1; RUN: opt -S  -loop-reroll   %s | FileCheck %s
2target triple = "aarch64--linux-gnu"
3@buf = global [16 x i8] c"\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A\0A", align 1
4
5define i32 @test1(i32 %len, i8* nocapture readonly %buf) #0 {
6entry:
7  %cmp.13 = icmp sgt i32 %len, 1
8  br i1 %cmp.13, label %while.body.lr.ph, label %while.end
9
10while.body.lr.ph:                                 ; preds = %entry
11  br label %while.body
12
13while.body:
14;CHECK-LABEL: while.body:
15;CHECK-NEXT:    %indvar = phi i32 [ %indvar.next, %while.body ], [ 0, %while.body.lr.ph ]
16;CHECK-NEXT:    %sum4.015 = phi i64 [ 0, %while.body.lr.ph ], [ %add, %while.body ]
17;CHECK-NOT:     %sub5 = add nsw i32 %len.addr.014, -1
18;CHECK-NOT:     %sub5 = add nsw i32 %len.addr.014, -2
19;CHECK:    br i1 %exitcond, label %while.cond.while.end_crit_edge, label %while.body
20
21  %sum4.015 = phi i64 [ 0, %while.body.lr.ph ], [ %add4, %while.body ]
22  %len.addr.014 = phi i32 [ %len, %while.body.lr.ph ], [ %sub5, %while.body ]
23  %idxprom = sext i32 %len.addr.014 to i64
24  %arrayidx = getelementptr inbounds i8, i8* %buf, i64 %idxprom
25  %0 = load i8, i8* %arrayidx, align 1
26  %conv = zext i8 %0 to i64
27  %add = add i64 %conv, %sum4.015
28  %sub = add nsw i32 %len.addr.014, -1
29  %idxprom1 = sext i32 %sub to i64
30  %arrayidx2 = getelementptr inbounds i8, i8* %buf, i64 %idxprom1
31  %1 = load i8, i8* %arrayidx2, align 1
32  %conv3 = zext i8 %1 to i64
33  %add4 = add i64 %add, %conv3
34  %sub5 = add nsw i32 %len.addr.014, -2
35  %cmp = icmp sgt i32 %sub5, 1
36  br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge
37
38while.cond.while.end_crit_edge:                   ; preds = %while.body
39  %add4.lcssa = phi i64 [ %add4, %while.body ]
40  %phitmp = trunc i64 %add4.lcssa to i32
41  br label %while.end
42
43while.end:                                        ; preds = %while.cond.while.end_crit_edge, %entry
44  %sum4.0.lcssa = phi i32 [ %phitmp, %while.cond.while.end_crit_edge ], [ 0, %entry ]
45  ret i32 %sum4.0.lcssa
46  unreachable
47}
48
49