rjmccall added inline comments.
================
Comment at: lib/Sema/TreeTransform.h:5363
+ if (ResultType.getAddressSpace() != LangAS::Default &&
+ (ResultType.getAddressSpace() != LangAS::opencl_private)) {
SemaRef.Diag(TL.getReturnLoc().getBeginLoc(),
----------------
Anastasia wrote:
> I am trying to be a bit more helpful here although I am not sure if we should
> instead require explicit template parameter and fail the template deduction
> instead.
>
> Basically, do we want the following code to always require specifying
> template argument explicitly:
>
>
> ```
> template <class T>
> T xxx(T *in) {
> T *i = in;
> return *i;
> }
>
> __kernel void test() {
> int foo[10];
> xxx<int>(&foo[0]); // if we deduce type from foo, it ends up being
> qualified by __private that we currently diagnose. However private is default
> (implicit) address space for return type so technically there is no danger in
> just allowing xxx(&foo[0])
> }
> ```
Implicitly ignoring all address-space qualifiers on the return type seems like
the right thing to do; I don't think it needs to be limited to `__private`.
That's probably also the right thing to do for locals, but I'm less certain
about it.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D62584/new/
https://reviews.llvm.org/D62584
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