1 ; RUN: opt -S -loop-reroll %s | FileCheck %s
2 target 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
5 define i32 @test1(i32 %len, i8* nocapture readonly %buf) #0 {
7 %cmp.13 = icmp sgt i32 %len, 1
8 br i1 %cmp.13, label %while.body.lr.ph, label %while.end
10 while.body.lr.ph: ; preds = %entry
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
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
38 while.cond.while.end_crit_edge: ; preds = %while.body
39 %add4.lcssa = phi i64 [ %add4, %while.body ]
40 %phitmp = trunc i64 %add4.lcssa to i32
43 while.end: ; preds = %while.cond.while.end_crit_edge, %entry
44 %sum4.0.lcssa = phi i32 [ %phitmp, %while.cond.while.end_crit_edge ], [ 0, %entry ]