[all-commits] [llvm/llvm-project] 21db4c: [SystemZ][z/OS] Remove register prefixes when prin...

[Anirudh Prasad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 21db4cc2ea1518900b4a4c8235c4e1131fa0e613
      https://github.com/llvm/llvm-project/commit/21db4cc2ea1518900b4a4c8235c4e1131fa0e613
  Author: Anirudh Prasad <anirudh_prasad at hotmail.com>
  Date:   2021-04-27 (Tue, 27 Apr 2021)

  Changed paths:
    M llvm/lib/Target/SystemZ/MCTargetDesc/SystemZInstPrinter.cpp
    M llvm/lib/Target/SystemZ/MCTargetDesc/SystemZInstPrinter.h
    M llvm/lib/Target/SystemZ/SystemZAsmPrinter.cpp

  Log Message:
  -----------
  [SystemZ][z/OS] Remove register prefixes when printing out the register.

- This patch is the first part in enforcing prefix-less registers for the HLASM dialect in z/OS
- This patch removes the "%[r|f|v]" prefix while printing registers
- To achieve this, the `AssemblerDialect` field of MAI was used
- There is also a bit of refactoring done to ensure code repetition is reduced.
- Currently the LLVM assembler for SystemZ/z/OS accepts both prefixed registers and prefix-less registers. A subsequent follow-up patch will restrict the SystemZAsmParser to only accept prefix-less registers.

Crediting @kianm as an author as well.

Reviewed By: uweigand, abhina.sreeskantharajan

Differential Revision: https://reviews.llvm.org/D101308