[globalisel][legalizerinfo] Add support for legalization based on the MachineMemOperand
Summary:
Currently only the memory size is supported but others can be added as
needed.
narrowScalar for G_LOAD and G_STORE now correctly update the
MachineMemOperand and will refuse to legalize atomics since those need more
careful expansions to maintain atomicity.
Reviewers: ab, aditya_nandakumar, bogner, rtereshin, aemerson, javed.absar
Reviewed By: aemerson
Subscribers: aemerson, rovka, kristof.beyls, javed.absar, llvm-commits
Differential Revision: https://reviews.llvm.org/D45466
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331071 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed