[PATCH] D90107: [TableGen] [AMDGPU] Add !sub bang operator for subtraction

[Paul C. Anagnostopoulos via Phabricator via llvm-commits]

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In my travels through TableGen and the backends, I came across:

  foreach Index = Indexes<!add(33, !mul(Size, -1))>.slice in {

To clean this up, I changed it to:

  foreach Index = Indexes<!sub(33, Size)>.slice in {

Only then did I finally realize that there is no subtraction bang operator. So there is now.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90107

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/lib/Target/AMDGPU/SIRegisterInfo.td
  llvm/test/TableGen/arithmetic.td
  llvm/test/TableGen/math.td

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