[flang-commits] [flang] [flang]Add new intrinsic function backtrace and complete the TODO of abort (PR #117603)

[via flang-commits]

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@@ -1336,6 +1336,7 @@ static const IntrinsicInterface intrinsicSubroutine[]{
             {"stat", AnyInt, Rank::scalar, Optionality::optional,
                 common::Intent::Out}},
         {}, Rank::elemental, IntrinsicClass::atomicSubroutine},
+    {"backtrace", {}, {}, Rank::elemental, IntrinsicClass::pureSubroutine},
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jeanPerier wrote:

I do not think that `Exit` can be rewritten without front-end support because it has an OPTIONAL arguments, so it requires an explicit interface. Maybe `Abort` could be handled without front-end support, however, I think its NORETURN aspect is something that may be valuable to lowering (not leveraged yet), so it may be worth keeping it like this. @klausler, do you agree `Abort` and `Exit` need or benefit from front-end support, while `Backtrace` does not?

https://github.com/llvm/llvm-project/pull/117603