[PATCH] D92629: [dfsan] Add empty APIs for field-level shadow

[stephan.yichao.zhao via Phabricator via llvm-commits]

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  This is a child diff of D92261.
  
  This diff adds APIs that return shadow type/value/zero from origin
  objects. For the time being these APIs simply returns primitive
  shadow type/value/zero. The following diff will be implementing the
  conversion.
  
  As D92261 explains, some cases still use primitive shadow during
  the incremential changes. The cases include
  1) alloca/load/store
  2) custom function IO
  3) vectors
  At the cases this diff does not use the new APIs, but uses primitive
  shadow objects explicitly.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D92629

Files:
  llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp

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