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author | Martin Liska <mliska@suse.cz> | 2017-09-12 16:24:29 +0200 |
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committer | Martin Liska <marxin@gcc.gnu.org> | 2017-09-12 14:24:29 +0000 |
commit | 13bdca744bda9321d6e0f4beca7bf9ac2e0870c0 (patch) | |
tree | 9a86fbfc054247f37f8de32b3f1a30ec141c2e8e /gcc/attribs.h | |
parent | 29545149bf8ca8c89a9a7d32fe7fdb8e9294759c (diff) | |
download | gcc-13bdca744bda9321d6e0f4beca7bf9ac2e0870c0.tar.gz |
Reduce lookup_attribute memory footprint.
2017-09-12 Martin Liska <mliska@suse.cz>
* attribs.c (private_lookup_attribute): New function.
* attribs.h (private_lookup_attribute): Declared here.
(lookup_attribute): Called from this place.
From-SVN: r252022
Diffstat (limited to 'gcc/attribs.h')
-rw-r--r-- | gcc/attribs.h | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/gcc/attribs.h b/gcc/attribs.h index 06e6993e958..65e002ce988 100644 --- a/gcc/attribs.h +++ b/gcc/attribs.h @@ -87,6 +87,14 @@ extern tree handle_dll_attribute (tree *, tree, tree, int, bool *); extern int attribute_list_equal (const_tree, const_tree); extern int attribute_list_contained (const_tree, const_tree); +/* The backbone of lookup_attribute(). ATTR_LEN is the string length + of ATTR_NAME, and LIST is not NULL_TREE. + + The function is called from lookup_attribute in order to optimize + for size. */ +extern tree private_lookup_attribute (const char *attr_name, size_t attr_len, + tree list); + /* For a given IDENTIFIER_NODE, strip leading and trailing '_' characters so that we have a canonical form of attribute names. */ @@ -151,17 +159,7 @@ lookup_attribute (const char *attr_name, tree list) /* Do the strlen() before calling the out-of-line implementation. In most cases attr_name is a string constant, and the compiler will optimize the strlen() away. */ - while (list) - { - tree attr = get_attribute_name (list); - size_t ident_len = IDENTIFIER_LENGTH (attr); - if (cmp_attribs (attr_name, attr_len, IDENTIFIER_POINTER (attr), - ident_len)) - break; - list = TREE_CHAIN (list); - } - - return list; + return private_lookup_attribute (attr_name, attr_len, list); } } |