[all-commits] [llvm/llvm-project] 6d617b: [Flang] add support for collapsed io calls for imp...

[Jason Van Beusekom via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6d617b831f5b9f354753106f6ffe5fc482209756
      https://github.com/llvm/llvm-project/commit/6d617b831f5b9f354753106f6ffe5fc482209756
  Author: Jason Van Beusekom <jason.van-beusekom at hpe.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

  Changed paths:
    M flang/lib/Lower/IO.cpp
    A flang/test/Lower/io-implied-do-collapse.f90

  Log Message:
  -----------
  [Flang] add support for collapsed io calls for implicit do loops (#212646)

This is a extension of the work done in #163945 by addind support for IO
lowering to recognize a contiguous single-level io-implied-do in an
unformatted transfer with no condition specifiers, and collapse it into
a single array-section descriptor call instead of emitting a per-element
fir.do_loop.

see RFC:
https://discourse.llvm.org/t/rfc-add-support-for-collapsed-io-calls-for-implicit-do-loops/91416/2


Assisted-by: Opus 4.8



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