1; RUN: opt < %s -S -loop-unroll -mtriple aarch64 -mcpu=cortex-a57 | FileCheck %s
2
3; Tests for unrolling loops with run-time trip counts
4
5; CHECK:  %xtraiter = and i32 %n
6; CHECK:  %lcmp.mod = icmp ne i32 %xtraiter, 0
7; CHECK:  br i1 %lcmp.mod, label %for.body.prol, label %for.body.preheader.split
8
9; CHECK:  for.body.prol:
10; CHECK:  for.body:
11
12define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly {
13entry:
14  %cmp1 = icmp eq i32 %n, 0
15  br i1 %cmp1, label %for.end, label %for.body
16
17for.body:                                         ; preds = %for.body, %entry
18  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
19  %sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
20  %arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
21  %0 = load i32, i32* %arrayidx, align 4
22  %add = add nsw i32 %0, %sum.02
23  %indvars.iv.next = add i64 %indvars.iv, 1
24  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
25  %exitcond = icmp eq i32 %lftr.wideiv, %n
26  br i1 %exitcond, label %for.end, label %for.body
27
28for.end:                                          ; preds = %for.body, %entry
29  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
30  ret i32 %sum.0.lcssa
31}
32
33
34