[AArch64] Improved bitfield instruction selection.
Summary:
For bitfield insert OR matching, check both operands for larger pattern
first before checking for smaller pattern.
Add pattern for unsigned bitfield insert-in-zero done with SHL+AND.
Resolves PR21631.
Reviewers: jmolloy, t.p.northover
Subscribers: aemerson, rengolin, llvm-commits, mcrosier
Differential Revision: http://reviews.llvm.org/D12908
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248006
91177308-0d34-0410-b5e6-
96231b3b80d8
projects / oota-llvm.git / commit