[PATCH] D67489: [ARM] Add a SelectTAddrModeImm7 for MVE narrow loads and stores

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: t.p.northover, samparker, SjoerdMeijer, simon_tatham, ostannard.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: LLVM.

We were previously using the SelectT2AddrModeImm7 for both normal and narrowing MVE loads/stores. As the narrowing ones do not accept sp as a register, it makes little sense to optimise a FrameIndex into the load, only to have to recover that later on. This adds a SelectTAddrModeImm7 which does not do that folding and uses it for narrowing load/store patterns.


https://reviews.llvm.org/D67489

Files:
  llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/test/CodeGen/Thumb2/mve-stack.ll

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