[PATCH] D147732: [AMDGPU] Add f32 permlane{16, x16} builtin variants

[Stanislav Mekhanoshin via Phabricator via cfe-commits]

rampitec added a comment.

In D147732#4249584 <https://reviews.llvm.org/D147732#4249584>, @jrbyrnes wrote:

> In D147732#4249567 <https://reviews.llvm.org/D147732#4249567>, @rampitec wrote:
>
>> Isn't it simpler to lower it to an existing int intrinsic and casts in clang?
>
> Thanks for your comment Stas!
>
> I think it would be ideal if clang inserted pure bitcasts for floats instead of fptoui when passed as operands to these builtins. My concern is -- Do you think we need to preserve the implicit casting behavior for compatibility?

You can manually lower builtin to a proper cast and intrinsic in the CGBuiltin.cpp.


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  https://reviews.llvm.org/D147732/new/

https://reviews.llvm.org/D147732