1; RUN: opt < %s -analyze -delinearize | FileCheck %s
2
3target datalayout = "e-m:e-p:32:32-i1:32-i64:64-a:0-n32"
4
5; Check that division by 1 can be delinearized.
6;
7; void test1(unsigned char *dst, int stride, int bs) {
8;   for (int r = bs; r >= 0; --r)
9;     for (int c = 0; c < bs; ++c)
10;       dst[r * stride + c] = dst[(r + 1) * stride + c - 1];
11; }
12
13; AddRec: {{(-1 + ((1 + %bs) * %stride)),+,(-1 * %stride)}<%for.cond1.preheader>,+,1}<nw><%for.body3>
14; CHECK: Inst:  %0 = load i8, i8* %arrayidx, align 1
15; CHECK: Base offset: %dst
16; CHECK: ArrayDecl[UnknownSize][%stride] with elements of 1 bytes.
17; CHECK: ArrayRef[{(1 + %bs),+,-1}<nw><%for.cond1.preheader>][{-1,+,1}<nw><%for.body3>]
18
19; AddRec: {{(%stride * %bs),+,(-1 * %stride)}<%for.cond1.preheader>,+,1}<nw><%for.body3>
20; CHECK: Inst:  store i8 %0, i8* %arrayidx7, align 1
21; CHECK: Base offset: %dst
22; CHECK: ArrayDecl[UnknownSize][%stride] with elements of 1 bytes.
23; CHECK: ArrayRef[{%bs,+,-1}<nsw><%for.cond1.preheader>][{0,+,1}<nuw><nsw><%for.body3>]
24
25define void @test(i8* nocapture %dst, i32 %stride, i32 %bs) {
26entry:
27  %cmp20 = icmp sgt i32 %bs, -1
28  br i1 %cmp20, label %for.cond1.preheader.lr.ph, label %for.end9
29
30for.cond1.preheader.lr.ph:
31  %cmp218 = icmp slt i32 0, %bs
32  br label %for.cond1.preheader
33
34for.cond1.preheader:
35  %r.021 = phi i32 [ %bs, %for.cond1.preheader.lr.ph ], [ %dec, %for.inc8 ]
36  br i1 %cmp218, label %for.body3.lr.ph, label %for.inc8
37
38for.body3.lr.ph:
39  %add = add nsw i32 %r.021, 1
40  %mul = mul nsw i32 %add, %stride
41  %add4 = add i32 %mul, -1
42  %mul5 = mul nsw i32 %r.021, %stride
43  br label %for.body3
44
45for.body3:
46  %c.019 = phi i32 [ 0, %for.body3.lr.ph ], [ %inc, %for.body3 ]
47  %sub = add i32 %add4, %c.019
48  %arrayidx = getelementptr inbounds i8, i8* %dst, i32 %sub
49  %0 = load i8, i8* %arrayidx, align 1
50  %add6 = add nsw i32 %c.019, %mul5
51  %arrayidx7 = getelementptr inbounds i8, i8* %dst, i32 %add6
52  store i8 %0, i8* %arrayidx7, align 1
53  %inc = add nsw i32 %c.019, 1
54  %cmp2 = icmp slt i32 %inc, %bs
55  br i1 %cmp2, label %for.body3, label %for.cond1.for.inc8_crit_edge
56
57for.cond1.for.inc8_crit_edge:
58  br label %for.inc8
59
60for.inc8:
61  %dec = add nsw i32 %r.021, -1
62  %cmp = icmp sgt i32 %dec, -1
63  br i1 %cmp, label %for.cond1.preheader, label %for.cond.for.end9_crit_edge
64
65for.cond.for.end9_crit_edge:
66  br label %for.end9
67
68for.end9:
69  ret void
70}
71