tree 40377bf31ed77b41025b23de96dc784dddba8d90
parent cbe99db55581f2850dd99290827c59b204c099d6
author Sam Parker <sam.parker@arm.com> 1512486827 +0000
committer Sam Parker <sam.parker@arm.com> 1512486827 +0000

[DAGCombine] Move AND nodes to multiple load leaves

Search from AND nodes to find whether they can be propagated back to
loads, so that the AND and load can be combined into a narrow load.
We search through OR, XOR and other AND nodes and all bar one of the
leaves are required to be loads or constants. The exception node then
needs to be masked off meaning that the 'and' isn't removed, but the
loads(s) are narrowed still.

Differential Revision: https://reviews.llvm.org/D39604


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@319773 91177308-0d34-0410-b5e6-96231b3b80d8