[llvm] [MSAN] handle permi2var (PR #146437)

[Thurston Dang via llvm-commits]

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@@ -4270,6 +4271,25 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     setOrigin(&I, PtrSrcOrigin);
   }
 
+  void checkPermilvarIndexShadow(IRBuilder<> &IRB, Value *Idx, Instruction *I) {
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thurstond wrote:

Assuming this will be used by handleAVXVpermi2var (current patch) and handleAVXVpermilvar (future patch?), please rename so that it's not Permilvar-specific, and also to include AVX.

https://github.com/llvm/llvm-project/pull/146437