[PATCH] D78625: [ARM] Distribute post-inc for Thumb2 sing/zero extending loads/stores

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, samparker, efriedma, ostannard, simon_tatham.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
dmgreen retitled this revision from "[ARM] Distribute post-inc for " to "[ARM] Distribute post-inc for Thumb2 sing/zero extending loads/stores".
dmgreen added a parent revision: D77813: [ARM] Distribute MVE post-increments.

This adds sign/zero extending scalar loads/stores to the MVE instructions added in D77813 <https://reviews.llvm.org/D77813>, allowing us to pick up more post-inc situations. These are comparatively simple, compared to LDR/STR (which may be better turned into an LDRD/LDM), but still require some additions over MVE instructions. Because there are i12 and i8 variants of the offset loads/stores dealing with different signs, we may need to convert an i12 address to a i8 negative instruction.


https://reviews.llvm.org/D78625

Files:
  llvm/lib/Target/ARM/ARMBaseInstrInfo.h
  llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/mve-float-loops.ll
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/mve-tail-data-types.ll
  llvm/test/CodeGen/Thumb2/mve-float16regloops.ll
  llvm/test/CodeGen/Thumb2/mve-postinc-distribute.ll
  llvm/test/CodeGen/Thumb2/postinc-distribute.mir

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