1; RUN: opt %loadPolly \
2; RUN: -S -polly-codegen < %s | FileCheck %s
3;
4;    void f(int *A, int N) {
5;      for (int i = 0; i < N; i++)
6;        if (A[i])
7;          switch (i % 4) {
8;          case 0:
9;            A[i] += 1;
10;            break;
11;          case 1:
12;            A[i] += 2;
13;            break;
14;          }
15;    }
16;
17; CHECK: polly.stmt.if.then:
18; CHECK:   %1 = trunc i64 %polly.indvar to i32
19; CHECK:   %p_rem = srem i32 %1, 4
20; CHECK:   switch i32 %p_rem, label %polly.stmt.sw.epilog [
21; CHECK:     i32 0, label %polly.stmt.sw.bb
22; CHECK:     i32 1, label %polly.stmt.sw.bb.3
23; CHECK:   ]
24;
25target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
26
27define void @f(i32* %A, i32 %N) {
28entry:
29  %tmp = sext i32 %N to i64
30  br label %for.cond
31
32for.cond:                                         ; preds = %for.inc, %entry
33  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
34  %cmp = icmp slt i64 %indvars.iv, %tmp
35  br i1 %cmp, label %for.body, label %for.end
36
37for.body:                                         ; preds = %for.cond
38  %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
39  %tmp1 = load i32, i32* %arrayidx, align 4
40  %tobool = icmp eq i32 %tmp1, 0
41  br i1 %tobool, label %if.end, label %if.then
42
43if.then:                                          ; preds = %for.body
44  %tmp2 = trunc i64 %indvars.iv to i32
45  %rem = srem i32 %tmp2, 4
46  switch i32 %rem, label %sw.epilog [
47    i32 0, label %sw.bb
48    i32 1, label %sw.bb.3
49  ]
50
51sw.bb:                                            ; preds = %if.then
52  %arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
53  %tmp3 = load i32, i32* %arrayidx2, align 4
54  %add = add nsw i32 %tmp3, 1
55  store i32 %add, i32* %arrayidx2, align 4
56  br label %sw.epilog
57
58sw.bb.3:                                          ; preds = %if.then
59  %arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
60  %tmp4 = load i32, i32* %arrayidx5, align 4
61  %add6 = add nsw i32 %tmp4, 2
62  store i32 %add6, i32* %arrayidx5, align 4
63  br label %sw.epilog
64
65sw.epilog:                                        ; preds = %sw.bb.3, %sw.bb, %if.then
66  br label %if.end
67
68if.end:                                           ; preds = %for.body, %sw.epilog
69  br label %for.inc
70
71for.inc:                                          ; preds = %if.end
72  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
73  br label %for.cond
74
75for.end:                                          ; preds = %for.cond
76  ret void
77}
78