[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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@@ -274,6 +274,14 @@ static cl::opt<bool>
                  cl::desc("propagate shadow through ICmpEQ and ICmpNE"),
                  cl::Hidden, cl::init(true));
 
+static cl::opt<uint> ClEmbedFaultingInst(
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fmayer wrote:

should this be an enum with  descriptive names?

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