[all-commits] [llvm/llvm-project] 0dd4fb: [flang] Fix for broken/degenerate forall case

[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: 0dd4fb0408ed980de2c100905e68a4adf9987c61
      https://github.com/llvm/llvm-project/commit/0dd4fb0408ed980de2c100905e68a4adf9987c61
  Author: Valentin Clement <clementval at gmail.com>
  Date:   2022-07-01 (Fri, 01 Jul 2022)

  Changed paths:
    M flang/lib/Lower/Bridge.cpp
    M flang/lib/Lower/ConvertExpr.cpp

  Log Message:
  -----------
  [flang] Fix for broken/degenerate forall case

Fix for broken/degenerate forall case where there is no assignment to an
array under the explicit iteration space. While this is a multiple
assignment, semantics only raises a warning.
The fix is to add a test that the explicit space has any sort of array
to be updated, and if not then the do_loop nest will not require a
terminator to forward array values to the next iteration.

This patch is part of the upstreaming effort from fir-dev branch.

Reviewed By: jeanPerier

Differential Revision: https://reviews.llvm.org/D128973

Co-authored-by: Eric Schweitz <eschweitz at nvidia.com>