[PATCH] D43553: TableGen: Add !size operation

[Nicolai Hähnle via Phabricator via llvm-commits]

nhaehnle created this revision.
nhaehnle added reviewers: arsenm, craig.topper, tra, MartinO.
Herald added subscribers: tpr, wdng.

Returns the size of a list. I have found this to be rather useful in some
development for the AMDGPU backend where we could simplify our .td files
by concatenating list<LLVMType> for complex intrinsics. Doing so requires
us to compute the position argument for LLVMMatchType.

Basically, the usage is in a pattern that looks somewhat like this:

  list<LLVMType> argtypes =
      !listconcat(base,
                  [llvm_any_ty, LLVMMatchType<!size(base)>]);

Change-Id: I360a0b000fd488d18bea412228230fd93722bd2c


Repository:
  rL LLVM

https://reviews.llvm.org/D43553

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

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