[Bug fortran/57800] New: Waste work in gfc_match_call()

[pchang9 at cs dot wisc.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57800

            Bug ID: 57800
           Summary: Waste work in gfc_match_call()
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pchang9 at cs dot wisc.edu
                CC: nistor1 at illinois dot edu

The problem appears in revision 200588 in version 4.9.

In method "gfc_match_call()" in gcc/fortran/match.c, the loop on line 4189
should break immediately after "i" is set to 1. All the iterations after "i"
set to 1 do not perform any useful work, at best they just set "i" again to 1.