[PATCH] D68916: [ARM] Accept ldrb.w mnemonic for certain addressing modes (PR43382)

[Momchil Velikov via Phabricator via llvm-commits]

chill created this revision.
chill added reviewers: efriedma, grosbach.
Herald added subscribers: llvm-commits, hiraditya, kristof.beyls.
Herald added a project: LLVM.

Encoding T3 of `ldrb` in A7.7.46 (Armv7-M ARM Revidion E.d) offset allows the ".w" mnemonic suffix, even
though the preferred disassembly is without the suffix.
We did not accept the suffix; this patch fixes it by adding a few instruction aliases.

Is there a less hackish way of doing it ?


https://reviews.llvm.org/D68916

Files:
  llvm/lib/Target/ARM/ARMInstrThumb2.td
  llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
  llvm/test/MC/ARM/basic-thumb2-instructions.s

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