[PATCH] D65460: [AArch64][GlobalISel] Support the neg_addsub_shifted_imm32 pattern

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
paquette added a reviewer: aemerson.
Herald added subscribers: Petar.Avramovic, hiraditya, kristof.beyls, javed.absar, rovka.
Herald added a project: LLVM.

Add an equivalent ComplexRendererFns function for SelectNegArithImmed. This allows us to select immediate adds of -1 by turning them into subtracts.

Update select-binop.mir to show that the pattern works.


https://reviews.llvm.org/D65460

Files:
  llvm/lib/Target/AArch64/AArch64InstrFormats.td
  llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/select-binop.mir

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