[flang-commits] [clang] [flang] [Flang][OpenMP] Flag for switching off implicit allocatable member mapping via default declare mapper (PR #228748)

[Tarun Prabhu via flang-commits]

================
@@ -386,6 +386,8 @@ void Flang::addCodegenOptions(const ArgList &Args,
        options::OPT_fstack_repack_arrays, options::OPT_fno_stack_repack_arrays,
        options::OPT_ftime_report, options::OPT_ftime_report_EQ,
        options::OPT_funroll_loops, options::OPT_fno_unroll_loops,
+       options::OPT_fimplicit_default_mapper_allocatable_members,
+       options::OPT_fno_implicit_default_mapper_allocatable_members,
----------------
tarunprabhu wrote:

Instead of passing these unconditionally, I would suggest only passing the "winner" to `-fc1`. This will be the last occurrence of `-f(no)-implicit-default-mapper-allocatable-members`. This could be done by adding the following to `addOffloadOptions`. 

```
if (!Args.hasFlag(options::OPT_fimplicit_default_mapper_allocatable_members,
                   options::OPT_fno_implicit_default_mapper_allocatable_members,
                   /*Default=*/true))
    CmdArgs.push_back("-fno-implicit-default-mapper-allocatable-members");
```

https://github.com/llvm/llvm-project/pull/228748