[PATCH] D31772: [PowerPC] Add pass to expand extra memcpy calls

[Sean Fertile via Phabricator via llvm-commits]

sfertile created this revision.
Herald added a subscriber: mgorny.

This patch adds a new Ir-Ir pass in the PPC back-end that expands memcpy calls. There are 2 types of expansion added:

1. calls where the size is a known compile time constant, but are large enough that we either don't want to or wont expand them with the straight line expansion.
2. Expand calls where the size isn't a compile time constant.

This patch is to be followed up with a subsequent patch which will leverage pgo profiling data to make better decisions about when and under what conditions to actually perform these expansions.


Repository:
  rL LLVM

https://reviews.llvm.org/D31772

Files:
  lib/Target/PowerPC/CMakeLists.txt
  lib/Target/PowerPC/PPC.h
  lib/Target/PowerPC/PPCLowerIntrinsics.cpp
  lib/Target/PowerPC/PPCTargetMachine.cpp

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