[Flang] Compile error when argument keyword is specified in argument of c_sizeof intrinsic module function

[ohno-fj]

Version of flang : 21.0.0(b2b3cb5f76f15d38e67f70124d275a5696bfdb83)/AArch64

When argument keyword is specified in argument (actual argument specifier) of c_sizeof intrinsic module function, a compilation error occurs.
Although the types of intrinsic module functions are different, this issue is similar to [128610] (#128610).

The following are the test program, Flang, Gfortran and ifx compilation/execution result.

sngtm016_2.f90:

program main
  use iso_c_binding
  real(c_float) :: r
  real(c_float),pointer ::p
  type(c_ptr) :: leftptr
  print *,c_sizeof(r)
  print *,c_sizeof(x=r)
  leftptr=c_loc(x=p)
end program main

$ flang sngtm016_2.f90
error: Semantic errors in sngtm016_2.f90
./sngtm016_2.f90:7:20: error: unknown keyword argument to intrinsic 'sizeof'
    print *,c_sizeof(x=r)
                     ^
$

$ gfortran sngtm016_2.f90; ./a.out
                    4
                    4
$

$ ifx sngtm016_2.f90; ./a.out
                     4
                     4
$

[llvmbot]

@llvm/issue-subscribers-flang-frontend

Author: None (ohno-fj)

``` Version of flang : 21.0.0(b2b3cb5)/AArch64 ```

When argument keyword is specified in argument (actual argument specifier) of c_sizeof intrinsic module function, a compilation error occurs.
Although the types of intrinsic module functions are different, this issue is similar to [128610] (#128610).

The following are the test program, Flang, Gfortran and ifx compilation/execution result.

sngtm016_2.f90:

program main
  use iso_c_binding
  real(c_float) :: r
  real(c_float),pointer ::p
  type(c_ptr) :: leftptr
  print *,c_sizeof(r)
  print *,c_sizeof(x=r)
  leftptr=c_loc(x=p)
end program main

$ flang sngtm016_2.f90
error: Semantic errors in sngtm016_2.f90
./sngtm016_2.f90:7:20: error: unknown keyword argument to intrinsic 'sizeof'
    print *,c_sizeof(x=r)
                     ^
$

$ gfortran sngtm016_2.f90; ./a.out
                    4
                    4
$

$ ifx sngtm016_2.f90; ./a.out
                     4
                     4
$

[klausler]

Duplicates #128610, already fixed.