tra added a comment.
In D78655#2107190 <https://reviews.llvm.org/D78655#2107190>, @yaxunl wrote:
> It seems we can only promote non-capturing lambdas, no matter whether it has
> enclosing function or not.
I'd be OK with promoting only non-capturing lambdas until we figure out a
consistent way to deal with the capturing ones.
Or we can promote captured ones, too and rely on postponed diags to guard
against producing wrong-side code. We may need to improve that a bit anyways.
E.g. what should we do if I write something like this:
__device__ int dv;
int hv;
__host__ __device__ int hd() {
return [a = dv, b=hv](){ return a + b;}();
}
https://godbolt.org/z/op_FE6 -- NVCC complains about not being able to access
hv in a device function (which makes sense considering that it converts HD -> D
after source splitting, but clang happily allows capturing both variables (but
will likely fail during ptxas due to the fact that there will be no hv on
device side).
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https://reviews.llvm.org/D78655
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