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1; REQUIRES: asserts2; RUN: opt < %s -disable-output -stats -passes=loop-unroll -unroll-runtime -unroll-partial-threshold=200 -unroll-threshold=400 -info-output-file - | FileCheck %s --check-prefix=STATS3; RUN: opt < %s -disable-output -stats -passes='require<opt-remark-emit>,loop-unroll' -unroll-runtime -unroll-partial-threshold=200 -unroll-threshold=400 -info-output-file - | FileCheck %s --check-prefix=STATS4 5; Test that nested loops can be unrolled. We need to increase threshold to do it6 7; STATS: 2 loop-unroll - Number of loops unrolled (completely or otherwise)8 9define i32 @nested(ptr nocapture %a, i32 %n, i32 %m) nounwind uwtable readonly {10entry:11 %cmp11 = icmp sgt i32 %n, 012 br i1 %cmp11, label %for.cond1.preheader.lr.ph, label %for.end713 14for.cond1.preheader.lr.ph: ; preds = %entry15 %cmp28 = icmp sgt i32 %m, 016 br label %for.cond1.preheader17 18for.cond1.preheader: ; preds = %for.inc5, %for.cond1.preheader.lr.ph19 %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.inc522 23for.body3: ; preds = %for.cond1.preheader, %for.body324 %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.iv1627 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %028 %1 = load i32, ptr %arrayidx, align 429 %add4 = add nsw i32 %1, %sum.1930 %indvars.iv.next = add i64 %indvars.iv, 131 %lftr.wideiv = trunc i64 %indvars.iv.next to i3232 %exitcond = icmp eq i32 %lftr.wideiv, %m33 br i1 %exitcond, label %for.inc5, label %for.body334 35for.inc5: ; preds = %for.body3, %for.cond1.preheader36 %sum.1.lcssa = phi i32 [ %sum.012, %for.cond1.preheader ], [ %add4, %for.body3 ]37 %indvars.iv.next17 = add i64 %indvars.iv16, 138 %lftr.wideiv18 = trunc i64 %indvars.iv.next17 to i3239 %exitcond19 = icmp eq i32 %lftr.wideiv18, %n40 br i1 %exitcond19, label %for.end7, label %for.cond1.preheader41 42for.end7: ; preds = %for.inc5, %entry43 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %sum.1.lcssa, %for.inc5 ]44 ret i32 %sum.0.lcssa45}46 47