[all-commits] [llvm/llvm-project] 66ec32: [flang] Fix lowering of optional char proc args

[Leandro Lupori via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 66ec32633207885abc717b271cfb7730674d380e
      https://github.com/llvm/llvm-project/commit/66ec32633207885abc717b271cfb7730674d380e
  Author: Leandro Lupori <leandro.lupori at linaro.org>
  Date:   2023-03-06 (Mon, 06 Mar 2023)

  Changed paths:
    M flang/include/flang/Optimizer/Builder/FIRBuilder.h
    M flang/lib/Lower/ConvertCall.cpp
    M flang/lib/Lower/ConvertExpr.cpp
    M flang/lib/Optimizer/Builder/FIRBuilder.cpp
    A flang/test/Lower/HLFIR/dummy-argument-optional.f90
    M flang/test/Lower/dummy-argument-optional.f90

  Log Message:
  -----------
  [flang] Fix lowering of optional char proc args

Optional character function arguments were not being lowered
properly. As they are passed as a tuple, containing the (boxed)
function address and the character length, it is not possible for
fir.absent to handle it directly. Instead, a tuple needs to be
created and filled with an absent function address and a dummy
character length.

Fixes #60225

Reviewed By: jeanPerier

Differential Revision: https://reviews.llvm.org/D144743