[Bug c/29313] New: [middle-end]Possible bogus warning: argument 'type' might be clobbered

["jvdelisle at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

This warning occurs for libgfortran/io/list_read.c (list_formatted_read_scalar)

It can be cleared up using the 'volatile' on the argument 'type' shown here. 
'type' is never changed anywhere.

static void
list_formatted_read_scalar (st_parameter_dt *dtp, volatile bt type, void *p,
int kind,
                            size_t size)
{
  char c;
  int m;
  jmp_buf eof_jump;

  dtp->u.p.namelist_mode = 0;

  dtp->u.p.eof_jump = &eof_jump;
  if (setjmp (eof_jump))
    {
      generate_error (&dtp->common, ERROR_END, NULL);
      goto cleanup;
    }

 --- snip ---


-- 
           Summary: [middle-end]Possible bogus warning: argument 'type'
                    might be clobbered
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jvdelisle at gcc dot gnu dot org
  GCC host triplet: linux-ppc, darwin-ppc, linux-x86-64


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29313