diff options
Diffstat (limited to 'gcc/tree-iterator.c')
| -rw-r--r-- | gcc/tree-iterator.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/gcc/tree-iterator.c b/gcc/tree-iterator.c index 43218f6b754..d5343b44760 100644 --- a/gcc/tree-iterator.c +++ b/gcc/tree-iterator.c @@ -61,6 +61,47 @@ free_stmt_list (tree t) stmt_list_cache = t; } +/* A subroutine of append_to_statement_list{,_force}. T is not NULL. */ + +static void +append_to_statement_list_1 (tree t, tree *list_p) +{ + tree list = *list_p; + tree_stmt_iterator i; + + if (!list) + { + if (t && TREE_CODE (t) == STATEMENT_LIST) + { + *list_p = t; + return; + } + *list_p = list = alloc_stmt_list (); + } + + i = tsi_last (list); + tsi_link_after (&i, t, TSI_CONTINUE_LINKING); +} + +/* Add T to the end of the list container pointed to by LIST_P. + If T is an expression with no effects, it is ignored. */ + +void +append_to_statement_list (tree t, tree *list_p) +{ + if (t && TREE_SIDE_EFFECTS (t)) + append_to_statement_list_1 (t, list_p); +} + +/* Similar, but the statement is always added, regardless of side effects. */ + +void +append_to_statement_list_force (tree t, tree *list_p) +{ + if (t != NULL_TREE) + append_to_statement_list_1 (t, list_p); +} + /* Links a statement, or a chain of statements, before the current stmt. */ void |