[all-commits] [llvm/llvm-project] 2e53a6: [flang][runtime] Speed up initialization & destruc...

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2e53a68c09b1bb4bc6c31146c8e69789ae9848ae
      https://github.com/llvm/llvm-project/commit/2e53a68c09b1bb4bc6c31146c8e69789ae9848ae
  Author: Peter Klausler <pklausler at nvidia.com>
  Date:   2025-07-14 (Mon, 14 Jul 2025)

  Changed paths:
    M flang-rt/include/flang-rt/runtime/descriptor.h
    M flang-rt/include/flang-rt/runtime/type-info.h
    M flang-rt/include/flang-rt/runtime/work-queue.h
    M flang-rt/lib/runtime/assign.cpp
    M flang-rt/lib/runtime/derived.cpp
    M flang-rt/lib/runtime/descriptor.cpp
    M flang-rt/lib/runtime/pointer.cpp
    M flang-rt/lib/runtime/work-queue.cpp

  Log Message:
  -----------
  [flang][runtime] Speed up initialization & destruction (#148087)

Rework derived type initialization in the runtime to just initialize the
first element of any array, and then memcpy it to the others, rather
than exercising the per-component paths for each element.

Reword derived type destruction in the runtime to detect and exploit a
fast path for allocatable components whose types themselves don't need
nested destruction.

Small tweaks were made in hot paths exposed by profiling in descriptor
operations and derived type assignment.



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