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(un)likely: use __builtin_expect to inform expected path

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Remove also unnecessary comparison in getdata nth_field().

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This commit is contained in:
Sami Kerola 2012-11-11 23:29:07 +00:00
parent 6f179db03d
commit acba2e265e
4 changed files with 25 additions and 3 deletions
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14
configure.ac
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@ -69,6 +69,20 @@ AC_CHECK_FUNCS([\
strrchr \
])
AC_MSG_CHECKING([if the compiler supports __builtin_expect])
AC_TRY_COMPILE(, [
return __builtin_expect(1, 1) ? 1 : 0
], [
have_builtin_expect=yes
AC_MSG_RESULT([yes])
], [
have_builtin_expect=no
AC_MSG_RESULT([no])
])
if test x$have_builtin_expect = xyes ; then
AC_DEFINE([HAVE_BUILTIN_EXPECT], [1], [Define to 1 if the compiler supports __builtin_expect.])
fi
AC_CONFIG_FILES([Makefile
lib/Makefile
man/Makefile