[PATCH] D131115: [Symbolizer] Implement pc element in symbolizing filter.

[Daniel Thornburgh via Phabricator via llvm-commits]

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Implements the pc element for the symbolizing filter, including it's
"ra" and "pc" modes. Return addresses ("ra") are adjusted by
decrementing one. By default, {{{pc}}} elements are assumed to point to
precise code ("pc") locations. Backtrace elements will adopt the
opposite convention.

Along the way, some minor refactors of value printing and colorization.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131115

Files:
  llvm/docs/CommandGuide/llvm-symbolizer.rst
  llvm/docs/SymbolizerMarkupFormat.rst
  llvm/include/llvm/DebugInfo/Symbolize/MarkupFilter.h
  llvm/lib/DebugInfo/Symbolize/MarkupFilter.cpp
  llvm/test/DebugInfo/symbolize-filter-markup-pc.test

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