*: introduce and use FAST_FUNC: regparm on i386, otherwise no-on
text data bss dec hex filename
808035 611 6868 815514 c719a busybox_old
804472 611 6868 811951 c63af busybox_unstripped
diff --git a/libbb/last_char_is.c b/libbb/last_char_is.c
index aaa85dd..b059256 100644
--- a/libbb/last_char_is.c
+++ b/libbb/last_char_is.c
@@ -12,7 +12,7 @@
/* Find out if the last character of a string matches the one given.
* Don't underrun the buffer if the string length is 0.
*/
-char* last_char_is(const char *s, int c)
+char* FAST_FUNC last_char_is(const char *s, int c)
{
if (s && *s) {
size_t sz = strlen(s) - 1;