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      1 ; RUN: opt -disable-output -debug-pass-manager \
      2 ; RUN:     -passes='no-op-loop' %s 2>&1 \
      3 ; RUN:     | FileCheck %s
      4 
      5 ;            @f()
      6 ;           /    \
      7 ;       loop.0   loop.1
      8 ;      /      \        \
      9 ; loop.0.0  loop.0.1  loop.1.0
     10 ;
     11 ; CHECK: Running pass: NoOpLoopPass on loop.1.0
     12 ; CHECK: Running pass: NoOpLoopPass on loop.1
     13 ; CHECK: Running pass: NoOpLoopPass on loop.0.0
     14 ; CHECK: Running pass: NoOpLoopPass on loop.0.1
     15 ; CHECK: Running pass: NoOpLoopPass on loop.0
     16 define void @f() {
     17 entry:
     18   br label %loop.0
     19 loop.0:
     20   br i1 undef, label %loop.0.0, label %loop.1
     21 loop.0.0:
     22   br i1 undef, label %loop.0.0, label %loop.0.1
     23 loop.0.1:
     24   br i1 undef, label %loop.0.1, label %loop.0
     25 loop.1:
     26   br i1 undef, label %loop.1, label %loop.1.bb1
     27 loop.1.bb1:
     28   br i1 undef, label %loop.1, label %loop.1.bb2
     29 loop.1.bb2:
     30   br i1 undef, label %end, label %loop.1.0
     31 loop.1.0:
     32   br i1 undef, label %loop.1.0, label %loop.1
     33 end:
     34   ret void
     35 }
     36