diff options
Diffstat (limited to 'gcc/lto-symtab.c')
| -rw-r--r-- | gcc/lto-symtab.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/gcc/lto-symtab.c b/gcc/lto-symtab.c index a371c0a..c5efb7f 100644 --- a/gcc/lto-symtab.c +++ b/gcc/lto-symtab.c @@ -489,7 +489,21 @@ lto_symtab_resolve_symbols (void **slot) /* From variables that can prevail choose the largest one. */ if (!prevailing || tree_int_cst_lt (DECL_SIZE (prevailing->decl), - DECL_SIZE (e->decl))) + DECL_SIZE (e->decl)) + /* When variables are equivalent try to chose one that has useful + DECL_INITIAL. This makes sense for keyed vtables that are + DECL_EXTERNAL but initialized. In units that do not need them + we replace the initializer by error_mark_node to conserve + memory. + + We know that the vtable is keyed outside the LTO unit - otherwise + the keyed instance would prevail. We still can preserve useful + info in the initializer. */ + || (DECL_SIZE (prevailing->decl) == DECL_SIZE (e->decl) + && (DECL_INITIAL (e->decl) + && DECL_INITIAL (e->decl) != error_mark_node) + && (!DECL_INITIAL (prevailing->decl) + || DECL_INITIAL (prevailing->decl) == error_mark_node))) prevailing = e; } |