rjmccall added inline comments.
================
Comment at: clang/include/clang/Basic/TargetInfo.h:763
+ /// Set the address space for functions for the given target.
+ virtual void setProgramAddressSpace() { ProgramAddrSpace = 0; }
+
----------------
eandrews wrote:
> I'm not entirely sure about setting the default value to zero here. I set it
> to 0 here based on default value for ProgramAddrSpace in DataLayout class
> (https://llvm.org/doxygen/DataLayout_8cpp_source.html#l00186)
>
> Targets with non-zero value should override this function. I do not know what
> these targets are (if any). I ran check-llvm and nothing failed.
I don't think you need this method; targets that want to change the program
address space can just set it during construction, since it's a protected
field. I know there are some existing places that use this virtual `set`
pattern, but there doesn't seem to be a good reason for it.
Looks like AVR sets the program address space to 1. (I did a regexp search for
`/["-]P[0-9]/` in `lib/Basic/`.)
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D111566/new/
https://reviews.llvm.org/D111566
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