diff options
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 4b1718c..1bd59ff 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -6758,5 +6758,18 @@ warn_about_parentheses (enum tree_code code, enum tree_code code_left, "have their mathematical meaning"); } +/* If LABEL (a LABEL_DECL) has not been used, issue a warning. */ + +void +warn_for_unused_label (tree label) +{ + if (!TREE_USED (label)) + { + if (DECL_INITIAL (label)) + warning (OPT_Wunused_label, "label %q+D defined but not used", label); + else + warning (OPT_Wunused_label, "label %q+D declared but not defined", label); + } +} #include "gt-c-common.h" |