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      1 ; RUN: llc < %s -march=bfin -join-liveintervals=0 -verify-machineinstrs
      2 ; RUN: llc < %s -march=bfin -join-liveintervals=0 -verify-machineinstrs -regalloc=greedy
      3 
      4 ; Provoke an error in LowerSubregsPass::LowerExtract where the live range of a
      5 ; super-register is illegally extended.
      6 
      7 define i16 @f(i16 %x1, i16 %x2, i16 %x3, i16 %x4) {
      8   %y1 = add i16 %x1, 1
      9   %y2 = add i16 %x2, 2
     10   %y3 = add i16 %x3, 3
     11   %y4 = add i16 %x4, 4
     12   %z12 = add i16 %y1, %y2
     13   %z34 = add i16 %y3, %y4
     14   %p = add i16 %z12, %z34
     15   ret i16 %p
     16 }
     17