[llvm] [TLI] Add support for inferring attr `cold`/`noreturn` on `std::terminate` and `__cxa_throw` (PR #101622)

[Evgenii Kudriashov via llvm-commits]

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@@ -66,6 +67,14 @@ static bool setIsCold(Function &F) {
   return true;
 }
 
+static bool setNoReturn(Function &F) {
+  if (F.hasFnAttribute(Attribute::NoReturn))
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e-kud wrote:

Wouldn't it better to use `F.doesNotReturn()` and `setDoesNotReturn` as it is in `setDoesNotAccessMemory` instead of checking attributes explicitly? And rename to `setDoesNotReturn` probably...

https://github.com/llvm/llvm-project/pull/101622