[all-commits] [llvm/llvm-project] 0d4057: [flang] Inline hlfir.copy_in for trivial types (#1...

[Kajetan Puchalski via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d40574e16e8b192e0b3e4caa313b42cbfb88821
      https://github.com/llvm/llvm-project/commit/0d40574e16e8b192e0b3e4caa313b42cbfb88821
  Author: Kajetan Puchalski <kajetan.puchalski at arm.com>
  Date:   2025-06-06 (Fri, 06 Jun 2025)

  Changed paths:
    M flang/include/flang/Optimizer/Builder/HLFIRTools.h
    M flang/include/flang/Optimizer/HLFIR/Passes.td
    M flang/lib/Optimizer/Builder/HLFIRTools.cpp
    M flang/lib/Optimizer/HLFIR/Transforms/CMakeLists.txt
    A flang/lib/Optimizer/HLFIR/Transforms/InlineHLFIRCopyIn.cpp
    M flang/lib/Optimizer/Passes/Pipelines.cpp
    A flang/test/HLFIR/inline-hlfir-copy-in.fir

  Log Message:
  -----------
  [flang] Inline hlfir.copy_in for trivial types (#138718)

hlfir.copy_in implements copying non-contiguous array slices for
functions that take in arrays required to be contiguous through
flang-rt.

For large arrays of trivial types, this can incur overhead compared to a
plain, inlined copy loop.

To address that, add a new InlineHLFIRCopyIn optimisation pass to inline
hlfir.copy_in operations for trivial types.

For the time being, the pattern is only applied in cases where the
copy-in does not require a corresponding copy-out, such as when the
function being called declares the array parameter as intent(in).

Applying this optimisation reduces the runtime of thornado-mini's
DeleptonizationProblem by about 10%.

---------

Signed-off-by: Kajetan Puchalski <kajetan.puchalski at arm.com>



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