[PATCH] D128551: [NFC][HWASan] Refactor hwasan pass

[Leonard Chan via Phabricator via llvm-commits]

leonardchan created this revision.
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This moves some code for getting PC and SP into their own functions. Since SP is also retrieved in the prologue and getting the stack tag, we can cache the SP if we get it once in the prologue. This caching will really only be relevant in D128387 <https://reviews.llvm.org/D128387> where `StackBaseTag` may not be set in the prologue if `__hwasan_tls` is not used.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128551

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

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