[PATCH] D149491: [msan] Improve handling of Intrinsic::is_fpclass after c55fffe

[Vitaly Buka via Phabricator via llvm-commits]

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  declare i1 @llvm.is.fpclass(<fptype> <op>, i32 <test>)
  declare <N x i1> @llvm.is.fpclass(<vector-fptype> <op>, i32 <test>)

Perfect fix will require checking bits of <op> corresponding to <test>
argument. For now just propagat shadow without reporting before
intrinsic.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D149491

Files:
  llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
  llvm/test/Instrumentation/MemorySanitizer/create-class-from-logic-fcmp.ll

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