[all-commits] [llvm/llvm-project] 4e6745: [flang][cuda] Lower simple host to device data tra...

[Valentin Clement (バレンタイン クレメン) via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4e6745cc4db309c0e1b5e41d4598f67763f4c096
      https://github.com/llvm/llvm-project/commit/4e6745cc4db309c0e1b5e41d4598f67763f4c096
  Author: Valentin Clement (バレンタイン クレメン) <clementval at gmail.com>
  Date:   2024-03-25 (Mon, 25 Mar 2024)

  Changed paths:
    M flang/include/flang/Optimizer/Dialect/FIRAttr.td
    M flang/include/flang/Optimizer/Dialect/FIROps.td
    M flang/lib/Lower/Bridge.cpp
    M flang/lib/Optimizer/Dialect/FIRAttr.cpp
    A flang/test/Lower/CUDA/cuda-data-transfer.cuf

  Log Message:
  -----------
  [flang][cuda] Lower simple host to device data transfer (#85960)

In CUDA Fortran data transfer can be done via assignment statements
between host and device variables.

This patch introduces a `fir.cuda_data_transfer` operation that
materialized the data transfer between two memory references.

Simple transfer not involving descriptors from host to device are also
lowered in this patch. When the rhs is an expression that required an
evaluation, a temporary is created. The evaluation is done on the host
and then the transfer is initiated.

Implicit transfer when device symbol are present on the rhs is not part
of this patch. Transfer from device to host is not part of this patch.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications