diff options
Diffstat (limited to 'gcc/c-tree.h')
| -rw-r--r-- | gcc/c-tree.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/c-tree.h b/gcc/c-tree.h index 41b624e..89d0288 100644 --- a/gcc/c-tree.h +++ b/gcc/c-tree.h @@ -106,6 +106,17 @@ struct lang_type GTY(()) sizeof and typeof it is set for other function decls as well. */ #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (EXP) +/* Record whether a label was defined in a statement expression which + has finished and so can no longer be jumped to. */ +#define C_DECL_UNJUMPABLE_STMT_EXPR(EXP) \ + DECL_LANG_FLAG_6 (LABEL_DECL_CHECK (EXP)) + +/* Record whether a label was the subject of a goto from outside the + current level of statement expression nesting and so cannot be + defined right now. */ +#define C_DECL_UNDEFINABLE_STMT_EXPR(EXP) \ + DECL_LANG_FLAG_7 (LABEL_DECL_CHECK (EXP)) + /* Nonzero for a decl which either doesn't exist or isn't a prototype. N.B. Could be simplified if all built-in decls had complete prototypes (but this is presently difficult because some of them need FILE*). */ @@ -350,6 +361,27 @@ struct language_function GTY(()) int extern_inline; }; +/* Save lists of labels used or defined in particular statement + expression contexts. Allocated on the parser obstack. */ + +struct c_label_list +{ + /* The label at the head of the list. */ + tree label; + /* The rest of the list. */ + struct c_label_list *next; +}; + +struct c_label_context +{ + /* The labels defined at this level of nesting. */ + struct c_label_list *labels_def; + /* The labels used at this level of nesting. */ + struct c_label_list *labels_used; + /* The next outermost context. */ + struct c_label_context *next; +}; + /* in c-parser.c */ extern void c_parse_init (void); @@ -452,6 +484,7 @@ extern int in_sizeof; extern int in_typeof; extern struct c_switch *c_switch_stack; +extern struct c_label_context *label_context_stack; extern tree require_complete_type (tree); extern int same_translation_unit_p (tree, tree); |