[compiler-rt] [llvm] [msan] Add experimental '-mllvm -msan-embed-faulting-instruction' and MSAN_OPTIONS=print_faulting_instruction (PR #136539)

[Florian Mayer via llvm-commits]

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@@ -873,16 +926,22 @@ void MemorySanitizer::createUserspaceApi(Module &M,
   // Create the callback.
   // FIXME: this function should have "Cold" calling conv,
   // which is not yet implemented.
+  StringRef WarningFnName = getWarningFnName(
+      TrackOrigins, Recover,
+      ClEmbedFaultingInst != MSanEmbedFaultingInstructionMode::None);
+  SmallVector<Type *, 4> ArgsTy = {};
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fmayer wrote:

Should't this be `SmallVector<Type *, 2>`? I don't see four things being put in

https://github.com/llvm/llvm-project/pull/136539