[PATCH] D37377: [ARM] Add 2-operand assembly aliases for Thumb1 ADD/SUB

[Oliver Stannard via Phabricator via llvm-commits]

olista01 created this revision.
Herald added subscribers: kristof.beyls, javed.absar, aemerson.

This adds 2-operand assembly aliases for these instructions:

  add r0, r1    =>   add r0, r0, r1
  sub r0, r1    =>   sub r0, r0, r1

Previously this syntax was only accepted for Thumb2 targets, where the
wide versions of the instructions were used.

This patch allows the 2-operand syntax to be used for Thumb1 targets,
and selects the narrow encoding when it is used for Thumb2 targets.


Repository:
  rL LLVM

https://reviews.llvm.org/D37377

Files:
  lib/Target/ARM/ARMInstrThumb.td
  test/MC/ARM/implicit-it-generation.s
  test/MC/ARM/thumb-add-sub-width.s

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