[all-commits] [llvm/llvm-project] bcc1ab: [SystemZ] Introducing assembler dialects for the Z...

[Kai Nacke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: bcc1aba6c4ee657840a306eadafa371cecd6a957
      https://github.com/llvm/llvm-project/commit/bcc1aba6c4ee657840a306eadafa371cecd6a957
  Author: Anirudh Prasad <Anirudh.Prasad at ibm.com>
  Date:   2021-02-26 (Fri, 26 Feb 2021)

  Changed paths:
    M llvm/lib/Target/SystemZ/AsmParser/SystemZAsmParser.cpp
    M llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmInfo.cpp
    M llvm/lib/Target/SystemZ/SystemZ.td
    M llvm/lib/Target/SystemZ/SystemZInstrFormats.td

  Log Message:
  -----------
  [SystemZ] Introducing assembler dialects for the Z backend

- This patch introduces a different assembler dialect ("hlasm") for z/OS.
  The default dialect has now been given the "att" dialect name. For this
  appropriate changes have been added to SystemZ.td.
- This patch also makes a few changes to SystemZInstrFormats.td which
  restrict a few condition code mnemonics to just the "att" dialect
  variant (he, le, lh, nhe, nle, nlh). These extended condition code
  mnemonics are not available in HLASM.
- A new private function has been introduced in SystemZAsmParser.cpp to
  return the assembler dialect set in SystemZMCAsmInfo.cpp. The reason we
  couldn't/haven't explicitly queried the overriden getAssemblerDialect
  function from AsmParser is outlined in this thread here. This returned
  dialect is directly passed onto the relevant matcher functions which taken
  in a variantID, so that the matcher functions can appropriately choose an
  instruction based on the variant.

Reviewed By: uweigand

Differential Revision: https://reviews.llvm.org/D94250