| Brendon Cahoon | bece8ed | 2015-05-08 20:18:21 +0000 | [diff] [blame] | 1 | ; RUN: llc -march=hexagon -mcpu=hexagonv5 -hexagon-hwloop-preheader < %s |
| 2 | ; REQUIRES: asserts |
| 3 | |
| 4 | ; Test that the preheader is added to the parent loop, otherwise |
| 5 | ; we generate an invalid hardware loop. |
| 6 | |
| 7 | ; Function Attrs: nounwind readonly |
| 8 | define void @test(i16 signext %n) #0 { |
| 9 | entry: |
| 10 | br i1 undef, label %for.cond4.preheader.preheader.split.us, label %for.end22 |
| 11 | |
| 12 | for.cond4.preheader.preheader.split.us: |
| 13 | %0 = sext i16 %n to i32 |
| 14 | br label %for.body9.preheader.us |
| 15 | |
| 16 | for.body9.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 |
| 22 | |
| 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 |
| 26 | |
| 27 | 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 |
| 30 | |
| 31 | for.end.loopexit.us: |
| 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 |
| 35 | |
| 36 | for.end22: |
| 37 | ret void |
| 38 | } |
| 39 | |
| 40 | 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" } |