[PATCH] D111132: [GlobalISel] Better verification of G_UNMERGE_VALUES

Tue Oct 19 06:01:31 PDT 2021

foad added a comment.

In D111132#3071399 <https://reviews.llvm.org/D111132#3071399>, @arsenm wrote:

> In D111132#3042221 <https://reviews.llvm.org/D111132#3042221>, @foad wrote:
>
>>> 2. Splitting a vector into its elements (the converse of G_BUILD_VECTOR).
>>
>> Is there any appetite for using a new G_SPLIT_VECTOR opcode for this case?
>
> I don't see a reason to have a scalar and vector version of the same thing.

You mean, splitting a vector into vectors vs splitting a vector into scalars? Then why do we have both G_BUILD_VECTOR and G_CONCAT_VECTORS? The asymmetry annoys me!

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  https://reviews.llvm.org/D111132/new/

https://reviews.llvm.org/D111132