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