[PATCH] D104636: [LoopIdiom] [LoopNest] let the pass deal with runtime memset size

Mon Jul 26 13:45:27 PDT 2021

efriedma added a comment.

In D104636#2905451 <https://reviews.llvm.org/D104636#2905451>, @efriedma wrote:

> In D104636#2902181 <https://reviews.llvm.org/D104636#2902181>, @eopXD wrote:
>
>> - no need to check overflow, the assumption is no consecutive memory exceeds 2^N (where N is DataLayout::getIndexTypeSizeInBits()).
>
> Maybe to be conservative, restrict this to memset in address-space zero.

The reason for this is that in other address-spaces, you might need to saturate the memset amount, instead of just ignoring overflow, I think.

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