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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-04-30 07:13:38 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-04-30 07:13:38 -0400 |
| commit | 1c4fadec3712890f734ae74347f2abe3436455cb (patch) | |
| tree | e995ab257de405bab0c228c069a270e1ffa361e7 /gcc/c-common.c | |
| parent | 9727936469cd5e40eebf2b14b69a0ce376acc673 (diff) | |
| download | gcc-1c4fadec3712890f734ae74347f2abe3436455cb.zip gcc-1c4fadec3712890f734ae74347f2abe3436455cb.tar.gz gcc-1c4fadec3712890f734ae74347f2abe3436455cb.tar.bz2 | |
(enum attrs): Add A_UNUSED.
(init_attributes): Initialize it.
(decl_attributes, case A_UNUSED): New case.
From-SVN: r9545
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 4c4e317..0bdde5c 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -30,7 +30,7 @@ extern struct obstack permanent_obstack; enum attrs {A_PACKED, A_NOCOMMON, A_NORETURN, A_CONST, A_T_UNION, A_CONSTRUCTOR, A_DESTRUCTOR, A_MODE, A_SECTION, A_ALIGNED, - A_FORMAT, A_WEAK, A_ALIAS}; + A_UNUSED, A_FORMAT, A_WEAK, A_ALIAS}; static void declare_hidden_char_array PROTO((char *, char *)); static void add_attribute PROTO((enum attrs, char *, @@ -250,6 +250,7 @@ init_attributes () add_attribute (A_NOCOMMON, "nocommon", 0, 0, 1); add_attribute (A_NORETURN, "noreturn", 0, 0, 1); add_attribute (A_NORETURN, "volatile", 0, 0, 1); + add_attribute (A_UNUSED, "unused", 0, 0, 1); add_attribute (A_CONST, "const", 0, 0, 1); add_attribute (A_T_UNION, "transparent_union", 0, 0, 0); add_attribute (A_CONSTRUCTOR, "constructor", 0, 0, 1); @@ -355,6 +356,14 @@ decl_attributes (node, attributes, prefix_attributes) warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); break; + case A_UNUSED: + if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == VAR_DECL + || TREE_CODE (decl) == FUNCTION_DECL) + TREE_USED (decl) = 1; + else + warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); + break; + case A_CONST: if (TREE_CODE (decl) == FUNCTION_DECL) TREE_READONLY (decl) = 1; |