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      1 ; RUN: llc -march=hexagon < %s | FileCheck %s
      2 ;
      3 ; Check that this testcase doesn't crash.
      4 ; CHECK: vadd
      5 
      6 target triple = "hexagon"
      7 
      8 define void @fred() #0 {
      9 b0:
     10   br label %b1
     11 
     12 b1:                                               ; preds = %b7, %b0
     13   %v2 = phi i32 [ 0, %b0 ], [ %v16, %b7 ]
     14   %v3 = phi <32 x i32> [ undef, %b0 ], [ %v15, %b7 ]
     15   %v4 = icmp slt i32 %v2, undef
     16   br i1 %v4, label %b5, label %b7
     17 
     18 b5:                                               ; preds = %b1
     19   %v6 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v3, <32 x i32> undef)
     20   br label %b7
     21 
     22 b7:                                               ; preds = %b5, %b1
     23   %v8 = phi <32 x i32> [ %v6, %b5 ], [ %v3, %b1 ]
     24   %v9 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v8, <32 x i32> undef)
     25   %v10 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v9, <32 x i32> undef)
     26   %v11 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v10, <32 x i32> undef)
     27   %v12 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v11, <32 x i32> undef)
     28   %v13 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v12, <32 x i32> zeroinitializer)
     29   %v14 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v13, <32 x i32> undef)
     30   %v15 = tail call <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32> %v14, <32 x i32> undef)
     31   %v16 = add nsw i32 %v2, 8
     32   %v17 = icmp eq i32 %v16, 64
     33   br i1 %v17, label %b18, label %b1
     34 
     35 b18:                                              ; preds = %b7
     36   tail call void @f0() #0
     37   ret void
     38 }
     39 
     40 declare <32 x i32> @llvm.hexagon.V6.vaddhsat.128B(<32 x i32>, <32 x i32>) #1
     41 declare void @f0() #0
     42 
     43 attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="+hvx,+hvx-length128b" }
     44 attributes #1 = { nounwind readnone }
     45