[Sparc] Use ANDN instead of AND if constant can be encoded more efficiently
Summary:
In the case of (and reg, constant) or (or reg, constant), it can be
beneficial to use a ANDNrr/ORNrr instruction instead of ANDrr/ORrr,
if the complement of the constant can be encoded using a single SETHI
instruction instead of a SETHI/ORri pair.
If the constant has more than one use, it is probably better to keep it
in its original form.
Reviewers: jyknight, venkatra
Reviewed By: jyknight
Subscribers: fedor.sergeev, jrtc27, llvm-commits
Differential Revision: https://reviews.llvm.org/D50964
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@341069 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed