.exit:
63  br label %return
64
65return:
66  ret void
67}
68
69
70; CHECK: Statistics {
71; CHECK:     Compatible overwrites: 1
72; CHECK: }
73; CHECK: No modification has been made
74