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re PR debug/53235 (20120504 broke -fdebug-types-section)

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PR debug/53235
	* dwarf2out.c (build_local_stub): Prefer DW_AT_signature for
	comdat types.

From-SVN: r187435
This commit is contained in:
Jason Merrill 2012-05-12 23:37:38 -04:00 committed by Jason Merrill
parent e08946f4ac
commit bf4c7d4a02
2 changed files with 24 additions and 23 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-05-12 Jason Merrill <jason@redhat.com>
PR debug/53235
* dwarf2out.c (build_local_stub): Prefer DW_AT_signature for
comdat types.
2012-05-12 Eric Botcazou <ebotcazou@adacore.com>
* function.c (requires_stack_frame_p): If the function can throw

41
gcc/dwarf2out.c
View File

@ -6929,36 +6929,31 @@ static int
build_local_stub (void **slot, void *data)
{
struct external_ref *ref_p = (struct external_ref *)*slot;
dw_die_ref cu = (dw_die_ref) data;
dw_die_ref type = ref_p->type;
dw_die_ref stub = NULL;
if (ref_p->stub == NULL && ref_p->n_refs > 1)
if (ref_p->stub == NULL && ref_p->n_refs > 1 && !dwarf_strict)
{
if (!dwarf_strict)
/* We have multiple references to this type, so build a small stub.
Both of these forms are a bit dodgy from the perspective of the
DWARF standard, since technically they should have names. */
dw_die_ref cu = (dw_die_ref) data;
dw_die_ref type = ref_p->type;
dw_die_ref stub = NULL;
if (type->comdat_type_p)
{
/* If we aren't being strict, use a typedef with no name
to just forward to the real type. In strict DWARF, a
typedef must have a name. */
/* If we refer to this type via sig8, use AT_signature. */
stub = new_die (type->die_tag, cu, NULL_TREE);
add_AT_die_ref (stub, DW_AT_signature, type);
}
else
{
/* Otherwise, use a typedef with no name. */
stub = new_die (DW_TAG_typedef, cu, NULL_TREE);
add_AT_die_ref (stub, DW_AT_type, type);
}
else if (type->comdat_type_p)
{
/* If we refer to this type via sig8, we can use a simple
declaration; this is larger than the typedef, but strictly
correct. */
stub = new_die (type->die_tag, cu, NULL_TREE);
add_AT_string (stub, DW_AT_name, get_AT_string (type, DW_AT_name));
add_AT_flag (stub, DW_AT_declaration, 1);
add_AT_die_ref (stub, DW_AT_signature, type);
}
if (stub)
{
stub->die_mark++;
ref_p->stub = stub;
}
stub->die_mark++;
ref_p->stub = stub;
}
return 1;
}