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re PR c++/13387 (assignment to base class corrupts subclass)

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PR c++/13387
	* cp-lang.c (cxx_get_alias_set): Correct logic for a base type.

From-SVN: r74968
This commit is contained in:
Nathan Sidwell 2003-12-23 09:02:12 +00:00 committed by Nathan Sidwell
parent 4b8a63d6c2
commit 5d027e7b03
2 changed files with 8 additions and 2 deletions

5
gcc/cp/ChangeLog

@ -1,3 +1,8 @@
2003-12-23 Nathan Sidwell <nathan@codesourcery.com>
PR c++/13387
* cp-lang.c (cxx_get_alias_set): Correct logic for a base type.
2003-12-22 Mark Mitchell <mark@codesourcery.com>
* decl.c (start_function): Do not check

5
gcc/cp/cp-lang.c

@ -292,11 +292,12 @@ ok_to_generate_alias_set_for_type (tree t)
static HOST_WIDE_INT
cxx_get_alias_set (tree t)
{
if (CLASS_TYPE_P (t) && TYPE_CONTEXT (t) && CLASS_TYPE_P (TYPE_CONTEXT (t))
if (TREE_CODE (t) == RECORD_TYPE
&& TYPE_CONTEXT (t) && CLASS_TYPE_P (TYPE_CONTEXT (t))
&& CLASSTYPE_AS_BASE (TYPE_CONTEXT (t)) == t)
/* The base variant of a type must be in the same alias set as the
complete type. */
t = TYPE_CONTEXT (t);
return get_alias_set (TYPE_CONTEXT (t));
if (/* It's not yet safe to use alias sets for some classes in C++. */
!ok_to_generate_alias_set_for_type (t)