[PATCH] D137361: IR: Add atomicrmw inc and dec

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: tianshilei1992, jdoerfert, tra, hfinkel, jfb, reames.
Herald added subscribers: kosarev, ormris, kerbowa, steven_wu, hiraditya, tpr, jvesely.
Herald added a project: All.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.

These are essentially add/sub 1 with a clamping value.

      

AMDGPU has instructions for these. CUDA/HIP expose these as
atomicInc/atomicDec. Currently we use target intrinsics for these,
but those do no carry the ordering and syncscope. Add these to
atomicrmw so we can carry these and benefit from the regular
legalization processes.


https://reviews.llvm.org/D137361

Files:
  llvm/docs/LangRef.rst
  llvm/docs/ReleaseNotes.rst
  llvm/include/llvm/AsmParser/LLToken.h
  llvm/include/llvm/Bitcode/LLVMBitCodes.h
  llvm/include/llvm/CodeGen/ISDOpcodes.h
  llvm/include/llvm/CodeGen/SelectionDAGNodes.h
  llvm/include/llvm/IR/Instructions.h
  llvm/include/llvm/Support/TargetOpcodes.def
  llvm/include/llvm/Target/GenericOpcodes.td
  llvm/include/llvm/Target/GlobalISel/SelectionDAGCompat.td
  llvm/include/llvm/Target/TargetSelectionDAG.td
  llvm/lib/AsmParser/LLLexer.cpp
  llvm/lib/AsmParser/LLParser.cpp
  llvm/lib/Bitcode/Reader/BitcodeReader.cpp
  llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
  llvm/lib/CodeGen/AtomicExpandPass.cpp
  llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
  llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp
  llvm/lib/IR/Instructions.cpp
  llvm/lib/Transforms/Utils/LowerAtomic.cpp
  llvm/test/Assembler/atomic.ll
  llvm/test/Bitcode/compatibility.ll
  llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
  llvm/test/CodeGen/AMDGPU/private-memory-atomics.ll
  llvm/test/Transforms/AtomicExpand/AMDGPU/expand-atomic-i16.ll
  llvm/test/Transforms/AtomicExpand/AMDGPU/expand-atomic-i8.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D137361.473045.patch
Type: text/x-patch
Size: 85176 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20221103/1670f16f/attachment.bin>