[PATCH] D136523: [MSAN] Add handleCountZeroes for vector versions of ctlz and cttz.

[Kevin Athey via Phabricator via llvm-commits]

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This addresses a bug where vector versions of ctlz are creating false positive reports.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136523

Files:
  llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
  llvm/test/Instrumentation/MemorySanitizer/count-zeroes.ll

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