[PATCH] D98247: [X86][AMX] Prevent transforming load pointer from <256 x i32>* to x86_amx*.

Tue Mar 9 05:43:37 PST 2021

LuoYuanke added a comment.

> See e.g. https://lists.llvm.org/pipermail/llvm-dev/2019-December/137684.html

There are already several pointer cast transform in LLVM. Does opaque pointer require change of all pointer cast in LLVM? Nevertheless, it seems opaque pointer is not related with this patch.

>> This patch is not for optimization. Since there is no HW instruction corresponding to "load x86_amx, x86_amx*", I'd like keep the load as "load <256 x i32>, <256 x i32>*" form.
>
> Let me reword: we can not use pointer element type to decide whether or not to perform a change.

Do you have any proposal for my case? The transform break the lowering of "load x86_amx, x86_amx*". I'm appreciated if you have good ideas.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D98247/new/

https://reviews.llvm.org/D98247