================
@@ -1764,6 +1764,13 @@ class TargetInfo : public TransferrableTargetInfo,
return 0;
}
+ /// \returns Target specific flat ptr address space; a flat ptr is a ptr that
+ /// can be casted to / from all other target address spaces. If the target
+ /// exposes no such address space / does not care, we return 0.
----------------
arsenm wrote:
> here's no such thing as LangAS::Generic, there's LangAS::Default.
Right, so query the target address space map for that.
The IR does not have the concept of a generic, flat, or no address space. 0 is
the "default address space", which has its own specific properties.
> this merely maintains the status quo, wherein everybody grabs an AS 0 pointer
> and hopes for the best.
For the most part this isn't true, at least in llvm proper.
>From the comment here, I'm not even sure what this is returning (either an IR
>address space or a clang address space)
https://github.com/llvm/llvm-project/pull/95728
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