1; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-delicm -analyze < %s | FileCheck %s
2;
3; Register-promoted reduction but without preheader.
4;
5;    void func(double *A) {
6;      for (int j = 0; j < 2; j += 1) { /* outer */
7;        double phi = A[j];
8;        for (int i = 0; i < 4; i += 1) /* reduction */
9;          phi += 4.2;
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  %A_idx = getelementptr inbounds double, double* %A, i32 %j
25  %init = load double, double* %A_idx
26  br i1 %j.cmp, label %reduction.for, label %outer.exit
27
28
29
30    reduction.for:
31      %i = phi i32 [0, %outer.for], [%i.inc, %reduction.inc]
32      %phi = phi double [%init, %outer.for], [%add, %reduction.inc]
33      br label %body
34
35
36
37        body:
38          %add = fadd double %phi, 4.2
39          br label %reduction.inc
40
41
42
43    reduction.inc:
44      %i.inc = add nuw nsw i32 %i, 1
45      %i.cmp = icmp slt i32 %i.inc, 4
46      br i1 %i.cmp, label %reduction.for, label %reduction.exit
47
48    reduction.exit:
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
66; CHECK: Statistics {
67; CHECK:     Compatible overwrites: 1
68; CHECK:     Overwrites mapped to:  1
69; CHECK:     Value scalars mapped:  2
70; CHECK:     PHI scalars mapped:    1
71; CHECK: }
72
73; CHECK:      After accesses {
74; CHECK-NEXT:     Stmt_outer_for
75; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 0]
76; CHECK-NEXT:                 { Stmt_outer_for[i0] -> MemRef_A[i0] };
77; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
78; CHECK-NEXT:                 { Stmt_outer_for[i0] -> MemRef_phi__phi[] };
79; CHECK-NEXT:            new: { Stmt_outer_for[i0] -> MemRef_A[i0] : i0 <= 1 };
80; CHECK-NEXT:     Stmt_reduction_for
81; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
82; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
83; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
84; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
85; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
86; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
87; CHECK-NEXT:     Stmt_body
88; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
89; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_add[] };
90; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
91; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
92; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_phi[] };
93; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
94; CHECK-NEXT:     Stmt_reduction_inc
95; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
96; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
97; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] };
98; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
99; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
100; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : i1 <= 2 };
101; CHECK-NEXT:     Stmt_reduction_exit
102; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
103; CHECK-NEXT:                 { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
104; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
105; CHECK-NEXT:                 { Stmt_reduction_exit[i0] -> MemRef_add[] };
106; CHECK-NEXT:            new: { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
107; CHECK-NEXT: }
108