1 ; RUN: opt %loadPolly -polly-flatten-schedule -polly-delicm-compute-known=true -polly-delicm-overapproximate-writes=true -polly-delicm -analyze < %s | FileCheck %s --check-prefix=APPROX
2 ; RUN: opt %loadPolly -polly-flatten-schedule -polly-delicm-compute-known=true -polly-delicm-overapproximate-writes=false -polly-delicm -analyze < %s | FileCheck %s --check-prefix=EXACT
3 ; RUN: opt %loadPolly -polly-flatten-schedule -polly-delicm-compute-known=true -polly-delicm-partial-writes=true -polly-delicm -analyze < %s | FileCheck %s --check-prefix=PARTIAL
5 ; void func(double *A {
6 ; for (int j = -1; j < 3; j += 1) { /* outer */
9 ; for (int i = 0; i < j; i += 1) /* reduction */
15 define void @func(double* noalias nonnull %A) {
17 br label %outer.preheader
23 %j = phi i32 [-1, %outer.preheader], [%j.inc, %outer.inc]
24 %j.cmp = icmp slt i32 %j, 3
25 br i1 %j.cmp, label %reduction.checkloop, label %outer.exit
30 %j2.cmp = icmp slt i32 0, %j
31 br i1 %j2.cmp, label %reduction.preheader, label %reduction.exit
34 br label %reduction.for
37 %i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
38 %phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
44 %add = fadd double %phi, 4.2
45 br label %reduction.inc
50 %i.inc = add nuw nsw i32 %i, 1
51 %i.cmp = icmp slt i32 %i.inc, %j
52 br i1 %i.cmp, label %reduction.for, label %reduction.exit
55 %val = phi double [%add, %reduction.inc], [0.0, %reduction.checkloop]
56 %A_idx = getelementptr inbounds double, double* %A, i32 %j
57 store double %val, double* %A_idx
63 %j.inc = add nuw nsw i32 %j, 1
74 ; APPROX: After accesses {
75 ; APPROX-NEXT: Stmt_reduction_checkloop
76 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
77 ; APPROX-NEXT: { Stmt_reduction_checkloop[i0] -> MemRef_val__phi[] };
78 ; APPROX-NEXT: new: { Stmt_reduction_checkloop[i0] -> MemRef_A[-1 + i0] };
79 ; APPROX-NEXT: Stmt_reduction_preheader
80 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
81 ; APPROX-NEXT: { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
82 ; APPROX-NEXT: new: { Stmt_reduction_preheader[i0] -> MemRef_A[-1 + i0] };
83 ; APPROX-NEXT: Stmt_reduction_for
84 ; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
85 ; APPROX-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
86 ; APPROX-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
87 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
88 ; APPROX-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
89 ; APPROX-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
90 ; APPROX-NEXT: Stmt_body
91 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
92 ; APPROX-NEXT: { Stmt_body[i0, i1] -> MemRef_add[] };
93 ; APPROX-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
94 ; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
95 ; APPROX-NEXT: { Stmt_body[i0, i1] -> MemRef_phi[] };
96 ; APPROX-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
97 ; APPROX-NEXT: Stmt_reduction_inc
98 ; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
99 ; APPROX-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
100 ; APPROX-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[-1 + i0] };
101 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
102 ; APPROX-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
103 ; APPROX-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[2] };
104 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
105 ; APPROX-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_val__phi[] };
106 ; APPROX-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[-1 + i0] };
107 ; APPROX-NEXT: Stmt_reduction_exit
108 ; APPROX-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
109 ; APPROX-NEXT: { Stmt_reduction_exit[i0] -> MemRef_val__phi[] };
110 ; APPROX-NEXT: new: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
111 ; APPROX-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
112 ; APPROX-NEXT: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
116 ; EXACT: No modification has been made
119 ; PARTIAL: After accesses {
120 ; PARTIAL-NEXT: Stmt_reduction_checkloop
121 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
122 ; PARTIAL-NEXT: { Stmt_reduction_checkloop[i0] -> MemRef_val__phi[] };
123 ; PARTIAL-NEXT: new: { Stmt_reduction_checkloop[i0] -> MemRef_A[-1 + i0] : i0 <= 1 };
124 ; PARTIAL-NEXT: Stmt_reduction_preheader
125 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
126 ; PARTIAL-NEXT: { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
127 ; PARTIAL-NEXT: new: { Stmt_reduction_preheader[i0] -> MemRef_A[-1 + i0] };
128 ; PARTIAL-NEXT: Stmt_reduction_for
129 ; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
130 ; PARTIAL-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
131 ; PARTIAL-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
132 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
133 ; PARTIAL-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
134 ; PARTIAL-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[-1 + i0] };
135 ; PARTIAL-NEXT: Stmt_body
136 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
137 ; PARTIAL-NEXT: { Stmt_body[i0, i1] -> MemRef_add[] };
138 ; PARTIAL-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
139 ; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
140 ; PARTIAL-NEXT: { Stmt_body[i0, i1] -> MemRef_phi[] };
141 ; PARTIAL-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[-1 + i0] };
142 ; PARTIAL-NEXT: Stmt_reduction_inc
143 ; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
144 ; PARTIAL-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_add[] };
145 ; PARTIAL-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[-1 + i0] };
146 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
147 ; PARTIAL-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
148 ; PARTIAL-NEXT: new: { Stmt_reduction_inc[3, 0] -> MemRef_A[2] };
149 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
150 ; PARTIAL-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_val__phi[] };
151 ; PARTIAL-NEXT: new: { Stmt_reduction_inc[i0, -2 + i0] -> MemRef_A[-1 + i0] };
152 ; PARTIAL-NEXT: Stmt_reduction_exit
153 ; PARTIAL-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
154 ; PARTIAL-NEXT: { Stmt_reduction_exit[i0] -> MemRef_val__phi[] };
155 ; PARTIAL-NEXT: new: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };
156 ; PARTIAL-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
157 ; PARTIAL-NEXT: { Stmt_reduction_exit[i0] -> MemRef_A[-1 + i0] };