[all-commits] [llvm/llvm-project] c9b368: [mlir][spirv] Add a pass to unify aliased resource...

[Lei Zhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c9b36807beaf120f4e06d9da3b7df7625e440825
      https://github.com/llvm/llvm-project/commit/c9b36807beaf120f4e06d9da3b7df7625e440825
  Author: Lei Zhang <antiagainst at google.com>
  Date:   2022-02-17 (Thu, 17 Feb 2022)

  Changed paths:
    M mlir/include/mlir/Dialect/SPIRV/IR/SPIRVStructureOps.td
    M mlir/include/mlir/Dialect/SPIRV/Transforms/Passes.h
    M mlir/include/mlir/Dialect/SPIRV/Transforms/Passes.td
    M mlir/lib/Dialect/SPIRV/Transforms/CMakeLists.txt
    A mlir/lib/Dialect/SPIRV/Transforms/UnifyAliasedResourcePass.cpp
    A mlir/test/Dialect/SPIRV/Transforms/unify-aliased-resource.mlir

  Log Message:
  -----------
  [mlir][spirv] Add a pass to unify aliased resource variables

In SPIR-V, resources are represented as global variables that
are bound to certain descriptor. SPIR-V requires those global
variables to be declared as aliased if multiple ones are bound
to the same slot. Such aliased decorations can cause issues
for transcompilers like SPIRV-Cross when converting to source
shading languages like MSL.

So this commit adds a pass to perform analysis of aliased
resources and see if we can unify them into one.

Reviewed By: ThomasRaoux

Differential Revision: https://reviews.llvm.org/D119872