1; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
2; RUN: opt %loadPolly -polly-ast -analyze < %s | FileCheck %s --check-prefix=AST
3;
4;    void f(int *A, int N) {
5;      for (int i = 0; i < N; i++)
6;        switch (i % 4) {
7;        case 0:
8;          A[i] += 1;
9;          break;
10;        case 1:
11;          A[i] += 2;
12;          break;
13;        case 2:
14;          A[i] += 3;
15;          break;
16;        case 3:
17;          A[i] += 4;
18;          break;
19;        default:
20;          A[i - 1] += A[i + 1];
21;        }
22;    }
23
24; CHECK:      Statements {
25; CHECK-NEXT:     Stmt_sw_bb
26; CHECK-NEXT:         Domain :=
27; CHECK-NEXT:             [N] -> { Stmt_sw_bb[i0] : (i0) mod 4 = 0 and 0 <= i0 < N };
28; CHECK-NEXT:         Schedule :=
29; CHECK-NEXT:             [N] -> { Stmt_sw_bb[i0] -> [i0, 3] };
30; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
31; CHECK-NEXT:             [N] -> { Stmt_sw_bb[i0] -> MemRef_A[i0] };
32; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
33; CHECK-NEXT:             [N] -> { Stmt_sw_bb[i0] -> MemRef_A[i0] };
34; CHECK-NEXT:     Stmt_sw_bb_1
35; CHECK-NEXT:         Domain :=
36; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] : (-1 + i0) mod 4 = 0 and 0 < i0 < N };
37; CHECK-NEXT:         Schedule :=
38; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] -> [i0, 2] };
39; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
40; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] -> MemRef_A[i0] };
41; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
42; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] -> MemRef_A[i0] };
43; CHECK-NEXT:     Stmt_sw_bb_5
44; CHECK-NEXT:         Domain :=
45; CHECK-NEXT:             [N] -> { Stmt_sw_bb_5[i0] : (2 + i0) mod 4 = 0 and 2 <= i0 < N };
46; CHECK-NEXT:         Schedule :=
47; CHECK-NEXT:             [N] -> { Stmt_sw_bb_5[i0] -> [i0, 1] };
48; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
49; CHECK-NEXT:             [N] -> { Stmt_sw_bb_5[i0] -> MemRef_A[i0] };
50; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
51; CHECK-NEXT:             [N] -> { Stmt_sw_bb_5[i0] -> MemRef_A[i0] };
52; CHECK-NEXT:     Stmt_sw_bb_9
53; CHECK-NEXT:         Domain :=
54; CHECK-NEXT:             [N] -> { Stmt_sw_bb_9[i0] : (1 + i0) mod 4 = 0 and 3 <= i0 < N };
55; CHECK-NEXT:         Schedule :=
56; CHECK-NEXT:             [N] -> { Stmt_sw_bb_9[i0] -> [i0, 0] };
57; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
58; CHECK-NEXT:             [N] -> { Stmt_sw_bb_9[i0] -> MemRef_A[i0] };
59; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
60; CHECK-NEXT:             [N] -> { Stmt_sw_bb_9[i0] -> MemRef_A[i0] };
61; CHECK-NEXT: }
62
63; AST:      if (1)
64;
65; AST:        for (int c0 = 0; c0 < N; c0 += 4) {
66; AST-NEXT:      Stmt_sw_bb(c0);
67; AST-NEXT:      if (N >= c0 + 2) {
68; AST-NEXT:        Stmt_sw_bb_1(c0 + 1);
69; AST-NEXT:        if (N >= c0 + 3) {
70; AST-NEXT:          Stmt_sw_bb_5(c0 + 2);
71; AST-NEXT:          if (N >= c0 + 4)
72; AST-NEXT:            Stmt_sw_bb_9(c0 + 3);
73; AST-NEXT:        }
74; AST-NEXT:      }
75; AST-NEXT:    }
76;
77; AST:      else
78; AST-NEXT:     {  /* original code */ }
79
80target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
81
82define void @f(i32* %A, i32 %N) {
83entry:
84  %tmp = sext i32 %N to i64
85  br label %for.cond
86
87for.cond:                                         ; preds = %for.inc, %entry
88  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
89  %cmp = icmp slt i64 %indvars.iv, %tmp
90  br i1 %cmp, label %for.body, label %for.end
91
92for.body:                                         ; preds = %for.cond
93  %tmp3 = trunc i64 %indvars.iv to i32
94  %rem = srem i32 %tmp3, 4
95  switch i32 %rem, label %sw.default [
96    i32 0, label %sw.bb
97    i32 1, label %sw.bb.1
98    i32 2, label %sw.bb.5
99    i32 3, label %sw.bb.9
100  ]
101
102sw.bb:                                            ; preds = %for.body
103  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
104  %tmp4 = load i32, i32* %arrayidx, align 4
105  %add = add nsw i32 %tmp4, 1
106  store i32 %add, i32* %arrayidx, align 4
107  br label %sw.epilog
108
109sw.bb.1:                                          ; preds = %for.body
110  %arrayidx3 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
111  %tmp5 = load i32, i32* %arrayidx3, align 4
112  %add4 = add nsw i32 %tmp5, 2
113  store i32 %add4, i32* %arrayidx3, align 4
114  br label %sw.epilog
115
116sw.bb.5:                                          ; preds = %for.body
117  %arrayidx7 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
118  %tmp6 = load i32, i32* %arrayidx7, align 4
119  %add8 = add nsw i32 %tmp6, 3
120  store i32 %add8, i32* %arrayidx7, align 4
121  br label %sw.epilog
122
123sw.bb.9:                                          ; preds = %for.body
124  %arrayidx11 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
125  %tmp7 = load i32, i32* %arrayidx11, align 4
126  %add12 = add nsw i32 %tmp7, 4
127  store i32 %add12, i32* %arrayidx11, align 4
128  br label %sw.epilog
129
130sw.default:                                       ; preds = %for.body
131  %tmp8 = add nuw nsw i64 %indvars.iv, 1
132  %arrayidx15 = getelementptr inbounds i32, i32* %A, i64 %tmp8
133  %tmp9 = load i32, i32* %arrayidx15, align 4
134  %tmp10 = add nsw i64 %indvars.iv, -1
135  %arrayidx17 = getelementptr inbounds i32, i32* %A, i64 %tmp10
136  %tmp11 = load i32, i32* %arrayidx17, align 4
137  %add18 = add nsw i32 %tmp11, %tmp9
138  store i32 %add18, i32* %arrayidx17, align 4
139  br label %sw.epilog
140
141sw.epilog:                                        ; preds = %sw.default, %sw.bb.9, %sw.bb.5, %sw.bb.1, %sw.bb
142  br label %for.inc
143
144for.inc:                                          ; preds = %sw.epilog
145  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
146  br label %for.cond
147
148for.end:                                          ; preds = %for.cond
149  ret void
150}
151