[Bug debug/56740] New: duplicat DW_TAG_const_type

[tromey at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56740



             Bug #: 56740

           Summary: duplicat DW_TAG_const_type

    Classification: Unclassified

           Product: gcc

           Version: unknown

            Status: UNCONFIRMED

          Severity: normal

          Priority: P3

         Component: debug

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: tro...@gcc.gnu.org





I used this source, from PR 55608:



static const char *a = "opq";

static const char b[8] = "rstuv";

static const char *c = b;

static const char *d = b + 3;

static const int e[] = { 1, 2, 3, 4 };

static int f[] = { 5, 6, 7 };

static const int *g = e;

static const int *h = e + 2;

static const int *i = f;

static const int *j = f + 2;



int

main ()

{

  const char *p = "abcd";

  const char *q = "efgh";

  const char r[] = "ijk\0lmn";

  const char *s = r;

  const char *t = b;

  const int *u = e;

  const int *v = e + 2;

  const int *w = f;

  const int *x = f + 2;

  return 0;

}





I compiled this with "gcc -g -O2", using git master gcc from

yesterday.



The DWARF contains some needless duplication:



 <1><fd>: Abbrev Number: 7 (DW_TAG_const_type)

    <fe>   DW_AT_type        : <0xe6>    



 <1><12f>: Abbrev Number: 7 (DW_TAG_const_type)

    <130>   DW_AT_type        : <0xe6>