[all-commits] [llvm/llvm-project] 27afb3: [flang][OpenMP] Initial support the lowering of co...

[PeixinQiao via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 27afb362b1e85dac21744b95ed9b48f7e9fd016c
      https://github.com/llvm/llvm-project/commit/27afb362b1e85dac21744b95ed9b48f7e9fd016c
  Author: Peixin-Qiao <qiaopeixin at huawei.com>
  Date:   2022-06-24 (Fri, 24 Jun 2022)

  Changed paths:
    M flang/include/flang/Lower/AbstractConverter.h
    M flang/include/flang/Lower/SymbolMap.h
    M flang/lib/Lower/Bridge.cpp
    M flang/lib/Lower/OpenMP.cpp
    M flang/lib/Lower/SymbolMap.cpp
    M flang/lib/Semantics/resolve-directives.cpp
    A flang/test/Lower/OpenMP/copyin.f90

  Log Message:
  -----------
  [flang][OpenMP] Initial support the lowering of copyin clause

This supports the lowering of copyin clause initially. The pointer,
allocatable, common block, polymorphic varaibles will be supported
later.

This also includes the following changes:

1. Resolve the COPYIN clause and make the entity as host associated.

2. Fix collectSymbolSet by adding one option to control collecting the
   symbol itself or ultimate symbol of it so that it can be used
   explicitly differentiate the host and associated variables in
   host-association.

3. Add one helper function `lookupOneLevelUpSymbol` to differentiate the
   usage of host and associated variables explicitly. The previous
   lowering of firstprivate depends on the order of
   `createHostAssociateVarClone` and `lookupSymbol` of host symbol. With
   this fix, this dependence is removed.

4. Reuse `copyHostAssociateVar` for copying operation of COPYIN clause.

Reviewed By: kiranchandramohan, NimishMishra

Differential Revision: https://reviews.llvm.org/D127468