[PATCH] D37445: [globalisel][tablegen] Map ld and st to G_LOAD and G_STORE. NFC

[Daniel Sanders via Phabricator via llvm-commits]

dsanders created this revision.
Herald added subscribers: igorb, kristof.beyls.

There is an important mismatch between ISD::LOAD and G_LOAD (and likewise for
ISD::STORE and G_STORE). In SelectionDAG, ISD::LOAD is a non-atomic load
and atomic loads are handled by a separate node. However, this is not true of
GlobalISel's G_LOAD. For G_LOAD, the MachineMemOperand indicates the atomicity
of the operation. As a result, this mapping must also add a predicate that
checks for non-atomic MachineMemOperands.

This is NFC since these nodes always have predicates in practice and are
therefore always rejected at the moment.

Depends on https://reviews.llvm.org/D37443


https://reviews.llvm.org/D37445

Files:
  include/llvm/CodeGen/GlobalISel/InstructionSelector.h
  include/llvm/CodeGen/GlobalISel/InstructionSelectorImpl.h
  include/llvm/Target/GlobalISel/SelectionDAGCompat.td
  utils/TableGen/GlobalISelEmitter.cpp

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