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; RUN: llc -march=hexagon -mcpu=hexagonv5 -hexagon-hwloop-preheader < %s
; REQUIRES: asserts
; Test that the preheader is added to the parent loop, otherwise
; we generate an invalid hardware loop.
; Function Attrs: nounwind readonly
define void @test(i16 signext %n) #0 {
entry:
br i1 undef, label %for.cond4.preheader.preheader.split.us, label %for.end22
for.cond4.preheader.preheader.split.us:
%0 = sext i16 %n to i32
br label %for.body9.preheader.us
for.body9.us:
%indvars.iv = phi i32 [ %indvars.iv.next.7, %for.body9.us ], [ 0, %for.body9.preheader.us ]
%indvars.iv.next.7 = add i32 %indvars.iv, 8
%lftr.wideiv.7 = trunc i32 %indvars.iv.next.7 to i16
%exitcond.7 = icmp slt i16 %lftr.wideiv.7, 0
br i1 %exitcond.7, label %for.body9.us, label %for.body9.us.ur
for.body9.preheader.us:
%i.030.us.pmt = phi i32 [ %inc21.us.pmt, %for.end.loopexit.us ], [ 0, %for.cond4.preheader.preheader.split.us ]
br i1 undef, label %for.body9.us, label %for.body9.us.ur
for.body9.us.ur:
%exitcond.ur.old = icmp eq i16 undef, %n
br i1 %exitcond.ur.old, label %for.end.loopexit.us, label %for.body9.us.ur
for.end.loopexit.us:
%inc21.us.pmt = add i32 %i.030.us.pmt, 1
%exitcond33 = icmp eq i32 %inc21.us.pmt, %0
br i1 %exitcond33, label %for.end22, label %for.body9.preheader.us
for.end22:
ret void
}
attributes #0 = { nounwind readonly "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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