[compiler-rt] [llvm] [nsan] Emit calls to optimized functions (PR #98900)

[Dmitriy Chestnykh via llvm-commits]

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@@ -493,6 +494,103 @@ class ValueToShadowMap {
   DenseMap<Value *, Value *> Map;
 };
 
+// Base class for handling some details of __nsan_* functions
+class NsanInstrumentationFunction {
+public:
+  virtual std::pair<FunctionCallee, int>
+  getCalleeAndNumArgsForMemoryOp(const uint64_t MemOpSize) const = 0;
+  virtual FunctionCallee getGeneralFunction() const = 0;
+  virtual ~NsanInstrumentationFunction() = default;
+};
+
+// Helper class for __nsan_copy_* family
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chestnykh wrote:

Done. I use the second template argument to pass information about number of arguments of the functions represented by the instance

https://github.com/llvm/llvm-project/pull/98900