[PATCH] D42123: Derive GEP index type from Data Layout

[Elena Demikhovsky via Phabricator via llvm-commits]

delena added a comment.

  " > We have addressed this by adding explicit PTRADD SelectionDAG nodes, which perform pointer + integer addition. For complex addressing modes, we end up with (ptradd base (some complex integer ops)). This works well as long as the underlying hardware supports address register + integer register addressing, which I presume is the case for Intel (it is for all Harvard architectures that I've come across)."

Yes, we also added ADDPTR node for SelectionDAG and we have more changes related to the special pointer type. Apparently, the codegen does not work with MVT::Ptr.
We can try to upstream the part of DAG builder, that makes ADDPTR from GEP.


Repository:
  rL LLVM

https://reviews.llvm.org/D42123