2 ; RUN: opt < %s -disable-output -stats -loop-unroll -unroll-runtime -unroll-partial-threshold=200 -unroll-threshold=400 -info-output-file - | FileCheck %s --check-prefix=STATS
3 ; RUN: opt < %s -disable-output -stats -passes='require<opt-remark-emit>,unroll' -unroll-runtime -unroll-partial-threshold=200 -unroll-threshold=400 -info-output-file - | FileCheck %s --check-prefix=STATS
5 ; Test that nested loops can be unrolled. We need to increase threshold to do it
7 ; STATS: 2 loop-unroll - Number of loops unrolled (completely or otherwise)
9 define i32 @nested(i32* nocapture %a, i32 %n, i32 %m) nounwind uwtable readonly {
11 %cmp11 = icmp sgt i32 %n, 0
12 br i1 %cmp11, label %for.cond1.preheader.lr.ph, label %for.end7
14 for.cond1.preheader.lr.ph: ; preds = %entry
15 %cmp28 = icmp sgt i32 %m, 0
16 br label %for.cond1.preheader
18 for.cond1.preheader: ; preds = %for.inc5, %for.cond1.preheader.lr.ph
19 %indvars.iv16 = phi i64 [ 0, %for.cond1.preheader.lr.ph ], [ %indvars.iv.next17, %for.inc5 ]
20 %sum.012 = phi i32 [ 0, %for.cond1.preheader.lr.ph ], [ %sum.1.lcssa, %for.inc5 ]
21 br i1 %cmp28, label %for.body3, label %for.inc5
23 for.body3: ; preds = %for.cond1.preheader, %for.body3
24 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body3 ], [ 0, %for.cond1.preheader ]
25 %sum.19 = phi i32 [ %add4, %for.body3 ], [ %sum.012, %for.cond1.preheader ]
26 %0 = add nsw i64 %indvars.iv, %indvars.iv16
27 %arrayidx = getelementptr inbounds i32, i32* %a, i64 %0
28 %1 = load i32, i32* %arrayidx, align 4
29 %add4 = add nsw i32 %1, %sum.19
30 %indvars.iv.next = add i64 %indvars.iv, 1
31 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
32 %exitcond = icmp eq i32 %lftr.wideiv, %m
33 br i1 %exitcond, label %for.inc5, label %for.body3
35 for.inc5: ; preds = %for.body3, %for.cond1.preheader
36 %sum.1.lcssa = phi i32 [ %sum.012, %for.cond1.preheader ], [ %add4, %for.body3 ]
37 %indvars.iv.next17 = add i64 %indvars.iv16, 1
38 %lftr.wideiv18 = trunc i64 %indvars.iv.next17 to i32
39 %exitcond19 = icmp eq i32 %lftr.wideiv18, %n
40 br i1 %exitcond19, label %for.end7, label %for.cond1.preheader
42 for.end7: ; preds = %for.inc5, %entry
43 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %sum.1.lcssa, %for.inc5 ]