[PATCH] D104436: [RISCV] Optimize mul-add in the zbs extension with SH*ADD

[Ben Shi via Phabricator via llvm-commits]

benshi001 added a comment.

In D104436#2823697 <https://reviews.llvm.org/D104436#2823697>, @benshi001 wrote:

> The SH1ADDUW/SH2ADDUW/SH3ADDUW are different, and my previous test cases do not patch.
>
> I will try SH1ADDUW/SH2ADDUW/SH3ADDUW next week, and you are appreciated to review current optimization with SH1ADD/SH2ADD/SH3ADD.

It seems SH1/2/3ADDUW are quite different and are not simply 32-bit SH1/2/3ADD on RV64, they can not be used to optimize mul-add.


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