Adrian Prantl 03dd6f5739 Use a stable topological sort in DwarfCompileUnit::createScopeChildrenDIE() ...

This addresses review feedback for D42940. The topological sort is
slightly more expensive but it can now also detect cycles in the
dependencies and actually works correctly.

rdar://problem/37217988

Differential Review: https://reviews.llvm.org/D43036

llvm-svn: 324677

2018-02-08 23:21:15 +00:00

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