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      1 ; RUN: opt -licm -S < %s | FileCheck %s
      2 
      3 define void @f() {
      4 ; CHECK-LABEL: @f(
      5 entry:
      6   br label %bb0
      7 
      8 bb0:
      9   %tobool7 = icmp eq i1 undef, undef
     10   br label %bb1
     11 
     12 bb1:
     13   br i1 undef, label %bb0, label %bb0
     14 
     15 unreachable:
     16 ; CHECK-LABEL: unreachable:
     17 ; CHECK:   br i1 undef, label %unreachable, label %unreachable
     18   br i1 %tobool7, label %unreachable, label %unreachable
     19 
     20 bb3:
     21   unreachable
     22 }
     23