[flang-commits] [flang] [flang][openmp]Add UserReductionDetails and use in DECLARE REDUCTION (PR #131628)

[Kiran Chandramohan via flang-commits]

kiranchandramohan wrote:

There is a case for UserReductionDetails that has to be added while writing a module file. The following test crashes in that code.
```
module decl_red1
  type t1
    integer :: val
  end type t1
  interface operator(*)
    module procedure mul
  end interface
!$omp declare reduction(*:t1:omp_out=omp_out*omp_in) initializer(omp_priv=t1(1))
contains
  type(t1) function mul(v1, v2)
    type(t1), intent (in):: v1, v2
    mul%val = v1%val * v2%val
  end function
end module
```

https://github.com/llvm/llvm-project/pull/131628