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Re: proposal for compilation unil wide alias analyis

Dale Johannesen wrote:

For example the following program is illegal:

subroutine foo (a, b)
  integer a, b
  ! This invokes undefined behaviour if the same actual argument
  ! is passed for a and b
  a = 1
  print *, b
end subroutine


isn't it the case that the above is wrong even if there is no
reference to b. I know that at least in earlier versions of
Fortran, the error occurs at the point where you do an assignment
to a variable which has a visible alias.


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