diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/ChangeLog | 3 | ||||
| -rw-r--r-- | gcc/cp/init.c | 19 |
2 files changed, 18 insertions, 4 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index 99147e2..a8d7922 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,5 +1,8 @@ 2000-01-16 Mark Mitchell <mark@codesourcery.com> + * init.c (construct_virtual_bases): Don't look up the addresses of + virtual bases at run-time. + * class.c (build_vbase_pointer): Relocate. (build_vbase_pointer_fields): Likewise. (dfs_build_vbase_offset_vtbl_entries): Likewise. diff --git a/gcc/cp/init.c b/gcc/cp/init.c index 12815e4..3828ddf 100644 --- a/gcc/cp/init.c +++ b/gcc/cp/init.c @@ -751,9 +751,9 @@ construct_virtual_bases (type, this_ref, this_ptr, init_list, flag) for (vbases = CLASSTYPE_VBASECLASSES (type); vbases; vbases = TREE_CHAIN (vbases)) { - tree tmp = purpose_member (vbases, result); tree inner_if_stmt; tree compound_stmt; + tree exp; /* If there are virtual base classes with destructors, we need to emit cleanups to destroy them if an exception is thrown during @@ -772,9 +772,20 @@ construct_virtual_bases (type, this_ref, this_ptr, init_list, flag) inner_if_stmt = begin_if_stmt (); finish_if_stmt_cond (flag, inner_if_stmt); compound_stmt = begin_compound_stmt (/*has_no_scope=*/1); - expand_aggr_vbase_init_1 (vbases, this_ref, - TREE_OPERAND (TREE_VALUE (tmp), 0), - init_list); + + /* Compute the location of the virtual base. If we're + constructing virtual bases, then we must be the most derived + class. Therefore, we don't have to look up the virtual base; + we already know where it is. */ + exp = build (PLUS_EXPR, + TREE_TYPE (this_ptr), + this_ptr, + BINFO_OFFSET (vbases)); + exp = build1 (NOP_EXPR, + build_pointer_type (BINFO_TYPE (vbases)), + exp); + + expand_aggr_vbase_init_1 (vbases, this_ref, exp, init_list); finish_compound_stmt (/*has_no_scope=*/1, compound_stmt); finish_then_clause (inner_if_stmt); finish_if_stmt (); |