[PATCH] D137497: [ArgumentPromotion] Allow the frontend to specify the maximum number of elements to promote on a per-function basis via metadata.

[Patrick Walton via Phabricator via llvm-commits]

pcwalton added a comment.

As an alternative, I wonder if we could teach SROA to do a form of argument promotion for nocapture noalias readonly dereferenceable aligned arguments. If the only thing blocking an alloca from SROA is being passed into a function by nocapture noalias readonly dereferenceable aligned pointer, insert a new alloca and memcpy to "reform" the structure right before the call, change the call to pass the pointer, and then the original alloca becomes SROAable.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137497/new/

https://reviews.llvm.org/D137497