http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52935
--- Comment #1 from Mark Wielaard <mark at gcc dot gnu.org> 2012-04-16 07:55:35
UTC ---
GNU C 4.6.3 20120306 (Red Hat 4.6.3-2) -mtune=generic -march=x86-64 -g
produces:
[ 1d] structure_type
name (string) "S"
byte_size (data1) 8
decl_file (data1) 1
decl_line (data1) 1
sibling (ref4) [ 32]
[ 27] member
name (string) "a"
decl_file (data1) 1
decl_line (data1) 1
type (ref4) [ 32]
data_member_location (data1) 0
[ 32] pointer_type
byte_size (data1) 8
type (ref4) [ 1d]
[ 38] structure_type
name (string) "T"
byte_size (data1) 8
decl_file (data1) 1
decl_line (data1) 1
sibling (ref4) [ 4d]
[ 42] member
name (string) "b"
decl_file (data1) 1
decl_line (data1) 1
type (ref4) [ 32]
data_member_location (data1) 0
[ 4d] variable
name (string) "t"
decl_file (data1) 1
decl_line (data1) 1
type (ref4) [ 38]
external (flag_present) Yes
location (exprloc)
[ 0] addr .bss+0
Both DIE 27 and 42 use the same type DIE 32.
While GNU C++ 4.6.3 20120306 (Red Hat 4.6.3-2) -mtune=generic -march=x86-64 -g
gives:
[ 1d] structure_type
name (string) "S"
byte_size (data1) 8
decl_file (data1) 1
decl_line (data1) 1
sibling (ref4) [ 32]
[ 27] member
name (string) "a"
decl_file (data1) 1
decl_line (data1) 1
type (ref4) [ 32]
data_member_location (data1) 0
[ 32] pointer_type
byte_size (data1) 8
type (ref4) [ 1d]
[ 38] structure_type
name (string) "T"
byte_size (data1) 8
decl_file (data1) 1
decl_line (data1) 1
sibling (ref4) [ 4d]
[ 42] member
name (string) "b"
decl_file (data1) 1
decl_line (data1) 1
type (ref4) [ 4d]
data_member_location (data1) 0
[ 4d] pointer_type
byte_size (data1) 8
type (ref4) [ 1d]
[ 53] variable
name (string) "t"
decl_file (data1) 1
decl_line (data1) 1
type (ref4) [ 38]
external (flag_present) Yes
location (exprloc)
[ 0] addr .bss+0 <t>
Type DIEs 32 and 4d are the same, the first is used by DIE 27, the second by
DIE 42.
