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1; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-delicm -analyze < %s | FileCheck %s -match-full-lines
2;
3; Load (but not store) of A[j] hoisted, reduction only over some iterations.
4;
5;    void func(double *A) {
6;      for (int j = 0; j < 2; j += 1) { /* outer */
7;        double phi = 0.0;
8;        for (int i = 0; i < 4; i += 1) { /* reduction */
9;          if (i != 2)
10;            phi += 4.2;
11;          A[j] = phi;
12;        }
13;      }
14;    }
15;
16define void @func(double* noalias nonnull %A) {
17entry:
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], [%join, %reduction.inc]
35      br label %body
36
37
38
39        body:
40          %cond = icmp ne i32 %i, 2
41          br i1 %cond, label %body_true, label %body_join
42
43        body_true:
44          %add = fadd double %phi, 4.2
45          br label %body_join
46
47        body_join:
48          %join = phi double [%phi, %body], [%add, %body_true]
49          %A_idx = getelementptr inbounds double, double* %A, i32 %j
50          store double %join, double* %A_idx
51          br label %reduction.inc
52
53
54
55    reduction.inc:
56      %i.inc = add nuw nsw i32 %i, 1
57      %i.cmp = icmp slt i32 %i.inc, 4
58      br i1 %i.cmp, label %reduction.for, label %reduction.exit
59
60    reduction.exit:
61      br label %outer.inc
62
63
64
65outer.inc:
66  %j.inc = add nuw nsw i32 %j, 1
67  br label %outer.for
68
69outer.exit:
70  br label %return
71
72return:
73  ret void
74}
75
76
77; CHECK: Statistics {
78; CHECK:     Compatible overwrites: 1
79; CHECK:     Overwrites mapped to:  1
80; CHECK:     Value scalars mapped:  2
81; CHECK:     PHI scalars mapped:    2
82; CHECK: }
83
84; CHECK:      After accesses {
85; CHECK-NEXT:     Stmt_reduction_preheader
86; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
87; CHECK-NEXT:                 { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
88; CHECK-NEXT:            new: { Stmt_reduction_preheader[i0] -> MemRef_A[i0] };
89; CHECK-NEXT:     Stmt_reduction_for
90; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
91; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
92; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
93; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
94; CHECK-NEXT:                 { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
95; CHECK-NEXT:            new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
96; CHECK-NEXT:     Stmt_body
97; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
98; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_phi[] };
99; CHECK-NEXT:            new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
100; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
101; CHECK-NEXT:                 { Stmt_body[i0, i1] -> MemRef_join__phi[] };
102; CHECK-NEXT:            new: { Stmt_body[i0, 2] -> MemRef_A[i0] };
103; CHECK-NEXT:     Stmt_body_true
104; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
105; CHECK-NEXT:                 { Stmt_body_true[i0, i1] -> MemRef_phi[] };
106; CHECK-NEXT:            new: { Stmt_body_true[i0, i1] -> MemRef_A[i0] : i1 <= 1; Stmt_body_true[i0, 3] -> MemRef_A[i0] };
107; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
108; CHECK-NEXT:                 { Stmt_body_true[i0, i1] -> MemRef_join__phi[] };
109; CHECK-NEXT:            new: { Stmt_body_true[i0, i1] -> MemRef_A[i0] : i1 <= 1; Stmt_body_true[i0, 3] -> MemRef_A[i0] };
110; CHECK-NEXT:     Stmt_body_join
111; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
112; CHECK-NEXT:                 { Stmt_body_join[i0, i1] -> MemRef_join[] };
113; CHECK-NEXT:            new: { Stmt_body_join[i0, i1] -> MemRef_A[i0] };
114; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
115; CHECK-NEXT:                 { Stmt_body_join[i0, i1] -> MemRef_join__phi[] };
116; CHECK-NEXT:            new: { Stmt_body_join[i0, i1] -> MemRef_A[i0] };
117; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
118; CHECK-NEXT:                 { Stmt_body_join[i0, i1] -> MemRef_A[i0] };
119; CHECK-NEXT:     Stmt_reduction_inc
120; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
121; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_join[] };
122; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] };
123; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
124; CHECK-NEXT:                 { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
125; CHECK-NEXT:            new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : i1 <= 2 };
126; CHECK-NEXT: }
127