[all-commits] [llvm/llvm-project] ded0a7: [AsmParser][SystemZ][z/OS] Reject "Dot" as current...

[Anirudh Prasad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ded0a70aeb08919922cdba5f4fcc7d7646e2ffe2
      https://github.com/llvm/llvm-project/commit/ded0a70aeb08919922cdba5f4fcc7d7646e2ffe2
  Author: Anirudh Prasad <anirudh_prasad at hotmail.com>
  Date:   2021-04-29 (Thu, 29 Apr 2021)

  Changed paths:
    M llvm/include/llvm/MC/MCAsmInfo.h
    M llvm/lib/MC/MCParser/AsmParser.cpp
    M llvm/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmInfo.cpp
    M llvm/unittests/MC/SystemZ/SystemZAsmLexerTest.cpp

  Log Message:
  -----------
  [AsmParser][SystemZ][z/OS] Reject "Dot" as current PC on z/OS

- Currently, the "." (Dot) character, when not identifying an Identifier or a Constant, refers to the current PC (Program Counter)
- However, in z/OS, for the HLASM dialect, it strictly accepts only the "*" as the current PC (Support for this will be put up in a follow-up patch)
- The changes in this patch allow individual platforms to choose whether they would like to use the "." (Dot) character as a marker for the current PC or not.
- It is achieved by introducing a new field in MCAsmInfo.h called `DotIsPC` (similar to `DollarIsPC`)

Reviewed By: abhina.sreeskantharajan

Differential Revision: https://reviews.llvm.org/D100975