[all-commits] [llvm/llvm-project] 8adcc8: [SelectionDAG] Introduce ISD::PTRADD (#140017)

[Fabian Ritter via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8adcc8a669f093d6fe74645900515e4561102248
      https://github.com/llvm/llvm-project/commit/8adcc8a669f093d6fe74645900515e4561102248
  Author: Fabian Ritter <fabian.ritter at amd.com>
  Date:   2025-05-28 (Wed, 28 May 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/ISDOpcodes.h
    M llvm/include/llvm/CodeGen/SelectionDAGNodes.h
    M llvm/include/llvm/CodeGen/TargetLowering.h
    M llvm/include/llvm/Target/TargetSelectionDAG.td
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp

  Log Message:
  -----------
  [SelectionDAG] Introduce ISD::PTRADD (#140017)

This opcode represents the addition of a pointer value (first operand)
and an integer offset (second operand). PTRADD nodes are only generated
if the TargetMachine opts in by overriding
TargetMachine::shouldPreservePtrArith().

The PTRADD node and respective visitPTRADD() function were adapted by
@rgwott from the CHERI/Morello LLVM tree.
Original authors: @davidchisnall, @jrtc27, @arichardson.

The changes in this PR were extracted from PR #105669.

---------

Co-authored-by: David Chisnall <github at theravensnest.org>
Co-authored-by: Jessica Clarke <jrtc27 at jrtc27.com>
Co-authored-by: Alexander Richardson <alexrichardson at google.com>
Co-authored-by: Rodolfo Wottrich <rodolfo.wottrich at arm.com>



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