[all-commits] [llvm/llvm-project] 857ac4: [MLIR][OpenMP] Lowering nontemporal clause to LLVM...

[Kaviya Rajendiran via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 857ac4c229d209ebf3990c4760e2fc546beeac9c
      https://github.com/llvm/llvm-project/commit/857ac4c229d209ebf3990c4760e2fc546beeac9c
  Author: Kaviya Rajendiran <67495422+kaviya2510 at users.noreply.github.com>
  Date:   2025-04-30 (Wed, 30 Apr 2025)

  Changed paths:
    M flang/include/flang/Optimizer/Dialect/FIROps.td
    M flang/include/flang/Optimizer/OpenMP/Passes.td
    M flang/lib/Optimizer/CodeGen/CodeGen.cpp
    M flang/lib/Optimizer/OpenMP/CMakeLists.txt
    A flang/lib/Optimizer/OpenMP/LowerNontemporal.cpp
    M flang/lib/Optimizer/Passes/Pipelines.cpp
    M flang/test/Fir/basic-program.fir
    A flang/test/Fir/convert-nontemporal-to-llvm.fir
    A flang/test/Fir/simd-nontemporal.fir
    M mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
    A mlir/test/Target/LLVMIR/openmp-nontemporal.mlir
    M mlir/test/Target/LLVMIR/openmp-todo.mlir

  Log Message:
  -----------
  [MLIR][OpenMP] Lowering nontemporal clause to LLVM IR for SIMD directive (#118751)

This patch,
- Added a new attribute `nontemporal` to fir.load and fir.store operation in the FIR dialect.
- Added a pass `lower-nontemporal` which is called before FIRToLLVM conversion pass and adds the nontemporal attribute to loads and stores on the list items specified in the nontemporal clause of the SIMD directive.
- Set the `UnitAttr:$nontemporal` to llvm.load and llvm.store operations during FIR to LLVM dialect conversion, if the corresponding fir.load or fir.store operations have the nontemporal attribute.
- Attached the `nontemporal metadata` to load and store instructions that have the nontemporal attribute, during LLVM dialect to LLVM IR translation.



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