[PATCH] D43353: [X86] Add phony registers for high halves of E[A-D]X, E[SD]I, E[BS]P and EIP

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz added a comment.

Ping.

>From what I understand about the pressure estimation bug, this approach could indeed help.  For example BP could have two artificial subregisters: BPL and BPH, which would likely eliminate the synthetic units that affect the weights.


Repository:
  rL LLVM

https://reviews.llvm.org/D43353