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[LLDB] Fix handling of bit-fields when there is a base class when par…
…sing DWARF When parsing DWARF and laying out bit-fields we currently don't take into account whether we have a base class or not. Currently if the first field is a bit-field but the bit offset is due a field we inherit from a base class we currently treat it as an unnamed bit-field and therefore add an extra field. This fix will not check if we have a base class and assume that this offset is due to members we are inheriting from the base. We are currently seeing asserts during codegen when debugging clang::DiagnosticOptions. This assumption will fail in the case where the first field in the derived class in an unnamed bit-field. Fixing the first field being an unnamed bit-field looks like it will require a larger change since we will need a way to track or discover the last field offset of the bases(s). Differential Revision: https://reviews.llvm.org/D76808 (cherry picked from commit 00c8120)
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