1; RUN: opt %loadPolly -polly-flatten-schedule -polly-delicm-compute-known=true -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;          A[j] = phi;
9;        }
10;        A[j] = phi;
11;      }
12;    }
13;
14define void @func(double* noalias nonnull %A) {
15entry:
16  br label %outer.preheader
17
18outer.preheader:
19  br label %outer.for
20
21outer.for:
22  %j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
23  %j.cmp = icmp slt i32 %j, 2
24  br i1 %j.cmp, label %reduction.preheader, label %outer.exit
25
26
27    reduction.preheader:
28      br label %reduction.for
29
30    reduction.for:
31      %i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
32      %phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
33      %i.cmp = icmp slt i32 %i, 4
34      %A_idx = getelementptr inbounds double, double* %A, i32 %j
35      br i1 %i.cmp, label %body, label %reduction.exit
36
37
38
39        body:
40          %add = fadd double %phi, 4.2
41          store double %add, double* %A_idx
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      store double %phi, double* %A_idx
52      br label %outer.inc
53
54
55
56outer.inc:
57  %j.inc = add nuw nsw i32 %j, 1
58  br label %outer.for
59
60outer.exit:
61  br label %return
62
63return:
64  ret void
65}
66
67
68; CHECK:      After accesses {
69; CHECK-NEXT:     Stmt_reduction_preheader
70; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
71; CHECK-NEXT:                 { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
72; CHECK-NEXT:            new: { Stmt_reduction_preheader[i0] -> MemRef_A[i0] };
73; CHECK-NEXT:     Stmt_reduction_for
74; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
75; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
76; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
77; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
78; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
79; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
80; CHECK-NEXT:     Stmt_body
81; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
82; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_add[] };
83; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
84; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
85; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_phi[] };
86; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
87; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
88; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_A[i0] };
89; CHECK-NEXT:     Stmt_reduction_inc
90; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
91; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
92; CHECK-NEXT:            new: {  Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : i1 <= 7 - 5i0; Stmt_reduction_inc[1, 3] -> MemRef_A[1] };
93; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
94; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
95; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] };
96; CHECK-NEXT:     Stmt_reduction_exit
97; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
98; CHECK-NEXT:                 { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
99; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
100; CHECK-NEXT:                 { Stmt_reduction_exit[i0] -> MemRef_phi[] };
101; CHECK-NEXT:            new: { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
102; CHECK-NEXT: }
103