[llvm] [msan] Add debugging for handleUnknownIntrinsic (PR #123381)

[Florian Mayer via llvm-commits]

================
@@ -4033,6 +4041,7 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
 
   void visitIntrinsicInst(IntrinsicInst &I) {
     switch (I.getIntrinsicID()) {
+#if 0
----------------
fmayer wrote:

this seems wrong.

https://github.com/llvm/llvm-project/pull/123381