[PATCH] D74401: [MLIR] Add std.atomic_rmw op

[Frank Laub via Phabricator via llvm-commits]

flaub created this revision.
flaub added reviewers: ftynse, mehdi_amini, rriddle, jbruestle, earhart.
Herald added subscribers: llvm-commits, Joonsoo, liufengdb, lucyrfox, mgester, arpith-jacob, nicolasvasilache, antiagainst, shauheen, burmako, jpienaar, jfb.
Herald added a project: LLVM.
flaub updated this revision to Diff 243841.
flaub added a comment.

- Remove stdx.


The RFC for this op is here: https://llvm.discourse.group/t/rfc-add-std-atomic-rmw-op/489

The std.atmomic_rmw op provides a way to support read-modify-write
sequences with data race freedom. It is intended to be used in the lowering
of an upcoming affine.atomic_rmw op which can be used for reductions.

A lowering to LLVM is provided with 2 paths:

- Simple patterns: llvm.atomicrmw
- Everything else: llvm.cmpxchg


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D74401

Files:
  mlir/include/mlir/Dialect/StandardOps/Ops.td
  mlir/lib/Conversion/StandardToLLVM/ConvertStandardToLLVM.cpp
  mlir/lib/Dialect/StandardOps/Ops.cpp
  mlir/test/Conversion/StandardToLLVM/convert-to-llvmir.mlir
  mlir/test/IR/core-ops.mlir
  mlir/test/IR/invalid-ops.mlir

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