[PATCH] D110724: [MSP430] Add support for the `rpt` assembler directive

[Jozef Lawrynowicz via Phabricator via llvm-commits]

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The `rpt` directive is used to set the repetition count of MSP430X
extended instructions that have an extension word. This patch adds
support for using the `rpt` directive with RxxX shifts, so shift counts
of up to 16 can be performed using a single instruction.

The `rpt` directive must appear before the corresponding MSP430X
instruction, either on the same line, or the line before. For example:

  rpt #9 { rrux r12

and

  rpt #9
  rrux r12

are both supported.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110724

Files:
  llvm/lib/Target/MSP430/AsmParser/MSP430AsmParser.cpp
  llvm/lib/Target/MSP430/MCTargetDesc/MSP430InstPrinter.cpp
  llvm/lib/Target/MSP430/MCTargetDesc/MSP430MCCodeEmitter.cpp
  llvm/lib/Target/MSP430/MSP430InstrFormats.td
  llvm/lib/Target/MSP430/MSP430InstrInfo.h
  llvm/lib/Target/MSP430/MSP430InstrInfoExtended.td
  llvm/test/MC/MSP430/shifts-430x-invalid.s
  llvm/test/MC/MSP430/shifts-430x.s

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