[all-commits] [llvm/llvm-project] 7a46d3: [SystemZ][z/OS] Add support to validate a HLASM La...

[Kai Nacke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7a46d34a1953625f03b71494c0f33fe00316e4ba
      https://github.com/llvm/llvm-project/commit/7a46d34a1953625f03b71494c0f33fe00316e4ba
  Author: Anirudh Prasad <Anirudh.Prasad at ibm.com>
  Date:   2021-03-08 (Mon, 08 Mar 2021)

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

  Log Message:
  -----------
  [SystemZ][z/OS] Add support to validate a HLASM Label.

- This patch adds in support to determine whether a particular label
  is valid for the hlasm variant
- The label syntax being checked is that of an ordinary HLASM symbol
  (Reference, Chapter 2 (Coding and Structure) - Terms, Literals and
  Expressions - Terms - Symbols - Ordinary Symbol)
- To achieve this, the virtual function isLabel defined in
  MCTargetAsmParser.h is made use of
- The isLabel function is overridden in SystemZAsmParser for the
  hlasm variant, and the syntax is checked appropriately
- Things remain unchanged for the att variant
- Further patches will add in support to emit the label. These future
  patches will make use of this isLabel function

Reviewed By: uweigand, Kai

Differential Revision: https://reviews.llvm.org/D97748