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* [Bug debug/56740] New: duplicat DW_TAG_const_type
@ 2013-03-26 13:42 tromey at gcc dot gnu.org
2014-02-25 11:34 ` [Bug debug/56740] " mark at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: tromey at gcc dot gnu.org @ 2013-03-26 13:42 UTC (permalink / raw)
To: gcc-bugs
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: unassigned@gcc.gnu.org
ReportedBy: tromey@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>
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug debug/56740] duplicat DW_TAG_const_type
2013-03-26 13:42 [Bug debug/56740] New: duplicat DW_TAG_const_type tromey at gcc dot gnu.org
@ 2014-02-25 11:34 ` mark at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: mark at gcc dot gnu.org @ 2014-02-25 11:34 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56740
Mark Wielaard <mark at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mark at gcc dot gnu.org
--- Comment #1 from Mark Wielaard <mark at gcc dot gnu.org> ---
Replicated with gcc (GCC) 4.9.0 20140219 (experimental)
[ d7] array_type
type (ref4) [ d0]
[ ee] const_type
type (ref4) [ d7]
[ 124] const_type
type (ref4) [ d7]
DIE ee is referenced from:
[ 66] variable
name (string) "r"
decl_file (data1) 1
decl_line (data1) 17
type (ref4) [ ee]
location (exprloc) [ 0] fbreg -96
That is const char r[] = "ijk\0lmn"; in main ().
DIE 124 is referenced from:
[ 111] variable
name (string) "b"
decl_file (data1) 1
decl_line (data1) 2
type (ref4) [ 124]
location (exprloc) [ 0] addr 0x400644
<b>
That is the global static const char b[8] = "rstuv";
Do those 2 really represent the same type?
^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-03-26 13:42 [Bug debug/56740] New: duplicat DW_TAG_const_type tromey at gcc dot gnu.org
2014-02-25 11:34 ` [Bug debug/56740] " mark at gcc dot gnu.org
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