1; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-flatten-schedule -polly-delicm-overapproximate-writes=true -polly-delicm-compute-known=true -polly-delicm -analyze < %s | FileCheck %s
2;
3;    void func(int *A, double* StartPtr) {
4;      for (int j = 0; j < 2; j += 1) { /* outer */
5;        int phi = *StartPtr;
6;        for (int i = 0; i < 4; i += 1) /* reduction */
7;          phi += 4.2;
8;        A[j] = phi;
9;      }
10;    }
11;
12define void @func(double* noalias nonnull %A, double* noalias nonnull %StartPtr) {
13entry:
14  br label %outer.preheader
15
16outer.preheader:
17  br label %outer.for
18
19outer.for:
20  %j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
21  %j.cmp = icmp slt i32 %j, 2
22  br i1 %j.cmp, label %reduction.preheader, label %outer.exit
23
24
25    reduction.preheader:
26      %Start = load double, double* %StartPtr
27      br label %reduction.for
28
29    reduction.for:
30      %i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
31      %phi = phi double [%Start, %reduction.preheader], [%add, %reduction.inc]
32      br label %body
33
34
35
36        body:
37          %add = fadd double %phi, 4.2
38          br label %reduction.inc
39
40
41
42    reduction.inc:
43      %i.inc = add nuw nsw i32 %i, 1
44      %i.cmp = icmp slt i32 %i.inc, 4
45      br i1 %i.cmp, label %reduction.for, label %reduction.exit
46
47    reduction.exit:
48      %A_idx = getelementptr inbounds double, double* %A, i32 %j
49      store double %add, double* %A_idx
50      br label %outer.inc
51
52
53
54outer.inc:
55  %j.inc = add nuw nsw i32 %j, 1
56  br label %outer.for
57
58outer.exit:
59  br label %return
60
61return:
62  ret void
63}
64
65; CHECK:      After accesses {
66; CHECK-NEXT:     Stmt_reduction_preheader
67; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 0]
68; CHECK-NEXT:                 { Stmt_reduction_preheader[i0] -> MemRef_StartPtr[0] };
69; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
70; CHECK-NEXT:                 { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
71; CHECK-NEXT:            new: { Stmt_reduction_preheader[i0] -> MemRef_A[i0] };
72; CHECK-NEXT:     Stmt_reduction_for
73; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
74; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
75; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
76; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
77; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
78; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
79; CHECK-NEXT:     Stmt_body
80; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
81; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_add[] };
82; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
83; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
84; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_phi[] };
85; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] : 3i1 <= 22 - 14i0; Stmt_body[1, 3] -> MemRef_A[1] };
86; CHECK-NEXT:     Stmt_reduction_inc
87; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
88; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
89; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : 3i1 <= 22 - 14i0; Stmt_reduction_inc[1, 3] -> MemRef_A[1] };
90; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
91; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
92; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] };
93; CHECK-NEXT:     Stmt_reduction_exit
94; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
95; CHECK-NEXT:                 { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
96; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
97; CHECK-NEXT:                 { Stmt_reduction_exit[i0] -> MemRef_add[] };
98; CHECK-NEXT:            new: { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
99; CHECK-NEXT: }
100