[Bug fortran/19334] ISHFT has the wrong type for constant values

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

------- Additional Comments From tobi at gcc dot gnu dot org  2005-01-09 12:29 -------
Hm,

I've instrumented the tree-dumper to print the widths and signednesses of
integer constants, i.e.
Index: tree-pretty-print.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/tree-pretty-print.c,v
retrieving revision 2.52
diff -u -p -r2.52 tree-pretty-print.c
--- tree-pretty-print.c 9 Dec 2004 10:54:36 -0000       2.52
+++ tree-pretty-print.c 9 Jan 2005 12:20:44 -0000
@@ -532,6 +532,18 @@ dump_generic_node (pretty_printer *buffe
        }
       else
        pp_wide_integer (buffer, TREE_INT_CST_LOW (node));
+
+      if (tree_int_cst_sgn (TYPE_MIN_VALUE (TREE_TYPE (node))) < 0)
+       {
+         /* signed type.  */
+         pp_string (buffer, "_S");
+       }
+      else
+       {
+         /* unsigned type.  */
+         pp_string (buffer, "_U");
+       }
+      pp_wide_integer (buffer, TYPE_PRECISION (TREE_TYPE (node)));
       break;

     case REAL_CST:

now for gfortran both with and without my patch I get:
[tobi@marktplatz tests]$ cat pr19334.f90.t02.original
MAIN__ ()
{
  int1 k;

  {
    int1 C.454 = 0_S8;

    c_i1 (&C.454);
  }
}


c_i1 (i)
{
  (void) 0_U32;


which looks correct.  The same goes for the optimized dump:
[tobi@marktplatz tests]$ cat pr19334.f90.t63.optimized

;; Function MAIN__ (MAIN__)

Analyzing Edge Insertions.
MAIN__ ()
{
  int1 C.454 = 0_S8;
  int1 k;

<bb 0>:
  c_i1 (&C.454);
  return;

}



;; Function c_i1 (c_i1__)

Analyzing Edge Insertions.
c_i1 (i)
{
<bb 0>:
  return;

}


Maybe this is an optimizer issue? Or is there something else I should be looking
for?

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19334