[llvm] [HWASAN] Follow up for #83503 implement selective instrumentation (PR #83942)

[Dmitry Vyukov via llvm-commits]

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@@ -1527,6 +1533,9 @@ void HWAddressSanitizer::sanitizeFunction(Function &F,
 
   NumTotalFuncs++;
   if (CSkipHotCode) {
+    if ((F.getGUID() % MaxRandomRate) < SkipInstRandomRate) {
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dvyukov wrote:

Module::createRNG docs are unclear:
"The RNG can be seeded via -rng-seed=<uint64> and is salted with the ModuleID and the provided pass salt."

What is ModuleID? Does it change on code changes?

https://github.com/llvm/llvm-project/pull/83942