[DebugInfo][flang]Added support for representing Fortran assumed length strings
This patch adds support for representing Fortran character(n).
Primarily patch is based out of D54114 with appropriate modifications.
Test case IR is generated using our downstream classic-flang. We're in process
of upstreaming flang PR's but classic-flang has dependencies on llvm, so
this has to get in first.
Patch includes functional test case for both IR and corresponding
dwarf, furthermore it has been manually tested as well using GDB.
program assumedLength call sub('Hello') call sub('Goodbye') contains subroutine sub(string) implicit none character(len=*), intent(in) :: string print *, string end subroutine sub end program assumedLength
(gdb) ptype string type = character (5) (gdb) p string $1 = 'Hello'
Reviewed By: aprantl, schweitz
Differential Revision: https://reviews.llvm.org/D86305