Enable tracing of inlining decisions.
Output format:
  compilation of 'Signature of the compilation root method':
    at 'Signature of the root method' ['Bytecode index']: <'Phase'> 'Child method signature': 'Decision made about this callsite'
      at 'Signature of the child method' ['Bytecode index']: 
         |--<'Phase 1'> 'Grandchild method signature': 'First decision made about this callsite'
         \--<'Phase 2'> 'Grandchild method signature': 'Second decision made about this callsite'
      at 'Signature of the child method' ['Bytecode index']: <'Phase'> 'Another grandchild method signature': 'The only decision made about this callsite.'
