[PATCH] D139642: [TableGen] Add a !listremove() bang operator

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: Paul-C-Anagnostopoulos, craig.topper, barannikov88, andreadb.
Herald added subscribers: StephenFan, hiraditya.
Herald added a project: All.
RKSimon requested review of this revision.
Herald added a project: LLVM.

This patch proposes to add a !listremove() bang operator to allow us to prune list entries by removing any entries from the first list arg that are also contained in the second list arg.

The particular use case I have in mind is for improved analysis of x86 scheduler models for which I'm hoping to start using the CodeGenProcModel 'Unsupported' features lists, which lists the ISA features a particular model DOESN'T support - with such a diverse and growing list of x86 ISAs, I don't want to have to update all these lists with every ISA change to every model - so I'm intending to keep a single central list of all x86 features, and then have the each model "remove" the features that it supports via a !listremove() - leaving just the unsupported ones.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139642

Files:
  llvm/docs/TableGen/ProgRef.rst
  llvm/include/llvm/TableGen/Record.h
  llvm/lib/TableGen/Record.cpp
  llvm/lib/TableGen/TGLexer.cpp
  llvm/lib/TableGen/TGLexer.h
  llvm/lib/TableGen/TGParser.cpp
  llvm/test/TableGen/listremove.td

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