1 ; RUN: llc -march=hexagon -mcpu=hexagonv5 -hexagon-hwloop-preheader < %s
4 ; Test that the preheader is added to the parent loop, otherwise
5 ; we generate an invalid hardware loop.
7 ; Function Attrs: nounwind readonly
8 define void @test(i16 signext %n) #0 {
10 br i1 undef, label %for.cond4.preheader.preheader.split.us, label %for.end22
12 for.cond4.preheader.preheader.split.us:
13 %0 = sext i16 %n to i32
14 br label %for.body9.preheader.us
17 %indvars.iv = phi i32 [ %indvars.iv.next.7, %for.body9.us ], [ 0, %for.body9.preheader.us ]
18 %indvars.iv.next.7 = add i32 %indvars.iv, 8
19 %lftr.wideiv.7 = trunc i32 %indvars.iv.next.7 to i16
20 %exitcond.7 = icmp slt i16 %lftr.wideiv.7, 0
21 br i1 %exitcond.7, label %for.body9.us, label %for.body9.us.ur
23 for.body9.preheader.us:
24 %i.030.us.pmt = phi i32 [ %inc21.us.pmt, %for.end.loopexit.us ], [ 0, %for.cond4.preheader.preheader.split.us ]
25 br i1 undef, label %for.body9.us, label %for.body9.us.ur
28 %exitcond.ur.old = icmp eq i16 undef, %n
29 br i1 %exitcond.ur.old, label %for.end.loopexit.us, label %for.body9.us.ur
32 %inc21.us.pmt = add i32 %i.030.us.pmt, 1
33 %exitcond33 = icmp eq i32 %inc21.us.pmt, %0
34 br i1 %exitcond33, label %for.end22, label %for.body9.preheader.us
40 attributes #0 = { nounwind readonly "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }