[flang][debug] Incorrect type for subroutines

[abidh]

It seems that flang generates the wrong debug information for type of subroutine. If subroutine has an argument then that is taken as return type. The following example describes the issue:

subroutine sub (r)
  real r
  print *, r
end subroutine

program main
  call sub(3.14)
end program main

This is what GDB shows for the type of the sub. Notice the return type of real.

(gdb) whatis sub
type = real (real)

While it should have been

(gdb) whatis sub
type = void (real)

[llvmbot]

@llvm/issue-subscribers-debuginfo

Author: Abid Qadeer (abidh)

It seems that flang generates the wrong debug information for type of subroutine. If subroutine has an argument then that is taken as return type. The following example describes the issue:

subroutine sub (r)
  real r
  print *, r
end subroutine

program main
  call sub(3.14)
end program main

This is what GDB shows for the type of the sub. Notice the return type of real.

(gdb) whatis sub
type = real (real)

While it should have been

(gdb) whatis sub
type = void (real)

[llvmbot]

@llvm/issue-subscribers-flang-ir

Author: Abid Qadeer (abidh)

It seems that flang generates the wrong debug information for type of subroutine. If subroutine has an argument then that is taken as return type. The following example describes the issue:

subroutine sub (r)
  real r
  print *, r
end subroutine

program main
  call sub(3.14)
end program main

This is what GDB shows for the type of the sub. Notice the return type of real.

(gdb) whatis sub
type = real (real)

While it should have been

(gdb) whatis sub
type = void (real)