[all-commits] [llvm/llvm-project] a4830d: [mlir][RFC] Add scalable dimensions to VectorType

[jsetoain via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4830d14edbb2a21eb35f3d79d1f64bd09db8b1c
      https://github.com/llvm/llvm-project/commit/a4830d14edbb2a21eb35f3d79d1f64bd09db8b1c
  Author: Javier Setoain <javier.setoain at gmail.com>
  Date:   2021-12-15 (Wed, 15 Dec 2021)

  Changed paths:
    M mlir/include/mlir/Dialect/ArmSVE/ArmSVE.td
    M mlir/include/mlir/Dialect/ArmSVE/ArmSVEDialect.h
    R mlir/include/mlir/Dialect/ArmSVE/ArmSVEOpBase.td
    M mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
    M mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h
    M mlir/include/mlir/Dialect/Vector/VectorOps.td
    M mlir/include/mlir/IR/BuiltinTypes.h
    M mlir/include/mlir/IR/BuiltinTypes.td
    M mlir/include/mlir/IR/OpBase.td
    M mlir/lib/Conversion/LLVMCommon/TypeConverter.cpp
    M mlir/lib/Conversion/VectorToLLVM/ConvertVectorToLLVM.cpp
    M mlir/lib/Dialect/Arithmetic/IR/ArithmeticOps.cpp
    M mlir/lib/Dialect/ArmSVE/IR/ArmSVEDialect.cpp
    M mlir/lib/Dialect/ArmSVE/Transforms/LegalizeForLLVMExport.cpp
    M mlir/lib/Dialect/LLVMIR/IR/LLVMDialect.cpp
    M mlir/lib/Dialect/LLVMIR/IR/LLVMTypes.cpp
    M mlir/lib/Dialect/StandardOps/IR/Ops.cpp
    M mlir/lib/IR/AsmPrinter.cpp
    M mlir/lib/IR/BuiltinAttributes.cpp
    M mlir/lib/IR/BuiltinTypes.cpp
    M mlir/lib/Parser/Parser.h
    M mlir/lib/Parser/TypeParser.cpp
    M mlir/lib/Target/LLVMIR/ModuleTranslation.cpp
    M mlir/lib/Target/LLVMIR/TypeToLLVM.cpp
    M mlir/test/Dialect/Arithmetic/ops.mlir
    M mlir/test/Dialect/ArmSVE/legalize-for-llvm.mlir
    R mlir/test/Dialect/ArmSVE/memcpy.mlir
    M mlir/test/Dialect/ArmSVE/roundtrip.mlir
    M mlir/test/Dialect/Builtin/invalid.mlir
    M mlir/test/Dialect/Builtin/ops.mlir
    M mlir/test/Dialect/Vector/ops.mlir
    A mlir/test/Dialect/Vector/vector-scalable-memcpy.mlir
    M mlir/test/Target/LLVMIR/arm-sve.mlir

  Log Message:
  -----------
  [mlir][RFC] Add scalable dimensions to VectorType

With VectorType supporting scalable dimensions, we don't need many of
the operations currently present in ArmSVE, like mask generation and
basic arithmetic instructions. Therefore, this patch also gets
rid of those.

Having built-in scalable vector support also simplifies the lowering of
scalable vector dialects down to LLVMIR.

Scalable dimensions are indicated with the scalable dimensions
between square brackets:

        vector<[4]xf32>

Is a scalable vector of 4 single precission floating point elements.

More generally, a VectorType can have a set of fixed-length dimensions
followed by a set of scalable dimensions:

        vector<2x[4x4]xf32>

Is a vector with 2 scalable 4x4 vectors of single precission floating
point elements.

The scale of the scalable dimensions can be obtained with the Vector
operation:

        %vs = vector.vscale

This change is being discussed in the discourse RFC:

https://llvm.discourse.group/t/rfc-add-built-in-support-for-scalable-vector-types/4484

Differential Revision: https://reviews.llvm.org/D111819