[all-commits] [llvm/llvm-project] e66ea4: [flang][cuda] Improve data transfer detection by f...

[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: e66ea43a399a1d70cbe3e4ed6adc77b2570cc51f
      https://github.com/llvm/llvm-project/commit/e66ea43a399a1d70cbe3e4ed6adc77b2570cc51f
  Author: Valentin Clement (バレンタイン クレメン) <clementval at gmail.com>
  Date:   2024-07-11 (Thu, 11 Jul 2024)

  Changed paths:
    M flang/include/flang/Evaluate/tools.h
    M flang/lib/Evaluate/tools.cpp
    M flang/test/Lower/CUDA/cuda-data-transfer.cuf

  Log Message:
  -----------
  [flang][cuda] Improve data transfer detection by filtering symbols (#98378)

The current data transfer detection was collecting too many symbol and
made wrong decision. This patch introduces a new function
`CollectCudaSymbols` that is different than `CollectSymbols` and collect
only symbol of interest for cuda data transfer in an expression.

Currently two cases where symbols are filtered out are: 
- array subscripts: only the array symbol is on interest, the indexing
can be filtered out
- function arguments: symbols of the function arguments are filtered
out.

This fix some false positive data transfer and implicit data transfer. 

More filtering might be needed and will be added as follow up patches.



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