1 ; RUN: opt < %s -S -loop-unroll -unroll-threshold=50 -unroll-runtime -unroll-count=8 | FileCheck %s
3 ; Choose a smaller, power-of-two, unroll count if the loop is too large.
4 ; This test makes sure we're not unrolling 'odd' counts
9 ; CHECK: br i1 %exitcond.3, label %for.end.loopexit{{.*}}, label %for.body
10 ; CHECK-NOT: br i1 %exitcond.4, label %for.end.loopexit{{.*}}, label %for.body
12 define i32 @test(i32* nocapture %a, i32 %n) nounwind uwtable readonly {
14 %cmp1 = icmp eq i32 %n, 0
15 br i1 %cmp1, label %for.end, label %for.body
17 for.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* %a, i64 %indvars.iv
21 %0 = load 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
28 for.end: ; preds = %for.body, %entry
29 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]