[all-commits] [llvm/llvm-project] 0f03b2: [mlir] Add redundant copy removal transform

[Ehsan Toosi via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 0f03b2bfda977a913036180584f636ecb4c8ef2a
      https://github.com/llvm/llvm-project/commit/0f03b2bfda977a913036180584f636ecb4c8ef2a
  Author: Ehsan Toosi <ehsan.nadjaran_toosi at dfki.de>
  Date:   2020-07-03 (Fri, 03 Jul 2020)

  Changed paths:
    M mlir/include/mlir/Dialect/Linalg/IR/LinalgOps.h
    M mlir/include/mlir/Dialect/Linalg/IR/LinalgStructuredOps.td
    M mlir/include/mlir/Interfaces/CMakeLists.txt
    A mlir/include/mlir/Interfaces/CopyOpInterface.h
    A mlir/include/mlir/Interfaces/CopyOpInterface.td
    M mlir/include/mlir/Transforms/Passes.h
    M mlir/include/mlir/Transforms/Passes.td
    M mlir/lib/Interfaces/CMakeLists.txt
    A mlir/lib/Interfaces/CopyOpInterface.cpp
    M mlir/lib/Transforms/CMakeLists.txt
    A mlir/lib/Transforms/CopyRemoval.cpp
    A mlir/test/Transforms/copy-removal.mlir

  Log Message:
  -----------
  [mlir] Add redundant copy removal transform

This pass removes redundant dialect-independent Copy operations in different
situations like the following:

%from = ...
%to = ...
... (no user/alias for %to)
copy(%from, %to)
... (no user/alias for %from)
dealloc %from
use(%to)

Differential Revision: https://reviews.llvm.org/D82757