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;          break;
9;        case 1:
10;          A[i] += 1;
11;          break;
12;        case 2:
13;          A[i] += 2;
14;          break;
15;        case 3:
16;          A[i] += 3;
17;          break;
18;        }
19;    }
20
21; CHECK:      Statements {
22; CHECK-NEXT:     Stmt_sw_bb_1
23; CHECK-NEXT:         Domain :=
24; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] : (-1 + i0) mod 4 = 0 and 0 < i0 < N };
25; CHECK-NEXT:         Schedule :=
26; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] -> [i0, 2] };
27; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
28; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] -> MemRef_A[i0] };
29; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
30; CHECK-NEXT:             [N] -> { Stmt_sw_bb_1[i0] -> MemRef_A[i0] };
31; CHECK-NEXT:     Stmt_sw_bb_2
32; CHECK-NEXT:         Domain :=
33; CHECK-NEXT:             [N] -> { Stmt_sw_bb_2[i0] : (2 + i0) mod 4 = 0 and 2 <= i0 < N };
34; CHECK-NEXT:         Schedule :=
35; CHECK-NEXT:             [N] -> { Stmt_sw_bb_2[i0] -> [i0, 1] };
36; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
37; CHECK-NEXT:             [N] -> { Stmt_sw_bb_2[i0] -> MemRef_A[i0] };
38; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
39; CHECK-NEXT:             [N] -> { Stmt_sw_bb_2[i0] -> MemRef_A[i0] };
40; CHECK-NEXT:     Stmt_sw_bb_6
41; CHECK-NEXT:         Domain :=
42; CHECK-NEXT:             [N] -> { Stmt_sw_bb_6[i0] :  (1 + i0) mod 4 = 0 and 3 <= i0 < N };
43; CHECK-NEXT:         Schedule :=
44; CHECK-NEXT:             [N] -> { Stmt_sw_bb_6[i0] -> [i0, 0] };
45; CHECK-NEXT:         ReadAccess :=    [Reduction Type: +] [Scalar: 0]
46; CHECK-NEXT:             [N] -> { Stmt_sw_bb_6[i0] -> MemRef_A[i0] };
47; CHECK-NEXT:         MustWriteAccess :=    [Reduction Type: +] [Scalar: 0]
48; CHECK-NEXT:             [N] -> { Stmt_sw_bb_6[i0] -> MemRef_A[i0] };
49; CHECK-NEXT: }
50
51; AST:      if (1)
52;
53; AST:         for (int c0 = 1; c0 < N; c0 += 4) {
54; AST-NEXT:      Stmt_sw_bb_1(c0);
55; AST-NEXT:      if (N >= c0 + 2) {
56; AST-NEXT:        Stmt_sw_bb_2(c0 + 1);
57; AST-NEXT:        if (N >= c0 + 3)
58; AST-NEXT:          Stmt_sw_bb_6(c0 + 2);
59; AST-NEXT:      }
60; AST-NEXT:    }
61;
62; AST:      else
63; AST-NEXT:     {  /* original code */ }
64
65target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
66
67define void @f(i32* %A, i32 %N) {
68entry:
69  %tmp = sext i32 %N to i64
70  br label %for.cond
71
72for.cond:                                         ; preds = %for.inc, %entry
73  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
74  %cmp = icmp slt i64 %indvars.iv, %tmp
75  br i1 %cmp, label %for.body, label %for.end
76
77for.body:                                         ; preds = %for.cond
78  %tmp1 = trunc i64 %indvars.iv to i32
79  %rem = srem i32 %tmp1, 4
80  switch i32 %rem, label %sw.epilog [
81    i32 0, label %sw.bb
82    i32 1, label %sw.bb.1
83    i32 2, label %sw.bb.2
84    i32 3, label %sw.bb.6
85  ]
86
87sw.bb:                                            ; preds = %for.body
88  br label %sw.epilog
89
90sw.bb.1:                                          ; preds = %for.body
91  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
92  %tmp2 = load i32, i32* %arrayidx, align 4
93  %add = add nsw i32 %tmp2, 1
94  store i32 %add, i32* %arrayidx, align 4
95  br label %sw.epilog
96
97sw.bb.2:                                          ; preds = %for.body
98  %arrayidx4 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
99  %tmp3 = load i32, i32* %arrayidx4, align 4
100  %add5 = add nsw i32 %tmp3, 2
101  store i32 %add5, i32* %arrayidx4, align 4
102  br label %sw.epilog
103
104sw.bb.6:                                          ; preds = %for.body
105  %arrayidx8 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
106  %tmp4 = load i32, i32* %arrayidx8, align 4
107  %add9 = add nsw i32 %tmp4, 3
108  store i32 %add9, i32* %arrayidx8, align 4
109  br label %sw.epilog
110
111sw.epilog:                                        ; preds = %sw.bb.6, %sw.bb.2, %sw.bb.1, %sw.bb, %for.body
112  br label %for.inc
113
114for.inc:                                          ; preds = %sw.epilog
115  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
116  br label %for.cond
117
118for.end:                                          ; preds = %for.cond
119  ret void
120}
121