[Bug fortran/51260] PARAMETER array with constructor initializer: Compile-time simplify single element access

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51260

Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jvdelisle at gcc dot gnu.org

--- Comment #6 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
There is a similar problem going on with pr66709, only with a string:

program p
   character(4), parameter :: fmt(1) = '(i8)'
   integer :: n
   read (*, fmt=fmt) n
   write (*, fmt=fmt) n
end

The parameter expr gets into trans-io as an ARRAY_EXPR with rank 0.

I have tried gfc_simplify_expr and that does not do it.

If one removes the 'parameter' attribute this compiles and runs fine.  So
somewhere in the parameter processing we are missing something.