[Bug debug/14328] New: gcc3.2.2 generates incorrect debugging enum values

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

gcc3.2.2 generates negative values [-128 ... -1] as debugging symbols for enum
entries which have values in the range [128 ... 255]. Therefore attempts to 
view such entries under gdb returns bogus values. The following source file and 
gdb session demonstrate this problem. gcc-2.9.6 doesnt exhibit this behavour.


/* enum_err.c */
#include <stdio.h>
#include <stdlib.h>

typedef enum {
  ENTRY_126 = 126,ENTRY_127,ENTRY_128,ENTRY_129
} entries_t;

int 
main(int argc, char **argv)
{
  entries_t x,y;

  x = ENTRY_127;
  y = ENTRY_128;
  printf("hello world %d %d \n",((entries_t)x==ENTRY_127),(y==ENTRY_128));
  printf("more %x %x \n",ENTRY_127,ENTRY_128);
  return 0;
}

$ gcc -o enum_err enum_err.c -g -Wall
$ gdb enum_err


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This GDB was configured as "i386-redhat-linux"...
(gdb) ptype entries_t
type = enum {ENTRY_126 = 126, ENTRY_127, ENTRY_128 = -128, ENTRY_129}
(gdb) p/d ENTRY_127
$1 = 127
(gdb) p/d ENTRY_128
$2 = -128
(gdb) p/d ENTRY_129
$3 = -127
(gdb)

-- 
           Summary: gcc3.2.2 generates incorrect debugging enum values
           Product: gcc
           Version: 3.2.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tjruwase at stanfordalumni dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14328